US3610969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic piezoelectric resonator for use as filter or transformer
Assignee: Duracell Inc USA
•
Filing: 1970-02-06
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Granted: 1971-10-05
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Expires: 1990-02-06
Abstract
Abstract A piezoelectric ceramic device including a plurality of piezoelectric ceramic plates adhered together by a metallic inner electrode. At least one of the plates has an aperture for receiving a connecting lead to the metallic inner electrode. The ceramic plates are formed as a monolithic unit by being integrally fused together through the inner electrode. The device can be used as a filter or transformer in an electrical circuit.
Inventors
- 👤 Charles D Clawson
- 👤 Joseph F Riley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:44
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/40; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/581; H03H9/60; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
25 words
A device according to claim 1, wherein said ceramic plates are integrally fused together with said metallic inner electrode therebetween to form a monolithic unit.
Claim 2
Dependent Claim
18 words
A device according to claim 2, wherein said ceramic plate has said aperture at substantially its nodal point.
Claim 3
Dependent Claim
12 words
A device according to claim 3, wherein said ceramic plates are disc-shaped.
Claim 4
Dependent Claim
19 words
A device according to claim 4, wherein said plurality of piezoelectric ceramic plates embody a pair of said plates.
Claim 5
Dependent Claim
16 words
A device according to claim 5, wherein said metallic inner electrode is a noble metal material.
Claim 6
Dependent Claim
22 words
A device according to claim 6, wherein said noble metal material is selected from the group consisting of silver and platinum materials.
Claim 7
Dependent Claim
29 words
A device according to claim 4, wherein said plurality of piezoelectric ceramic plates embody a pair of said ceramic plates, each of said ceramic plates having an aperture therein.
Claim 8
Dependent Claim
16 words
A device according to claim 8, wherein said metallic inner electrode is a noble metal material.
Claim 9
Dependent Claim
22 words
A device according to claim 9, wherein said noble metal material is selected from the group consisting of silver and platinum materials.
Claim 10
Dependent Claim
43 words
A device according to claim 4, wherein said plurality of piezoelectric ceramic plates embody three ceramic plates, adhered with two metallic inner electrodes therebetween, each said outer ceramic plates having an aperture therein for receiving a connecting lead to each said inner electrode.
Claim 11
Dependent Claim
16 words
A device according to claim 11, wherein said metallic inner electrode is a noble metal material.
Claim 12
Dependent Claim
22 words
A device according to claim 12, wherein said noble metal material is selected from the group consisting of silver and platinum materials.
Claim 13
Dependent Claim
32 words
A device according to claim 1, including a mounting means comprising a base means provided with post means for supporting lead connections to said device, said lead connections holding said device therebetween.
Claim 14
Dependent Claim
33 words
A device according to claim 14, wherein said base means is provided with a pair of post means, each post means supporting a lead connection for holding said device therebetween by pressure contact.
Claim 15
Dependent Claim
14 words
A device according to claim 15, further including a cover positioned around said device.
Claim 16
Dependent Claim
46 words
A process for preparing the device of claim 2, comprising forming said ceramic plates with a metal electrode material applied therebetween and firing said unit at a temperature and for a time sufficient to fuse said plates through said metal electrode to form a monolithic unit.
Claim 17
Dependent Claim
17 words
A process according to claim 17, wherein said metal electrode material is a noble metal paste material.
Claim 18
Dependent Claim
31 words
A process according to claim 18, wherein said noble metal paste is a silver material and said unit is fired at a temperature of about 1400* F. to about 1600* F.
Claim 19
Dependent Claim
17 words
A process according to claim 18, wherein said plates are matured during said firing of said unit.
Claim 20
Dependent Claim
29 words
A process according to claim 20, wherein said noble metal paste is a platinum material and said unit is fired at the sintering temperature of the piezoelectric ceramic material.
References Cited (Backward Citations)
US2203486A
Cited
US2474241A
Cited
US2882462A
Cited
CH386141A
Cited
US3145311A
Cited
US3433982A
Cited
US3403358A
Cited
US3345588A
Cited
US3489931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |