System for control of lights and motors

Details System for control of lights and motors System for control of lights and motors

2006-06-06

2011-11-29

Zimmerman, Brian (Department: 2612)

Communications: electrical

Selective

Pulse responsive actuation

Reexamination Certificate

active

08068014

ABSTRACT:
A system for independent control of electric motors and electric lights includes a plurality of two-wire wallstations coupled in series via power wires between an alternating-current (AC) source and a light/motor control unit. The light/motor control unit is preferably located in the same enclosure as an electric motor and an electric light and has two outputs for independent control of the motor and the light. The light/motor control unit and the wallstations each include a controller and a communication circuit that is coupled to the power wiring via a communication transformer and communicate with each other using a loop current carrier technique. The light/motor control unit and the wallstations utilize pseudo random orthogonal codes and a median filter in the communication process.

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