US3931388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal resonator housing configurations
Assignee: United States Department of the Army
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Filing: 1974-05-31
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Granted: 1976-01-06
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Expires: 1994-05-31
Abstract
Abstract A ceramic package is disclosed which comprises a frame member having an ature for accommodating a crystal resonator. The frame member includes mounting clips for supporting the crystal resonator in a desired vibratory mode. A bottom and top lid are then fastened to the frame to enclose the crystal to also enable hermetic sealing in an ultra high vacuum without the use of large deleterious forces. The package provides a hermetic enclosure enabling improved frequency stability and overall reliability.
Inventors
- 👤 Erich Hafner
- 👤 John R. Vig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:00
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
229 words
A force responsive resonator assembly of the type capable of mechanically vibrating or flexing at a predetermined rate, comprising: a. a crystal having parallel upper and lower surfaces and a squared outer edge; b. a frame assembly having a central aperture, said frame assembly fabricated from an insulator material and including first and second layers of metallic conducting material embedded in the wall of said assembly, said first and second layers aligned in a common plane and located on opposite sides of said aperture; c. first and second support members mounted on said frame located within said aperture and electrically coupled to said first and second layers of said metallic conducting material; d. each said support member comprising a flexible curved ribbon member secured within said central aperture and electrically connected to said first and second layers of said metallic conducting material, said ribbon member including a V-shaped slot having a width substantially greater than the height of said crystal; e. said crystal being mounted in said central aperture with said edges of said crystal extending into said V-shaped slots, said edges being joined to said ribbon members along a line at the upper and lower periphery of said edges; and f. means coupled to said frame assembly at both ends of said central aperture to hermetically enclose said force responsive member within the hollow formed by said aperture.
Claim 2
Dependent Claim
229 words
A force responsive resonator assembly of the type capable of mechanically vibrating or flexing at a predetermined rate, comprising: a. a crystal having parallel upper and lower surfaces and a squared outer edge; b. a frame assembly having a central aperture, said frame assembly fabricated from an insulator material and including first and second layers of metallic conducting material embedded in the wall of said assembly, said first and second layers aligned in a common plane and located on opposite sides of said aperture; c. first and second support members mounted on said frame located within said aperture and electrically coupled to said first and second layers of said metallic conducting material; d. each said support member comprising a flexible curved ribbon member secured within said central aperture and electrically connected to said first and second layers of said metallic conducting material, said ribbon member including a V-shaped slot having a width substantially greater than the height of said crystal; e. said crystal being mounted in said central aperture with said edges of said crystal extending into said V-shaped slots, said edges being joined to said ribbon members along a line at the upper and lower periphery of said edges; and f. means coupled to said frame assembly at both ends of said central aperture to hermetically enclose said force responsive member within the hollow formed by said aperture.
Claim 3
Dependent Claim
14 words
The apparatus according to claim 1 wherein said insulator material is a ceramic material.
Claim 4
Dependent Claim
25 words
The apparatus according to claim 1 wherein said frame assembly is fabricated from a high alumina ceramic including at least 90% or more of alumina.
Claim 5
Dependent Claim
16 words
The apparatus according to claim 1 wherein said frame assembly is fabricated from a berriyllia ceramic.
Claim 6
Dependent Claim
32 words
The apparatus according to claim 1 wherein said means coupled to said frame assembly includes a layer of deposited metal about the perimeter of said frame at said top and bottom ends.
Claim 7
Dependent Claim
94 words
The apparatus according to claim 5 wherein said means coupled to said frame assembly comprise a top and bottom lid cover members having a centrally located ridge approximately congruent with said central aperture for insertion thereto, the edges of said lid nesting about the metallized perimeter of said frame at said top and bottom ends, and a layer of metal covering that portion of each lid coacting with said frame perimeter at said appropriate end to permit the formation of an adhesion bond to thereby enclose the hollow confines formed by said frame aperture.
Claim 8
Dependent Claim
16 words
The apparatus according to claim 1 wherein said frame assembly is fabricated from a ceramic tape.
References Cited (Backward Citations)
US1875324A
Cited
FR667387A
Cited
DE754162C
Cited
US2341683A
Cited
US2409838A
Cited
US3069572A
Cited
US3047749A
Cited
US3173035A
Cited
US3832761A
Cited
US3828210A
Cited
IT216054Z2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |