Patent US2922437A successfully refreshed from Google Patents.
Patent US3831043A successfully refreshed from Google Patents.
US3831043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric oscillator arrangements
Assignee: Siemens AG
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Filing: 1972-12-13
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Granted: 1974-08-20
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Expires: 1992-12-13
Abstract
Abstract A piezoelectric oscillator includes a bar of piezoelectric material having four longitudinal surfaces carrying respective electrodes or electrode areas thereon. The longitudinal edges are chamfered to separate the electrodes or electrode areas and selected electrodes and electrode areas are connected via transverse grooves through the chamfers which carry the electrode material. The grooves are first cut in the piezoelectric bar to a depth greater than that of the chamfer. Then a cohesive conductive coating is applied over the surfaces of the bar and the grooves. Next, the edges are ground to separate the electrodes, except for the connections through the grooves. Two pair of electrodes are connected to respective mutually opposed electrodes at nodal points of the oscillator in the same plane for mechanically mounting and electrically energizing the oscillator.
Inventors
- 👤 R Hoffmann
- 👤 M Mackuth
- 👤 W Mattuschka
- 👤 F Schoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/13; H03H9/05; H03H9/0504; H03H9/0533; H10; H10N; H10N30/00; H10N30/80; H10N30/87; H10N30/875; H10N30/877
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
210 words
An electrode arrangement for a rectangular bar-type piezoelectric oscillator having having first, second, third and fourth longitudinal faces and adapted to operate in the bending mode, comprising electrodes on said four longitudinal faces, two connecting wires serving for mechanical fixing purposes and for electrical contacting being arranged on each of two mutuallyopposite ones of said faces at points corresponding to nodes of oscillation, the electrodes on the adjacent first and fourth of said four faces completely covering such faces, the electrodes on the adjacent second and third of said four faces each comprising areas separated from one another by at least one transverSe discontinuity, said connecting wires attached to said first and third faces, the electrode on the second face comprising two areas divided by a discontinuity located between the connecting wires, the electrode on the third face comprising three areas divided by two discontinuities located between the two respective connecting wires, the electrode on said first face connected to one of the electrode areas on said second face which is connected to the center electrode area on the third face, the other electrode area on said second face connected to the adjacent outer electrode area on said third face which is connected to the electrode on said fourth face.
Claim 2
Dependent Claim
210 words
An electrode arrangement for a rectangular bar-type piezoelectric oscillator having having first, second, third and fourth longitudinal faces and adapted to operate in the bending mode, comprising electrodes on said four longitudinal faces, two connecting wires serving for mechanical fixing purposes and for electrical contacting being arranged on each of two mutuallyopposite ones of said faces at points corresponding to nodes of oscillation, the electrodes on the adjacent first and fourth of said four faces completely covering such faces, the electrodes on the adjacent second and third of said four faces each comprising areas separated from one another by at least one transverSe discontinuity, said connecting wires attached to said first and third faces, the electrode on the second face comprising two areas divided by a discontinuity located between the connecting wires, the electrode on the third face comprising three areas divided by two discontinuities located between the two respective connecting wires, the electrode on said first face connected to one of the electrode areas on said second face which is connected to the center electrode area on the third face, the other electrode area on said second face connected to the adjacent outer electrode area on said third face which is connected to the electrode on said fourth face.
Claim 3
Dependent Claim
16 words
An electrode arrangement as claimed in claim 1 wherein said electrodes consist of layers of chromium-platinum-gold.
Claim 4
Dependent Claim
58 words
An electrode arrangement as claimed in claim 1, comprising chamfer areas at the edge of the oscillator between adjacent electrodes on adjacent faces of the oscillator separating such electrodes, and wherein each connection between electrodes on adjacent faces of the oscillator includes a transverse groove in one of said chamfer areas and a conductive coating in said groove.
Claim 5
Dependent Claim
16 words
An electrode arrangement as claimed in claim 3 wherein said electrodes consist of layers of chromium-platinum-gold.
References Cited (Backward Citations)
US2095376A
Cited
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US3059130A
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DE1113477B
Cited
US3521090A
Cited
US3721841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |