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:
Dec. 31, 2002
Filed:
Mar. 20, 2002
Applicant:
Inventors:
Matthias Fenner, Wiesbaden, DE;
Frank Berger, Swisttal-Miel, DE;
Klaus-Jochen Froehlich, Dresden, DE;
Bernd Koehler, Dresden, DE;
Assignee:
Moeller GmbH, Bonn, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H 5/00 ; H01H 7/16 ; H01H 7/500 ; C21B 7/24 ;
U.S. Cl.
CPC ...
H01H 5/00 ; H01H 7/16 ; H01H 7/500 ; C21B 7/24 ;
Abstract
A system includes a switching device, a sound device and an evaluation device. The switching device includes a housing and a contact system disposed in the housing, the contact system including a contact piece carrier and a contact piece disposed on the contact piece carrier. The sound device produces and captures structure-borne sound waves so as to determine an equivalent criterion for determining the remaining service life of the contact piece. The evaluation device evaluates the equivalent criterion.