Direction warning indicator energizing circuit

Details Direction warning indicator energizing circuit Direction warning indicator energizing circuit

1973-07-02

1976-10-05

Curtis, Marshall M.

Communications: electrical

Selective

Having indication or alarm

340340, B60Q 146

Patent

active

039848108

ABSTRACT:
Sets of lamps arranged in adjacent opposed arrowhead configurations with each lamp energized by means of individual switching transistors having base drive voltages coupled through a multi-position switch to timing signals. The timing signals are generated by sequentially actuated flip-flops energized in response to impulses from a master clock and gating circuitry. Opposite directions are indicated by selectively energizing three sets of lamps forming three adjacent arrowheads, sequentially, in one direction, three similar sets in another direction, or by steadily illuminating one set of lamps forming an arrowhead while sequentially energizing lamps forming a shaft.

REFERENCES:
patent: 3479641 (1969-11-01), Summers
patent: 3493956 (1970-02-01), Andrews et al.
patent: 3622980 (1971-11-01), Elledge, Jr.
patent: 3747063 (1973-07-01), Hudson

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