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:
Nov. 16, 2010
Filed:
Sep. 18, 2009
Applicants:
Michael Naumann, Feucht, DE;
Markus Miklis, Pfeifferhütte, DE;
Inventors:
Michael Naumann, Feucht, DE;
Markus Miklis, Pfeifferhütte, DE;
Assignee:
Ellenberger & Poensgen GmbH, Altdorf, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 15/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
In order to detect and evaluate changes in current as a result of electric arcs, a sensor signal, differentiated on the basis of time, is produced with a sensor-dependent frequency bandwidth whose upper cutoff frequency is 40 MHz and whose lower cutoff frequency is 100 kHz. The sensor signal is taken and an evaluation signal is produced with an upper cutoff frequency of less than or equal to 10 MHz. The evaluation signal is compared with a threshold value and a normalized signal is produced, and a pulse duration of the signal is extended to a prescribed time value.