Patent US3567870A successfully refreshed from Google Patents.
US3567870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall surface transducer system
Assignee: Individual
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Filing: 1968-07-25
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Granted: 1971-03-02
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Expires: 1988-07-25
Abstract
Abstract A transducer assembly for mounting on a wall surface or other surface for converting electrical energy to sound or vice versa. The invention is an improvement on prior art devices of similar character in providing improvement in frequency response and truer sound reproduction. The improvement comprising a housing formed from two cup-shaped members whose edges of peripheral joinment are curved surfaces, the curvature of said surfaces being identical, equal, and complementary to each other. Consult the specification for other features and details of the invention.
Inventors
- 👤 Benigno A Rivera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:18
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R9/066
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
In a surface-mounted transducer device wherein an annular magnet assembly has positioned for axial movement in an annular air gap therein a coil adapted to be connected to electrical terminals, and a housing having a first cup-shaped member to which said annular magnet assembly is secured and the second cupshaped member to which said coil is secured, said cup-shaped members having substantially flat planar parallel surfaces, said cup-shaped members being joined along the peripheral edges thereof, said second cup-shaped member having a single securement point coaxial with said coil and spaced from the outer surface of said second cup member and secured to an engaging transducer mounting surface, the improvement comprising surfaces of said cup-shaped members leading to said edges of peripheral joinment being curved surfaces, the curvature of said surfaces being identical, equal and complementary to each other.
Claim 2
Dependent Claim
139 words
In a surface-mounted transducer device wherein an annular magnet assembly has positioned for axial movement in an annular air gap therein a coil adapted to be connected to electrical terminals, and a housing having a first cup-shaped member to which said annular magnet assembly is secured and the second cupshaped member to which said coil is secured, said cup-shaped members having substantially flat planar parallel surfaces, said cup-shaped members being joined along the peripheral edges thereof, said second cup-shaped member having a single securement point coaxial with said coil and spaced from the outer surface of said second cup member and secured to an engaging transducer mounting surface, the improvement comprising surfaces of said cup-shaped members leading to said edges of peripheral joinment being curved surfaces, the curvature of said surfaces being identical, equal and complementary to each other.
Claim 3
Dependent Claim
23 words
The invention defined in claim 1, wherein the radius curvature of said surfaces is about a fixed axis common to both said surfaces.
Claim 4
Dependent Claim
30 words
The invention defined in claim 2, wherein the radius of curvature of both surfaces is about a common fixed surface and surfaces formed thereby having a common axis of revolution.
Claim 5
Dependent Claim
25 words
The invention defined in claim 1, wherein the saiD cup-shaped members have gradually increasing thicknesses along said curved surface portions to said point of joinment.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |