Light switch delay circuit

Details Light switch delay circuit Light switch delay circuit

1982-07-06

1983-06-21

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Time-controlled

307141, 315199, 315291, H05B 3900

Patent

active

043895999

ABSTRACT:
A delay circuit comprising two leads adapted to be connected across a light switch for delaying the turn off of a light bulb after the switch has been turned off. A silicon controlled rectifier (SCR) is connected across the two leads for applying power to the bulb when the SCR is on. An integrated circuit including an oscillator and a counter provides an output to the gate of the SCR for a predetermined time period following the opening of the switch for enabling the SCR to turn on.

REFERENCES:
patent: 3732484 (1973-05-01), McKenna
patent: 4082961 (1978-04-01), Genuit
patent: 4204149 (1980-05-01), Cleary et al.
patent: 4336464 (1982-06-01), Weber

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