Magnetic retention plate with permanent magnets

Details Magnetic retention plate with permanent magnets Magnetic retention plate with permanent magnets

1986-06-20

1987-07-07

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Work or object holding type

335285, H01F 704

Patent

active

046790217

ABSTRACT:
Longitudinal and transverse rows of pole pieces are flanked by pairs of rows of fixed permanent magnets in one direction and by movable permanent magnets in another direction and are mounted on a magnetic or nonmagnetic base plate. An actuating mechanism for the movable permanent magnets enables the displacement thereof by one pole pitch so that in one position all four sides of each pole piece are flanked by magnetic poles of the same polarity so that the flux lines close through the active face of the magnetic retention plate. In the other position, pairs of permanent magnets confronting the opposite sides of the pole pieces are of opposite polarity so that flux line closure is entirely within the body of the plate.

REFERENCES:
patent: 4468648 (1984-08-01), Uchikune
patent: 4468649 (1984-08-01), Matsuhashi
patent: 4575702 (1986-03-01), Nitta et al.

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