Sensalight

Claim 1

In an electrical circuit, the combination of means whereby a resident jingles his keys outside of his home, and said means turns on an outside light of said home so that said resident more easily finds a door key hole, and said means turns on lights or appliances inside said home, said means incorporating a transducer mounted next to a doorbell for receiving sound waves of said jingling keys and converting said sound waves into electrical pulses wherein said circuit includes three stages for (amplifying) said pulses and a capacitor and (inductor) through which all said frequency pulses, except 38.5 KHZ is sent to a ground of said circuit wherein the 38.5 KHZ frequency component is passed to a base of a transistor, T4 which pulses a gate of a (semiconductor,) SCR1 which latches on through transistor T5 and supplies continuous gate to a (semiconductor) SCR3 to turn on said lights and wherein said T4 transistor also supplies a continuous gate to (semiconductor) SCR2 for timing said circuit, said circuit further including a PUT device which turns on when its anode voltage rises above its gate voltage, thus taking the base of said T5 transistor down, and thus (turning) off said T5 transistor, (semiconductors) SCR1, SCR2, SCR3 and said lights.