1
Nishizawa Junichi: Position control system using magnetic force. Handotai Kenkyu, Burns Robert E, Lobato Emmanuel J, January 29, 1974: US3789285 (50 worldwide citation)

The position control system using magnetic force, in which at least one pole of an electromagnet is opposed to a magnetic substance of a controlled object through an air gap therebetween so that a magnetic circuit including the magnetic substance, the air gap and the electromagnet is provided. The w ...


2
Position control system using magnetic force. Handotai Kenkyu Shinkokai, February 11, 1976: GB1424413-A (5 worldwide citation)

1424413 Automatic control of position HANDOTAI KENKYO SHINKOKAI 27 March 1973 [27 March 1972] 14540/73 Heading G3N [Also in Division H1] An object 1, e.g. a mark of a photo-etching or evaporative deposition apparatus, is positioned by an electromagnet 27 acting on magnetic material attached to the o ...