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:
Apr. 19, 2011
Filed:
Sep. 29, 2006
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);
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);
Rockwell Automation Limited, Kiln Farm, Milton Keynes, GB;
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.