PROXIMITY_CONTROL

Published:2009/7/13 2:27:00 Author:May | From:SeekIC

Gain of Hartley oscillator is set so oscillation is maintained only when Q of resonant circuit is normal. When ferrous or nonferrous materials come near pickup coil, Q is reduced, oscillation stops, and output tube conducts, to pull in relay for counting or for controlling industrial machinery. Can be set for operating range of from 1/8th inch to 1 foot.-D. Elam, Proximity Transducer Uses Rapid Relay, Electronics, 31:25, p73.



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