Armature position sensor for a relayUnited States Patent Number: 5,483,214
AbstractA 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.
Number of Pages9
Citation InformationG. Stephen Perreira, Richard L. Kutin and Lanny V. Griffin. "Armature position sensor for a relay" United States Patent Number: 5,483,214 (1996)
Available at: http://works.bepress.com/lgriffin/6/