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:
Jul. 09, 2002
Filed:
Mar. 10, 2000
Franz Josef Dold, Furtwangen, DE;
Jens Niehus, Strasbourg, FR;
Sick AG, Waldkirch, DE;
Abstract
A safety switching arrangement has at least two break switches ( ) which are connected in series to an evaluation unit ( ), in which case the evaluation unit ( ) initiates a safety signal, in particular an alarm signal and/or disconnection signal, when at least one of the break switches ( ) opens, and determines which of the break switches ( ) has opened. At least one, and preferably all, of the break switches ( ) has or have an associated code signal generator ( ) which, when the associated break switch ( ) opens, supplies to the evaluation unit ( ) a code signal which is characteristic of the relevant break switch ( ) via a line, in particular a diagnosis line ( ) or safety line sections ( ), which leads to the evaluation unit ( ) and is common to all the break switches ( ) associated with a code signal generator ( ), which code signal is analyzed in the evaluation unit ( ) and is identified as coming from the relevant break switch ( ).