US3073916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast-proof water-proof loudspeaker
Assignee: MUTER CO
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Filing: 1958-11-24
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Granted: 1963-01-15
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Expires: 1978-11-24
Abstract
No abstract record available.
Inventors
- 👤 Philip B Williams
- 👤 Harry E Allen
- 👤 Charles R Hohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:47
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R9/02; H04R9/04; H04R9/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A BLAST-PROOF WATER-PROOF LOUDSPEAKER COMPRISING A FIELD MAGNET DEFINING A MAGNETIC GAP AND A DIAPHRAGMSUPPORTING FRAME MOUNTED ON SAID MAGNET, AN ELASTOMETRIC VOICE COIL CENTERING BODY POSITIONED WITHIN AND SUBSTANTIALLY FILLING SAID MAGNETIC GAP, SAID CENTERING BODY SUPPORTED BY AND HAVING A PORTION THEREOF MAINTAINED IN FIXED RELATIONSHIP WITH SAID FIELD MAGNET, A VOICE COIL BOBBIN, A VOICE COIL MOUNTED ON SAID BOBBIN CENTRALLY POSITIONED WITHIN SAID MAGNETIC GAP AND SUBSTANTIALLY EMBEDDED AND SEALED WITHIN SAID ELASTOMERIC CENTERING BODY, A CONICAL DIAPHRAGM AFFIXED AT THE THROAT THEREOF TO SAID BOTTOM AND CLAMPED AT ITS PERIPHERY TO SAID FRAME, BOTH THE FRONT AND BACK SURFACES OF SAID DIAPHRAGM BEING EXPOSED TO AMBIENT ATMOSPHERE, AND A WEB INTERGRAL WITH SAID CENTERING BODY DEFINING A TRANSVERSE PARTITION ADAPTED TO SEAL SAID BOBBIN AGAINST THE PASSAGE OF FLUID THERETHROUGH.
Claim 2
Dependent Claim
135 words
A BLAST-PROOF WATER-PROOF LOUDSPEAKER COMPRISING A FIELD MAGNET DEFINING A MAGNETIC GAP AND A DIAPHRAGMSUPPORTING FRAME MOUNTED ON SAID MAGNET, AN ELASTOMETRIC VOICE COIL CENTERING BODY POSITIONED WITHIN AND SUBSTANTIALLY FILLING SAID MAGNETIC GAP, SAID CENTERING BODY SUPPORTED BY AND HAVING A PORTION THEREOF MAINTAINED IN FIXED RELATIONSHIP WITH SAID FIELD MAGNET, A VOICE COIL BOBBIN, A VOICE COIL MOUNTED ON SAID BOBBIN CENTRALLY POSITIONED WITHIN SAID MAGNETIC GAP AND SUBSTANTIALLY EMBEDDED AND SEALED WITHIN SAID ELASTOMERIC CENTERING BODY, A CONICAL DIAPHRAGM AFFIXED AT THE THROAT THEREOF TO SAID BOTTOM AND CLAMPED AT ITS PERIPHERY TO SAID FRAME, BOTH THE FRONT AND BACK SURFACES OF SAID DIAPHRAGM BEING EXPOSED TO AMBIENT ATMOSPHERE, AND A WEB INTERGRAL WITH SAID CENTERING BODY DEFINING A TRANSVERSE PARTITION ADAPTED TO SEAL SAID BOBBIN AGAINST THE PASSAGE OF FLUID THERETHROUGH.
References Cited (Backward Citations)
US2404784A
Cited
FR1126904A
Cited
DE899674C
Cited
US2755343A
Cited
US2648837A
Cited
FR1136866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |