US4924741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic drum with curved playing surface
Assignee: EASTERDAY LARRY
•
Filing: 1988-07-22
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Granted: 1990-05-15
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Expires: 2008-07-22
Abstract
Abstract An electronic drum has cylindrical non-planar playing surface, and a force sensing detection unit is attached to the playing surface. The force sensing detection unit converts external striking forces applied to the playing surface into electrical output pulses. The electronic drum is attached to a mount shaft assembly with a resilient portion interposed between the electronic drum and the mount shaft. The mount shaft assembly enables the electronic drum to be mounted onto various support stands.
Inventors
- 👤 Mark Vollenweider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:38
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/146; G10H2230/00; G10H2230/045; G10H2230/251; G10H2230/335; Y; Y10; Y10S; Y10S84/00; Y10S84/12; Y10S84/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
62 words
An electronic drum comprising: a rigid structure having a cylindrical non-planar playing surface, said cylindrical non-planar playing surface having a force sensing device attached to it that produces a signal when struck, and attachment means incorporated into said rigid structure for mounting said rigid structure on a support system mount shaft means wherein said mount shaft means provides adjustable optimum sticking position.
Claim 2
Dependent Claim
62 words
An electronic drum comprising: a rigid structure having a cylindrical non-planar playing surface, said cylindrical non-planar playing surface having a force sensing device attached to it that produces a signal when struck, and attachment means incorporated into said rigid structure for mounting said rigid structure on a support system mount shaft means wherein said mount shaft means provides adjustable optimum sticking position.
Claim 3
Dependent Claim
21 words
An electronic drum of claim 1 wherein said rigid structure, having a cylindrical non-planar playing surface, is a round tubular body.
Claim 4
Dependent Claim
21 words
An electronic drum of claim 1 wherein said rigid structure, having a cylindrical non-planar playing surface, is an ellipsoidal tubular body.
Claim 5
Dependent Claim
41 words
An electronic drum of claim 1 wherein said rigid structure, having a cylindrical non-planar playing surface, is a round tubular body with at least one flat portion providing surfaces in which mounting systems can be installed into said round tubular body.
Claim 6
Dependent Claim
41 words
An electronic drum of claim 1 wherein said rigid structure, having a cylindrical non-planar playing surface, is an ellipsoidal tubular body with at least one flat portion providing surfaces in which mounting systems can be installed into said ellipsoidal tubular body.
Claim 7
Dependent Claim
36 words
An electronic drum of claim 1 wherein a plurality of said rigid structures having cylindrical non-planar playing surfaces are coupled together and acoustically isolated from one another creating a multiple electronic drum with curved playing surfaces.
Claim 8
Dependent Claim
33 words
An electronic drum of claim 6 wherein soft rubber shock mounts are interposed in between said rigid structures having cylindrical non-planar playing surfaces, acoustically isolating said rigid structures with cylindrical non-planar playing surfaces.
Claim 9
Dependent Claim
24 words
An electronic drum of claim 6 wherein said multiple electronic drum with a cylindrical non-planar playing surface is attached to a mount shaft assembly.
Claim 10
Dependent Claim
42 words
An electronic drum of claim 8 wherein said multiple electronic drum with a cylindrical non-planar playing surface is attached to two or more mount shaft assemblies in order to support and balance said multiple electronic drum with a cylindrical non-planar playing surface.
Claim 11
Dependent Claim
23 words
An electronic drum of claim 1 wherein said rigid structure with a cylindrical non-planar playing surface is attached to a mount shaft assembly.
Claim 12
Dependent Claim
41 words
An electronic drum of claim 1 wherein said rigid structure, having a cylindrical non-planar playing surface, is a round tubular body with at least one flat portion providing surfaces in which phono jacks can be installed into said round tubular body.
Claim 13
Dependent Claim
41 words
An electronic drum of claim 1 wherein said rigid structure, having a cylindrical non-planar playing surface, is an ellipsoidal tubular body with at least one flat portion providing surfaces in which phono jacks can be installed into said ellipsoidal tubular body.
Claim 14
Dependent Claim
94 words
An electronic drum comprising: a rigid structure having a cylindrical non-planar playing surface, a base mount, a suspension system means interposed between said playing surface and said base mount, said cylindrical non-planar playing surface having a force sensing device attached to it that produces a signal when struck, said suspension system means for providing a fixed amount of free movement between said cylindrical non-planar playing surface and said base mount, and a recoil element is interposed between said cylindrical non-planar playing surface and said base mount occupying the entire amount of said free movement.
Claim 15
Dependent Claim
94 words
An electronic drum comprising: a rigid structure having a cylindrical non-planar playing surface, a base mount, a suspension system means interposed between said playing surface and said base mount, said cylindrical non-planar playing surface having a force sensing device attached to it that produces a signal when struck, said suspension system means for providing a fixed amount of free movement between said cylindrical non-planar playing surface and said base mount, and a recoil element is interposed between said cylindrical non-planar playing surface and said base mount occupying the entire amount of said free movement.
Claim 16
Dependent Claim
17 words
An electronic drum of claim 13 wherein said base mount is attached to a mount shaft assembly.
Claim 17
Dependent Claim
97 words
A mount shaft assembly for supporting an electronic drum with a cylindrical non-planar playing surface comprising: an inner mount shaft, an outer mount shaft sleeve, a soft resilient portion interposed between said inner mount shaft and said outer mount shaft sleeve, the inner mount shaft being attached to said playing surface structure having a cylindrical non-planar playing surface, said outer mount shaft sleeve being capable of fitting into various support mount systems, said soft resilient portion absorbing vibrations of said support mount systems, providing acoustic isolation between said inner mount shaft and said outer mount shaft sleeve.
Claim 18
Dependent Claim
97 words
A mount shaft assembly for supporting an electronic drum with a cylindrical non-planar playing surface comprising: an inner mount shaft, an outer mount shaft sleeve, a soft resilient portion interposed between said inner mount shaft and said outer mount shaft sleeve, the inner mount shaft being attached to said playing surface structure having a cylindrical non-planar playing surface, said outer mount shaft sleeve being capable of fitting into various support mount systems, said soft resilient portion absorbing vibrations of said support mount systems, providing acoustic isolation between said inner mount shaft and said outer mount shaft sleeve.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |