US3691753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric or electronic timepiece
Assignee: Suwa Seikosha KK
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Filing: 1970-09-08
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Granted: 1972-09-19
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Expires: 1990-09-08
Abstract
Abstract An electric or electronic timepiece having a step motor energized by an electric signal and a second wheel moving intermittently and driven by said rotor. A member is mounted on the rotor, or on an intermediate wheel coupling said rotor and second wheel, for positioning said second wheel at predetermined positions when said electric signal is cut off.
Inventors
- 👤 Masahiro Kurita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:19
CPC Classifications
G; G04; G04C; G04C13/00; G04C13/08; G04C13/10; G04C13/11; G04C3/00; G04C3/001; G04C3/005; G04C9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
An electric or electronic timepiece comprising a step motor having a rotor; means for producing an electric driving signal connected to said step motor for incrementally advancing said rotor; a second wheel operatively coupled to said rotor for incremental rotation in response thereto; cam means mounted on said rotor for rotation therewith; and means displaceable into and out of engagement with said cam means coordinated with the cutting off and restarting of said electric signal respectively for rotatably positioning said rotor, and therefore said second wheel, at predetermined positions when said electric signal is cut off.
Claim 2
Dependent Claim
96 words
An electric or electronic timepiece comprising a step motor having a rotor; means for producing an electric driving signal connected to said step motor for incrementally advancing said rotor; a second wheel operatively coupled to said rotor for incremental rotation in response thereto; cam means mounted on said rotor for rotation therewith; and means displaceable into and out of engagement with said cam means coordinated with the cutting off and restarting of said electric signal respectively for rotatably positioning said rotor, and therefore said second wheel, at predetermined positions when said electric signal is cut off.
Claim 3
Dependent Claim
60 words
An electric or electronic timepiece as recited in claim 1, wherein said rotor is formed with n poles, said cam means being formed with n/2 radially extending projection for receiving said displaceable means therebetween, said projection being aligned relative to said poles for the positioning of said rotor at one of n/2 positions when said electric signal is cut off.
Claim 4
Dependent Claim
44 words
An electric or electronic timepiece as recited in claim 1, including means projecting externally of said timepiece and operatively coupled to said electric signal producing means and said displaceable means for coordinately cutting off and restarting said electric signal and displacing said displaceable means.
Claim 5
Dependent Claim
97 words
An electric or electronic timepiece comprising a step motor having a rotor; means for producing a driving electric signal for incrementally rotating said rotor; an intermediate wheel operatively coupled to said rotor for rotation therewith; a second wheel operatively coupled to said intermediate wheel for incremental rotation in response to the rotation of said rotor; cam means mounted on said intermediate wheel for rotation therewith; and means displaceable into and out of engagement with said cam means for positioning said intermediate wheel, and therefore said second wheel, at predetermined positions when said elector signal is cut off.
Claim 6
Dependent Claim
97 words
An electric or electronic timepiece comprising a step motor having a rotor; means for producing a driving electric signal for incrementally rotating said rotor; an intermediate wheel operatively coupled to said rotor for rotation therewith; a second wheel operatively coupled to said intermediate wheel for incremental rotation in response to the rotation of said rotor; cam means mounted on said intermediate wheel for rotation therewith; and means displaceable into and out of engagement with said cam means for positioning said intermediate wheel, and therefore said second wheel, at predetermined positions when said elector signal is cut off.
Claim 7
Dependent Claim
41 words
An electric or electronic timepiece as recited in claim 4, wherein said rotor is formed with n poles, said cam means being formed with n/2 projections for receiving said displaceable means therebetween to position said cam means at n/2 predetermined positions.
Claim 8
Dependent Claim
44 words
An electric or electronic timepiece as recited in claim 4, including means projecting externally of said timepiece and operatively coupled to said electric signal producing means and said displaceable means for coordinately cutting off and restarting said electric signal and displacing said displaceable means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |