| 摘要 |
<p>PURPOSE:To avoid an unreasonable drive in a long range drive by providing a time display means with a plurality of display sections divided in a unit time and arranged in sequence and by turning on the lights of display sections in sequence in accordance with the elapsed drive time. CONSTITUTION:When a drive is started, the signal e1 of a drive sensor 1 is made H, and the signal CL of an oscillation circuit 2 is fed out of a division circuit 3 as a drive clock signal e3, then a quaternary counter 5 is reset, allowing a rest clock signal e3' to enter, and the display section L13 of an indicator 8 is turned on in red through an AND gate A19 and OR gate O1, e.g., for an elapsed preset time of three hours. On the other hand, a sexadecimal counter 4 counts clock signals every 15 minutes and sets flipflops F1,F2... in sequence, then turning on the lights of display sections L1,L2... in sequence. Thereby, the driver can immediately judge an increase of the drive time by looking at the indicator 8 and can avoid an unreasonable drive.</p> |
