The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 1999
Filed:
Aug. 27, 1997
Applicant:
Inventors:
Assignee:
Intermatic Incorporated, Spring Grove, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
307117 ; 340600 ; 315159 ; 361176 ; 2502084 ;
Abstract
A photo-control apparatus comprising a photo-control circuit that includes two or more photo-cells connected in parallel that respond to ambient light. The circuit includes a switch that connects a power source to a load. When the photo-cells are exposed to ambient light, current flows through the parallel photo-cells operating the switch which disengages the load from the source. The plural parallel photo-cells in the photo-control circuit provide for improved reliability and have the potential to cost less to manufacture than a single photo-cell as used in a conventional photo-control circuit.