Automatic switch-off circuit
专利汇可以提供Automatic switch-off circuit专利检索，专利查询，专利分析的服务。并且PURPOSE: To remove the waste of power due to forgetting of putting out a light and save power consumption since the lighting of the lamp at stairs, a corridor, or the like becomes possible with one touch on a push buttom and it goes out automatically at an accurate set time if one releases the hand from the switch.
CONSTITUTION: This circuit is connected in series between the lamp 1 of load and an AC power source 2. This circuit is composed of a diode bridge 5 for letting a load current flow, on this output side, a thyristor 6 for turning on and turning off load current, a trigger circuit 7 consisting of a resistor 10 in which a gate electrode for turning on this flows and a capacitor 11, a thyristor control circuit 8 consisting of a transistor 14 for performing on-off control on the gate side of the thyristor 6 and a time constant circuit 18 consisting of RC for setting operation time and diodes 16 and 17 for obtaining the sufficient operation voltage, and a push button switch 3 for turning on the thyristor and starting the time constant circuit 18 from zero.
COPYRIGHT: (C)1992,JPO&Japio，下面是Automatic switch-off circuit专利的具体信息内容。
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