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:
Apr. 26, 1977
Filed:
Mar. 25, 1976
Applicant:
Inventors:
Ryszard Kitajewski, Broxbourne, EN;
Anthony William Sweet, Stortford, EN;
Michael Philip Dyer, Old Harlow, EN;
Assignee:
International Standard Electric Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04M / ;
U.S. Cl.
CPC ...
179 / ; 1791 / ; 3241 / ;
Abstract
A Hall effect device is employed to monitor the presence and direction of line current flow. The output of the Hall effect device is fed to an amplifier having a known output level for a zero input. The output of the amplifier will increase or decrease dependent on the direction of the current flow. The output of the amplifier is monitored for change and direction of change of current flow.