US3296386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic system for electrodynamic transducers
Assignee: International Standard Electric Corp
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Filing: 1964-12-29
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Granted: 1967-01-03
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Expires: 1984-12-29
Abstract
No abstract record available.
Inventors
- 👤 Fanselow Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:21
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R1/00; H04R1/20; H04R1/22; H04R1/222; H04R9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A MAGNETIC SYSTEM FOR ELECTRO-DYNAMIC TRANSDUCERS COMPRISING A CORE OF SINTERED MAGNETIC MATERIAL, A BOTTOM POLE PLATE WHICH DECREASES IN THICKNESS TOWARDS THE PERIPHERY THEREOF AND IS INTEGRAL TO SAID CORE, A TOP POLE PLATE WHICH DECREASES IN THICKNESS TOWARDS THE PERIPHERY THEREOF AND IS FABRICATED OF SINTERED MAGNETIC MATERIAL, SAID TOP POLE PLATE ASSOCIATED WITH SAID CORE TO FORM AN OPERATING AIR GAP IN SAID MAGNETIC SYSTEM, A STUD CENTRALLY ARRANGED AROUND THE AIR GAP, A BASKET-LIKE DIAPHRAGM SUPPORT ACCOMMODATED BY SAID STUD, AND AN INSET OF MAGNETIC MATERIAL LOCATED BETWEEN SAID POLE PLATES, SURROUNDING SAID CORE.
Claim 2
Dependent Claim
98 words
A MAGNETIC SYSTEM FOR ELECTRO-DYNAMIC TRANSDUCERS COMPRISING A CORE OF SINTERED MAGNETIC MATERIAL, A BOTTOM POLE PLATE WHICH DECREASES IN THICKNESS TOWARDS THE PERIPHERY THEREOF AND IS INTEGRAL TO SAID CORE, A TOP POLE PLATE WHICH DECREASES IN THICKNESS TOWARDS THE PERIPHERY THEREOF AND IS FABRICATED OF SINTERED MAGNETIC MATERIAL, SAID TOP POLE PLATE ASSOCIATED WITH SAID CORE TO FORM AN OPERATING AIR GAP IN SAID MAGNETIC SYSTEM, A STUD CENTRALLY ARRANGED AROUND THE AIR GAP, A BASKET-LIKE DIAPHRAGM SUPPORT ACCOMMODATED BY SAID STUD, AND AN INSET OF MAGNETIC MATERIAL LOCATED BETWEEN SAID POLE PLATES, SURROUNDING SAID CORE.
References Cited (Backward Citations)
US2675533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |