Patent US3760679A successfully refreshed from Google Patents.
US3760679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-transposing mute
Assignee: University of Kentucky Research Foundation
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Filing: 1972-09-06
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Granted: 1973-09-25
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Expires: 1992-09-06
Abstract
Abstract A non-transposing mute having a metallic hemispherical resonator with a hollow acoustic filter attached thereto is provided for detachably fitting upon the rim of a brass musical instrument. A variety of tonal quality is available by choice of the particular filter selected by the musician.
Inventors
- 👤 B Gossick
- 👤 K Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:11
CPC Classifications
G; G10; G10D; G10D9/00; G10D9/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A non-transposing mute for a brass musical instrument having a bell portion comprising, a generally hemispherical metallic member including a relatively small ferrule at its axis and projecting outwardly therefrom, means for detachably securing the periphery of said member closely adjacent the rim of the bell portion and with said member positioned outwardly of the bell portion, and a hollow acoustic filter detachably secured to said ferrule and projecting outwardly therefrom, said filter serving to communicate the interior of said member with the ambient air and having a decoupling aperture therein smaller than the inner diameter of said ferrule.
Claim 2
Dependent Claim
99 words
A non-transposing mute for a brass musical instrument having a bell portion comprising, a generally hemispherical metallic member including a relatively small ferrule at its axis and projecting outwardly therefrom, means for detachably securing the periphery of said member closely adjacent the rim of the bell portion and with said member positioned outwardly of the bell portion, and a hollow acoustic filter detachably secured to said ferrule and projecting outwardly therefrom, said filter serving to communicate the interior of said member with the ambient air and having a decoupling aperture therein smaller than the inner diameter of said ferrule.
Claim 3
Dependent Claim
28 words
A mute as defined in claim 1 wherein said filter includes a concave surface facing into said resonator member and leading to the entrance of said decoupling aperture.
Claim 4
Dependent Claim
13 words
A mute as defined in claim 1 substantially devoid of acoustical absorbing materials.
Claim 5
Dependent Claim
23 words
A mute as defined in claim 1 including a planar flange on said member, said flange providing a support for said securing means.
Claim 6
Dependent Claim
37 words
A mute as defined in claim 4 including a compressible gasket in contact with the rim of the bell portion and interposed between said flange and the bell portion when the mute is mounted on the instrument.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |