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. 17, 2001
Filed:
Jul. 30, 1999
Applicant:
Inventor:
Friedrich Lenhard, Hanau, DE;
Assignee:
Vacuumschmelze GmbH, Hanau, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/300 ;
U.S. Cl.
CPC ...
G01R 3/300 ;
Abstract
Current sensor with a magnetic core (,) on which, besides a primary winding (,) in which the current to be measured (i) flows, at least one secondary winding (,) is wound, into which winding an alternating current that is generated by a generator circuit (,to,to,) is fed, said current saturating the magnetic core (,) in alternating fashion in at least one direction, whereby the generator circuit is self-running, whereby the polarity of the alternating current generated by the generator circuit (,to,to,) alternates depending on the current flowing in the secondary winding (,) and on at least one threshold value for this current.