Vehicle mounted light activated control system

Details Vehicle mounted light activated control system Vehicle mounted light activated control system

1978-05-26

1981-02-03

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

250206, 250215, 307 10LS, 315 82, 315134, 315157, 315159, 340 31R, 340 53, G08G 100, B60Q 126

Patent

active

042491606

ABSTRACT:
A light activated control system, particularly for operating warning lights on a vehicle parked at night. The system includes a light sensor mounted on the vehicle and a comparator which triggers a time delay threshold device which switches on the warning lights for a predetermined period of about ten seconds only when the sensed light intensity increases through a threshold level due for example to the approach of a lighted vehicle. The system may alternatively be responsive to the rate of increase of sensed light level to switch on the warning lights.

REFERENCES:
patent: 3037144 (1962-05-01), La Mantia
patent: 3211951 (1965-10-01), Skinner et al.
patent: 3399378 (1968-08-01), Carter et al.
patent: 3665224 (1972-05-01), Kelsey
patent: 3683379 (1972-08-01), Saddler et al.
patent: 3790848 (1974-02-01), Lai
patent: 3793621 (1974-02-01), McIntosh
patent: 4093937 (1978-06-01), Habinger
patent: 4117453 (1978-09-01), Hodgson et al.
patent: 4117457 (1978-09-01), Latta

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