Patent US3693490A successfully refreshed from Google Patents.
US3693490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stringed instruments with adjustable frictional gripping means for the string supporting pins
Assignee: Individual
•
Filing: 1969-05-21
•
Granted: 1972-09-26
•
Expires: 1989-05-21
Abstract
Abstract A stringed instrument with tuning pins to retain the strings, in which said tuning pins are mounted in a split wrest block with the pins positioned between the abutting block section and a bolt mounted to retain said block sections in a compressed relationship and to further provide a tight frictional setting for said tuning pins when they have been tuned.
Inventors
- 👤 Nathaniel W Raphael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:07
CPC Classifications
G; G10; G10C; G10C3/00; G10C3/10; G10C3/106
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A stringed instrument which includes a frame, wrest block and tuning pins, said wrest block provided with a plurality of divided segments, mounted apertures for tuning pins located between segments, said tuning pins mounted in said apertures, an adjustable clamping means to produce a compressional stress on all divided segments to draw them together and increase the frictional grip of said wrest block on each tuning pin.
Claim 2
Dependent Claim
67 words
A stringed instrument which includes a frame, wrest block and tuning pins, said wrest block provided with a plurality of divided segments, mounted apertures for tuning pins located between segments, said tuning pins mounted in said apertures, an adjustable clamping means to produce a compressional stress on all divided segments to draw them together and increase the frictional grip of said wrest block on each tuning pin.
Claim 3
Dependent Claim
35 words
In a device according to claim 1 in which said wrest block is comprised of a plurality of abutting individual sections that are retained by said frame as a single wrest block with divided segments.
Claim 4
Dependent Claim
23 words
In a device according to claim 1 in which said wrest block is comprised of a single slotted block to form divided segments.
Claim 5
Dependent Claim
53 words
In a device according to claim 1 in which said wrest block is comprised of a material that will distort under compression and in which said slotted block allows a greater degree of distortion under compression and a greater degree of frictional grip on each tuning pin than the conventional unitary wrest block.
Claim 6
Dependent Claim
21 words
In a device according to claim 1 in which said adjustable clamping means is a U-bolt supported by the instrument frame.
Claim 7
Dependent Claim
70 words
In a device according to claim 1 in which said adjustable clamping means is a plurality of threaded bolts, each bolt threadably mounted in a separate threaded aperture in said frame and the end of each bolt bearing upon one face of said wrest block, said bolts threadably movable to increase the compressional force on said slotted wrest block to in turn increase the frictional grip upon each tuning pin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |