US3555956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acousto-electrical transducer for wind instrument
Assignee: Baldwin Piano and Organ Co
•
Filing: 1968-08-09
•
Granted: 1971-01-19
•
Expires: 1988-08-09
Abstract
Abstract The bell of a brass wind instrument emits sound into a first enclosure providing, at the bell, a relatively small open cavity containing a microphone, the remainder of the enclosure being filled with highly absorptive acoustical material. A highly resistive or absorptive long and narrow acoustical path exists around the outside of the first enclosure, extending from the small open front cavity to a rear opening to the atmosphere, and is formed by a second enclosure spaced from and surrounding the first enclosure.
Inventors
- 👤 Daniel W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:28
CPC Classifications
G; G10; G10D; G10D9/00; G10D9/06; G10H; G10H3/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
120 words
An attachment for a brass wind instrument, comprising a housing defining a chamber closable by the rim of the instrument bell when the bell opening is connected to an opening in said housing into said chamber, a mass of acoustically absorbing material largely filling said chamber, but absent from the immediate area of attachment of said bell to said housing to define an open space directly coupled to said large mass of acoustically absorptive material, whereby said instrument radiates sound directly into said small open space and means defining a long narrow highly acoustically absorptive passage, filed with acoustically absorptive material proceeding from said small open space and surrounding said chamber and having a terminating opening to the surrounding atmosphere.
Claim 2
Dependent Claim
120 words
An attachment for a brass wind instrument, comprising a housing defining a chamber closable by the rim of the instrument bell when the bell opening is connected to an opening in said housing into said chamber, a mass of acoustically absorbing material largely filling said chamber, but absent from the immediate area of attachment of said bell to said housing to define an open space directly coupled to said large mass of acoustically absorptive material, whereby said instrument radiates sound directly into said small open space and means defining a long narrow highly acoustically absorptive passage, filed with acoustically absorptive material proceeding from said small open space and surrounding said chamber and having a terminating opening to the surrounding atmosphere.
Claim 3
Dependent Claim
16 words
The combination according to claim 1 wherein a microphone is mounted in said small open space.
Claim 4
Dependent Claim
79 words
In combination with a wind instrument having a sound emitting bell portion, a housing defining a substantially closed highly acoustically absorptive space coupled closely to said horn and capable of absorbing acoustic output from said horn, and means defining a long, narrow, highly acoustically attenuating path leading from adjacent the conjunction of said horn and said space to the surrounding atmosphere for transmitting air flow of said instrument to said surrounding atmosphere to maintain ambient pressure in said space.
Claim 5
Dependent Claim
79 words
In combination with a wind instrument having a sound emitting bell portion, a housing defining a substantially closed highly acoustically absorptive space coupled closely to said horn and capable of absorbing acoustic output from said horn, and means defining a long, narrow, highly acoustically attenuating path leading from adjacent the conjunction of said horn and said space to the surrounding atmosphere for transmitting air flow of said instrument to said surrounding atmosphere to maintain ambient pressure in said space.
Claim 6
Dependent Claim
15 words
The combination according to claim 3 wherein a microphone is mounted in said closed space.
Claim 7
Dependent Claim
16 words
The combination according to claim 3 wherein said housing is cylindrical and coaxial with said bell.
Claim 8
Dependent Claim
15 words
The combination according to claim 4 wherein said microphone is mounted coaxially of said bell.
Claim 9
Dependent Claim
23 words
The combination according to claim 5 wherein is provided a small open space within said chamber coupling said horn to said absorptive space.
Claim 10
Dependent Claim
25 words
The combination according to claim 5 wherein said narrow, highly attenuating path is defined by a cylindrical structure substantially surrounding said housing but spaced therefrom.
Claim 11
Dependent Claim
63 words
A double-walled muffler for a brass wind instrument, comprising means providing a path from said instrument to the atmosphere via the space between said walls, and a mass of acoustic attenuating material in said space, said mass of acoustic attenuating material being arranged to pass air flow from said instrument to the atmosphere at a rate to maintain ambient pressure in said space.
Claim 12
Dependent Claim
63 words
A double-walled muffler for a brass wind instrument, comprising means providing a path from said instrument to the atmosphere via the space between said walls, and a mass of acoustic attenuating material in said space, said mass of acoustic attenuating material being arranged to pass air flow from said instrument to the atmosphere at a rate to maintain ambient pressure in said space.
Claim 13
Dependent Claim
56 words
A double walled muffler for a brass wind instrument comprising spacEd apart acoustical enclosures and a mass of fibrous acoustic material in the inner one of said enclosures, and an air flow path having high acoustic impedance extending in at least one of said enclosures from the sound emitting region of the instrument to the atmosphere.
Claim 14
Dependent Claim
56 words
A double walled muffler for a brass wind instrument comprising spacEd apart acoustical enclosures and a mass of fibrous acoustic material in the inner one of said enclosures, and an air flow path having high acoustic impedance extending in at least one of said enclosures from the sound emitting region of the instrument to the atmosphere.
Claim 15
Dependent Claim
75 words
A muffler for a brass wind instrument, comprising an enclosure having an opening capable of mating with the bell of the instrument, an unencumbered region encompassed in a minor portion of said enclosure located immediately at said opening, the remainder of said enclosure being packed with fibrous acoustically attenuating material, and means defining an egress path extending from said unencumbered region for air flow from said enclosure, said egress path having a high acoustic impedance.
Claim 16
Dependent Claim
75 words
A muffler for a brass wind instrument, comprising an enclosure having an opening capable of mating with the bell of the instrument, an unencumbered region encompassed in a minor portion of said enclosure located immediately at said opening, the remainder of said enclosure being packed with fibrous acoustically attenuating material, and means defining an egress path extending from said unencumbered region for air flow from said enclosure, said egress path having a high acoustic impedance.
Claim 17
Dependent Claim
15 words
The combination according to claim 11 wherein a microphone is located in said unencumbered region.
References Cited (Backward Citations)
US1419606A
Cited
US1563586A
Cited
US2318535A
Cited
US2536261A
Cited
US2571809A
Cited
US2618191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |