Patent US1519919A successfully refreshed from Google Patents.
Patent US3731267A successfully refreshed from Google Patents.
US3731267A
Expired / Lapsed
US
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Electro-acoustic transducer
Assignee: Individual
•
Filing: 1971-01-04
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Granted: 1973-05-01
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Expires: 1991-01-04
Abstract
Abstract An electro-acoustic transducer comprises an enclosure of closed form containing a plurality of piezo-electric motors, each connected to the enclosure to excite the same, the motors having no mechanical connection between one another capable of transmitting static or dynamic forces. The transducer has two acoustic frequency ranges which are independent of the value of the static pressure prevailing on the outside of the transducer, one frequency range being due to the resonance of the envelope, and the other to the resonance of the motors.
Inventors
- 👤 O Brandt
- 👤 B Tocquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:48
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
An electro-acoustic transducer for producing or receiving acoustic vibrations in deep water, said transducer comprising a rigid, closed, envelope filled with air, and at least one electro-acoustic motor disposed in the interior of said envelope, said motor having a characteristic resonance frequency fm, and being mechanically connected in vibration-transmitting manner to at least a part of said envelope whose characteristic resonance frequency is fa, said transducer having two acoustic resonance frequencies f1 and f2 different from fa and fm.
Claim 2
Dependent Claim
79 words
An electro-acoustic transducer for producing or receiving acoustic vibrations in deep water, said transducer comprising a rigid, closed, envelope filled with air, and at least one electro-acoustic motor disposed in the interior of said envelope, said motor having a characteristic resonance frequency fm, and being mechanically connected in vibration-transmitting manner to at least a part of said envelope whose characteristic resonance frequency is fa, said transducer having two acoustic resonance frequencies f1 and f2 different from fa and fm.
Claim 3
Dependent Claim
29 words
An electro-acoustic transducer according to claim 1 in which the frequency fa is lower than fm and f1 is lower than fa, f2 being in the vicinity of fm.
Claim 4
Dependent Claim
101 words
An electro-acoustic transducer as claimed in claim 1 wherein the envelope comprises a ring closed by two rigid covers and, in the interior of said envelope, a plurality of said electro-acoustic motors each having an axis of revolution, said motors being secured to the internal face of said ring in vibration-transmitting manner, each said axis being disposed radially and said motors comprising piezo-electric rings and a counter-weight placed at the end of each motor nearer the center of the ring, said counter-weights being shaped in the form of conical tips so that the motors can be placed in spaced apart relationship.
References Cited (Backward Citations)
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |