Switched reversing configuration control for string instruments and boost circuit therefor

• US 9,747,882 B1
• Filed: 04/14/2017
• Issued: 08/29/2017
• Est. Priority Date: 04/14/2017
• Status: Active Grant

• Current Assignee: Petr Micek
• Original Assignee: Petr Micek
• Inventors: Micek, Petr
• Primary Examiner(s): Warren, David
• Assistant Examiner(s): Schreiber, Christina
• Application Number:
  US15/487,630
• Time in Patent Office: 137 Days
• Field of Search: 84742
• CPC Class Codes: G10H 2220/505 Dual coil electrodynamic string transducer, e.g. for humbucking, to cancel out parasitic magnetic fields
• CPC Class Codes: G10H 3/182 using two or more pick-up means for each string
• CPC Class Codes: G10H 3/186 Means for processing the signal picked up from the strings filtering G10H1/12

Abstract

A switched reversing configuration control for string instruments connects to a pair of pickup sensors located on an electric string instrument for selectively electrically configuring the pickup sensors between (a) the pair of pickup sensors being coupled with like polarity in one of series or parallel with respect to a pair of output terminals, or (b) effectively coupling only one of the pair of pickup sensors to the output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in one of series or parallel with respect to the output terminals. An optional reverse polarity passive boost circuit is provided for increasing the output voltage coupled to the output terminals when the pickup sensors are coupled with opposing polarity as compared to the output voltage that would otherwise be provided absent the reverse polarity passive boost circuit.

Claims

1. A reversing configuration control for string instruments having at least a pair of pickup sensors, comprising:

a pair of output terminals;

a respective pair of input terminals coupled to each of the pair of pickup sensors; and

a multipole switch having at least two poles, at least a pair of fixed contacts for each of said poles and at least one displaceable contact for each of said poles, said displaceable contacts being mechanically coupled together for concurrent mechanical travel thereof, at least one of said poles being coupled to one of said pair of output terminals and at least one of said displaceable contacts being coupled to one of said input terminals, said multipole switch providing selective operative coupling of the pair of pickup sensors to said output terminals responsive to a position of said displaceable contacts with respect to said mechanical travel thereof, wherein said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in one of series or parallel to said output terminals at a first position of said displaceable contacts, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in one of series or parallel to said output terminals.

2. The reversing configuration control for string instruments as recited in claim 1, where the selective operative coupling of only one of the pair of pickup sensors to said output terminals provided by said multipole switch is a position of said displaceable contacts where said displaceable contacts are electrically connected each to the other or where each said displaceable contact is connected to neither of said pair of fixed contacts of a corresponding pole.

3. The reversing configuration control for string instruments as recited in claim 2, where said one pickup sensor coupled to said output terminals is a bridge pickup coil.

4. The reversing configuration control for string instruments as recited in claim 2, where said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in series to said output terminals, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in series to said output terminals.

5. The reversing configuration control for string instruments as recited in claim 2, where said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in parallel to said output terminals, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in parallel to said output terminals.

6. The reversing configuration control for string instruments as recited in claim 2, where said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in series to said output terminals, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in parallel to said output terminals.

7. The reversing configuration control for string instruments as recited in claim 1, where at least another of said input terminals is coupled to one of said output terminals.

8. The reversing configuration control for string instruments as recited in claim 1, where the other of said displaceable contacts is coupled to said one of said pair of output terminals.

9. The reversing configuration control for string instruments as recited in claim 1, where one input terminal of each of said pair of input terminals are connected together and one of said displaceable contacts is coupled to said interconnected input terminals.

10. The reversing configuration control for string instruments as recited in claim 1, where both of said displaceable contacts are coupled to a respective one of said input terminals.

11. The reversing configuration control for string instruments as recited in claim 1, where both of said displaceable contacts are coupled to a respective one of said pair of output terminals.

12. The reversing configuration control for string instruments as recited in claim 1 further comprising a reverse polarity passive boost circuit coupled in series with one of said pickup sensors responsive to the pair of pickup sensors being selectively operatively coupled with opposing polarity in parallel to said output terminals for attenuating signals of a selected frequency band generated by the one pickup sensor coupled in series therewith.

13. The reversing configuration control for string instruments as recited in claim 12, where said reverse polarity passive boost circuit includes a capacitor.

14. The reversing configuration control for string instruments as recited in claim 13, where said reverse polarity passive boost circuit further includes at least one resistor coupled in parallel with said capacitor.

15. The reversing configuration control for string instruments as recited in claim 14, where said at least one resistor is variable resistor.

16. The reversing configuration control for string instruments as recited in claim 12, where said reverse polarity passive boost circuit includes at least one resistor.

17. The reversing configuration control for string instruments as recited in claim 16, where said at least one resistor is variable resistor.

18. The reversing configuration control for string instruments as recited in claim 1 further comprising a reverse polarity passive boost circuit coupled in parallel with one of said pickup sensors responsive to the pair of pickup sensors being selectively operatively coupled with opposing polarity in series to said output terminals for attenuating signals generated by the one pickup sensor coupled in parallel therewith.

19. The reversing configuration control for string instruments as recited in claim 18, where said reverse polarity passive boost circuit includes at least one resistor.

20. A reversing configuration control for string instruments, comprising:

a pair of pickup sensors;

a pair of output terminals;

a respective pair of input terminals coupled to each of said pair of pickup sensors; and

a multipole switch having at least two poles, at least a pair of fixed contacts for each of said poles and at least one displaceable contact for each of said poles, said displaceable contacts being mechanically coupled together for concurrent mechanical travel thereof, at least one of said poles being coupled to one of said pair of output terminals and at least one of said displaceable contacts being coupled to one of said input terminals, said multipole switch providing selective operative coupling of the pair of pickup sensors to said output terminals responsive to a position of said displaceable contacts with respect to said mechanical travel thereof, wherein said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in one of series or parallel to said output terminals at a first position of said displaceable contacts, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in one of series or parallel to said output terminals.

21. The reversing configuration control for string instruments as recited in claim 20, where said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in series to said output terminals, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in series to said output terminals.

22. The reversing configuration control for string instruments as recited in claim 20, where said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in parallel to said output terminals, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in parallel to said output terminals.

23. The reversing configuration control for string instruments as recited in claim 20, where said selective operative coupling includes (a) the pair of pickup sensors being coupled with like polarity in series to said output terminals, or (b) coupling only one of the pair of pickup sensors to said output terminals, or (c) the pair of pickup sensors being coupled with opposing polarity in parallel to said output terminals.

24. A reverse polarity passive boost circuit for increasing output signal amplitude of a string instrument having a pair of pickup sensors selectively coupled together with one having an opposing polarity with respect to the other, the boost circuit comprising:

an attenuation circuit coupled in one of series or parallel relationship with one of the pair of pickup sensors of the string instrument responsive to a polarity reversing control of the string instrument selecting the connection of the pair of pickup sensors coupled with opposing polarity in series or parallel to output terminals of the polarity reversing control, the attenuation circuit attenuating signals of a selected frequency band generated by the one pickup sensor coupled in series or parallel therewith and thereby increasing an amplitude of signals resulting from summation of signals respectively generated by the pair of pickup sensors within the selected frequency band.

25. The reversing configuration control for string instruments as recited in claim 24, where said attenuation circuit is coupled in series with one of said pickup sensors responsive to the pair of pickup sensors being selectively operatively coupled with opposing polarity in parallel to said output terminals, said attenuation circuit including a capacitor and at least one resistor coupled in parallel with said capacitor.

26. The reversing configuration control for string instruments as recited in claim 24, where said attenuation circuit is coupled in parallel with one of said pickup sensors responsive to the pair of pickup sensors being selectively operatively coupled with opposing polarity in series to said output terminals, said attenuation circuit including at least one resistor.