A sensor for use with high-power solenoid-actuated relays, and for detecting and signalling relay armature position and hence the actuation state of the relay. The sensor is external to a sealed chamber in which the relay contacts and armature system are positioned, and includes a permanent magnet, the flux path of which includes the relay armature and base. Armature movement to close the relay alters the flux path to operate a reed switch adjacent the magnet, and the condition of the reed switch signals the unactuated or actuated state of the relay.


Biomedical Engineering and Bioengineering

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Also available from the United States Patent and Trademark Office. Website: http://www.uspto.gov.



URL: http://digitalcommons.calpoly.edu/bmed_fac/61