US4275463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timepiece
Assignee: Seiko Instruments Inc
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Filing: 1979-07-17
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Granted: 1981-06-23
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Expires: 1999-07-17
Abstract
Abstract An electronic timepiece having a stepping motor which can be driven at a normal frequency and at a relatively faster correction frequency includes a manually actuable switch and circuitry responsive to two successive actuations of the switch within a first predetermined time period for effecting a change in the motor drive from the normal frequency to the correction frequency and responsive to a third actuation of the switch after a predetermined time period from said change, to return the motor drive to the normal frequency.
Inventors
- 👤 Takashi Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:05
CPC Classifications
G; G04; G04G; G04G9/00; G04G9/08; G04C; G04C9/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
In an electronic timepiece having a stepping motor and controllable means for driving the motor alternatively at a normal frequency and a relatively faster correction frequency, the improvement comprising: manually actuatable switching means; and means connected to said controllable means and responsive to two successive actuations of the switching means within a first predetermined time period for causing said controllable means to effect a change in the motor drive from the normal frequency to the correction frequency and responsive to a third actuation of the switching means after a second predetermined time period from said change for causing said controllable means to effect return of the motor drive to the normal frequency.
Claim 2
Dependent Claim
112 words
In an electronic timepiece having a stepping motor and controllable means for driving the motor alternatively at a normal frequency and a relatively faster correction frequency, the improvement comprising: manually actuatable switching means; and means connected to said controllable means and responsive to two successive actuations of the switching means within a first predetermined time period for causing said controllable means to effect a change in the motor drive from the normal frequency to the correction frequency and responsive to a third actuation of the switching means after a second predetermined time period from said change for causing said controllable means to effect return of the motor drive to the normal frequency.
Claim 3
Dependent Claim
26 words
The timepiece according to claim 1; wherein the switching means comprises a rotatable stem, and switching contacts actuatable in response to the rotation of the stem.
Claim 4
Dependent Claim
21 words
The timepiece according to claim 2; wherein the switching means produces at least one actuation for each revolution of the stem.
References Cited (Backward Citations)
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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) | 1984-06-22 | 1984-12-22 | 1985-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-22 | 1988-12-22 | 1989-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-22 | 1992-12-22 | 1993-06-23 | $7700.00 | Window Closed / Lapsed |