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Light sensitive lamp adapter

  • US 4,023,035 A
  • Filed: 12/12/1974
  • Issued: 05/10/1977
  • Est. Priority Date: 12/12/1974
  • Status: Expired due to Term
First Claim
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1. A light-sensitive lamp adapter comprisingA. an opaque housing having first and second ends and a first cavity opening into the first end,B. a lamp socket shell positioned in said cavity,C. a lamp base having a base shell and secured to the second end,D. means electrically interconnecting the shells,E. first and second center contacts in the bottoms of said socket and base shells, respectively,F. means defining a plurality of fixed windows in the housing distributed in a circle all around the longitudinal axis of the housing, at least one said window being separated from an adjacent window by an area of said opaque housing,G. a switch in the housing connected for conduction between the center contacts,H. a photocell positioned in the housing adjacent the fixed windows and fixed to said housing, said photocell aligned to be illuminated by light from any direction about the longitudinal axis of said housing, for controlling the switch so that the switch turns on or off depending upon the intensity of the light incident on the photocell, andI. movable window means rotatively mounted on the housing for movement in a circle all around said axis for selective alignment with any one of the fixed windows so that ambient light from any given direction can be incident on the photocell, the area of said movable window being no greater than said opaque housing area so that when said movable window is aligned with said opaque area no light reaches said photocell.

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