Patent US3922503A successfully refreshed from Google Patents.
US3922503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm for electroacoustic transducer
Assignee: Foster Electric Co Ltd
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Filing: 1975-01-02
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Granted: 1975-11-25
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Expires: 1995-01-02
Abstract
Abstract A circular diaphragm for electroacoustic transducers made of a membrane of a nonmagnetic and insulative material and having on its surface a series of substantially parallelly spaced conductors including outlet parts for connecting said conductors to external input or output terminals, and additional metal parts disposed in spaces between the conductors and the outlet parts as insulated from them. The additional parts increase the rigidity of the diaphragm and at the same time balance the weight of the circular diaphragm in all radial directions.
Inventors
- 👤 Shunichi Tabuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:02
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04; H04R9/046; H04R9/047
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A diaphragm for electroacoustic transducer comprising a circular membrane of a nonmagnetic and insulative material, and a series of conductors formed at least on a surface of said membrane, said conductors including parallel conductors and a group of outlet parts interconnecting said parallel conductors with one another and with external terminals of the transducer and a group of localized area reinforcements likewise formed on said membrance and only situated at locations of said membrane which do not contain said series of conductors and electrically insulated from said series of conductors and adapted to increase the rigidity of the diaphragm.
Claim 2
Dependent Claim
99 words
A diaphragm for electroacoustic transducer comprising a circular membrane of a nonmagnetic and insulative material, and a series of conductors formed at least on a surface of said membrane, said conductors including parallel conductors and a group of outlet parts interconnecting said parallel conductors with one another and with external terminals of the transducer and a group of localized area reinforcements likewise formed on said membrance and only situated at locations of said membrane which do not contain said series of conductors and electrically insulated from said series of conductors and adapted to increase the rigidity of the diaphragm.
Claim 3
Dependent Claim
35 words
The diaphragm according to claim 1 wherein said reinforcements are metal parts and are distributed at radially separated positions with proper dimensions so as to balance the weight distribution of the conductors in the diaphragm.
Claim 4
Dependent Claim
50 words
The diaphragm according to claim 1 wherein said parallel conductors comprise a group of substantially similarly U-shaped conductor parts sequentially arranged in inside and outside relationship substantially in the central field of the diaphragm, and said outlet parts are adapted to connect the respective said U-shaped conductor parts in series.
Claim 5
Dependent Claim
62 words
The diaphragm according to claim 1 wherein said outlet parts comprise radial outlet parts arranged substantially at regular intervals and in intermediate field between the central field and the peripheral field of the diaphragm and connected respectively at an end with the parallel conductors, and arcuate outlet parts connecting most of the other ends of said radial outlet parts with one another.
Claim 6
Dependent Claim
26 words
The diaphragm according to claim 1 wherein said reinforcements are metal parts and are arranged respectively in spaces between said parallel conductors and said outlet parts.
Claim 7
Dependent Claim
21 words
The diaphragm according to claim 4 wherein said arcuate outlet parts are arranged substantially in the peripheral field of the diaphragm.
References Cited (Backward Citations)
US3141071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |