US4570521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument with string-simulating switches
Assignee: Individual
•
Filing: 1984-03-30
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Granted: 1986-02-18
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Expires: 2004-03-30
Abstract
Abstract An electronic musical instrument includes a fingerboard having a plurality of switches which are player-actuated to produce musical tones through electronic tone-generating means. The fingerboard, which is on an elongate neck, has, underneath its exterior surface, one or more rows of cavities, each cavity containing a pressure-actuable membrane switch. The surface of the fingerboard above each cavity is flexible, and each switch is closeable in response to a localized deformation of the flexible fingerboard area above the cavity in which the switch is located. A continuous flexible bar is situated on the fingerboard above each row of cavity enclosed switches. Pressure applied to the bar by a player at a location above a selected cavity results in a localized deformation of both the bar and the underlying fingerboard, thereby transmitting sufficient pressure to the switch in the selected cavity to close it. The deformation is sufficiently localized to result in the closing of only one selected switch. The resilience of the bar and the fingerboard causes the switch to reopen upon release of the pressure on the bar.
Inventors
- 👤 Jeffrey Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/32; G10H1/34; G10H1/342; G10H2230/00; G10H2230/045; G10H2230/075; G10H2230/135; G10H2230/145; Y; Y10; Y10S; Y10S84/00; Y10S84/30
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
144 words
In an electronic musical instrument, of the type having a body, a neck extending from the body, a fingerboard on said neck, and a player-actuable switching mechanism in said neck for producing selected musical tones through electronic tone-generating means, an improved switching mechanism comprising: a plurality of separate, pressure-actuable switches arranged in a longitudinal row in said neck underneath the external surface of said fingerboard, each of said switches comprising a discrete pair of opposed conductive contacts; and an elongate, continuous, flexible bar disposed on said fingerboard above said row of switches; whereby the application of pressure to said bar at a location over a selected one of said switches results in a localized deformation in said bar and the underlying fingerboard, thereby transmitting the pressure to the selected switch, so that said selected switch is actuated by the pressure applied to said bar.
Claim 2
Dependent Claim
144 words
In an electronic musical instrument, of the type having a body, a neck extending from the body, a fingerboard on said neck, and a player-actuable switching mechanism in said neck for producing selected musical tones through electronic tone-generating means, an improved switching mechanism comprising: a plurality of separate, pressure-actuable switches arranged in a longitudinal row in said neck underneath the external surface of said fingerboard, each of said switches comprising a discrete pair of opposed conductive contacts; and an elongate, continuous, flexible bar disposed on said fingerboard above said row of switches; whereby the application of pressure to said bar at a location over a selected one of said switches results in a localized deformation in said bar and the underlying fingerboard, thereby transmitting the pressure to the selected switch, so that said selected switch is actuated by the pressure applied to said bar.
Claim 3
Dependent Claim
45 words
The switching mechanism of claim 1, wherein each of said switches is a membrane switch comprising a pair of planar contacts separated by a narrow gap, and wherein each of said switches is located in a cavity within said fingerboard underneath the external surface thereof.
Claim 4
Dependent Claim
29 words
The switching mechanism of claim 2, wherein said fingerboard includes a plurality of spaced-apart, transversely-extending frets thereon, each fret having a gap for the passage therethrough of said bar.
Claim 5
Dependent Claim
38 words
The switching mechanism of claim 3, wherein the contacts of each of said switches are elongated so as to underlie substantially more than one-half of that portion of said bar which extends between a pair of adjacent frets.
Claim 6
Dependent Claim
83 words
The switching mechanism of claim 1, wherein said plurality of switches is a first plurality arranged in a first row and said bar is a first bar, said switching mechanism further comprising: at least a second plurality of separate, pressure-actuable switches arranged in a second longitudinal row in said neck underneath the external surface of said fingerboard and substantially parallel to said first row; and at least a second elongate, continuous, flexible bar disposed on said fingerboard above said second row of switches.
Claim 7
Dependent Claim
14 words
The switching mechanism of claim 1, wherein said bar has a curved exterior surface.
Claim 8
Dependent Claim
16 words
The switching mechanism of claim 2, wherein said fingerboard is made of an electrically insulative material.
Claim 9
Dependent Claim
31 words
The switching mechanism of claim 1, wherein the deformation of said bar and the underlying fingerboard is sufficiently localized to actuate only a single switch by the transmission of pressure thereto.
Claim 10
Dependent Claim
19 words
The switching mechanism of claim 2, wherein said fingerboard is deformable substantially only in the areas overlying said cavities.
Claim 11
Dependent Claim
27 words
The switching mechanism of claim 9, wherein said localized deformation closes the gap between the contacts of only the switch in the cavity underlying said localized deformation.
Claim 12
Dependent Claim
167 words
In an electronic musical instrument, of the type having a body, a neck extending from the body, a fingerboard on said neck, and a player-actuable switching mechanism in said neck for producing selected musical tones through electronic tone-generating means, an improved switching mechanism, comprising: a plurality of individual cavities arranged in a longitudinal row in said fingerboard underneath the external surface thereof, said fingerboard being deformable in a flexible area above each of said cavities; a plurality of separate, pressure-actuable switches, each disposed in one of said cavities, each switch adapted to be separately closed in response to the localized deformation of said fingerboard in one of said flexible areas; and an elongate, continuous, flexible bar disposed on said fingerboard above said row of cavities; whereby the application of pressure to said bar at a location above a selected one of said cavities results in a localized deformation of said fingerboard in the flexible area above said selected cavity, thereby closing the switch in said selected cavity.
Claim 13
Dependent Claim
167 words
In an electronic musical instrument, of the type having a body, a neck extending from the body, a fingerboard on said neck, and a player-actuable switching mechanism in said neck for producing selected musical tones through electronic tone-generating means, an improved switching mechanism, comprising: a plurality of individual cavities arranged in a longitudinal row in said fingerboard underneath the external surface thereof, said fingerboard being deformable in a flexible area above each of said cavities; a plurality of separate, pressure-actuable switches, each disposed in one of said cavities, each switch adapted to be separately closed in response to the localized deformation of said fingerboard in one of said flexible areas; and an elongate, continuous, flexible bar disposed on said fingerboard above said row of cavities; whereby the application of pressure to said bar at a location above a selected one of said cavities results in a localized deformation of said fingerboard in the flexible area above said selected cavity, thereby closing the switch in said selected cavity.
Claim 14
Dependent Claim
38 words
The switching mechanism of claim 11, wherein each of said switches is a membrane switch comprising a discrete pair of planar conductive contacts separated by a narrow gap, said gap being closeable in response to said localized deformation.
Claim 15
Dependent Claim
29 words
The switching mechanism of claim 11, wherein said fingerboard includes a plurality of spaced-apart, transversely-extending frets thereon, each fret having a gap for the passage of said bar therethrough.
Claim 16
Dependent Claim
60 words
The switching mechanism of claim 13, wherein each of said switches comprises a pair of planar conductive contacts, vertically separated by a narrow gap, said gap being closeable in response to said localized deformation, said contacts being elongated-longitudinally so as to underlie substantially more than one-half of that portion of said bar which extends between a pair of adjacent frets.
Claim 17
Dependent Claim
22 words
The switching mechanism of claim 11, wherein only the switch in said selected cavity is closed in response to said localized deformation.
Claim 18
Dependent Claim
14 words
The switching mechanism of claim 11, wherein said bar has a curved exterior surface.
Claim 19
Dependent Claim
16 words
The switching mechanism of claim 11, wherein said fingerboard is made of an electrically insulative material.
Claim 20
Dependent Claim
13 words
The switching mechanism of claim 11, further comprising a circuitboard underlying said fingerboard.
Claim 21
Dependent Claim
176 words
In an electronic musical instrument of the type having a body and a player-actuable switching mechanism for producing selected musical tones through electronic tone-generating means, an improved switching mechanism, comprising: a fingerboard of electrically-insulative material attached to said body and having a plurality of individual cavities arranged in a longitudinal row underneath the external surface thereof, said fingerboard being deformable in a flexible area above each of said cavities; a plurality of separate, pressure-actuable switches, each disposed in one of said cavities, each of said switches being adapted to be separately closed in response to the localized deformation of said fingerboard in one of said flexible areas; and an elongate, continuous, flexible bar disposed on said fingerboard above said row of cavities; whereby the application of pressure to said bar at a location above a selected one of said cavities results in a localized resilient deformation of said bar and the underlying flexible area, thereby closing the switch in said selected cavity, said deformation being sufficiently localized to close only the switch in said selected cavity.
Claim 22
Dependent Claim
176 words
In an electronic musical instrument of the type having a body and a player-actuable switching mechanism for producing selected musical tones through electronic tone-generating means, an improved switching mechanism, comprising: a fingerboard of electrically-insulative material attached to said body and having a plurality of individual cavities arranged in a longitudinal row underneath the external surface thereof, said fingerboard being deformable in a flexible area above each of said cavities; a plurality of separate, pressure-actuable switches, each disposed in one of said cavities, each of said switches being adapted to be separately closed in response to the localized deformation of said fingerboard in one of said flexible areas; and an elongate, continuous, flexible bar disposed on said fingerboard above said row of cavities; whereby the application of pressure to said bar at a location above a selected one of said cavities results in a localized resilient deformation of said bar and the underlying flexible area, thereby closing the switch in said selected cavity, said deformation being sufficiently localized to close only the switch in said selected cavity.
Claim 23
Dependent Claim
86 words
The switching mechanism of claim 19, wherein said fingerboard includes a plurality of spaced-apart, transversely-extending ridges thereon, each of said ridges having means for the passage of said bar therethrough, and wherein each of said switches comprises a pair of planar conductive contacts separated by a narrow vertical gap, said gap being closeable in response to said localized deformation, said contacts being elongated longitudinally so as to underlie substantially more than one-half of that portion of said bar which extends between a pair of adjacent ridges.
References Cited (Backward Citations)
US31019A
Cited
US3340343A
Cited
US3555166A
Cited
US3662641A
Cited
US3830991A
Cited
US4035645A
Cited
US4078464A
Cited
US4126070A
Cited
US4235141A
Cited
US4339979A
Cited
USRE31019E
Cited
US4352310A
Cited
US4455465A
Cited
US4497989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |