GB1520533A - Pulse generating circuit for a timepiece - Google Patents
Pulse generating circuit for a timepieceInfo
- Publication number
- GB1520533A GB1520533A GB1954976A GB1954976A GB1520533A GB 1520533 A GB1520533 A GB 1520533A GB 1954976 A GB1954976 A GB 1954976A GB 1954976 A GB1954976 A GB 1954976A GB 1520533 A GB1520533 A GB 1520533A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency divider
- motor
- switch
- coil
- waveform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C13/00—Driving mechanisms for clocks by master-clocks
- G04C13/08—Slave-clocks actuated intermittently
- G04C13/10—Slave-clocks actuated intermittently by electromechanical step advancing mechanisms
- G04C13/11—Slave-clocks actuated intermittently by electromechanical step advancing mechanisms with rotating armature
-
- 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)
- Control Of Stepping Motors (AREA)
Abstract
1520533 Electronic timepieces SEIKO KOKI K K 12 May 1976 [22 May 1975] 19549/76 Heading G3T In an electronic timepiece wherein a stepping motor is coupled to a seconds hand and has a coil M, Fig. 1, energized via a CMOS transistor bridge circuit Q1 to Q4 controlled by the complementary outputs of a frequency divider 3 an early stage of which is a dynamic frequency divider, the motor coil M is connected in series with a capacitor C o and is shunted by a normally open switch. Closure of the switch shorts the motor coil, thus stopping the motor and hence movement of the seconds hand for setting purposes. In Fig. 2, the normal driving current waveform is illustrated in line i and i' indicates the waveform of current flowing between terminals a, b when the switch is closed. It is demonstrated that integration of the respective current waveforms shows that the current consumption is the same in both cases. A crystal controlled oscillator feeds the frequency divider 3 the remaining stages of which may comprise a binary counter.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6964975U JPS5542316Y2 (en) | 1975-05-22 | 1975-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1520533A true GB1520533A (en) | 1978-08-09 |
Family
ID=13408892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1954976A Expired GB1520533A (en) | 1975-05-22 | 1976-05-12 | Pulse generating circuit for a timepiece |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS5542316Y2 (en) |
DE (1) | DE2622860A1 (en) |
GB (1) | GB1520533A (en) |
-
1975
- 1975-05-22 JP JP6964975U patent/JPS5542316Y2/ja not_active Expired
-
1976
- 1976-05-12 GB GB1954976A patent/GB1520533A/en not_active Expired
- 1976-05-21 DE DE19762622860 patent/DE2622860A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
JPS5542316Y2 (en) | 1980-10-03 |
JPS51148978U (en) | 1976-11-29 |
DE2622860A1 (en) | 1976-12-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |