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PHOTOGRAPHIC_DRYER_CONTROL

2014-11-29 00:37  
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PHOTOGRAPHIC_DRYER_CONTROL
Copper drum, serving as single-turn shorted secondary of transformer, is heated by several thousand amperes of induced current. As drum heats up, transformer primary current decreases. When desired temperature is reached, KA energizes and T1 is disconnected by KB.-D. A. Senior, Temperature Control for Hot Rollers in Industry, Electronics, 32:30, p 40-42.