Single zone lighting controller
Patent 4461977 Issued on July 24, 1984. Estimated Expiration Date: 
December 1, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 1, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesConstant illumination control system Photodetector timer network Automatic lighting control system Switch for controlling the operation of a light source in response to the presence of a moving person or object and in response to the magnitude of ambient light not provided by the light souce Patent #: 4305021 InventorsApplicationNo. 06/445877 filed on 12/01/1982US Classes:315/159, Electric switch controlled by the radiant energy responsive device315/308, Regulator responsive to plural conditions315/360, TIME-CONTROLLED315/361PLURAL CONTROL STATIONSExaminersPrimary: Dixon, Harold A.Attorney, Agent or FirmInternational ClassH05B 37/02 (20060101)AbstractThe single zone lighting controller controls the lights in a zone or area integrating external control signals for daylighting and occupancy with a local override function. The daylighting signal is from a master photoelectric control, and occupancy signal is from a time-clock or electronic occupancy sensor; the local override, activated by an occupant provides a fixed override period before the single zone lighting controlled again responds to the external control signals. Shortly before the override period is over, the single zone lighting controller warns the occupant, e.g., by blinking the lights that the override is about to end. | |
