INDUCTANCE COIL FOR HEATING INNER SURFACES WITH LOW DISTANCE BETWEEN SIDES TO BE HEATED Russian patent published in 1999 - IPC

FIELD: devices for continuous serial annealing of articles, for example, side chutes of coal conveyor belts. SUBSTANCE: device has members of inductance wire and magnetic circuit plates which are mounted on them. Current-conducting pieces are arranged in series along longitudinal axis of articles to be heated with step which provides enough space for mounting magnetic circuit plates on them at right angle with respect to current conductor. EFFECT: increased efficiency of heating inner surfaces which are spaced by distance which is less than turn of coils and double space between it and surface to be heated. 2 dwg