| 摘要 |
PURPOSE:To facilitate time correcting operation for each city by driving clocking circuits for respective cities with clock pulses and making a time adjustment with common correction pulses. CONSTITUTION:The clock pulses from a clock pulse generating circuit CL consisting of an oscillator and a frequency divider are added to clocking circuits T1-Tn provided to cities though an OR gate G, so that the time of each city is displayed on time display parts D1-Dn. When initial setting is made, the setting devices S1 and Sn set time differences made among cities and set them in respective clocking circuits T1-Tn with a preset switch. Then common correction pulses are supplied from the switches AJ1 and AJ2 to respective clocking circuits T1-Tn through the gate G and the time of a specific city is adjusted to the present time of the city. Consequently, the time of each city is adjusted at the same time. |
