CH657009GA3 - - Google Patents
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- Publication number
- CH657009GA3 CH657009GA3 CH380483A CH380483A CH657009GA3 CH 657009G A3 CH657009G A3 CH 657009GA3 CH 380483 A CH380483 A CH 380483A CH 380483 A CH380483 A CH 380483A CH 657009G A3 CH657009G A3 CH 657009GA3
- Authority
- CH
- Switzerland
- Prior art keywords
- frequency
- step motor
- signal
- frequency signal
- multifunctions
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
- Control Of Stepping Motors (AREA)
Abstract
An electronic analog display timepiece provides multifunctions wherein the hand, or hands, is driven at different frequencies. To prevent erroneous performance of the step motor, an interval longer than the period of damped oscillation of the step motor is provided when the step motor driving frequency changes by synchronizing the lower frequency driving signals with the signal of the highest frequency of the circuit. Alternatively, one pulse of the second frequency signal is eliminated when switching from the first to the second frequency signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57123336A JPS5913972A (en) | 1982-07-15 | 1982-07-15 | Hand display electronic watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH657009GA3 true CH657009GA3 (en) | 1986-08-15 |
Family
ID=14858034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH380483A CH657009GA3 (en) | 1982-07-15 | 1983-07-11 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4526475A (en) |
| JP (1) | JPS5913972A (en) |
| CH (1) | CH657009GA3 (en) |
| GB (1) | GB2123586B (en) |
| HK (1) | HK88487A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60224088A (en) * | 1984-04-20 | 1985-11-08 | Citizen Watch Co Ltd | Hand type timer |
| US4652159A (en) * | 1984-05-02 | 1987-03-24 | Kabushiki Kaisha Seiko Epson | Printer |
| JP2556277Y2 (en) * | 1991-06-07 | 1997-12-03 | 竹内工業株式会社 | Storage container for lipstick etc. |
| JP2570813Y2 (en) * | 1991-06-12 | 1998-05-13 | 日本電気アイシーマイコンシステム株式会社 | Step motor drive circuit |
| US6844910B2 (en) * | 1999-12-28 | 2005-01-18 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422865A (en) * | 1977-07-21 | 1979-02-21 | Seiko Epson Corp | Miniature electronic watch |
| US4290129A (en) * | 1978-07-27 | 1981-09-15 | Kabushiki Kaisha Suwa Seikosha | Electronic watch with supplemental function display |
| JPS5522108A (en) * | 1978-08-02 | 1980-02-16 | Seiko Epson Corp | Corrector for electronic watch |
-
1982
- 1982-07-15 JP JP57123336A patent/JPS5913972A/en active Granted
-
1983
- 1983-07-05 US US06/510,849 patent/US4526475A/en not_active Expired - Lifetime
- 1983-07-06 GB GB08318303A patent/GB2123586B/en not_active Expired
- 1983-07-11 CH CH380483A patent/CH657009GA3/fr not_active IP Right Cessation
-
1987
- 1987-11-26 HK HK884/87A patent/HK88487A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6230596B2 (en) | 1987-07-03 |
| US4526475A (en) | 1985-07-02 |
| JPS5913972A (en) | 1984-01-24 |
| GB2123586B (en) | 1985-08-29 |
| HK88487A (en) | 1987-12-04 |
| GB8318303D0 (en) | 1983-08-10 |
| GB2123586A (en) | 1984-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |