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:
Oct. 21, 2008
Filed:
Sep. 30, 2004
Jean-luc Lamarche, Mittelhausbergen, FR;
Manfred Strobel, Weingarten, DE;
Jean-Luc Lamarche, Mittelhausbergen, FR;
Manfred Strobel, Weingarten, DE;
i f m electronic GmbH, Essen, DE;
Abstract
An electronic switching device, which operates without contact, includes a single sensor element (), a clock generator, which can be provided internally or which can be connected externally, an evaluation circuit (), and an electronic or electromechanical switch (), which is provided on an output side. The evaluation circuit () includes diversity processing units (), and a checking unit (), wherein an output signal of the sensor element () is delivered in succession to the processing units (), and that output signals of the processing units () are checked for consistency by the monitoring unit (). Advantageously, with only a single sensor element (), category 4 of EN 954-1 or safety level SIL 3 of EN 61508 requirements can be achieved.