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. 20, 1979
Filed:
Jan. 18, 1977
Carol H Eubank, Greenwood, IN (US);
Carroll D Hays, Indianapolis, IN (US);
Noble E Wickliff, Indianapolis, IN (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A high voltage breakdown test circuit for testing of insulation resistance within an electrical device is disclosed. Operator safety is attained by allowing a fixed amount of energy considered nonlethal and advantageously imperceptible into the test circuit and by the internal system design. The system elements are connected in series and must all function properly in order to deliver the output signal to the device under test. Each system element obtains its power from the fixed energy input and is thereby activated only during an actual test. Indicator means of the pass/fail type provide an operator with a quick visual indication of the results of an insulation resistance test.