| 摘要 |
PURPOSE:To perform arbitrary time correction regardless of time anouncement, by advancing or delaying the watch based on the length of the ON period of a correcting switch. CONSTITUTION:In order to advance the watch, the correcting switch 12 is closed, and a monostable multivibrator 15 is operated by the rise up pulse. When the correcting switch 12 is opened within the operating time of said monostable multivibrator 15, a pulse is concurrently outputted from an AND circuit 16 at the opening, time display parts 5, 7, 9, and 11 which are selected by a switch 17 are advanced by 1. In order to delay the watch, the correcting switch 12 is closed for the period longer than the operating time period of the monostable multivibrator 15. Then a pulse is outputted from an AND circuit 19 when the correcting switch 12 is opened, a gate 3 is closed for about 1 second, and the supply of the output of the frequency divider 2 to a second count display 5 is blocked. |
