US3577180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical filter
Assignee: Siemens AG
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Filing: 1968-05-01
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Granted: 1971-05-04
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Expires: 1988-05-01
Abstract
Abstract An electromechanical filter utilizing a plurality of rods mounted on a base plate parallel to each other and having one side of each resonator flattened or coupled together by a driving rod. Input and output electromechanical transducers are provided and a second rod is connected to certain of said resonators to eliminate undesired frequency characteristics.
Inventors
- 👤 Hans Albsmeier
- 👤 Karl Traub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:51
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
An electromechanical filter comprising: a plurality of resonating elements of generally cylindrical shape and having one side flattened mounted parallel to each other, input and output means comprising a plurality of relatively short cylindrical portions of electrostrictive material formed with one side flattened, a plurality of electrostrictive members joining said plurality of short cylindrical portions, and means coupling said input and output means to said plurality of resonating elements.
Claim 2
Dependent Claim
69 words
An electromechanical filter comprising: a plurality of resonating elements of generally cylindrical shape and having one side flattened mounted parallel to each other, input and output means comprising a plurality of relatively short cylindrical portions of electrostrictive material formed with one side flattened, a plurality of electrostrictive members joining said plurality of short cylindrical portions, and means coupling said input and output means to said plurality of resonating elements.
Claim 3
Dependent Claim
24 words
An electromechanical filter according to claim 1 comprising a secondary coupling means attached to certain of said resonating elements to improve the frequency response.
Claim 4
Dependent Claim
25 words
An electromechanical filter according to claim 2 wherein said secondary coupling means comprises a rod attached to the surface of certain of said resonating elements.
Claim 5
Dependent Claim
55 words
An electromechanical filter according to claim 1 wherein said electrostrictive members are attached to said cylindrical portions on opposite sides of their longitudinal axis and the electrostrictive members on one side of said axis are polarized in a first direction and those on the other side of said axis are polarized in the opposite direction.
Claim 6
Dependent Claim
67 words
An electromechanical filter comprising: a base plate, a plurality of support elements mounted on said base plate, a plurality of resonating elements of generally cylindrical shape and having one side flattened mounted parallel to each other on said support elements, input and output means to said plurality of resonating elements mounted on said support elements, and the flattened sides of the resonators are adjacent the base plate.
Claim 7
Dependent Claim
67 words
An electromechanical filter comprising: a base plate, a plurality of support elements mounted on said base plate, a plurality of resonating elements of generally cylindrical shape and having one side flattened mounted parallel to each other on said support elements, input and output means to said plurality of resonating elements mounted on said support elements, and the flattened sides of the resonators are adjacent the base plate.
Claim 8
Dependent Claim
24 words
An electromechanical filter according to claim 5 comprising a secondary coupling means attached to certain of said resonating elements to improve the frequency response.
Claim 9
Dependent Claim
25 words
An electromechanical filter according to claim 6 wherein said secondary coupling means comprises a rod attached to the surface of certain of said resonating elements.
Claim 10
Dependent Claim
22 words
An electromechanical filter according to claim 7 wherein said secondary coupling means is connected to the resonating elements which oscillate in phase.
Claim 11
Dependent Claim
23 words
An electromechanical filter according to claim 7 wherein said secondary coupling means is connected to the resonating elements which oscillate out of phase.
Claim 12
Dependent Claim
68 words
An electromechanical filter comprising: a base plate, a plurality of support elements mounted on said base plate, a plurality of resonating elements of generally cylindrical shape and having one side flattened mounted parallel to each other on said support elements, input and output means to said plurality of resonating elements mounted on said support elements, and the flattened sides of the resonators are perpendicular to the base plAte.
Claim 13
Dependent Claim
68 words
An electromechanical filter comprising: a base plate, a plurality of support elements mounted on said base plate, a plurality of resonating elements of generally cylindrical shape and having one side flattened mounted parallel to each other on said support elements, input and output means to said plurality of resonating elements mounted on said support elements, and the flattened sides of the resonators are perpendicular to the base plAte.
Claim 14
Dependent Claim
24 words
An electromechanical filter according to claim 10 comprising a secondary coupling means attached to certain of said resonating elements to improve the frequency response.
Claim 15
Dependent Claim
25 words
An electromechanical filter according to claim 11 wherein said secondary coupling means comprises a rod attached to the surface of certain of said resonating elements.
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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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |