Apparatus for enhancing output of a stringed musical instrument

• US 9,704,464 B1
• Filed: 03/24/2016
• Issued: 07/11/2017
• Est. Priority Date: 03/24/2015
• Status: Active Grant

• Current Assignee: GTR NOVO LLC
• Original Assignee: GTR NOVO LLC
• Inventors: Petschulat, David J.
• Primary Examiner(s): Fletcher, Marlon
• Application Number:
  US15/080,192
• Time in Patent Office: 474 Days
• CPC Class Codes: G10H 2220/515 Staggered, i.e. two coils side by side
• CPC Class Codes: G10H 2220/525 Piezoelectric transducers for vibration sensing or vibration excitation in the audio range; Piezoelectric strain sensing, e.g. as key velocity sensor; Piezoelectric actuators, e.g. key actuation in response to a control voltage
• CPC Class Codes: G10H 3/181 Details of pick-up assemblies
• CPC Class Codes: G10H 3/182 using two or more pick-up means for each string
• CPC Class Codes: G10H 3/183 in which the position of the pick-up means is adjustable
• CPC Class Codes: G10H 3/185 in which the tones are picked up through the bridge structure
• CPC Class Codes: G10H 3/186 Means for processing the signal picked up from the strings filtering G10H1/12

Abstract

An apparatus for enhancing the output of a stringed musical instrument having a plurality of offset substantially parallel strings, the apparatus comprising a pickup assembly having tapered poles so as to incrementally vary the relative volume of adjacent strings.

Claims

1. An apparatus for enhancing the output of a stringed musical instrument having a plurality of offset substantially parallel strings, the apparatus comprising a pickup assembly having at least one set of tapered poles so as to incrementally vary the relative volume of adjacent strings as by the tapered poles being configured relative to associated strings of the plurality of strings in a descending array toward center strings of the plurality of strings, the pickup assembly further having at least one set of non-tapered poles configured so as to produce substantially the same volume from adjacent strings, wherein:

at least one of the tapered and non-tapered sets of poles is a full set having a pole associated with each of the plurality of strings; and

at least one of the tapered and non-tapered sets of poles is a partial set having a pole associated with each of a subset of the plurality of strings, the subset being fewer than the plurality of strings but at least two strings.

2. The apparatus of claim 1 wherein:

the non-tapered poles define the full set and are positioned within at least one full coil configured to have one pole associated with each of the plurality of strings; and

the tapered poles define the partial set and are positioned within at least one partial coil configured to have one pole associated with each of the subset of the plurality of strings.

3. The apparatus of claim 2 wherein the full coil and the partial coil are mounted on a single assembly plate.

4. The apparatus of claim 3 wherein the partial coil is removably mounted on the assembly plate so as to be replaceable.

5. The apparatus of claim 4 wherein a non-coil cover is mounted in place of the partial coil.

6. The apparatus of claim 2 wherein the full coil and the partial coil are configured having independent outputs.

7. The apparatus of claim 6 wherein the partial coil output is configured with a dedicated partial coil switch.

8. The apparatus of claim 2 wherein the full coil is curved so as to increase the overall effective coil length thereof.

9. The apparatus of claim 8 wherein the partial coil is configured to nest immediately adjacent to the full coil.

10. The apparatus of claim 2 wherein:

the full coil is configured having a top plate; and

the pickup assembly further comprises a stabilizer configured to stabilize the top plate relative to an assembly plate on which the full coil is mounted.

11. The apparatus of claim 1 wherein the tapered poles are tapered by physically setting the heights of pole pieces defining the poles in the descending array.

12. The apparatus of claim 11 wherein the heights of the pole pieces are fixed.

13. The apparatus of claim 11 wherein the heights of the pole pieces are adjustable.

14. The apparatus of claim 13 wherein the pickup assembly further comprises an adjustment means selected from the group consisting of a riser bar, a set screw, a rocker bar, and any combination thereof.

15. The apparatus of claim 1 wherein the tapered poles are tapered by adjusting the output volumes of piezo crystal elements installed within a bridge of the stringed musical instrument so as to be associated with the plurality of strings and define the pickup assembly and the related tapered poles in the descending array as through a potentiometer.

16. The apparatus of claim 1 wherein the tapered poles are tapered by selecting a subset of frequencies through a capacitor and adjusting the amount of frequency filtering as through a connected potentiometer.

17. The apparatus of claim 1 wherein the tapered poles are positioned within a single pickup assembly comprising first and second partial coils each configured to have one pole associated with each of a respective first and second subset of the plurality of strings, the first and second subsets each being fewer than the plurality of strings but at least two strings.

18. The apparatus of claim 1 comprising multiple pickup assemblies, at least one such pickup assembly having tapered poles.

19. The apparatus of claim 18 comprising a first pickup assembly comprising a first full coil having first non-tapered poles associated with each of the plurality of strings and a first partial coil having first tapered poles associated with each of a first subset of the plurality of strings, the first subset being fewer than the plurality of strings but at least two strings.

20. The apparatus of claim 19 further comprising a second pickup assembly comprising a second full coil having second non-tapered poles associated with each of the plurality of strings and a second partial coil having second tapered poles associated with each of a second subset of the plurality of strings, the second subset being fewer than the plurality of strings but at least two strings.

21. The apparatus of claim 20 wherein the first full coil and the second partial coil are connected and the second full coil and the first partial coil are connected.

22. The apparatus of claim 20 wherein the first partial coil and the second partial coil are connected separately through a respective first partial coil switch and second partial coil switch and the first full coil and the second full coil are connected commonly through a single full coil switch.

23. The apparatus of claim 22 wherein the first partial coil switch, the second partial coil switch, and the full coil switch are all connected to a single output jack.

24. The apparatus of claim 22 wherein the first partial coil switch is connected to a dedicated first partial coil output jack, the second partial coil switch is connected to a dedicated second partial coil output jack, and the full coil switch is connected to a dedicated full coil output jack.

25. The apparatus of claim 20 wherein the first and second subsets of the plurality of strings are different.

26. The apparatus of claim 20 wherein the first pickup assembly is located near a bridge of the stringed musical instrument and the second pickup assembly is located near a neck of the stringed musical instrument.

27. The apparatus of claim 19 wherein the first pickup assembly further comprises an additional first partial coil, wherein the first subsets of the plurality of strings of the respective first partial coils are different.

28. The apparatus of claim 19 further comprising a second pickup assembly and a separate third pickup assembly.

29. The apparatus of claim 28 wherein:

the second pickup assembly comprises at least two second coils; and

the third pickup assembly comprises at least one third coil.

30. The apparatus of claim 29 wherein the second and third coils are full coils having respective second and third non-tapered poles associated with each of the plurality of strings.

31. The apparatus of claim 1 wherein:

the tapered poles define the full set and are positioned within at least one full coil configured to have at least one pole associated with each of the plurality of strings; and

the non-tapered poles define the partial set and are positioned within at least one partial coil configured to have one pole associated with each of the subset of the plurality of strings.

32. The apparatus of claim 31 wherein:

the full coil and the partial coil are configured having independent outputs; and

the partial coil output is configured with a dedicated partial coil switch.

33. An apparatus for enhancing the output of a stringed musical instrument having a plurality of offset substantially parallel strings and at least one pickup assembly comprising at least one set of tapered poles and at least one set of non-tapered poles, the non-tapered poles configured so as to produce substantially the same volume from the plurality of strings and the tapered poles configured so as to incrementally vary the relative volume of a subset of the plurality of strings in a descending array, at least one of the sets of tapered and non-tapered poles being positioned within a curved full coil so as to increase the overall effective coil length thereof.

34. An apparatus for enhancing the output of a stringed musical instrument having a plurality of offset substantially parallel strings, the apparatus comprising:

a first pickup assembly comprising a first full coil having first non-tapered poles associated with each of the plurality of strings and a first partial coil having first tapered poles associated with each of a first subset of the plurality of strings, the first subset being fewer than the plurality of strings but at least two strings; and

a second pickup assembly comprising a second full coil having second non-tapered poles associated with each of the plurality of strings and a second partial coil having second tapered poles associated with each of a second subset of the plurality of strings, the second subset being fewer than the plurality of strings but at least two strings, wherein the first and second subsets of the plurality of strings are different, and further wherein;

the first and second non-tapered poles of the respective first and second full coils are configured so as to produce substantially the same volume from adjacent strings of the plurality of strings; and

the first and second tapered poles of the respective first and second partial coils are configured so as to incrementally vary the relative volume of adjacent strings as by each of the tapered poles being configured relative to the respective first and second subsets of the plurality of strings in a descending array toward center strings of the plurality of strings.