US3619672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric ceramic resonator and mounting
Assignee: Panasonic Holdings Corp
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Filing: 1970-09-11
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Granted: 1971-11-09
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Expires: 1990-09-11
Abstract
Abstract A ceramic resonator and mounting comprising a ceramic resonator having electrodes on both flat major opposite surfaces thereof, and a pair of cover plates of elasto-conductive material, each of which has an electric terminal and at least one contact means. Said resonator is supported between said contact means of said pair of cover members so as to be subjected to contact pressure by said contact means. An insulating spacer surrounds the periphery of said resonator and securely joins said pair of cover members to each other so as to form a housing around said resonator.
Inventors
- 👤 Takashi Nagata
- 👤 Michio Ishibashi
- 👤 Yasuo Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:19
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A ceramic resonator and mounting therefor comprising a ceramic resonator having opposite flat major surfaces, electrodes applied to both said surfaces, a pair of cover members of elastoconductive material, each of which has an electric terminal and has at least one electrically conductive projection projecting toward the other cover member, said resonator being supported between said projections projecting from said pair of cover members with the projections in electrical contact with said electrodes, and said resonator being under a contact pressure of from 30 to 500 gm./cm.2 through said projections, and an insulating spacer surrounding the periphery of said resonator and being spaced less than 1 mm. from said periphery and attached securely between the peripheral edges of said pair of cover members around the entire periphery thereof, said cover member and said insulating spacer forming a completely closed housing having said resonator sealed therein.
Claim 2
Dependent Claim
145 words
A ceramic resonator and mounting therefor comprising a ceramic resonator having opposite flat major surfaces, electrodes applied to both said surfaces, a pair of cover members of elastoconductive material, each of which has an electric terminal and has at least one electrically conductive projection projecting toward the other cover member, said resonator being supported between said projections projecting from said pair of cover members with the projections in electrical contact with said electrodes, and said resonator being under a contact pressure of from 30 to 500 gm./cm.2 through said projections, and an insulating spacer surrounding the periphery of said resonator and being spaced less than 1 mm. from said periphery and attached securely between the peripheral edges of said pair of cover members around the entire periphery thereof, said cover member and said insulating spacer forming a completely closed housing having said resonator sealed therein.
Claim 3
Dependent Claim
28 words
A ceramic resonator and mounting as claimed in claim 1, wherein said pair of cover members are adhered to said insulating spacer by an adhesive backed plastic tape.
Claim 4
Dependent Claim
28 words
A ceramic resonator and mounting as claimed in claim 1, wherein said housing is embedded in an organic resin with said electric terminals extending from said organic resin.
Claim 5
Dependent Claim
23 words
A ceramic resonator and mounting as claimed in claim 1, wherein said ceramic resonator vibrates in the thickness-shear mode at an operating frequency.
Claim 6
Dependent Claim
23 words
A ceramic resonator and mounting as claimed in claim 1, wherein said ceramic resonator vibrates in the thickness-extension mode at an operating frequency.
References Cited (Backward Citations)
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US2386692A
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US2430478A
Cited
US2438708A
Cited
US2488781A
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US3167668A
Cited
US3299301A
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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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |