Abstract: A furnace for the inductive heating of metallic workpieces with an induction coil body encompassing a furnace space through which workpieces on receivers are transported. The receivers are a pair of hollow tubes extending in parallel through the furnace space for receiving workpieces, the tubes being reciprocally moved backwards and forwards. A pair of rods having cam surfaces thereon extend through the space below the tubes so that rotation of the rods lifts the workpieces off the tubes during backwards movement.

Abstract: A system for induction heating of workpieces which are transported touching or in close proximity through a succession of inductor coils along the workpiece axes. A grounded feeder supplies workpieces to the transporting structure and a grounded further processing machine receives the workpieces after heating. To eliminate sparking and corrosion problems, the AC currents fed to the coils are adjusted, for example by feeding currents in phase opposition to different coils, so that the potential along the direction of the workpieces from the first to last coil is substantially zero.

Abstract: A continuous heating induction furnace in which workpieces are mounted on a receiver for step-wise movement from a furnace inlet to outlet through a longitudinally extending chamber. A pair of lifter rods extend through bores at the chamber floor to engage the workpieces at each of a plurality of stops or stations and are in turn rigidly connected to a bar element extending below the chamber. The receiver reciprocates along the longitudinal direction while the lifter rods elevate the workpieces during backward receiver movement. The receiver is formed as a pair of tubes which engage bearings mounted at separated locations along the chamber so that the length of the chamber is not limited by the sag characteristics of the receiver.

Abstract: A at discharge oven for heating a large number of production parts which pass through the oven on a conveyor belt and are pushed by a pushing mechanism mounted att the oven, evidence whereby the conveyor belt is attached to a swingable beam and a vibrator is mounted for exerting a force on the belts and parts thereon which has a component in a direction perpendicular to the direction of part movement through the oven.