Patent US3791249A successfully refreshed from Google Patents.
US3791249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum
Assignee: Individual
•
Filing: 1972-09-08
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Granted: 1974-02-12
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Expires: 1992-09-08
Abstract
Abstract A drum or other musical percussion instrument made of a seamless cylindrical shell of an integral synthetic plastic, such as a methyl methacrylate resin, with a tone or sound modulator associated therewith comprising a one- or multi-part panel of similar transparent plastic material mounted for rotation about an axis parallel to a drum head and intersecting said shell with clearance therebetween and between the panel and the head, or heads, of the drum to permit adjustability of the panel into various angular positions relative to the plane of the head in order to modulate the sounds caused by playing on said head.
Inventors
- 👤 W Crowden
- 👤 R Frigo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:16
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/01; G10D13/02; G10D13/10; G10D13/22; G10D13/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
In a musical drum having a cylindrical shell and a tensioned membrane providing a complete closure for at least one end of said shell and a surface to be played on, the improvement comprising a sound modulating device within the shell, said device being comprised of a damper-like panel mounted for rotation about an axis intersecting said shell and extending parallel to said closure, the edges of said panel being sufficiently spaced from said closure and from said shell to provide clearance therebetween and permit free rotation of said panel into various angular relationships to said membrane to thereby change the pitch of said drum.
Claim 2
Dependent Claim
105 words
In a musical drum having a cylindrical shell and a tensioned membrane providing a complete closure for at least one end of said shell and a surface to be played on, the improvement comprising a sound modulating device within the shell, said device being comprised of a damper-like panel mounted for rotation about an axis intersecting said shell and extending parallel to said closure, the edges of said panel being sufficiently spaced from said closure and from said shell to provide clearance therebetween and permit free rotation of said panel into various angular relationships to said membrane to thereby change the pitch of said drum.
Claim 3
Dependent Claim
21 words
A drum as defined by claim 1, wherein said shell and said panel are both formed of a synthetic transparent plastic.
Claim 4
Dependent Claim
94 words
A musical drum comprising a seamless cylindrical shell of an integral synthetic plastic, a head closure for at least one end of said shell, and A damper-like panel mounted for rotation about an axis intersecting said shell and parallel to and sufficiently spaced from said shell that said panel can be rotated with clearance between said panel and said shell and between said panel and said head closure, said panel being adjustable into angular positions relative to said head closure to vary the pitch of the sounds caused by playing on said head closure.
Claim 5
Dependent Claim
94 words
A musical drum comprising a seamless cylindrical shell of an integral synthetic plastic, a head closure for at least one end of said shell, and A damper-like panel mounted for rotation about an axis intersecting said shell and parallel to and sufficiently spaced from said shell that said panel can be rotated with clearance between said panel and said shell and between said panel and said head closure, said panel being adjustable into angular positions relative to said head closure to vary the pitch of the sounds caused by playing on said head closure.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |