Apparatus or systems have function elements, for example final control elements as motors, generators as radiation generators, control/regulating means, etc. Their function, as well as satisfying their function, are monitored by processors. In particular, reliability-relevant or safety-relevant monitorings...http://www.google.ca/patents/US5303143?utm_source=gb-gplus-sharePatent US5303143 - Monitoring circuit for a multiprocessor means of an apparatus or of a system
