Bulb outage warning system

Details Bulb outage warning system Bulb outage warning system

1976-07-21

1978-01-10

Yusko, Donald J.

Communications: electrical

Digital comparator systems

328109, 328138, 340251, H04Q 120, H03K 2136

Patent

active

040682161

ABSTRACT:
A warning system for detecting a burned out or defective bulb for a motor vehicle is disclosed. A transmitting circuit is connected to detect current flow through the bulb to be monitored. Failure of the bulb to draw current causes the transmitting circuit to produce a series of small voltage pulses on the battery line. These pulses are detected by a receiving circuit which causes an outage indicator light to be illuminated.

REFERENCES:
patent: 3852713 (1974-12-01), Roberts et al.
patent: 3939413 (1976-02-01), Milkovic

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