Vehicle back-up alarm

Details Vehicle back-up alarm Vehicle back-up alarm

1974-10-29

1976-03-09

Pitts, Harold I.

Communications: electrical

Audible indication

Ultrasonic pest control

340 70, B60Q 300

Patent

active

039435075

ABSTRACT:
A solid state alarm circuit for producing intermittent alarm signals when a vehicle is operated in reverse. The circuit includes a sound generator modulated by a pulse generator to produce bursts of oscillations which drive sound producing loudspeakers.

REFERENCES:
patent: 3284796 (1966-11-01), Borsattino
patent: 3728676 (1973-04-01), Brown

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