Patent US4297838A successfully refreshed from Google Patents.
US4297838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timepiece
Assignee: Citizen Watch Co Ltd
•
Filing: 1978-12-08
•
Granted: 1981-11-03
•
Expires: 1998-12-08
Abstract
Abstract An electronic timepiece comprising a step-motor including a stator and rotor is disclosed. The timepiece is so constructed and arranged that a coil winding core of the stator is located between the stator and a dial of the timepiece and that said stator is disposed on said coil winding core.
Inventors
- 👤 Minoru Watanabe
- 👤 Kazunari Kume
- 👤 Hideshi Ohno
- 👤 Munetaka Tamaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:43
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
An electronic timepiece comprising a step-motor used as an electro-mechanical transducer and including a coil having a coil winding core, stator and rotor; a reduction gear train for reducing rotation of said rotor of said step-motor; a bearing for rotatably supporting at least one gear of said reduction gear train; a gear train supporting plate; and a substrate for supporting all of the above mentioned parts of the timepiece; the improvement comprising a portion of said coil winding core and said stator located in the same plane and adjacent said substrate and a second portion of said coil winding core integral with said first portion and extending on the side of said stator opposite said substrate to form a magnetic connection means between said core and a side of said stator opposite said substrate.
Claim 2
Dependent Claim
134 words
An electronic timepiece comprising a step-motor used as an electro-mechanical transducer and including a coil having a coil winding core, stator and rotor; a reduction gear train for reducing rotation of said rotor of said step-motor; a bearing for rotatably supporting at least one gear of said reduction gear train; a gear train supporting plate; and a substrate for supporting all of the above mentioned parts of the timepiece; the improvement comprising a portion of said coil winding core and said stator located in the same plane and adjacent said substrate and a second portion of said coil winding core integral with said first portion and extending on the side of said stator opposite said substrate to form a magnetic connection means between said core and a side of said stator opposite said substrate.
Claim 3
Dependent Claim
40 words
The electronic timepiece as claimed in claim 1, wherein said second portion of said coil core is an upwardly bent portion permitting the second portion of said coil core to extend on the side of said stator opposite said substrate.
Claim 4
Dependent Claim
18 words
The electronic timepiece as claimed in claim 1, wherein said reduction gear train is located on said substrate.
References Cited (Backward Citations)
US2113693A
Cited
US2435911A
Cited
US3902312A
Cited
US3898789A
Cited
US3824781A
Cited
US3989967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |