| 摘要 |
The control system comprises a combination of a timer device and a switching circuit. The timer device comprises a clock circuit for dividing a signal of a predetermined duration into a plurality of signals on the basis of time division and for sequentially producing the plurality of divided signals at a plurality of output terminals, a time setting circuit for setting a desired time, and circuit means for sequentially comparing the time which is set by the time setting circuit with the plurality of output signals from the clock circuit so as to produce an output when the logical condition represented by the clock circuit coincides with or becomes just opposite to the logical condition of the time setting circuit. The switching circuit comprises an automatic switching circuit which is connected to receive the output of the timer device, a first holding circuit, a second holding circuit, a manually operated switch and a load switch which are constructed and arranged such that when the automatic switching circuit is operated, the first holding circuit is controlled by the operation of the manually operated switch. Upon the automatic switching circuit being operated, the manually operated switch is maintained in the inoperative condition by the second holding circuit, that the first holding circuit is controlled by the operation of the automatic switching circuit, and that the load switch is controlled by the first holding circuit.
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