Union Switch & Signal, Inc.

Ripley Lighting Controls, LLC

N Rodger Williamson, Iii

Richard S Jones

Dale A Thomas

Hal Adair

Charles R Drafts

An improved lighting control for a luminaire operates an LED luminaire so that its relay opens and closes at or very near the zero current cross-over point so as to reduce the in-rush current to the luminaire, and, if the relay contacts do become stuck, the photo control senses the sticking and electronically vibrates the relay to free its contacts.

Photo control for a luminaire

A crossing guard maintenance system is disclosed for use with a disabled crossing guard control system. The crossing guard control system has a motor mechanically coupled to a crossing guard arm and a counterweight arm. The motor is used for moving the crossing guard arm between up and down positions. The maintenance system includes a function switch for alternating between normal and maintenance modes of the system. In maintenance mode, a diode is electrically connected to the motor to form a motor/diode circuit that provides a path for current when the polarity of the motor is reversed and it operates as a generator. The maintenance system also includes an electrical power source connected to a momentary switch for providing power to the motor. A method for using the maintenance system is also disclosed for use in repairing a disabled crossing guard mechanism.

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Leesville, SC, United States of America

N Rodger Williamson, Iii