Abstract
Coils for receiving or transmitting electromagnetic signals comprising a plurality of concurrently wound and fully or partially interpenetrating windings for which the resonance frequency can be varied over a broad range. The presently described embodiments provide for electromagnetic pickups for stringed musical instruments; however, it is appreciated that other embodiments providing for a wide variety of devices comprising pickup coil sensors are apparent. It is also apparent that a wide variety of devices are possible in which coils with concurrently wound and interpenetrating windings will serve as transmitting coils.
Claims
1. A pickup coil sensor comprising: a plurality of windings comprising partially and secondary windings wound concurrently to form a region of partially interpenetrating windings; and the region of the partially interpenetrating windings beginning in the midst of the primary windings.
2. A sensor as in claim 1 wherein the primary and secondary windings are of the same gauge.
3. A sensor as in claim 1 wherein the primary and secondary windings are of different gauges.
4. A sensor as in claim 1, wherein the individual windings of the primary and secondary windings have a different number of turns.
5. A sensor as in claim 1 wherein the region of the partially interpenetrating windings terminates at one end of the plurality of the windings.
6. A sensor as in claim 1 wherein the region of the partially interpenetrating windings terminates in the midst of the primary windings.
7. A sensor as in claim 1 wherein the region of the partially interpenetrating windings terminates in the midst of the secondary windings.
8. A pickup coil sensor comprising: a core; a primary winding at least partially surrounding the core; a secondary winding at least partially surrounding the core; and a region comprising the primary and secondary windings being at least partially interpenetrating, at least one of a beginning and an ending of the region being in the midst of one of the primary and secondary windings.
9. The sensor of claim 8 wherein the region begins at the start of the primary and secondary windings.
10. The sensor of claim 8 wherein the region begins in the midst of the primary winding.
11. The sensor of claim 8 wherein the region ends in the midst of the secondary winding.
12. The sensor of claim 8 wherein the region ends in the midst of the primary winding.
13. The sensor of claim 8 wherein the region begins and ends in the midst of the primary winding.
14. The sensor of claim 8 wherein the region begins at the start of the primary and secondary windings and ends in the midst of the primary winding.
15. The sensor of claim 8 wherein the region begins in the midst of the primary winding and ends at the end of the primary and secondary windings.
16. The sensor of claim 8 wherein the region begins in the midst of the primary winding and ends in the midst of the secondary winding.
17. A method for adjusting the frequency response characteristics of a pickup coil sensor, the method comprising: providing a pickup coil sensor comprising primary and second windings that establish a region of at least partially interpenetrating; adjusting the frequency response characteristics of the pickup coil sensor by performing at least one of the following: altering the number of turns in each of the primary and secondary windings; altering the degree of interpenetration in the region; and altering the position where the region of the interpenetration occurs in the pickup coil sensor.
18. The method of claim 17 wherein the adjusting comprises altering the degree of interpenetration in the region.
19. The method of claim 17 wherein the adjusting comprises altering the position where the region of the interpenetration occurs in the pickup coil sensor.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The foregoing and other objects, features, and advantages will become apparent from the following description of present embodiments in conjunction with the accompanying drawings, of which there are four sheets, in which:
(2) FIG. 1 is a schematic diagram of a single-winding pickup coil sensor comprising a core 101 and a winding 102.
(3) FIG. 2 is a schematic diagram of a pickup coil sensor comprising a core 101, a primary winding 202, and a secondary winding 203 in which the primary and secondary windings are concurrently wound and fully interpenetrating.
(4) FIG. 3 is a schematic diagram of a pickup coil sensor comprising a core 101, a primary winding 302, and a secondary winding 303 in which the primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins at the start of the windings and ends in the midst of the primary winding 302.
(5) FIG. 4 is a schematic diagram of a pickup coil sensor comprising a core 101, a primary winding 402, and a secondary winding 403 in which the primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins in the midst of the primary winding 402 and continues to the end of the windings.
(6) FIG. 5 is a schematic diagram of a pickup coil sensor comprising a core 101, a primary winding 502, and a secondary winding 503 in which the primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins and ends in the midst of the primary winding 502.
(7) FIG. 6 is a schematic diagram of a pickup coil sensor comprising a core 101, a primary winding 602, and a secondary winding 603 in which the primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins in the midst of the primary winding 602 and ends in the midst of the secondary winding 603.
(8) FIG. 7 is a perspective view of a general form of a pickup coil bobbin 106 comprising a core 101, an upper flange 104 and a lower flange 105. A partial winding 102 is depicted, with arrows 103 showing the counter-clockwise direction of winding when viewed from the top. Clockwise winding is also equally applicable to pickup coil sensors.
(9) FIG. 8 is a perspective view of a general form of a pickup coil sensor comprising a bobbin 106 and a coil 107.
(10) FIG. 9 shows the depiction used for the primary winding 901, the depiction used for the secondary winding 902, and the depiction used for the region of interpenetration of the primary and secondary windings 903 that are used in FIGS. 10-15.
(11) FIG. 10A is a cross-sectional view of a single-winding pickup coil sensor as depicted in FIG. 1 taken along the section 1-1 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(12) FIG. 10B is a cross-sectional view of a single-winding pickup coil sensor as depicted in FIG. 1 taken along the section 2-2 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(13) FIG. 11A is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 2 taken along the section 1-1 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(14) FIG. 11B is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 2 taken along the section 2-2 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(15) FIG. 12A is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 3 taken along the section 1-1 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(16) FIG. 12B is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 3 taken along the section 2-2 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(17) FIG. 13A is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 4 taken along the section 1-1 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(18) FIG. 13B is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 4 taken along the section 2-2 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(19) FIG. 14A is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 5 taken along the section 1-1 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(20) FIG. 14B is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 5 taken along the section 2-2 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(21) FIG. 15A is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 6 taken along the section 1-1 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(22) FIG. 15B is a cross-sectional view of a two-winding pickup coil sensor as depicted in FIG. 6 taken along the section 2-2 of FIG. 8. Refer to FIG. 9 for conventions regarding the depiction of the windings.
(23) FIG. 16 is a perspective view of a general form of a two-coil pickup coil sensor comprising two bobbins (106a and 106b), and two coils (107a and 107b).
(24) FIG. 17 is an overlay of frequency response profiles for pickup coil sensors as depicted in FIG. 10A-10B comprising windings of ˜2,500 turns 1701 and ˜5,000 turns 1702 of 42 AWG enameled copper wire and a pickup coil sensor as depicted in FIG. 11A-11B comprising primary and secondary windings each of ˜2,500 turns of 42 AWG enameled copper wire in which said windings are connected in series 1703 or in parallel 1704.
(25) FIG. 18 is an overlay of frequency response profiles for a pickup sensor coil as depicted in FIG. 10A-10B comprising a winding of ˜5,000 turns 1801 of 42 AWG enameled copper wire, a pickup sensor coil as depicted in FIG. 11A-11B comprising primary and secondary windings each of ˜2,500 turns of 42 AWG enameled copper wire in which the windings are connected in series 1802, and a two-coil pickup coil sensor as depicted in FIG. 16 comprising the pickup sensor coils represented by frequency response curves 1801 and 1802 in which the pickup coil sensors are connected in series 1803.
MODE(S) FOR CARRYING OUT THE INVENTION
(26) A first embodiment is shown schematically in FIG. 2 and depicted in cross-sectional views in FIG. 11A-11B. This embodiment comprises a primary winding 202 and a secondary winding 203 in which said primary and secondary windings are concurrently wound and fully interpenetrating and in which said primary and secondary windings are of the same or different gauge, with or without one or more ferromagnetic pole pieces, magnets, or other material in the core region.
(27) A second embodiment is shown schematically in FIG. 3 and depicted in cross-sectional views in FIG. 12A-12B. This embodiment comprises a primary winding 302 and a secondary winding 303 in which said primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins at the start of the windings and ends in the midst of the primary winding 302 and in which said primary and secondary windings are of the same or different gauge, with or without one or more ferromagnetic pole pieces, magnets, or other material in the core region.
(28) A third embodiment is shown schematically in FIG. 4 and depicted in cross-sectional views in FIG. 13A-13B. This embodiment comprises a primary winding 402 and a secondary winding 403 in which said primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins in the midst of the primary winding 402 and continues to the end of the windings and in which said primary and secondary windings are of the same or different gauge, with or without one or more ferromagnetic pole pieces, magnets, or other material in the core region.
(29) A fourth embodiment is shown schematically in FIG. 5 and depicted in cross-sectional views in FIG. 14A-14B. This embodiment comprises a primary winding 502 and a secondary winding 503 in which said primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins and ends in the midst of the primary winding 502 and in which said primary and secondary windings are of the same or different gauge, with or without one or more ferromagnetic pole pieces, magnets, or other material in the core region.
(30) A fifth embodiment is shown schematically in FIG. 6 and depicted in cross-sectional views in FIG. 15A-15B. This embodiment comprises a primary winding 602 and a secondary winding 603 in which said primary and secondary windings are concurrently wound and partially interpenetrating and in which the region of interpenetration begins in the midst of the primary winding 602 and ends in the midst of the secondary winding 603 and in which said primary and secondary windings are of the same or different gauge, with or without one or more ferromagnetic pole pieces, magnets, or other material in the core region.
(31) An additional set of five embodiments is illustrated by combination of one single-winding pickup coil sensor (as shown schematically in FIG. 1 and depicted in cross-sectional views in FIG. 10A-10B) and another coil of the type of one of the first to fifth embodiments described hereinabove to form a two-coil electromagnetic pickup of either a side-by-side or stacked configuration.
(32) An additional set of twenty-five embodiments is illustrated by the various possible combinations of one coil of the type of one of the first to fifth embodiments described hereinabove and another coil of the type of one of the first to fifth embodiments described hereinabove to form a two-coil electromagnetic pickup of either a side-by-side or stacked configuration.
(33) Embodiments described herein above comprise concurrently wound and interpenetrating coils employing two windings. However, it is apparent that concurrently wound coils comprising three or more interpenetrating windings will have additional utility in creating desirable frequency response characteristics.
(34) Embodiments described herein above comprise one or two coils. However, the usefulness of embodiments in the form of pickup coil sensors with three or more coils variously connected (or not connected) in the manners described herein above is apparent.
(35) It is generally known that a coil that serves as a sensor can be employed as a transmitter. Thus coils comprising a plurality of concurrently wound and fully or partially interpenetrating windings as described herein with their attendant characteristics have equally useful embodiments as transmitting coils. Such coils are suitable for transmission and reception of wireless signals for digital signals (such as wireless internet connections and communication between peripheral devices such as printers and cameras) and analogue signals (such as sound for wireless speakers, radio, or cochlear implants), field generation or sensing for magnetic resonance imaging, and for power transmission (such as in transformers or wireless chargers for cellular telephones and other rechargeable devices).
(36) It is understood that variations and modifications can be effected within the scope and spirit of the embodiments described hereinabove and as defined in the appended claims and their legal equivalents.
REFERENCES
(37) Slawomir Tumanski, “Induction Coil sensors—a review,” Measurement Science and Technology 18 (2007) R31-R46 Christophe Coillot and Paul Leroy (2012). Induction Magnetometers Principle, Modeling and Ways of Improvement, Magnetic Sensors—Principles and Applications, Dr Kevin Kuang (Ed.), ISBN: 978-953-51-0232-8
