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:
Feb. 15, 1977
Filed:
Nov. 12, 1975
Applicant:
Inventor:
Alfred J Henderson, Jr, Hendersonville, NC (US);
Assignee:
General Electric Company, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250208 ; 356121 ;
Abstract
Instrument for measuring the quality of light illuminating a work area. The device comprises four photocells arranged in a cubical housing facing in different directions and connected to calibrated operational amplifiers and an analog divider. A volt meter with suitably calibrated scale is connected to the analog divider to provide a direct reading of the ratio of quantity of light from the different directions.