US4105877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic loudspeaker having elastic diaphragm spacer elements cured in situ
Assignee: Individual
•
Filing: 1977-04-25
•
Granted: 1978-08-08
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Expires: 1997-04-25
Abstract
Abstract An electrostatic loudspeaker including a diaphragm having two opposite sides and supported by a frame with rigid walls respectively spaced from the two opposite sides of the diaphragm and provided with perforations to permit air to pass therethrough. Electrodes are respectively mounted on the walls. In the space between the diaphragm and at least one of the walls or another rigid part between the walls there is provided an elastic support for the diaphragm.
Inventors
- 👤 Bernardus G. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:49
CPC Classifications
H; H04; H04R; H04R19/00; H04R7/00; H04R7/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
An electrostatic loudspeaker which includes in combination: a diaphragm having two opposite sides, a frame supporting said diaphram and provided with substantially rigid walls respectively arranged on opposite sides of and spaced from said two opposite sides of said diaphragm and provided with means for permitting air to pass therethrough, electrodes respectively mounted on said walls, and means for elastically supporting said diaphragm comprising an elastic mass interconnecting at least one of said walls and said diaphragm, wherein said elastic mass adheres to said diaphragm and does not exert pressure thereon, said elastic mass being in a state prior to the elastic mass state when located in position initially.
Claim 2
Dependent Claim
109 words
An electrostatic loudspeaker which includes in combination: a diaphragm having two opposite sides, a frame supporting said diaphram and provided with substantially rigid walls respectively arranged on opposite sides of and spaced from said two opposite sides of said diaphragm and provided with means for permitting air to pass therethrough, electrodes respectively mounted on said walls, and means for elastically supporting said diaphragm comprising an elastic mass interconnecting at least one of said walls and said diaphragm, wherein said elastic mass adheres to said diaphragm and does not exert pressure thereon, said elastic mass being in a state prior to the elastic mass state when located in position initially.
Claim 3
Dependent Claim
22 words
A loudspeaker in combination according to claim 1, in which said elastic mass is a hardened mass hardened from a putty-like mass.
Claim 4
Dependent Claim
26 words
A loudspeaker in combination according to claim 1, in which said elastic mass extends from said walls on opposite sides of said diaphragm into the latter.
Claim 5
Dependent Claim
28 words
A loudspeaker in combination according to claim 1, in which said elastic mass extends into at least some of the perforations in at least one of said walls.
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) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |