| 摘要 |
PURPOSE:To set a desired time simply, by a method wherein a single time adjusting switch is used and an adjusting digit is altered to select a quick or delay feed with a proper change of the way of closing the switch. CONSTITUTION:When a time mode change button 6 is depressed, a mode selection means 20 indicates an adjustment on a display section. When an advance button 7 is depressed, a one-shot multivibrator 30 adds 1 to a decimal increment counter 25 through a switch 23. As the depression of the button 7 exceeds 1sec, an output of a continuous depression detecting means 31 to turned to 'H' to be applied to an AND circuit 32. As the other input is a 1Hz signal from a frequency divider 22, an AND output give a 1Hz pulse which is provided to a divided by 6 notation increment counter 26 through a switch 24 to count 1 per sec. An output of the continuous depression means 31 is also applied to a reset terminal 25a of the decimal increment counter 25 and in a 10min adjustment with a continuous depression, the counter 25 is reset to nullify a 1min display. Thus, an operator can adjust time simply by selecting the advance button 7, a delay button 8 and the way of depression. |
