School bus stop sign and crossing arm apparatus

Details School bus stop sign and crossing arm apparatus School bus stop sign and crossing arm apparatus

1982-09-22

1985-12-17

Caldwell, Sr., John W.

Communications: electrical

Digital comparator systems

340133, 340 81R, 116 28R, 116 63R, B60Q 146

Patent

active

045595186

ABSTRACT:
An electrically-powered school bus sign and crossing arm apparatus mounts on the school bus body. A uni-directional DC motor and associated linkage and limit switch controls are used to deploy and retract the stop sign blade and crossing arm.

REFERENCES:
patent: 2144813 (1939-01-01), Roan et al.
patent: 2384689 (1943-04-01), Moose
patent: 3153398 (1964-10-01), Runkle et al.
patent: 4138668 (1979-02-01), Latta, Jr. et al.
patent: 4339744 (1982-07-01), Latta, Jr.

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