Abstract
An automatic playing card handling apparatus for use in casino card games possesses a card intake portal and a first card deck discharge portal which are both accessible by a dealer. The shuffling apparatus is controlled by a microcontroller which allows two fully-shuffled, but separated, card decks to be ready for play simultaneously. A first shuffled card deck is independently supported in the first card deck discharge portal by a retractable support structure while a second shuffled card deck remains ready for play while independently supported by an elevator just below the first card deck discharge portal. A third unshuffled card deck may coexist within the card intake portal. An optical recognition sensor cooperates with the microcontroller to interrogate the integrity of each deck during randomization to discover unreadable cards, unexpected cards, damaged cards or missing cards. If the microcontroller determines that a deck is faulty, then that faulty deck is automatically disgorged from the apparatus through a second discharge port into a secured or unsecured container. Three separated decks can be automatically routed through the apparatus in order to assure uninterrupted card play. Also disclosed is a method of randomizing two groups of playing cards.
Claims
1. A card handling apparatus for randomizing and/or verifying integrity of at least a first individual deck of playing cards, the card handling apparatus comprising: A housing adaptable to be mounted onto a surface of a casino table or into an opening within the surface of a casino playing table; a card intake portal accessible by a dealer for receiving unshuffled cards; a first card deck discharge portal accessible by a dealer for receiving randomized and properly verified card decks from within the card handling apparatus; a second card deck discharge portal for ejecting faulty card decks from the card handling apparatus; a control panel for indicating a status of at least the first individual deck of playing cards; an optical recognition sensor configured to individually read a rank and a suit of each card within the playing cards of the card intake portal; one slot-less elevator aligned with an axis of a randomizing chamber having at least two elevator arms movable along the axis of and within the randomizing chamber; a retractable support structure located within the first discharge portal, having a first position in which the retractable support structure resides within a first discharge portal housing and a second position in which the retractable support structure is capable of moving through an opening in a wall of the portal housing to achieve the first position; a gripper mechanism located in the randomizing chamber and movable in an arcuate motion relative to the randomizing chamber axis; at least one microcontroller for directing the transport of the playing cards, deciding if an interrogated deck is faulty or non faulty, and providing status to a card handler operator; and the elevator arms configured to relocate and transfer the interrogated card deck to either the first or second discharge portal, dependent upon a fault criteria determination of the microcontroller.
2. The card handling apparatus of claim 1, wherein a second individual deck of playing cards is received within the card intake portal and the microcontroller initiates a second randomizing cycle of the second individual deck of playing cards, such that individual cards of the second individual deck of playing cards are interrogated by the optical recognition sensor and moved to the one slot-less elevator, further wherein the second individual deck of playing cards, after interrogation, remains upon the one slot-less elevator at completion of the second randomizing cycle in a position adjacent to the first individual deck of cards located in the first card deck discharge portal.
3. The card handling apparatus of claim 2, wherein removal of the first non-faulty deck from the first card deck discharge portal initiates the microcontroller to interrogate a sensor status of the slot-less elevator, which indicates the presence of a second shuffled non-faulty deck of cards on the slot-less elevator.
4. The card handling apparatus of claim 3, wherein when the sensor status confirms the presence of the second shuffled non-faulty deck of cards, the microcontroller initiating movement of the slot-less elevator to move the second non-faulty shuffled deck of cards to the first discharge portal after the first shuffled non-faulty deck of cards is removed from the first discharge portal.
5. The card handling apparatus of claim 1, wherein actuation of the retractable support structure is based upon the relative position of the slot-less elevator.
6. The card handling apparatus of claim 1, wherein a first shuffled non-faulty deck of cards is transferred from the slot-less elevator to the retractable support structure after the retractable support structure is relocated to its first position.
7. The card handling apparatus of claim 1, wherein the retractable support structure comprises a pair of retractable support members.
8. The card handling apparatus of claim 1, wherein the retractable support structure is collapsible by a first shuffled non-faulty deck of cards.
9. The card handling apparatus of claim 1, wherein the slot-less elevator is fork-shaped.
10. The card handling apparatus of claim 1, wherein the randomizing chamber is devoid of compartments, card slots, combs, racks, carousels or ejector blades.
11. The card handling apparatus of claim 1, further comprising a randomizing mechanism comprising the gripper mechanism configured to grip and raise at least one individual card of the first individual deck of cards through an arc to create a wedge-shaped, position-tolerant opening between two stacks of the first deck of cards.
12. The card handling apparatus of claim 1, wherein the microcontroller may designate a deck as faulty if either 1) a card within that deck is unreadable by the optical recognition sensor, 2) unexpected cards are encountered, or 3) an expected card count is not satisfied.
13. The card handling apparatus of claim 12, wherein the microcontroller may command the slot-less elevator to relocate a faulty deck to the second discharge portal.
14. The card handling apparatus of claim 1, wherein the control panel further comprises a means to alert a dealer that a faulty card deck has been ejected from the apparatus.
15. The card handling apparatus of claim 1, wherein the control panel further comprises a display to alert a dealer to a verification status of a card deck that is being processed for future use.
16. The apparatus of claim 2 whereupon three separated card decks may coexist at discrete positions within the apparatus.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1 shows a prior art example of a shuffling machine console which includes a card receiving intake portal and a shuffled card discharge portal.
(2) FIG. 2 shows the configuration of a prior art carousel-type automatic shuffler that utilizes an optical reader to verify the composition and completeness of a set of playing cards during the randomizing process.
(3) FIG. 3 shows alternative arrangements of a digital camera configured to verify a stack of cards by using optical recognition to inspect rank and suit of each card as a machine passes each playing card from one stack to another.
(4) FIG. 4 illustrates a classic prior art shuffling machine which unloads cards from an unshuffled deck into the individual slots of a carousel, randomly rotates the carousel, and then unloads cards from a randomly-chosen slot and into a discharge portal.
(5) FIG. 5 illustrates a similar prior art shuffling machine which unloads cards from an unshuffled deck into the individual slots of a vertical rack, randomly elevates the vertical rack, and then unloads cards from a randomly-chosen slot and into a discharge portal.
(6) FIG. 6 illustrates a prior art randomizing mechanism which utilizes a vertically moving comb with narrow card slots.
(7) FIG. 7 illustrates a prior art randomizing mechanism which utilizes a mechanical gripper to separate a card stack at random positions, thus enabling the insertion of an individual card which is being moved from an intake portal.
(8) FIG. 8A illustrates the insertion of a cut card into a card stack by a dealer, which is emulated by the mechanical gripper mechanism of FIG. 7.
(9) FIGS. 8B, 8C, 8D and 8E compare two prior art randomizing methods.
(10) FIG. 9 is a perspective view of the card handling apparatus being described herein.
(11) FIG. 10 is an isometric view of the of the apparatus in FIG. 9 with the outer housing removed to show the internal chambers.
(12) FIG. 11 is a view of the console control panel of the apparatus in FIG. 9, as viewed by the dealer.
(13) FIG. 12 is a side elevational section view of the apparatus herein showing the internal chambers with no cards present.
(14) FIGS. 13A, 13B and 13C are side elevational views of the apparatus which stepwise illustrate the migration of playing cards as they move through the apparatus.
(15) FIG. 14 is an isometric view of the elevator module.
(16) FIG. 15 is an isometric view of the elevator module showing the position of a subset of randomized cards.
(17) FIG. 16 is an isometric view of the of the gripper mechanism which is used to grasp and raise a sub-stack of randomized cards.
(18) FIG. 17 is a planar view of the gripper mechanism used to randomize cards.
(19) FIG. 18 is an isometric view of the gripper mechanism while grasping a stack of cards.
(20) FIG. 19 is an isometric view of the gripper mechanism creating a random wedge-shaped opening between two sub-stacks of cards.
(21) FIG. 20 is a cutaway side view of the randomizing apparatus showing a card being inserted into a randomly-created wedge-shaped opening in the receiving card stack.
(22) FIG. 21 is a side elevational section view of the randomizing apparatus showing the receiving card stack after the upper sub-stack has been lowered onto the newly inserted card by the gripper mechanism.
(23) FIG. 22 is an isometric view of the retractable supports in the first deck discharge portal.
(24) FIG. 23 is a cutaway isometric view showing the processed card stack being raised to the first deck discharge portal.
(25) FIGS. 24A, 24B, 24C and 24D are step wise illustrations showing the sequence used to transfer a processed non-faulty card deck from the elevator to the retractable support structure.
(26) FIG. 25 is an isometric view of the elevator when withdrawn to the second discharge portal position.
(27) FIGS. 26A and 26B are cutaway isometric views showing a sequence of operations as a faulty card deck is transferred to the second discharge port.
(28) FIG. 27 shows an illustration of a faulty deck collection container attached to the apparatus adjacent to the second discharge portal, allowing faulty decks to be retained for future review by the casino.
(29) FIG. 28 shows an isometric view of the elevator with its incremental encoder.
(30) FIGS. 29A and 29B show two exemplary illustrations of the receiving card stack numbering sequence utilized by the randomizing method.
(31) FIG. 30 shows a section view of the apparatus whereupon a first ready deck is positioned in the first discharge portal and a second reserve deck is positioned in its footprint while both are verified and ready for game table play. A third unshuffled deck is awaiting randomization while positioned in the card deck intake portal.
DETAILED DESCRIPTION
(32) A card handling apparatus for automatically shuffling and verifying multiple decks of playing cards is described for use in casino card games such as blackjack or twenty-one which are hosted by a card dealer at a casino table, although the card handling apparatus can be used with other card games played in a casino without departing from scope of the invention.
(33) For purposes of this explanation, the term spent deck is defined as a deck of cards having been used in a card game previously and in need of being shuffled and verified. The term processed deck is defined as a deck of cards that has been transformed from a spent deck into a shuffled (randomized) deck, and has additionally been interrogated by the apparatus described herein. The term non-faulty deck refers to an interrogated card deck that exhibits no faults after being interrogated. The term card intake portal is defined as the depository cavity within the housing of the invention whereupon a new or spent deck is deposited by the dealer for the purpose of being transformed into a processed (shuffled and verified) deck. The term first discharge portal is defined as the cavity within the apparatus housing where the non-faulty processed decks are deposited by the apparatus for removal by a dealer. The term second discharge portal refers to the portal where faulty decks are disgorged from the apparatus.
(34) An isometric view of the mechanical shuffling apparatus 100 is shown in FIG. 9. The apparatus 100 comprises a control console 105 which includes a recessed card intake portal 120 for receiving a new or spent (unshuffled) deck of playing cards from a dealer, and a first card deck discharge portal 130 for receiving a processed deck of playing cards from the randomizing mechanism that resides below that tray. A second discharge portal 140 is utilized to automatically disgorge faulty decks from the apparatus 100. The recessed cavity within discharge portal 130 includes a retractable support structure 131 whose purpose is to support a processed deck of cards. Casing members 151, 152 enclose the mechanism of the apparatus 100 and mount to the underside of the console 105.
(35) The apparatus 100 may be inserted into a cavity in a casino table surface such that only the control console 105 is visible to the dealer and the casino players. Alternatively, the apparatus 100 may reside on the top surface of a casino table, supported by rubber feet 110 (see FIG. 10). In the embedded table configuration, the lip 112 is intended to rest upon the table surface, thus supporting the apparatus 100 which is placed near the dealer within arm's reach, such that the dealer may easily insert and withdraw card decks from the portals 120, 130. When mounted into the casino table, the table surface may completely surround the periphery of control console 105, and the discharge port 140 will be located below the surface of the playing table. Alternatively, the apparatus may be partially embedded at the edge of a casino table surface with portions of the apparatus viewable or accessible on the dealer side of the table, but at a level below the casino table surface that may not be viewable by the table players.
(36) A goal of the apparatus 100 is to prepare card decks for play by shuffling those decks (randomizing) and interrogating those decks for irregularities such as missing cards or unreadable cards, and to thereafter to make only verified card decks available to the dealer. A further goal is to provide a ready deck in the shuffled deck tray and another play-ready reserve deck in a location below the ready deck, such that both are available when the dealer retires a new or spent deck to the card deck intake portal. The apparatus 100 removes faulty decks from play and signals the dealer the reason for the ejection. The apparatus 100 additionally allows the dealer to queue up three decks at the beginning of a card game.
(37) FIG. 10 shows an isometric view of the apparatus 100 with the casing removed. The various components are supported by side frames, and one side frame has been removed from the view to reveal the internal chambers. Side frame 180 is shown on the far side of the mechanism along with one of four rubber feet 110 which support the apparatus when removed from the casino table for service or maintenance. An elevator mechanism 300 is located directly below the card deck discharge portal 130, and a deck ejection portal 140 (second discharge portal) is shown sloping away from a lower portion of a randomizer housing 133.
(38) FIG. 11 shows the control console 105 and its controls as viewed from above by a dealer. The control console 105 includes various indicators and buttons 107, 108, 109, 114, 113, 115, 111 used to control the apparatus 100. A push switch 111 is located at the lower right of the console and is used to set the mode of the card handling apparatus 100. The mode establishes the parameters for different card games or different activities. For example, MODE 3 might be the mode for establishing the parameters for a blackjack game which instructs the apparatus that each deck must possess 52 cards, no jokers, and that each deck must be randomized. As another example, MODE 4 might be a mode that instructs the machine to process a deck to verify the integrity of a 52 card deck without randomizing. The digit display on a push switch is incremented by pushing either the plus or minus button which reside above and below the digit display of the push switch 111.
(39) The control console 105 additionally possesses a SHUFFLE button 115 which is used by the dealer to commence operation of the apparatus, and an ABORT button 113 which is used to stop the operation of the apparatus in the case of a failure. A 216 character display 114 displays fault messages to the dealer. Examples of such display messages are READY DECK IS VERIFIED, or DECK REJECTED-TOO MANY SPADES.
(40) The control console 105 additionally possesses three status LED's 108, 107 and 109 that indicate the status of the card decks being internally processed by the apparatus 100. The indicators 107 and 108 are bi-color LED's which may show either red or green lighting, but other colors can be used. A green light indicates that a given deck is verified, randomized and ready for play, while a red light indicates when a particular deck position is vacant. The Deck Ejected indicator 109 is activated with red flashing color when the apparatus 100 ejects a faulty card deck, thus alerting the dealer to insert a new card deck. The indicator 109 will remain flashing until the dealer inserts a new card deck into the card deck intake portal 120. Although not shown, the processed card discharge portal 130 may have a hinged cover (not shown) to prevent viewability of the cards contained within that cavity.
(41) A microcontroller operates in concert with a Real Time Clock (RTC) and segments of memory to record the exact time of certain sensor-activated events. RTC's are used to timestamp events in six timing parameters including year, month, day, hour, minutes and seconds. A commonly utilized RTC is for example model DS1307 made by Dallas Semiconductor Corporation. The RTC is used to timestamp the insertion of card decks into the card deck intake portal 120, the delivery of verified card decks to the card deck discharge portal 130, the delivery of verified card decks to the reserve position, and the delivery of faulty card decks to discharge port 140. In the case of the faulty deck rejections, the microcontroller will additionally record a reason for rejection along with a timestamp. The console 105 possesses a USB port 106 that may be used to download the timestamped data from memory of the apparatus 100. Alternatively, the apparatus 100 may be networked to a central computing device in the casino that can periodically or continually (in real time) download the timestamped data associated with rejected card decks. The network connection may be used to monitor activity and performance characteristics of the apparatus from a remote location, as is known in the art.
(42) The anatomy of the apparatus 100 is briefly explained by the section view shown in FIG. 12 which is devoid of any card decks or stacks. This view is looking into the apparatus from the side of the casino table players. The card deck intake portal 120 is shown near the top left of the view. Cards are supported in the portal 120 by shelf 128 and roller 162 which are located at the base of the portal. Feed rolls 162, 166 and 164 are utilized to move individual cards from portal 120 and past an optical recognition sensor 196, and additional feed rolls 168 and 169 move individual cards into the randomizer chamber 186. The housing 133 possess four walls which contain card decks with slight clearance around the periphery, thus forming the randomizing chamber 186. After the deck is randomized and successfully verified, an elevator assembly 300 lifts the processed deck to a retractable support structure 131 which is located in the card deck discharge portal 130. In the event that a card deck is found to be faulty after interrogation in the randomizing chamber 186, the microcontroller lowers that card deck to a transfer roll 143 which removes the card deck from the elevator arms 307 and sends the faulty deck to discharge port 140. Freely rotatable rollers 142 in the discharge port 140 allow the faulty deck to be discharged from the apparatus 100 by gravity. The apparatus 100 may be used to optically interrogate (verify) card decks without utilizing the randomization cycle, as described by the function of the mode switch 111 setting above.
(43) A more detailed explanation can be observed from FIGS. 13A, 13B and 13C, which explain the movement of a single card deck within and through the card handling apparatus 100. FIG. 13A shows a new or spent deck 600 (unshuffled) located in the card deck intake portal 120. When the dealer activates the SHUFFLE button 115, the microcontroller interrogates sensor 129 to determine if any card is present in the card intake portal 120. If a card is detected by the sensor 129, the microcontroller will activate motors (not shown) that rotate feed rolls 162, 166 and 164 until the leading edge of a card is detected by optical recognition sensor 196.
(44) In FIG. 13A, an unshuffled card of a card deck 600 is moved past the optical recognition sensor 196 and into the randomizing chamber 186, where the card stack 620 is supported by elevator arms 307 of the elevator assembly 300. The microcontroller activates a motor (not shown) to rotate feed rolls 168 and 169 which feed the cards of the card stack 620 into the randomizing chamber 186 through a slot 170 in the housing 133. The optical recognition sensor 196 is utilized to read the rank and suit of each card, in addition to counting the cards in the deck. The sensor 196 may be any optical recognition sensor as taught in the prior art, including a digital camera, CMOS camera, color pixel sensor or a CCD image sensor. In the preferred embodiment, the sensor 196 is a color pixel sensor and is used to read the rank and suit in the upper right corner of each card. This optical recognition process will continue until sensor 129 signals that no more cards are available in the card intake portal 120. Upon completion of the deck insertion into the randomizing chamber 186, the microcontroller will determine if any fault condition exists, including card shortages, extra cards, flipped cards or unreadable cards.
(45) After the randomizing cycle is completed, the microcontroller decides if a card deck is faulty. If the card deck is not faulty, and no card deck resides in the reserve deck position, the elevator arms 307 will raise the randomized (shuffled) card deck 630 to the processed deck discharge portal 130 as shown in FIG. 13B, and transfer the card deck 630 to the retractable support structure 131. A first processed card deck placed into this position upon the retractable support structure 131 is designated as the ready deck. The indicator LED 107 on the control console 105 will be activated to indicate that a verified card deck resides in the portal 130. As shown in the FIG. 13B, the elevator arms 307 will then relocate within the randomizer chamber 186 such that another unshuffled deck can be processed while the ready deck is available in the card deck discharge portal 130. Conversely, if the microcontroller has decided that the randomized deck is faulty, then it will lower the elevator arms 307 and discharge that faulty deck through discharge portal 140.
(46) If the card deck discharge portal 130 is occupied after verifying a first non-faulty card deck, then the microcontroller will raise the elevator arms 307 with the second non-faulty card deck to the reserve deck position as shown by label 630(2) in FIG. 30. The microcontroller utilizes the encoder count register to establish the ready deck position just below, and within the footprint of the card deck discharge portal 130.
(47) FIG. 13C illustrates the case in which the microcontroller has determined that a card deck is faulty and lowered the elevator arms 307 to a position below the transfer roll 143. The forked shape of the elevator arms 307 allows the elevator arms 307 to pass by and below the freely rotatable transfer roll 143 and the adjoining roll 142. Those two rolls 142, 143 take support of the faulty card deck 610 and allow gravity to discharge that deck 610 in the direction of the arrow along sloped discharge port 140. It is noted that in this figure, the elevator arms 307 have passed below the discharge roller 143 and the faulty card deck 610 has just begun to move along the discharge rollers 142 of the discharge port 140.
(48) The randomizing cycle comprises a series of motions performed by the apparatus to sort the individual cards into a randomly arranged deck within the chamber 186. The randomizing cycle will automatically start when the dealer activates the Shuffle command button 112 as shown in FIG. 10, as long as sensor 129 detects the presence of a card. Referring to FIG. 13A, a series of feed rolls 162, 166, and 164 strip the bottom card from the stack of cards 600 and move that card past the optical recognition sensor 196. The optical recognition sensor 196 acts in concert with the microcontroller to count each card, and to identify the rank and suit of each card which passes between feed roll 166 and feed roll 169. Feed rolls 168 and 169 then inject each card into the randomizer chamber 186, whereupon each card is inserted into a growing card stack 620.
(49) The randomizing chamber 186 possesses an elevator surface comprising elevator arms 307 which support the card stack 620 during randomization, and move the card stack 620 with oscillation motion in a direction parallel to the walls within the randomizing chamber 186 (FIG. 13A). The structure of the elevator assembly 300 and its driving means is shown in FIG. 14. The elevator assembly 300 has two fork-shaped arms 307, which are moved vertically by motion of a lead screw 304. Each elevator arm 307 possesses a support surface for supporting card stacks as identified by labels 307A and 307B. Guide shafts 324 and 322 prevent torsional movement of the elevator arms 307, and are attached to platform 318 to which a stepper motor 312 is mounted. The upper portion of elevator assembly 300 is stabilized by bridge 320. The stepper motor 312 rotates the lead screw 304 by means of a timing belt 308. The orientation of a card stack 620 is shown when in transit on the elevator in FIG. 15. As shown in FIG. 13A, the two elevator arms 307 of the elevator penetrate the randomizer chamber 186 through access slots 835 (see FIG. 22) in the wall 133 of the randomizing chamber 186, such that the elevator arms 307 may move freely in a direction parallel to the chamber walls. At the same time, the card stack on the elevator arms 307 is constrained on four sides by the chamber walls 133A, 133B, 133C and 133D of randomizing chamber 186 (see FIG. 22).
(50) The elevator movement is controlled in very fine increments by the stepper motor 312 in conjunction with an incremental encoder 310 which is mounted to the lead screw 304 as shown in FIG. 28. An encoder disc of the incremental encoder 310 has 200 increments per revolution which corresponds to each step of a 200 step per revolution step motor. The ratio of the lead screw 304 rotation to the elevator arm 307 linear motion is 4 millimeters per revolution. The stepper motor 310 can therefore control the elevator arms 307 in linear increments of 20 microns, where 1 micron equals one-millionth of a meter. The thickness of a typical playing card is approximately 300 microns. Thus, the stepper motor can move the elevator arms 307 with the precision of 1/15th of the card thickness. In other words, 15 motor steps moves the elevator arms 307 one card thickness. This high ratio makes the elevator mechanism controllable in fine increments, thus intolerant to positional error. Rather than the incremental encoder 310, other types of sensors could be used to monitor the linear movement of the elevator, as is known and practiced in the art.
(51) The randomizing method emulates the motion of a human dealer when cutting a card into a card deck as shown in FIG. 8A. A gripper portion of the gripper assembly 200 (FIG. 16) is shown in FIG. 17. Two gripper pads 202 are mounted on the terminal ends of a first gripper arm 203 and a second gripper arm 204, with each pivoting upon pivot screws 206. The two arms are actuated by two small solenoids 207 and 208 which are mounted on the gripper frame 210. When the solenoids are activated, the arms 203, 204 and their associated pads 202 move in the direction of the arrows to pinch the lateral surfaces of a card stack as shown in FIG. 18. Upon deactivation of the solenoids 207, 208, the two arms 203, 204 are moved in the reverse direction by spring 212, which relaxes the grip and releases the card stack 620. In the relaxed position, there exists only slight clearance between the gripper pads 202 and the lateral surface of card stack 620.
(52) The complete gripper assembly 200 is shown in FIG. 16 where the gripper assembly 200 is pivotally mounted on a shaft 209. The pivotal mount allows the gripper frame 210, including gripper arms 203 and 204, to move in an arc after the gripper solenoids 207, 208 have been activated. A cam follower roll 222 is mounted to the follower mount 218 which is rigidly attached to the gripper frame 210. During the gripping cycle, at least one card of the card stack 620 is grasped by the gripper arms 203 and 204, and thereafter lifted by the cam 220 to move an upper sub-stack of cards 620U upward through an arc. The motion is illustrated in FIG. 19 where the upper sub-stack is shown as 620U.
(53) The elevator assembly 300 is used to position a card stack relative to the gripper mechanism 200, in order to allow the gripper assembly 200 to split the card stack into two sub-stacks, 620U, 620L. The orientation between the elevated, upper sub-stack 620U, the gripper assembly 200, the lower sub-stack 620L, and the elevator assembly 300 is shown in FIG. 19. A lower card sub-stack 620L is shown supported by the elevator arms 307, while an upper card sub-stack 620U is shown lifted in an arc about pivot P1 which is locationally fixed to the frame of apparatus 100. The vertical position of the split between the upper sub-stack 620U and the lower sub-stack 620L is determined by the microcontroller which relocates the elevator arms 307 just prior to the gripping cycle. As shown in FIG. 19 and FIG. 20, the elevator arms 307 position a card stack 620 in a randomly selected elevation and the gripper assembly 200 thereafter splits the card stack through an arc at that random location. The lower sub-stack 620L is held stationary by the elevator arms 307 while the gripper arms 203, 204 raises the upper sub-stack 620U, and while a new card 622 is inserted into the wedge-shaped opening 326. As illustrated in FIG. 19, the axis of the elevator may form an angle with the surface of the casino table that is other than perpendicular.
(54) The purpose of the cam 220 is two-fold. First, the gripper assembly 200 creates a large wedge-shaped opening 326 which is tolerant to curved or bent cards as illustrated by warped card 622 in FIG. 19. The large wedge-shaped opening 326 overcomes the jamming problem exhibited by prior art narrow slot carousel and moving comb shuffling devices shown in FIG. 4, FIG. 5 and FIG. 6. Secondly, the cam 220 is designed to alleviate the cyclic life burden on the components of the elevator assembly 300. The prior art devices that utilized gripper mechanisms (see prior art FIGS. 8B-8E) required three elevator motions for each card insertion; a first elevator motion to arrive at the splitting plane; a second elevator motion to split the deck into two sub-stacks; and a third elevator motion to merge the two sub-stacks together after each card insertion. For one deck of 52 cards, for example, the prior art elevators must shuttle through 156 (352) motion cycles. In contrast, the elevator assembly 300 of an embodiment of the present invention herein relocates just once during each card insertion cycle, thereby extending the service life of the elevator assembly 300 as compared to the prior art.
(55) The previously described grasp-elevate-insert-release cycle is repeated for each of the cards in an unshuffled deck until all cards have been transferred to the card stack 620 in the randomizing chamber 186. The card stack 620 thus begins with one card and builds to a full deck of 52 cards in the case that 52 cards is the desired deck size. Each new card is inserted into the card stack 620 at randomly-chosen elevator positions by the microcontroller, which utilizes a depletion algorithm to determine a plane between two adjacent cards within the receiving card stack 620.
(56) The depletion algorithm is based upon a physically-generated index that is derived from the optical recognition sensor 196. That optical recognition sensor 196 detects the trailing edge of each card and increments a count that indicates the number of cards that have been depleted from the card intake portal 120. The depletion count is a physically detected index that is used by the randomizing algorithm. The algorithm can be expressed as equation 1.1:
P=RAND[1 to D](1.1) Where: P=the elevated insertion plane, and D=the depletion number of the card being inserted, and RAND[1 to D] is a random number from within the range between 1 and D
(57) Equation 1.1 can be understood and appreciated from viewing the examples in FIG. 29A and FIG. 29B where the numbered arrows indicate optional plane locations within a card stack. In FIG. 29A, the depleted card number is 4, which means that this is the 4th card to be removed (depleted) from the unshuffled card stack residing in the intake portal. The microcontroller will choose a plane in real time for inserting that 4th card into the previous 3-card stack, by generating a random number in the range of 1 to 4, where the bottom of the stack is always designated as plane number 1. In other words, the microcontroller randomly chooses one of four available planes for the insertion in real time. The elevator assembly 300 then positions the stack precisely such that the gripper pads 202 can create the wedge-shaped opening 326 at the chosen plane. The card is thereafter inserted into the wedge-shaped opening 326.
(58) In FIG. 29B, the depleted card number is 9, which means that this is the 9th card to be removed (depleted) from the unshuffled card stack. The microcontroller will choose a plane in real time for inserting that 9th card into the previous 8-card stack, by generating a random number in the range of 1 to 9, where the bottom of the stack is always designated as plane number 1. In other words, the microcontroller randomly chooses one of nine available planes for the insertion. The elevator then positions the stack precisely such that the gripper pads 202 can create the wedge-shaped split at the chosen plane, insert a new card, and thereafter lower than the upper sub-stack 620U onto the newly inserted card. In this way, the randomized stack is incrementally constructed.
(59) There is no preconceived boundary for the randomizing algorithm of equation 1.1, which depends only upon the physically detected depletion count. For example, a 65th depleted card would be randomly inserted in one of 65 randomly selected planes. This type of randomization is mathematically ideal randomization, because each and every card is randomly inserted into a growing randomly-generated card stack, until the entire deck is transformed into a randomly distributed sequence. This is in contrast to several prior art shufflers that generate a virtual random insertion sequence prior to physically moving any cards.
(60) After the randomizing cycle has been completed, the elevator arms 307 raise the processed card deck 630 to the card deck discharge portal 130, where the processed card deck 630 is transferred to a retractable support structure as shown in FIG. 13B. A preferred embodiment for the retractable support structure is shown by the retractable support elements or shutters 131 in FIG. 13B, FIG. 22 and FIG. 23. Referring to FIG. 22, a pair of shutters 131 are rotatably mounted to the walls of the housing 133 and rotate upon pivot shafts 134, which are held in a supporting position by torsion springs 136. Referring to FIG. 23, the two pivot shafts 134 form axes P2 and P3, about which the shutters 131 rotate. As the elevator arms 307 raise the processed card deck 630 towards the card deck discharge portal 130, the processed card deck 630 pushes against angular surfaces 131A on the underside of the shutters 131, forcing it outward. FIG. 23 shows a cutaway oblique view of a processed card deck 630 being raised by the elevator arms 307 and located just beneath the angular surface 131a of shutters 131. The card deck 630 is just about to collapse the shutters 131 in this illustration.
(61) FIGS. 24A, 24B, 24C, and 24D illustrate side elevational section views which explain the sequence of collapsing the retractable support elements or shutters 131. In FIG. 24A, a non-faulty processed card deck 630 is shown in the reserve deck position and the ready deck has just been removed. The state change of sensor 138 signals the absence of the ready deck and triggers the microcontroller to examine the incremental encoder count of the incremental encoder 310, which shows that the elevator arms 307 being held in the reserve deck position. The microcontroller thus commands the elevator motor 312 to raise the processed card deck 630 to the card deck discharge portal 130. Referring to FIG. 24B, as the elevator arms 307 raises the processed card deck 630, the retractable supports 131 are pivoted outwardly away by contact between the angular surfaces 131A and the lateral surfaces of the deck 630. FIG. 24C shows that the processed card deck 630 is raised slightly above the retractable supports 131, allowing them to snap back into position as urged by torsion springs 136. In FIG. 24D, the elevator arms 307 have transferred the processed card deck 630 to the retractable supports 131, and the elevator arms 307 continue moving downward. The elevator arms 307 thus transfer the processed card deck 630 from the elevator arms 307 to the retractable supports 131 by a downward motion. The elevator arms 307 are thereafter available to participate in randomizing additional card decks within the lower portion of randomizing chamber 186.
(62) Termination of the randomizing cycle is detected by the microcontroller via sensor 129 (see FIG. 13A). Upon termination of the randomizing cycle, the microcontroller will determine if processed card deck 630 is faulty. If the processed card deck 630 is not faulty, the microcontroller will check the status of the reflective sensor 138 (FIG. 24A) which detects presence of a ready deck. If no ready deck is detected, the microcontroller will commence the cycle of transferring the processed card deck 630 to the retractable supports 131 in the processed deck discharge portal 130. If a ready deck is present, then the microcontroller will command the elevator arms 307 to move to the footprint position and hold the processed card deck 630 in the reserve deck position as shown by the reserve deck 630(2) in FIG. 30. The microcontroller detects the presence of a deck in the reserve deck position by utilizing the cumulative count of the incremental encoder 310 which keeps track of the elevator height in terms of encoder register counts. For example, an encoder count of 3490 represents the elevator height at the footprint position, and an encoder count of 5340 represents the zenith of the elevator just prior to transferring a verified deck to the retractable support structure 131.
(63) FIG. 25 illustrates an isometric view of the elevator support surfaces 307A and 307B when the elevator arms 307 are withdrawn to its lowest elevation to release a faulty card deck. In this view, the support surfaces 307A and 307B are crosshatched to help illustrate their position in the recessed openings 336 which surround the lateral sides of transfer roll 143. FIGS. 26A and 26B show isolated section views with the elevator assembly 300 and discharge port 140 showing the process of transferring the faulty card deck 610 to the rollers 142 in the discharge port 140. As the elevator arms 307 are lowered toward a discharge position in FIG. 26A, the faulty card deck 610 first makes contact with transfer roller 143, near one edge of the deck, which induces the faulty card deck 610 to begin rotating counter clockwise as indicated by the rotary arrow. In this figure, the faulty card deck 610 is partially supported by the tip of elevator surface 307A which is moving downward toward a recessed position. As the elevator arms 307 continue moving downward, the faulty card deck 610 rotates until gaining additional support from roller 142 as shown in FIG. 26B. The transfer from the elevator arms 307 to the discharge port 140 has now taken place and the faulty card deck 610 has begun moving in the direction of the arrow. It is noted that in FIG. 26B, the elevator arms 307 are in a fully retracted discharge position where the elevator arms 307 reside temporarily while the faulty card deck 610 travels along rollers 142 and is ejected from the apparatus.
(64) Referring to FIG. 26B, it can be seen that the axis of the output port 140 is sloped so as to permit gravity to propel the faulty deck 610 along the axis of the arrow to the opening in the housing and into container 154 (FIG. 27). The discharge of faulty deck 610 could also be propelled by motorized means such a moving belt or conveyer as is known in the art. In a motorized variant, the axis of the faulty deck discharge motion could form a non-sloped angle with the casino table surface, or could be angled upward to a discharge port anywhere on the lateral surface of the housing. Alternately, the faulty deck 610 could be discharged directly through a port within the bottom surface of the apparatus housing by gravity.
(65) At the time that the faulty card deck 610 is disgorged from the apparatus the microcontroller activates an indicator to alert the dealer that a faulty card deck 610 has been removed, as shown for example by the Deck Ejected indicator 109 in FIG. 11. In addition, the brief reason for the rejection is displayed in the display 114 as shown in FIG. 11. The microcontroller additionally records the deck removal event with a timestamp and the reason for rejection in the memory of the apparatus. Optionally, that data may be sent to a server on a network.
(66) The controller may be field-programmable to adjust the deck rejection criteria in accordance with the policy of a given casino. For example, the deck rejection criteria may be programmed so as not to reject decks with one or more flipped cards. If desired, the apparatus could be programmed to return such decks to the reserve deck or ready deck positions such that the flipped card could be remediated by the dealer. In this case, the display would indicate a flipped card warning to the dealer, but the apparatus would not eject that deck. Other casinos may not opt for the dealer to waste any time in repairing a deck having flipped cards.
(67) Once a faulty card deck 610 has been removed from the three-deck rotation, a new card deck must be added to replace the ejected card deck. The Deck Ejected indicator alerts the dealer to the need for inserting a new card deck into the card deck intake portal 120, which can be done between hands with only minor interruption. The microcontroller will then cease flashing of the Deck Ejected indicator 109 when a new card deck enters the card deck intake portal 120.
(68) Faulty card decks 610 are discharged through the discharge port 140 in the housing of the apparatus a shown in FIG. 9. Such faulty card decks 610 could be discharged into a common wastebasket located below the casino table. Some casinos may want to manually review faulty card decks off-line (away from the table) without disturbing the card game. The apparatus possesses notches 148 as shown in FIG. 9 for the purpose of attaching a secured or unsecured container to capture the discharged faulty card decks. For example, FIG. 27 illustrates an unsecured container 154, attached to the apparatus, for capturing discharged card decks by engaging notches 148. Depending upon casino policy, the faulty deck rejection event may cause the microcontroller to signal a pit boss or personnel from security such that the faulty card deck can be taken away for inspection while the card game continues. Conversely, some casinos may not wish to interrogate each discharged faulty card deck. Furthermore, some casinos may desire that the faulty deck rejection event be silent, such that the table players remain unaware.
(69) The astute casino card dealer will utilize the invention to sustain the rate of table play by maintaining a three-deck rotation as illustrated by the preferred embodiment shown in FIG. 30. The dealer will queue three decks as shown in FIG. 30 at the start of his shift or at the start of a new game with fresh players. In FIG. 30, the dealer has just loaded a third deck 600 into the card deck intake portal 120. The ready deck 630(1) resides in the processed deck discharge portal 130 as supported by the retractable supports 131 and the reserve deck 630(2) resides in a footprint position as supported by the elevator arms 307.
(70) When the dealer removes the ready deck 630(1) to the table and commences further game play, the apparatus responds automatically. The removal of the ready deck 630(1) changes the state of sensor 138 (FIG. 24A) and triggers the microcontroller to move the reserve deck 630(2) upward and transfer that card deck to retractable supports 131. The reserve deck 630(2) then becomes the ready deck 630(1) and the elevator arms 307 then relocate to a position ready for randomizing another card deck 600 which may await in card deck intake portal 120.
(71) The action of transferring the reserve deck 630(2) to the processed deck discharge portal 130 also triggers the microcontroller to interrogate the condition of the card deck intake portal 120 by checking the state of sensor 129 (FIG. 13A) and reflective sensor 138 (FIG. 24A). When sensor 129 detects the presence of a card, then the apparatus will automatically commence the next processing cycle by randomizing and interrogating the card deck that resides in the card deck intake portal 120.
(72) The apparatus of the invention is capable of facilitating a three-deck rotation which guarantees that no faulty card deck 610 reaches the card deck discharge portal 130. With a three-deck rotation, three discrete, separate card decks may reside within the apparatus at any point in time as shown in FIG. 30. In this figure, the ready deck 630(1) and the reserve deck 630(2) were previously verified and will allow the dealer uninterrupted game play. When the dealer removes the ready deck 630(1) in FIG. 30, the remaining two decks 630(2), 600 will advance through the apparatus automatically and the card deck intake portal 120 will become vacant. If the deck being randomized is found to be faulty, the microcontroller will command the elevator arms 307 to disgorge it through the discharge port 140.
(73) The invention relieves the dealer of any distraction or interruption in table play that would otherwise require a dealer to unload a shuffling apparatus and thereafter manually disassemble, reconstruct or cure contaminated card decks when such decks are detected by the microcontroller. The dealer can therefore remain confident that the casino game may continue without interruption. Alternatively, the invention denies the dealer the discretion to continue play with a corrupt card deck as in the case of player-dealer collusion. In this way, the invention prevents cheating.
(74) The apparatus 100 herein can be utilized as a device to verify the integrity of card decks without randomizing the cards. The verify-only mode can be set by utilizing the push switch selector 111 on the apparatus console 105 as shown in FIG. 11. As shown in FIG. 13A, cards 620 may be stacked upon the elevator arms 307 within the randomizing chamber 186 without randomizing after interrogation by the optical recognition sensor. The interrogated non-faulty card deck is then transferred to the card deck discharge portal 130 as shown in FIG. 13B. If that card deck has been verified without error, then the Ready Deck indicator light 107 on the console 105 will be activated with green color (see FIG. 10). If the microcontroller detects a verification error, the faulty deck will be disgorged from the apparatus. The time for processing a card deck in the verify-only mode will be somewhat shorter because no randomization is needed.
(75) During the verification only mode, the elevator surfaces 307 do not relocate for each and every card insertion cycle. Instead, the elevator surfaces 307 are incrementally moved downward by the elevator mechanism 300 to accommodate the increasing thickness of the stack 620 that accumulates upon the elevator support surface (see FIG. 13A). After each group of 13 cards accumulates on the elevator 307, the elevator is abruptly lowered by an amount equal to the thickness of 13 cards. This stack settling cycle is intended to remove air that is trapped between card layers, and is nominally performed four times during the verification of a 52-card deck. The number of cards in the stack settling cycle (13) may be modified as appropriate. The number could be as little as one, but that choice may be considered impractical by the designer of the apparatus.
(76) Also, during the verification only mode, the cam-controlled platform 210 is cycled for each and every card insertion cycle (see FIG. 16). However, the solenoids 207 and 208 that actuate gripper arms 203 and 204 are only actuated during specific insertion cycles. Prior to each incremental stack settling cycle of the elevator 307, the cam-controlled gripper arms 203 and 204 are also actuated by solenoids 207 and 208 so as to remove accumulated trapped air from within the growing stack 620. This gripper cycle takes place just prior to each of the incremental stack settling cycles of the elevator 307. The elevator 307 moves each accumulated stack to an elevation where the gripper arms 203 and 204 may grasp the bottom of the stack 620, and the gripper arms thereafter actuated by the solenoids 207 and 208. The cam-controlled gripper mechanism 200 then raises the accumulated stack 620 and thereafter releases it, allowing the accumulated stack 620 to free fall upon the elevator surface 307 to remove accumulated air from the stack. Both the elevator mechanism 300 and the gripper arms 203 and 204 are actuated during these stack settling cycles in the verification only mode.
(77) The relational geometry as shown in the figures is not limiting. For example, the axis formed by the lateral walls of the randomizing chamber 186 as shown in FIG. 12 may form an oblique non-perpendicular angle with the surface of the casino table. The planes which define the openings of the card intake portal 120 and the card discharge portal 130 may be offset from each other or form acute angles with the surface of the casino table. The rectangular openings of the card intake portal 120 and the card discharge portal 130 (FIG. 11) may be non-parallel with any lateral surface of the apparatus housing. Furthermore, the axis of the shuffling chamber 186 shown in FIG. 12 is not limited to a perpendicular orientation with the card intake portal 120 and the card discharge portal 130.
(78) Referring to FIG. 13A, the cards are transported by nip rollers 162, 164, 166, 168, and 169 in that figure. However, it is noted that the cards may be transported from the input tray 120 to the randomizing chamber 186 by any other transport means that is known in the art. Also referring to that figure, it can be seen the optical recognition sensor 196 could also reside at the position of the card present sensor 129. Furthermore, the functions of the optical recognition sensor 196 and the card present sensor 129 could optionally be combined and reside at the position of sensor 129. Other sensor locations, other sensor types, and other optical recognition devices could be utilized as known and practiced in the art.
(79) Referring to FIG. 13B, the discharge port 140 need not be sloping such that it depends upon gravity to discharge a deck of cards. Alternately, the discharge port 140 could be belt driven and oriented to exit from the shuffling chamber 186 along any other axis, including upward to the uppermost surface of the apparatus. Also, the locations of the discharge portal 130 and the discharge port 140 could be reversed in a tabletop variant of the apparatus, such that non-faulty decks were discharged through lateral walls of the apparatus and faulty decks were elevated to a location proximate the upper surface of the apparatus. In the latter option, a solenoid or other stopping device could be used to stage two non-faulty decks along the axis of the rollers 142 of the discharge port 140 as shown in FIG. 26B. The discharge port 140 could also be configured to pierce any other exterior surface of the housing, including the uppermost and lowermost surfaces.
(80) Referring to FIG. 11, various control means on the control panel are shown implemented as push switches, push buttons, indicator lights and a 2-line LCD display. However, any other control means, or combinations of control means could be implemented to perform the control and status awareness functions, as is well known and practiced in the art. Those controls could also be located in different geometric orientations than shown, as for example on a control region that is elevated or angularly re-oriented away from the surface of the card intake and discharge portals. The control region could also be located on a lateral surface of the device housing in a tabletop variant of the apparatus. Moreover, the control functions could be simplified and centralized by utilizing a single or multiple touch screen displays. The control panel could also be removable from the apparatus housing so as to be more conveniently located by an operator. The operation of the control panel and the apparatus could also be monitored remotely over a network by casino personal or a centralized server.
(81) Referring to FIG. 14, the elevator arms 307 could be translated by devices other than the lead screw 304 and stepper motor 312. For example, toothed belts or rack and pinion gears could be utilized. Cable drives and different types of motors such as linear motors or servo motors could also be utilized, as well as any other elevator moving means and sensing means as known in the art. The randomizing algorithms that are explained in FIG. 29A and FIG. 29B are not intended to be limiting. Other randomizing algorithms, as known in the art, could be implemented utilizing the fork-shaped elevator.
(82) Referring to FIG. 16 and FIG. 17, the gripper closing function of the solenoids 207 and 208 and the return function of spring 212, could be performed by a number of alternative moving mechanisms, including servos, toothed belt drives, geared drives, rotary solenoids or any other rotatable moving means as is known and practiced in the art.
(83) Accordingly, it is to be understood that the embodiments of the invention herein described are merely illustrative of the application of the principles of the invention. Reference herein to details of the illustrated embodiments is not intended to limit the scope of the claims, which themselves recite those features regarded as essential to the invention.
