CH628488GA3 - - Google Patents
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- Publication number
- CH628488GA3 CH628488GA3 CH1490877A CH1490877A CH628488GA3 CH 628488G A3 CH628488G A3 CH 628488GA3 CH 1490877 A CH1490877 A CH 1490877A CH 1490877 A CH1490877 A CH 1490877A CH 628488G A3 CH628488G A3 CH 628488GA3
- Authority
- CH
- Switzerland
- Prior art keywords
- rotor
- magnetically
- coil
- stator
- pulse
- 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
- G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G5/00—Setting, i.e. correcting or changing, the time-indication
- G04G5/02—Setting, i.e. correcting or changing, the time-indication by temporarily changing the number of pulses per unit time, e.g. quick-feed method
Abstract
An electronic watch comprising a rotor magnetically connected to more than two poles, a stator composed of material of high magnetic transmission factor magnetically engaging with the rotor, means composed of coil magnetically connected to the stator and for positioning the rotor in advance in order to determine a rotating direction of the rotor and means a step motor driven by an alternating pulses, wherein a position of the rotor is brought back to a former magnetically horizontal position from an original position thereof by applying a reverse polarity pulse to the coil just before a normal pulse, and then the rotor is rotated in reverse by the normal pulse whereby a needle may be reversed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14693976A JPS5370876A (en) | 1976-12-07 | 1976-12-07 | Electronic wristwatch |
Publications (2)
Publication Number | Publication Date |
---|---|
CH628488B CH628488B (en) | |
CH628488GA3 true CH628488GA3 (en) | 1982-03-15 |
Family
ID=15418978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1490877A CH628488B (en) | 1976-12-07 | 1977-12-06 | ELECTRONIC WATCH, ESPECIALLY ELECTRONIC BRACELET WATCH. |
Country Status (8)
Country | Link |
---|---|
US (1) | US4205262A (en) |
JP (1) | JPS5370876A (en) |
CH (1) | CH628488B (en) |
DE (1) | DE2752880C2 (en) |
FR (1) | FR2373817A1 (en) |
GB (1) | GB1571260A (en) |
HK (1) | HK51182A (en) |
SG (1) | SG44382G (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53132382A (en) * | 1977-04-23 | 1978-11-18 | Seiko Instr & Electronics Ltd | Electronic watch |
FR2450527A1 (en) * | 1979-03-01 | 1980-09-26 | Suisse Horlogerie | NON REVERSIBLE STEPPER MOTOR |
FR2461399A1 (en) * | 1979-07-09 | 1981-01-30 | Suisse Horlogerie | POSITION DETECTOR OF A STEP BY STEP MOTOR |
US4375049A (en) * | 1980-09-24 | 1983-02-22 | Timex Corporation | Stepping motor drive circuit for bi-directional rotation |
US4912692A (en) * | 1988-09-29 | 1990-03-27 | Timex Corporation | High rate, bidirectional drive for a bipole stepping motor watch |
DE4090927B4 (en) * | 1989-06-01 | 2006-09-21 | Papst Licensing Gmbh & Co. Kg | Incorporated position sensor for collectorless DC motor - uses evaluation of currents fed through motor inductances |
JP3981669B2 (en) * | 2004-03-02 | 2007-09-26 | セイコーエプソン株式会社 | Motor and motor drive system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6024680B2 (en) * | 1973-03-07 | 1985-06-14 | セイコーインスツルメンツ株式会社 | Clock step motor drive circuit |
JPS5239111A (en) * | 1975-09-25 | 1977-03-26 | Citizen Watch Co Ltd | Pulse motor for electronic clock |
JPS5240712A (en) * | 1975-09-27 | 1977-03-29 | Citizen Watch Co Ltd | Pulse motor for electronic clocks |
JPS5280063A (en) * | 1975-12-26 | 1977-07-05 | Citizen Watch Co Ltd | Reversible pulse motor system and watch |
US4055785A (en) * | 1976-01-12 | 1977-10-25 | Fumio Nakajima | Stepping motor for electronic timepiece |
-
1976
- 1976-12-07 JP JP14693976A patent/JPS5370876A/en active Pending
-
1977
- 1977-11-26 DE DE2752880A patent/DE2752880C2/en not_active Expired
- 1977-12-05 FR FR7736510A patent/FR2373817A1/en not_active Withdrawn
- 1977-12-06 GB GB50731/77A patent/GB1571260A/en not_active Expired
- 1977-12-06 CH CH1490877A patent/CH628488B/en unknown
- 1977-12-07 US US05/858,440 patent/US4205262A/en not_active Expired - Lifetime
-
1982
- 1982-09-11 SG SG44382A patent/SG44382G/en unknown
- 1982-11-25 HK HK511/82A patent/HK51182A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE2752880A1 (en) | 1978-06-08 |
GB1571260A (en) | 1980-07-09 |
JPS5370876A (en) | 1978-06-23 |
US4205262A (en) | 1980-05-27 |
CH628488B (en) | |
HK51182A (en) | 1982-12-03 |
DE2752880C2 (en) | 1985-05-02 |
FR2373817A1 (en) | 1978-07-07 |
SG44382G (en) | 1983-02-25 |
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