Hazard warning circuit

Details Hazard warning circuit Hazard warning circuit

1980-05-05

1982-04-13

La Roche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315 77, 315226, 340 81F, B60Q 152, B60Q 138

Patent

active

043250076

ABSTRACT:
A turn-signal flasher circuit for automotive vehicles wherein a turn-signal switch controls one of two turn-signal lamp circuits, and in which a hazard warning switch controls both lamp circuits simultaneously. A pulse generator controls the frequency of the flashing light output of the lamps. A second pulse generator, having a mark-to-space ratio which is substantially less than the mark-to-space ratio of the first generator, is responsive to the hazard warning switch to control frequency of the simultaneous flashing of both lamp circuits during the hazard warning operation of the flasher circuit. Accordingly, battery drain is reduced and a longer period of hazard warning operation is attainable.

REFERENCES:
patent: 3740714 (1973-06-01), Ballou
patent: 4258292 (1981-03-01), Kassfeldt

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