Selective illumination
Patent 4225808 Issued on September 30, 1980. Estimated Expiration Date: 
June 5, 1998. 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.
June 5, 1998. 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 References 3446976 3459961 3500455 3573543 3898383 InventorAssigneeApplicationNo. 05/912442 filed on 06/05/1978US Classes:315/307, Automatic regulation250/205, Controlling light source intensity250/221, Controlled by article, person, or animal307/116, Condition responsive315/154, Selective electric switch controlled by the radiant energy responsive device315/194, REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS315/360, TIME-CONTROLLED340/541, Intrusion detection362/125WITH SHOWCASE OR SHOW WINDOWExaminersPrimary: LaRoche, Eugene R.Attorney, Agent or FirmInternational ClassH05B 37/02 (20060101)AbstractDifferent portions of an area are selectively highlighted in response to observer proximity. An adjustable dimmer establishes the non-highlight illumination level for each area. The dimmer is overridden by observer-sensing circuitry to produce the highlight illumination level.Field of SearchSelective electric switch controlled by the radiant energy responsive deviceElectric switch controlled by the radiant energy responsive device REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS Discharge control discharge device in the control circuit CURRENT AND/OR VOLTAGE REGULATION Automatic regulation TIME-CONTROLLED PLURAL CONTROL STATIONS ELECTRIC SWITCH IN THE SUPPLY CIRCUIT | |
