Patent US3795831A successfully refreshed from Google Patents.
US3795831A
Expired / Lapsed
US
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Miniature tuning fork type crystal vibrator
Assignee: Suwa Seikosha KK
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Filing: 1972-04-26
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Granted: 1974-03-05
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Expires: 1992-04-26
Abstract
Abstract A crystal vibrator having a tuning fork type vibrator supported by a pair of flexible supporting wires, each of said wires being fixed at one end to opposed sides of said vibrator along the symmetrical axis thereof. The other end of each of said supporting wires is rigidly fixed, with the portion in between extending substantially parallel to said vibrator, said supporting wire being dimensioned and positioned so that the center of rotation on said wire is substantially aligned with the center of gravity of said vibrator when said vibrator is subjected to external shock.
Inventors
- 👤 K Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:38
CPC Classifications
G; G04; G04F; G04F5/00; G04F5/04; G04F5/06; G04F5/063; H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
171 words
A crystal vibrator comprising a tuning fork crystal vibrator having a pair of tines and a root portion, said vibrator having two substantially ''''U'''' shaped parallel faces; a support member comprising two flexible support wires; one wire connected at one of its ends to the root portion of one of the U shaped faces, extending perpendicular to said plane, then bent toward the tine portions so as to extend parallel to said face; the second end of said support wire being fixedly supported, the second support wire being similarly attached to the second U shaped plane of the crystal; said support wires being positioned and dimensioned so that the points of contact between said support wires and said vibrator root portion lie substantially on the symmetrical axis of said vibrator, said supporting wires being further dimensioned and positioned so that the center of rotation of said vibrator in response to an external shock corresponds to the center of gravity of said vibrator and is located in the region of said tines.
Claim 2
Dependent Claim
171 words
A crystal vibrator comprising a tuning fork crystal vibrator having a pair of tines and a root portion, said vibrator having two substantially ''''U'''' shaped parallel faces; a support member comprising two flexible support wires; one wire connected at one of its ends to the root portion of one of the U shaped faces, extending perpendicular to said plane, then bent toward the tine portions so as to extend parallel to said face; the second end of said support wire being fixedly supported, the second support wire being similarly attached to the second U shaped plane of the crystal; said support wires being positioned and dimensioned so that the points of contact between said support wires and said vibrator root portion lie substantially on the symmetrical axis of said vibrator, said supporting wires being further dimensioned and positioned so that the center of rotation of said vibrator in response to an external shock corresponds to the center of gravity of said vibrator and is located in the region of said tines.
Claim 3
Dependent Claim
73 words
A crystal vibrator as recited in claim 1 wherein the points of contact between said ends of said supporting wires and said vibrator root portion are positioned so that the distance between each said point of contact and the end of said tines adjacent said vibrator root portion is equal to about 3 to 6 times the width of one of said tines in a region thereof spaced from said vibrator root portion.
Claim 4
Dependent Claim
52 words
A crystal vibrator as recited in claim 1, including a welded case, said crystal vibrator being mounted within sAid case, and an internal cap member mounted within said case above and about the region of said tines spaced from said root portion, said internal cap member being formed of a resilient material.
Claim 5
Dependent Claim
41 words
A crystal vibrator as recited in claim 1, wherein the ends of said supporting wires engage said vibrator root portion at respective points of contact on opposed sides of said vibrator root portion which are out of alignment with each other.
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |