| 摘要 |
The timer has a time indicator, a switching time adjuster, a comparator, and a control element with an alarm generator. The switching time adjuster feeds the ON intervals into a memory in a coded form. An address counter recalls the coded signals from various memory points in a succession and compares them with the electronic. clock actual time, represented by identical pulses. The connected electric devices are switched ON or OFF by a switching system, when the time set in the memory coincides with the actual time. Preferably a comparator is coupled to the memory and to the control element in order to compare the pulses step by step. On coincidence of a time value it activates an alarm stage which operates the switching system. |
