US3679919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic resonators
Assignee: Toshiba Corp
•
Filing: 1971-05-05
•
Granted: 1972-07-25
•
Expires: 1991-05-05
Abstract
Abstract In a ceramic resonator of the type comprising an outer casing, a disc shaped ceramic resonator element, a pair of resilient terminal members on both sides of the resonator element, each including a projection for supporting the resonator element, and a split inner casing contained in the outer casing for containing the resonance element and terminal members, one half of the split inner casing is provided with an annular rib on its mating surface and a cylindrical recess inside the annular rib, and the other half of the split inner casing is provided with a cylindrical recess on its mating surface for receiving the annular rib whereby when the resonator and the terminal members are assembled in a space defined by the recesses of the inner casing halves, the resonator element is resiliently supported between the projections of the terminal members at its geometrical center.
Inventors
- 👤 Noboru Ichinose
- 👤 Katsunori Yokoyama
- 👤 Hisashi Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:09
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
A ceramic resonator comprising: an outer casing; a disc shaped ceramic resonator elemeNt adapted to vibrate in the radial expansion mode; a pair of resilient terminal members on both sides of said resonator element, each one of said terminal members having a projection for electrically contacting and supporting said resonator element; an inner casing contained in said outer casing having a cavity for containing said resonator element and said terminal members therein, said cavity having a diameter slightly larger than that of said resonator element, said inner casing including two members, the first inner casing member being provided with an annular rib and a cylindrical recess inside of said annular rib on one surface thereof, and the second inner casing member being provided with a cylindrical recess for receiving said annular rib of the first inner casing member, said first and second inner casing members being mated with each other to define said cavity by said recesses thereof, said ceramic resonator element and resilient terminal members being mounted within said cavity such that said ceramic resonator element is resiliently supported between said projections of said resilient terminal members at its geometrical center, with a space between said ceramic resonator element and the walls of said cavity.
Claim 2
Dependent Claim
206 words
A ceramic resonator comprising: an outer casing; a disc shaped ceramic resonator elemeNt adapted to vibrate in the radial expansion mode; a pair of resilient terminal members on both sides of said resonator element, each one of said terminal members having a projection for electrically contacting and supporting said resonator element; an inner casing contained in said outer casing having a cavity for containing said resonator element and said terminal members therein, said cavity having a diameter slightly larger than that of said resonator element, said inner casing including two members, the first inner casing member being provided with an annular rib and a cylindrical recess inside of said annular rib on one surface thereof, and the second inner casing member being provided with a cylindrical recess for receiving said annular rib of the first inner casing member, said first and second inner casing members being mated with each other to define said cavity by said recesses thereof, said ceramic resonator element and resilient terminal members being mounted within said cavity such that said ceramic resonator element is resiliently supported between said projections of said resilient terminal members at its geometrical center, with a space between said ceramic resonator element and the walls of said cavity.
Claim 3
Dependent Claim
31 words
The ceramic resonator according to claim 1 wherein said cavity of said inner casing has a diameter which is 0.2 to 2 millimeters larger than that of said ceramic resonator element.
Claim 4
Dependent Claim
15 words
The ceramic resonator according to claim 1 wherein said inner casing is of polyacetal resin.
Claim 5
Dependent Claim
25 words
The ceramic resonator according to claim 1 wherein said annular rib on the first inner casing member comprises a plurality of circumferentially spaced apart segments.
Claim 6
Dependent Claim
41 words
The ceramic resonator according to claim 1 comprising an additional recess formed substantially centrally of the inner wall of at least one of said first and second inner casing members for receiving at least a portion of a resilient terminal member.
References Cited (Backward Citations)
US2454244A
Cited
US2448352A
Cited
US3255431A
Cited
US3299301A
Cited
US3453458A
Cited
US3359435A
Cited
US3562764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |