Patent US3146415A successfully refreshed from Google Patents.
US3146415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical filter
Assignee: Siemens and Halske AG
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Filing: 1961-02-23
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Granted: 1964-08-25
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Expires: 1981-02-23
Abstract
No abstract record available.
Inventors
- 👤 Albsmeier Hans
- 👤 Freystedt Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:21
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
AN ELECTROMECHANICAL FILTER COMPRISING ELONGATED METALLIC RESONATORS WHICH ARE BY MEANS OF PIEZOELECTRIC EXCITATION ELEMENTS ENERGIZED TO EXECUTE LONGITUDINAL OSCIL-E LATIONS, SAID RESONATORS BEING DISPOSED TO OSCILLATE IN A COMMON DIRECTION, SUCCESSIVELY DISPOSED RESONATORS BEING COUPLED BY MEANS OF COUPLING MEMBERS EXTENDING IN THE OSCILLATION NODE INTERMEDIATE THE ENDS OF THE RESPECTIVE RESONATORS, THE LENGTH OF SAID COUPLING MEMBERS BEING CONSIDERABLY SHORTER THAN ONE QUARTER WAVE LENGTH OF THE MATERIAL THEREOF AND THE CROSS SECTIONAL DIMENSIONS OF SAID COUPLING MEMBERS BEING SUCH AS TO OBTAIN A PREDETERMINED VALUE WITH RESPECT TO THE COUPLING OF SUCCESSIVE RESONATORS WHICH COUPLING IS EFFECTED BY SHEARING FORCES, EACH INDIVIDUAL PIEZOELECTRIC EXCITATION ELEMENT COMPRISING A RELATIVELY THIN PLATE OF ELECTROSTRICTIVE MATERIAL, EACH PLATE BEING FASTENED TO AND SUPPORTED BY AN END OF A RESPECTIVE RESONATOR WHICH LIES IN OSCILLATION DIRECTION AND BEING PROVIDED WITH A RELATIVELY THIN CONDUCTIVE COATING FORMING WITH RESPECT TO THE METALLIC RESONATOR A FURTHER ELECTRODE, AND WIRE MEANS ATTACHED AT LEAST TO THE OUTER RESONATORS WITHIN THE REGION OF THE OSCILLATION NODE PLANE WHICH EXTENDS PERPENDICULAR TO THE RESONATOR AXIS, SAID WIRE MEANS SERVING AS HOLDING MEANS FOR THE FILTER.
Claim 2
Dependent Claim
189 words
AN ELECTROMECHANICAL FILTER COMPRISING ELONGATED METALLIC RESONATORS WHICH ARE BY MEANS OF PIEZOELECTRIC EXCITATION ELEMENTS ENERGIZED TO EXECUTE LONGITUDINAL OSCIL-E LATIONS, SAID RESONATORS BEING DISPOSED TO OSCILLATE IN A COMMON DIRECTION, SUCCESSIVELY DISPOSED RESONATORS BEING COUPLED BY MEANS OF COUPLING MEMBERS EXTENDING IN THE OSCILLATION NODE INTERMEDIATE THE ENDS OF THE RESPECTIVE RESONATORS, THE LENGTH OF SAID COUPLING MEMBERS BEING CONSIDERABLY SHORTER THAN ONE QUARTER WAVE LENGTH OF THE MATERIAL THEREOF AND THE CROSS SECTIONAL DIMENSIONS OF SAID COUPLING MEMBERS BEING SUCH AS TO OBTAIN A PREDETERMINED VALUE WITH RESPECT TO THE COUPLING OF SUCCESSIVE RESONATORS WHICH COUPLING IS EFFECTED BY SHEARING FORCES, EACH INDIVIDUAL PIEZOELECTRIC EXCITATION ELEMENT COMPRISING A RELATIVELY THIN PLATE OF ELECTROSTRICTIVE MATERIAL, EACH PLATE BEING FASTENED TO AND SUPPORTED BY AN END OF A RESPECTIVE RESONATOR WHICH LIES IN OSCILLATION DIRECTION AND BEING PROVIDED WITH A RELATIVELY THIN CONDUCTIVE COATING FORMING WITH RESPECT TO THE METALLIC RESONATOR A FURTHER ELECTRODE, AND WIRE MEANS ATTACHED AT LEAST TO THE OUTER RESONATORS WITHIN THE REGION OF THE OSCILLATION NODE PLANE WHICH EXTENDS PERPENDICULAR TO THE RESONATOR AXIS, SAID WIRE MEANS SERVING AS HOLDING MEANS FOR THE FILTER.
References Cited (Backward Citations)
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US2814785A
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |