Inventors:
Julian Poyner - Stockport, GB
David T. Williams - Crickhowell, GB
Gillian P Parker - Wigan, GB
David Howard Kerr - Burscough, GB
Derek W Jones - Borgue, GB
Derek Sawyer - Granada, ES
Geoffrey Alan Talbot - Wigan, GB
William E Anderson - Cincinnati OH, US
Michael R. Scharnick - Brookfield WI, US
Stephen Zbytowski - Oak Creek WI, US
Assignee:
Rockwell Automation Limited - Kiln Farm, Milton Keynes
International Classification:
H01H 27/00
Abstract:
There is provided a safety switch having a housing configured to receive a removable key, and a mechanism arranged to be operated when the key is moved from an engaged position to a partially disengaged position, the mechanism being arranged to cause a signal to pass to a separate apparatus, wherein the safety switch further comprises a lock which is controlled by the separate apparatus and is arranged to prevent the key from being fully disengaged from the safety switch until a signal has been received in response from the separate apparatus.