US3086182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical frequency filters
Assignee: Telefunken AG
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Filing: 1957-10-31
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Granted: 1963-04-16
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Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Borner Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:52
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
A MECHANICAL FILTER COMPRISING A PLURALITY OF CYLINDRICAL RESONATOR ELEMENTS ADAPTED TO VIBRATE IN A TORSIONAL MODE, SAID CYLINDRICAL RESONATOR ELEMENTS BEING DISPOSED WITH THEIR AXES IN MUTUALLY SPACED PARALLEL RELATION; AT LEAST TWO COUPLING WIRES DISPOSED ACROSS SAID CYLINDRICAL RESONATOR ELEMENTS IN DIRECTIONS SUBSTANTIALLY NORMAL TO THEIR AXES AND EACH WIRE BEING FASTENED TO A RESPECTIVE END OF EACH OF THE RESONATOR ELEMENTS TO FORM A LADDERLIKE STRUCTURE, SAID WIRES CONSTITUTING MEANS FOR SUSPENDING SAID RESONATOR ELEMENTS IN SUCH A MANNER THAT EACH RESONATOR ELEMENT VIBRATES IN A TORSIONAL MODE AS A SINGLE UNIT, SAID WIRES BEING OSCILLATORY IN A LONGITUDINAL MODE WHEREIN LONGITUDINAL OSCILLATION OF THE WIRES CORRESPONDS WITH TORSIONAL OSCILLATION OF SAID RESONATOR ELEMENTS.
References Cited (Backward Citations)
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Cited
US2615981A
Cited
US2736824A
Cited
US2799832A
Cited
US2810888A
Cited
US2856588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |