US4621171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroacoustic transducer and a method for manufacturing thereof
Assignee: Toshiba Corp
•
Filing: 1983-05-31
•
Granted: 1986-11-04
•
Expires: 2003-05-31
Abstract
Abstract An electroacoustic transducer includes a base plate made of insulating material, a stationary electrode formed on one side of the base plate and made of electrically conductive material, an annular support formed on the same side of the base plate and surrounding the stationary electrode, the annular support being made of the same electrically conductive material as the stationary electrode, and an electrically conductive diaphragm applied on the annular support.
Inventors
- 👤 Hiroto Wada
- 👤 Minoru Nishizono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:37
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/04; H04R19/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49156; Y10T29/49789; Y10T29/4979
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
An electroacoustic transducer comprising: a base plate of insulating material; a stationary electrode secured to on one side of said base plate, said stationary electrode being made of electrically conductive material; an annular support secured to on the same side of said base plate as said stationary electrode and surrounding said stationary electrode, said annular support being made of the same electrically conductive material as said stationary electrode and extending higher than said stationary electrode from said base plate; an electrically conductive diaphragm secured on said annular support and facing said stationary electrode; and an electrically conductive casing mounted on said base plate to house said stationary electrode, said annular support and said diaphragm together, said casing defining an opening facing said diaphragm.
Claim 2
Dependent Claim
123 words
An electroacoustic transducer comprising: a base plate of insulating material; a stationary electrode secured to on one side of said base plate, said stationary electrode being made of electrically conductive material; an annular support secured to on the same side of said base plate as said stationary electrode and surrounding said stationary electrode, said annular support being made of the same electrically conductive material as said stationary electrode and extending higher than said stationary electrode from said base plate; an electrically conductive diaphragm secured on said annular support and facing said stationary electrode; and an electrically conductive casing mounted on said base plate to house said stationary electrode, said annular support and said diaphragm together, said casing defining an opening facing said diaphragm.
Claim 3
Dependent Claim
100 words
An electroacoustic transducer according to claim 1, further coprising: a first terminal formed on the other side of said base plate, said first terminal being made of electrically conductive material; a first circuit means electrically connecting said stationary electrode to said first terminal and penetrating said base plate; a second terminal formed on said the other side of said base plate, said second terminal being made of the same electrically conductive material as said first terminal and said casing being electrically connected to said second terminal; and a second circuit means electrically connecting said annular support to said second terminal.
Claim 4
Dependent Claim
18 words
An electroacoustic transducer according to claim 2, wherein said second terminal is annular and surrounds said first terminal.
Claim 5
Dependent Claim
29 words
An electroacoustic transducer according to claim 3, wherein said first and second terminals are made of the same electrically conductive material as said stationary electrode and said annular support.
Claim 6
Dependent Claim
17 words
An electroacoustic transducer according to claim 4, wherein said first and second circuit means are respectively conductors.
Claim 7
Dependent Claim
16 words
An electroacoustic transducer according to claim 4, further comprising: an electret applied on said stationary electrode.
Claim 8
Dependent Claim
25 words
An electroacoustic transducer according to claim 6, wherein said first circuit means is an impedance transforming device and said second circuit means is a conductor.
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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |