US4334457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capo
Assignee: Individual
•
Filing: 1981-06-26
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Granted: 1982-06-15
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Expires: 2001-06-26
Abstract
Abstract An improved capo for fretted stringed instruments has a pressure bar with a series of threaded bores which are arranged transverse to the length of the instrument strings. Individual adjusting screws received within the bores compensate for variations in diameter of the strings. Rotatable pads on the adjusting screw lower ends remain stationary once a string is contacted while allowing the adjusting screw to continue to turn and tighten on the string.
Inventors
- 👤 Paul R. A. Spoonts, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:01
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/053
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A capo for a musical instrument of the type having a neck and strings, comprising: a pressure bar having an upper and lower surface and being adapted to extend across said neck; mounting means for removably attaching said pressure bar on said neck; an adjusting screw for each string extending through said pressure bar, each of said adjusting screws having an adjusting head accessible from said pressure bar upper surface and a lower end, the lower ends being located in a single line transverse to the lengths of the strings; a pad mounted on each of said adjusting screw lower ends, each of said pads being adapted to contact a select one of said strings; and indexing means for indexing said adjusting screws individually upward and downward with respect to the pressure bar to position each adjusting screw for depressing each string against the neck.
Claim 2
Dependent Claim
145 words
A capo for a musical instrument of the type having a neck and strings, comprising: a pressure bar having an upper and lower surface and being adapted to extend across said neck; mounting means for removably attaching said pressure bar on said neck; an adjusting screw for each string extending through said pressure bar, each of said adjusting screws having an adjusting head accessible from said pressure bar upper surface and a lower end, the lower ends being located in a single line transverse to the lengths of the strings; a pad mounted on each of said adjusting screw lower ends, each of said pads being adapted to contact a select one of said strings; and indexing means for indexing said adjusting screws individually upward and downward with respect to the pressure bar to position each adjusting screw for depressing each string against the neck.
Claim 3
Dependent Claim
18 words
The capo according to claim 1, wherein each pad will swivel with respect to the screw lower end.
Claim 4
Dependent Claim
161 words
A capo for a musical instrument of the type having a fretted neck and strings, comprising: a pressure bar having an upper and lower surface and a series of threaded bores connecting said upper and lower surfaces, said pressure bar being adapted to extend across said fretted neck so that said bores are in a line transverse to the length of said strings; mounting means for removably attaching said pressure bar on said fretted neck; an adjusting screw located in each of said threaded bores, each of said adjusting screws having an adjusting head accessible from said pressure bar upper surface and a lower end; a circular base fixed to each of said adjusting screw lower ends; and a swivel pad mounted on each of said adjusting screw bases, each of said swivel pads having a recess for rotatably receiving an adjusting screw base, said pads being adapted to contact a select one of said strings by turning said adjusting screws.
Claim 5
Dependent Claim
161 words
A capo for a musical instrument of the type having a fretted neck and strings, comprising: a pressure bar having an upper and lower surface and a series of threaded bores connecting said upper and lower surfaces, said pressure bar being adapted to extend across said fretted neck so that said bores are in a line transverse to the length of said strings; mounting means for removably attaching said pressure bar on said fretted neck; an adjusting screw located in each of said threaded bores, each of said adjusting screws having an adjusting head accessible from said pressure bar upper surface and a lower end; a circular base fixed to each of said adjusting screw lower ends; and a swivel pad mounted on each of said adjusting screw bases, each of said swivel pads having a recess for rotatably receiving an adjusting screw base, said pads being adapted to contact a select one of said strings by turning said adjusting screws.
Claim 6
Dependent Claim
35 words
The capo of claim 3, wherein said threaded bores have an upper extent of relatively greater diameter for receiving an adjusting screw head and a lower threaded extent for matingly engaging an adjusting screw thread.
Claim 7
Dependent Claim
11 words
The capo of claim 3, wherein said swivel pads are square.
Claim 8
Dependent Claim
175 words
A capo for a musical instrument of the type having a fretted neck and strings, comprising: a pressure bar having an upper and lower surfaces and a series of threaded bores connecting said upper and lower surfaces, said pressure bar being adapted to extend across said fretted neck so that said bores are in a line transverse to the length of said strings; an adjustable strap for removably attaching said pressure bar on said fretted neck; an adjusting screw located in each of said threaded bores, each of said adjusting screws having an adjusting head accessible from but normally recessed within said pressure bar upper surface and a lower end protruding from said lower surface; a circular base fixed to each of said adjusting screw lower ends; a swivel pad mounted on each of said adjusting screw bases, each of said swivel pads having a top surface with a recess for rotatably receiving an adjusting screw base and a bottom surface adapted to contact a select one of said strings by turning said adjusting screws.
Claim 9
Dependent Claim
175 words
A capo for a musical instrument of the type having a fretted neck and strings, comprising: a pressure bar having an upper and lower surfaces and a series of threaded bores connecting said upper and lower surfaces, said pressure bar being adapted to extend across said fretted neck so that said bores are in a line transverse to the length of said strings; an adjustable strap for removably attaching said pressure bar on said fretted neck; an adjusting screw located in each of said threaded bores, each of said adjusting screws having an adjusting head accessible from but normally recessed within said pressure bar upper surface and a lower end protruding from said lower surface; a circular base fixed to each of said adjusting screw lower ends; a swivel pad mounted on each of said adjusting screw bases, each of said swivel pads having a top surface with a recess for rotatably receiving an adjusting screw base and a bottom surface adapted to contact a select one of said strings by turning said adjusting screws.
Claim 10
Dependent Claim
65 words
The capo of claim 6, wherein said swivel pad top recesses have an inner bore sized to rotatably receive an adjusting screw base and wherein said recesses have a circumferential outer lip formed by said swivel pad top surface for containing said adjusting screw bases in said recesses whereby said bases can rotate in said recesses when said swivel pad bottom surfaces contact said strings.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |