Arrangements for improving the operating reliability of electronic equipment, e.g. by providing a similar standby unit

Electric redundant control systems Error detection or correction of data by redundancy in digital computer hardware Security signalling or alarm systems Redundant emergency protective circuit arrangements Arrangements for parallel feeding of a single network Circuit arrangements with stand-by power supply Modifications for increasing the reliability of logic circuits or inverting circuits Fail-safe logic circuits or inverting circuits Redundant clock signal generation in generators of electronic oscillations or pulses Transmission systems using redundant channels or apparatus Redundant apparatus for increasing reliability of arrangements used for the transmission of digital information.