Abstract: This relates to an apparatus for progressively heating wire and strip from one end to the opposite end thereof for the purpose of annealing the wire and strip or like function. The wire or strip is wound in a spiral groove formed in a drum which is formed of electrically conductive metal and is mounted in conjunction with a coil assembly to function as an armature of a D.C. generator. The power supplied to the coil assembly will be constant and the drum and the wire or strip wound thereon will function as a shorted armature of such D.C. generator so that all electrical energy induced into the drum and the wire will immediately be converted to heat energy. The drum is rotated at a selective speed with the rate of rotation of the drum controlling the amount of heat energy induced into the wire or strip.