| 摘要 |
PURPOSE:To attain a game clock which copes with different time limits with a high precision, by switching and using driving signals of prescribed frequency division ratios and reading display characters of corresponding measure intervals. CONSTITUTION:When a game player clock 2 is switched for 3hr, an hour hand 11 and a minute hand 10 which are turned once every one hour and every 12hr hours respectively by one-second pulses are driven by pulses, which are obtained by 1/4 frequency division of one-second pulses, and are turned once every 15min and every 3hr respectively. The elapsed time and the left time for 3hr are displayed on measure characters 4, which divide the circle equally into 12, and measure characters 5, which divide it equally into 15, different in measure intervals from measure characters 3 for 12hr respectively. The clock is switched for 90min similarly, and thus, the game clock which copes with different time limits with a high precision is attained. |
