Electronic master and subordinate watch |
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| 申请号 | JP1458178 | 申请日 | 1978-02-10 | 公开(公告)号 | JPS54107777A | 公开(公告)日 | 1979-08-23 |
| 申请人 | Seiko Instr & Electronics Ltd; | 发明人 | SHIMANO KEIJI; | ||||
| 摘要 | PURPOSE: To simplify constitution and transmit the time from the master watch to the sub-watch without malfunction by using an alarm speaker in transmission. CONSTITUTION: The synthesized carrier of the frequency divided outputs of the watch part 1 of a master watch such as the one corresponding to the resonance frequency of an alarm speaker 5 of a sub-watch is made to the time displaying carrier by a gate or the like whose opening and closing are controlled by the output of the time displaying shift register or the like of a time data making part and is then radiated from the speaker 4 of the master watch. It is then well received without the effect of noise, etc. in a speaker 5 of narrow band frequency characteristics. Hence, the watch part 8 of the sub-watch is controlled via time correcting part 7 according to the receiving signal of the speaker 5. COPYRIGHT: (C)1979,JPO&Japio |
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| 说明书全文 | |||||||
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