US4168646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-acoustically amplified drum
Assignee: Individual
•
Filing: 1978-07-24
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Granted: 1979-09-25
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Expires: 1998-07-24
Abstract
Abstract An electro-acoustically amplified drum consists of a hollow drum shell having at least one open end, a drum head spaced from the open end of said drum shell and supported thereon, and a microphone supported on and positioned within said drum shell and adapted to be connected to an external amplifier and speaker. The microphone is preferably supported in a position spaced from the wall of the drum shell to receive acoustical impulses separately from the drum head and the drum shell. The drum head may be a separate drum head supported on the drum shell in a fixed position or adjustable in relation to the spacing from the open end of the drum shell. Alternatively, the drum head may be supported on a drum shell having a plurality of apertures adjacent to the point of support, said apertures providing acoustical openings separating the drum head from the remainder of the shell which functions as a drum shell resonator.
Inventors
- 👤 Randall L. May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/146; G10D; G10D13/00; G10D13/01; G10D13/02; G10H2230/00; G10H2230/045; G10H2230/251; G10H2230/275; Y; Y10; Y10S; Y10S84/00; Y10S84/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
An electro-acoustically amplified drum comprising a hollow drum shell having at least one open end, a drum head spaced from said drum shell open end and supported on said drum shell, and an acoustical microphone supported on and positioned within said drum shell and adapted to be connected to an external amplifier and speaker, said microphone being spaced from and free from any physical connection to said drum head.
Claim 2
Dependent Claim
69 words
An electro-acoustically amplified drum comprising a hollow drum shell having at least one open end, a drum head spaced from said drum shell open end and supported on said drum shell, and an acoustical microphone supported on and positioned within said drum shell and adapted to be connected to an external amplifier and speaker, said microphone being spaced from and free from any physical connection to said drum head.
Claim 3
Dependent Claim
36 words
An amplified drum according to claim 1 in which a jack is positioned in the wall of said drum shell for connection to an external amplifier and speaker, and said microphone is connected to said jack.
Claim 4
Dependent Claim
60 words
An amplified drum according to claim 1 in which said drum head comprises a cylindrical support, a drum skin stretched over said support, and a tensioning hoop surrounding said support and tightening said drum skin thereon, and means secured to said support and to the open end of said drum shell to support said drum head in spaced relation thereto.
Claim 5
Dependent Claim
20 words
An amplified drum according to claim 3 in which said securing means supports said drum head in a fixed position.
Claim 6
Dependent Claim
27 words
An amplified drum according to claim 3 in which said securing means supports said drum head adjustably in relation to the open end of said drum shell.
Claim 7
Dependent Claim
18 words
An amplified drum according to claim 3 in which said securing means comprises at least one supporting bracket.
Claim 8
Dependent Claim
24 words
An amplified drum according to claim 3 in which said securing means is an integral part of said cylindrical support and said drum shell.
Claim 9
Dependent Claim
19 words
An amplified drum according to claim 3 including a plurality of microphones positioned and supported within said drum shell.
Claim 10
Dependent Claim
22 words
An amplified drum according to claim 3 including a drum head closing the end of said drum shell opposite said open end.
Claim 11
Dependent Claim
16 words
An amplified drum according to claim 3 in which said drum shell is non-cylindrical in shape.
Claim 12
Dependent Claim
17 words
An amplified drum according to claim 10 in which said drum shell is a timpani drum shell.
Claim 13
Dependent Claim
16 words
An amplified drum according to claim 10 in which said drum shell is conical in shape.
Claim 14
Dependent Claim
16 words
An amplified drum according to claim 10 in which said drum shell is frusto-conical in shape.
Claim 15
Dependent Claim
21 words
An amplified drum according to claim 10 in which said drum shell has an outwardly flared end opposite said open end.
Claim 16
Dependent Claim
141 words
An electro-acoustically amplified drum comprising a hollow drum shell having at least one open end, a threaded supporting rod, drum head tuning means comprising a drum head including a drum skin mounted on supporting means rotatably threaded on said rod and tension means non-rotatably mounted on one end of said rod, said drum skin being stretched over said tension means, whereby rotation of said supporting means varies the tension of the drum skin to tune the the same, means operatively securing said drum head tuning means to the open end of said drum shell with said drum skin spaced from said open end, and an acoustical microphone supported on and positioned within said drum shell and adapted to be connected to an external amplifier and speaker, said microphone being spaced from and free from any physical connection to said drum head.
Claim 17
Dependent Claim
141 words
An electro-acoustically amplified drum comprising a hollow drum shell having at least one open end, a threaded supporting rod, drum head tuning means comprising a drum head including a drum skin mounted on supporting means rotatably threaded on said rod and tension means non-rotatably mounted on one end of said rod, said drum skin being stretched over said tension means, whereby rotation of said supporting means varies the tension of the drum skin to tune the the same, means operatively securing said drum head tuning means to the open end of said drum shell with said drum skin spaced from said open end, and an acoustical microphone supported on and positioned within said drum shell and adapted to be connected to an external amplifier and speaker, said microphone being spaced from and free from any physical connection to said drum head.
Claim 18
Dependent Claim
45 words
An amplified drum according to claim 15 in which said securing means is secured to the end opposite said one end of said threaded rod and supporting means are relatively adjustable to vary the spacing of said drum skin from said drum shell open end.
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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) | 1982-09-24 | 1983-03-26 | 1983-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-24 | 1987-03-26 | 1987-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-24 | 1991-03-26 | 1991-09-25 | $7700.00 | Window Closed / Lapsed |