US4170721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone with molded block amplifier electrostatic
Assignee: Sony Corp
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Filing: 1977-12-01
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Granted: 1979-10-09
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Expires: 1997-12-01
Abstract
Abstract A condenser microphone having an integrally molded unit with an active electronic element and a plurality of leads thereto encapsulated therein, and a backplate electrically coupled thereto via an axially adaptable connection providing improved manufacturing capabilities, and in which unidirectional and non-directional capabilities are incorporated without envelope modification.
Inventors
- 👤 Hisanori Ishibashi
- 👤 Tsuneso Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/38; H04R19/00; H04R19/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A condenser microphone comprising: a housing having an opening; diaphragm means facing said opening; a backplate assembly consisting of a backplate and insulating means for supporting said backplate in position under and adjacent said diaphragm means and having at least one acoustic cavity; separate molded block means for encapsulating an active element having electrodes and separably positioned in said housing under the backplate assembly; a recess in said backplate assembly; and mechanically deflectable connection means positioned in said recess and comprising slidingly telescoping conductive elements separably connecting one of said electrodes to said backplate with a residual resilient spring bias transversely urging said conductive elements into electrical contact.
Claim 2
Dependent Claim
108 words
A condenser microphone comprising: a housing having an opening; diaphragm means facing said opening; a backplate assembly consisting of a backplate and insulating means for supporting said backplate in position under and adjacent said diaphragm means and having at least one acoustic cavity; separate molded block means for encapsulating an active element having electrodes and separably positioned in said housing under the backplate assembly; a recess in said backplate assembly; and mechanically deflectable connection means positioned in said recess and comprising slidingly telescoping conductive elements separably connecting one of said electrodes to said backplate with a residual resilient spring bias transversely urging said conductive elements into electrical contact.
Claim 3
Dependent Claim
128 words
A condenser microphone comprising: a housing having an opening; diaphragm means facing said opening; a backplate assembly consisting of a backplate and insulating means for supporting said backplate in position under and adjacent said diaphragm means and having at least one acoustic cavity; separate molded block means for encapsulating an active element having electrodes and separably positioned under the backplate assembly; and mechanically deflectable connection means separably connecting one of said electrodes to said backplate with a residual resilient spring bias maintaining said connection; wherein said molded block is relieved to provide a communication path therethrough to said cavity; and wherein said block provides a cut portion to form said communication path, and further includes valve means in said cut portion for selectively opening or closing said path.
Claim 4
Dependent Claim
128 words
A condenser microphone comprising: a housing having an opening; diaphragm means facing said opening; a backplate assembly consisting of a backplate and insulating means for supporting said backplate in position under and adjacent said diaphragm means and having at least one acoustic cavity; separate molded block means for encapsulating an active element having electrodes and separably positioned under the backplate assembly; and mechanically deflectable connection means separably connecting one of said electrodes to said backplate with a residual resilient spring bias maintaining said connection; wherein said molded block is relieved to provide a communication path therethrough to said cavity; and wherein said block provides a cut portion to form said communication path, and further includes valve means in said cut portion for selectively opening or closing said path.
Claim 5
Dependent Claim
122 words
A condenser microphone comprising: a housing having an opening; diaphragm means facing said opening; a backplate assembly consisting of a backplate and insulating means for supporting said backplate in position under and adjacent said diaphragm means and having at least one acoustic cavity; separate molded block means for encapsulating an active element having electrodes and separably positioned under the backplate assembly; and mechanically deflectable connection means separably connecting one of said electrodes to said backplate with a residual resilient spring bias maintaining said connection; wherein said molded block is relieved to provide a communication path therethrough to said cavity; and wherein said relieved portion of said block faces an opening in said housing facing in a direction laterally of the said opening.
Claim 6
Dependent Claim
122 words
A condenser microphone comprising: a housing having an opening; diaphragm means facing said opening; a backplate assembly consisting of a backplate and insulating means for supporting said backplate in position under and adjacent said diaphragm means and having at least one acoustic cavity; separate molded block means for encapsulating an active element having electrodes and separably positioned under the backplate assembly; and mechanically deflectable connection means separably connecting one of said electrodes to said backplate with a residual resilient spring bias maintaining said connection; wherein said molded block is relieved to provide a communication path therethrough to said cavity; and wherein said relieved portion of said block faces an opening in said housing facing in a direction laterally of the said opening.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |