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:
Jan. 30, 1996
Filed:
Nov. 23, 1994
Karl-Otto Schollkopf, Esslingen, DE;
Werner Bohm, Weinstadt, DE;
Gerhard Kellings, Moers, DE;
Michael Bollerott, Essen, DE;
Klaus Scherer, Dusseldorf, DE;
Thyssen Aufzuge GmbH, Neuhausen, DE;
Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Munich, DE;
Abstract
The invention relates to a monitoring device for a control unit having a ety chain. In accordance with the invention, the monitoring device has a testable switching device which is provided with input and output terminals such that a monitoring loop may be set up from a plurality of testable switching devices and a sequence of digital signals can, in particular, be transmitted via this loop as a continuous signal so that a 'digital stand-by current loop' is obtained.