Patent US3670299A successfully refreshed from Google Patents.
US3670299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker device for sound reproduction in liquid medium
Assignee: LTV LING ALTEC Inc
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Filing: 1970-03-25
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Granted: 1972-06-13
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Expires: 1990-03-25
Abstract
Abstract Apparatus for transducing electrical signal energy to acoustic energy for projection within liquid medium. Such speaker device consists of a sealed housing enclosure which is formed of resilient material such that it includes at least one generally planar side, and a permanent magnet cooperating with an electromagnetic drive coil are operatively disposed within said enclosure in suitable affixure to drive the planar side of the housing means so that it acts as the sound producing vibratile member in contact with the liquid medium.
Inventors
- 👤 Jay Dee C Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:19
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A device for electromagnetically reproducing acoustic energy within a liquid medium, comprising: housing means formed of resilient material for disposition in immersion in said liquid medium, said housing means forming a water-tight enclosure having at least one side of generally planar form; permanent magnet means secured within said housing means and defining a single continuous air gap which is disposed normal to and spaced from said housing means one side; electromagnetic means consisting of coil former means and voice coil means formed about one edge thereof, said coil former means being securely affixed generally centrally to said housing means one side within said housing means enclosure to extend said voice coil means into position for variable disposition within said permanent magnet means air gap; and conductor means receiving electrical energizing power and being connected to said voice coil means thereby to cause said varying disposition of said electromagnetic means and consequent movement of said housing means one side.
Claim 2
Independent Claim
158 words
A device for electromagnetically reproducing acoustic energy within a liquid medium, comprising: housing means formed of resilient material for disposition in immersion in said liquid medium, said housing means forming a water-tight enclosure having at least one side of generally planar form; permanent magnet means secured within said housing means and defining a single continuous air gap which is disposed normal to and spaced from said housing means one side; electromagnetic means consisting of coil former means and voice coil means formed about one edge thereof, said coil former means being securely affixed generally centrally to said housing means one side within said housing means enclosure to extend said voice coil means into position for variable disposition within said permanent magnet means air gap; and conductor means receiving electrical energizing power and being connected to said voice coil means thereby to cause said varying disposition of said electromagnetic means and consequent movement of said housing means one side.
Claim 3
Dependent Claim
65 words
A device as set forth in claim 1 wherein said housing means comprises: first housing enclosure of cylindrical form having one generally planar end and an open end and being unitarily formed of resilient material; and second enclosure means which is sealingly connected to close the open end of said first housing enclosure and which includes a feed-through orifice through which said conductor means passes.
Claim 4
Dependent Claim
24 words
A device as set forth in claim 1 which is further characterized in that: said housing means is formed from a resilient plastic material.
Claim 5
Dependent Claim
27 words
A device as set forth in claim 1 wherein said permanent magnet means comprises: annular magnet means including annular pole pieces which form a circular air gap.
Claim 6
Dependent Claim
42 words
A device as set forth in claim 2 which is further characterized to include: plastic sealant completely sealing across the open cylindrical end of said first enclosure means and providing sealing compaction around said conductor means as connected through said feed-through orifice.
Claim 7
Dependent Claim
88 words
A device as set forth in claim 2 which is further characterized to include: mounting panel means sealingly connected across the open end of said first enclosure means in parallel, spaced relationship to said end panel; means mounting said permanent magnet means in rigid affixure to said mounting panel means for support thereon; and waterproof sealing means disposed on the other side of said mounting panel from said permanent magnet means and completely sealing across said first enclosure open end and providing sealing contact around said conductor means.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |