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. 09, 1988
Filed:
Oct. 17, 1985
Applicant:
Inventors:
Carlton M Slough, Spring, TX (US);
James H Bluhm, Katy, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324 64 ; 324 / ; 324557 ;
Abstract
An AC ohmeter is adapted for testing insulated pipe flanges where flammable substances are involved. It employs a low frequency, low voltage oscillator and includes a precision rectifier. The output of the rectifier is smoothed and applied to a dual comparator circuit such that high, low and intermediate resistance readings are obtained.