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:
Oct. 25, 1977
Filed:
Feb. 20, 1976
Applicant:
Inventors:
Robert Dale Zeller, Newark, OH (US);
Daryl Dean Sullivan, Newark, OH (US);
Assignee:
Johns-Manville Corporation, Denver, CO (US);
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
356229 ; 356256 ;
Abstract
The measurement of equivalent sphere illumination on a given task located in a lighted area is disclosed herein. This is accomplished by comparing a movably mounted task in the lighted area with the same task in a control area illuminated with sphere illumination. The task is viewed alternatively in the two areas in accordance with specific optical procedures to determine the equivalent sphere illumination on the task in the lighted area.