Shape memory metal artificial bait

Abstract

An artificial bait having a housing in the shape of an insect or animal, a power source arranged in the housing, a controller arranged in the housing, a hook. The housing including shape memory alloy (SMA) in the form of one or more SMA wires, which are operatively arranged with one or more spring wires to cause one or more body parts of the housing to move.

Claims

1. An artificial bait comprising: a housing in the shape of an insect or animal; a power source arranged in the housing; an electric motor comprising a rotor arranged in said housing; a controller arranged in the housing; a hook, and wherein the housing is in the shape of a bee having a pair of paddles in the shape of bee wings; said wings having magnets attached at their distal ends configured to interact with said rotor, so that the bee shaped housing will disturb the water to emulate the buzz of a bee on the surface of the water; said controller comprises an oscillator configured to intermittently move said paddles at a predetermined frequency between periods of vibration and no vibration.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The invention will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawing wherein:

(2) FIG. 1 is a top view of a dragonfly embodiment of the invention.

(3) FIG. 2 is a perspective view of FIG. 1.

(4) FIG. 3 is a side view of FIG. 1.

(5) FIG. 4 is a perspective view of a bee embodiment of the invention.

(6) FIG. 5 is a top view of FIG. 4.

(7) FIG. 6 is a cross-section view of FIG. 5.

(8) FIG. 7 shows different rear views of FIG. 4.

DETAILED DESCRIPTION OF THE INVENTION

(9) With reference now to the drawing, and in particular to FIGS. 1 through 13 thereof, an artificial bait using shape memory alloy (SMA), motors, and voice coil/solenoids to create movement in the bait, embodying the principles and concepts of the present invention will be described.

(10) This invention uses Shape Memory Alloys (SMA), motors, and voice coils/solenoids to create realistic motions in the bait. There are three main types of motion that this invention seek to emulate. A bug of some type struggling on the surface of the water; a worm, frog or other non-bait fish type creature, or a smooth realistic motion of a bait fish. These are only examples of the motion and types of bait and are not intended to limit the scope of the invention.

(11) By way of further explanation, current running through the SMA wire causes it to heat up, which triggers the SMA to change shape to its warm state shape. The invention will use a PWM circuit to control total power put in to the SMA wire. The control will be able to monitor the voltage of the power source and adjust the PWM duty cycle to keep a linear response as the power source decays. This will allow the bait to get longer life from the power source. When current is not running through the SMA wire, it will cool and revert to its cool state shape.

(12) The drive to move the bait uses shape memory alloys (SMA). Shape Memory Alloys (SMA) wires are a very compact way to drive these motions. They can be imbedded in to rubber which makes them ideal for fishing lures. Small efficient motors could also be used to emulate repetitive motion of beating wings. Magnetic coupling of a motor, solenoid or voice coil can be used to couple the motion device to the moving component such as a wing through a sealed rubber body.

(13) The power source can be mercury free batteries or preferably a super capacitor. The super capacitor has the advantage of being capable of a very large number of charge cycles without degrading. It is also advantages to have 2 super capacitors. A smaller one that could maintain a voltage to run the control circuit and a larger one could be used to drive the motion device. Since the motion device can be drive at low voltage than the control circuit this scheme would increase the usable time after a charging. Super capacitors also have the advantage of that they can be completely seal in since they never need to be changed. They also charge very quickly so they do not need to be charged a head of time. This quick charge ability also mean they don't need to last as long since charging them is less of an inconvenience. Their quick charging and shorter run time also mean they run without a switch. The user would simple charge it and let it run until it dies when they are finished using it. This not only help reduce the cost and size of the lure but also help reliability issues of having a switch on a sealed unit.

(14) The control can be as simple as a transistor flasher circuit to a micro controller. Micro controllers can be used to run motors at varying RMPs with a Pulse Width Modulation (PWM) drive. RMPs can be varied to emulate different bug's wing beats or tail motions. Micro controllers can also use PWM to drive SMA wires. They can also monitor the voltage of the power source and increase the PWM duty cycle as voltage level drops to help extend the usable time between changings.

(15) Referring now to FIGS. 1-3, a dragonfly embodiment of the invention is shown generally at 10. Four wings 12 are connected to the housing, which hold the power source 14, the controller 20 and the tail section, which contain a SMA wire 16 connected to a spring wire 18. A hook is provided at 22. The dragon fly can use an SMA wire 16 connected to a spring wire 18, both embedded in the rubber tail section to create slow tail motions. This embodiment could either have a magnetically coupled motor or SMA wire to pulse the wings. The wings could also be controlled to do short bursts of higher energy, higher frequency, wing motions to attract fish from a longer distance away. Then this embodiment could be controlled to make slower, low energy tail motions to continue attracting fish as they get closer in while using less energy to extend the life of the power device

(16) Referring now to FIGS. 4-7, a bee embodiment of the invention is shown generally at 30. The bee housing 32 will have 1 or 2 paddles that are magnetically coupled to a small motor on the inside of the housing, and a hook 36. The paddles 34 will disturb the water to mimic the buzz of the wing in the water. The bee will most likely have a small oscillator circuit to control it. The oscillator will cause the paddles to buzz for the short interval of time then dwell for a set time before doing it again. FIG. 5 better shows the magnets attached to the paddles 34 which are used to make the paddles spin on hinge 38. FIG. 6 shows the inside of housing 32, with the power source 14, motor 40 and rotor 42. FIG. 7 shows that the rotor can be ferromagnetic or have magnets mounted at each end, to cause the paddles to rotate.

(17) The voice coil and motor spin magnets of FIG. 7, with opposite facing polarity would cause the wings (or other parts) to move by magnetically coupling to magnets or magnetic metals embedded in the wings (or legs or body parts). The advantage of embedding magnets is that they will attract to one magnet polarity then repel when the voice coil current direction is reversed, or opposite rotating magnet is come around. This will double the range of motion.

(18) There are many other insects or animals which could be moved with shape memory metal to make an artificial bait. This disclosure is not limited to only the above examples.

(19) The drive system can make the artificial wings of the insect move by being driven by a voice coil, a motor or the shape memory metal. The internal magnets can be coupled to a single blade of a spinning propeller in one or even two areas of the body. A bent wire can also be spun by a motor to hit the water and create an attractive noise or water disruption. A motor with an offset weight on a drive shaft could be used to vibrate the legs or body. A paddle could be vibrated using a voice coil to disturb the water.

(20) Therefore, the foregoing is considered as illustrative only of the principles of the apparatus of a shape memory artificial bait. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.