| 摘要 |
PURPOSE:To improve the working accuracy of alarm time by setting the alarm time with the hand of an analog display part displaying ordinary time thereby generating induced voltage. CONSTITUTION:In order to set alarm time, the hand is set at a desired time with an external operating member. When the hand is turned, a rotor 2 revolves, and induced voltage is generated in a coil 9 wound to a yoke 8. This voltage is detected and counted with a counter 10, whereby the number of revolutions of the rotor 2 is counted. From this counter, the signal is stored as time in a storage circuit 11. The storage time in the circuit 11 and the lapse time in a time counter 12 are inputted to a comparator 13, by which these are compared and when the times coincide,an alarm sound is produced from an alarm device 14. |
