Automatic light control for automotive vehicles

Details Automatic light control for automotive vehicles Automatic light control for automotive vehicles

1980-04-09

1983-03-15

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Special application

Vehicle

315 83, 307 10LS, 340 76, B60Q 102

Patent

active

043769098

ABSTRACT:
An automatic light control for automotive vehicles includes a relay connected to a power source by way of a main switch and an electronic switch, and a control circuit for on-off control of the electronic switch. In the control circuit, a brightness sensor produces a signal representing the ambient brightness which is compared with a predetermined reference signal by comparator means. The electronic switch is turned on or off in response to the difference in output of the comparator means to energize or deenergize the relay to thereby turn the vehicle lights on or off. The control may include two main light control circuits of identical configuration arranged in parallel, each of which serves as a back-up circuit for the other, and a monitor circuit adapted to issue an alarm when the two circuits produce unequal outputs.

REFERENCES:
patent: 3270245 (1966-08-01), Keeran
patent: 3775639 (1973-11-01), Woodward
patent: 4045769 (1977-08-01), Faller
patent: 4117453 (1978-09-01), Hodgson et al.
patent: 4139801 (1979-02-01), Linares
patent: 4236099 (1980-11-01), Rosenblum
patent: 4249160 (1981-02-01), Chilvers

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