Lighting control system with priority override

Details Lighting control system with priority override Lighting control system with priority override

1993-02-12

1994-10-18

Pascal, Robert J.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Electric switch controlled by the radiant energy responsive...

315149, 315154, 315158, 315302, 315DIG4, H05B 3702

Patent

active

053571703

ABSTRACT:
An energy-saving lighting control system is selectively operable in either a normal mode, in which certain lighting parameters (e.g., maximum and minimum light levels, fade rates, etc.) are preset and lighting level is determined by which of a plurality of inputs requires the least electrical power, or in an off-normal mode (e.g., a calibration or light-adjustment mode) in which certain parameters are adjustable by manually adjusting the position of a movable member, such as a wiper blade in a potentiometer. A microprocessor-based logic and control unit is adapted to automatically switch from the normal operating mode to the off-normal mode in response to movement of the movable member. After a predetermined time period following the most recent movement of the movable member, the logic and control unit stores the new level of the adjusted parameter, and returns to the normal operating mode. Preferably, the system has multiple outputs by which different types of fluorescent lamp ballasts can be controlled.

REFERENCES:
patent: 4139801 (1979-02-01), Linares
patent: 4461977 (1984-07-01), Pierpoint et al.
patent: 5155415 (1992-10-01), Schmidt

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