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:
Jul. 06, 1976
Filed:
Jan. 15, 1975
Applicant:
Inventor:
Phillip J Cade, Winchester, MA (US);
Assignee:
Electronics Corporation of America, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ; G01J / ; H05B / ;
U.S. Cl.
CPC ...
356201 ; 250205 ; 315158 ; 315159 ; 356207 ; 356208 ;
Abstract
A precision lamp regulation circuit includes a source of AC power, a lamp connected in circuit with the AC source, a transistor switch connected in circuit between the AC source and the lamp, a light sensor optically coupled to respond to the radiation output of the lamp, circuitry for placing the transistor switch in conducting condition at the beginning of a half cycle of applied AC power, and a feedback circuit responsive to the light sensor for placing the transistor switch in non-conducting condition to terminate energization of the lamp during that half cycle of applied AC power.