External magnetic field generating device

Details External magnetic field generating device External magnetic field generating device

1988-02-08

1989-03-14

Evans, Arthur G.

Recorders

Magnetographic

Magnetographic head

346 742, G01D 1500

Patent

active

048130079

ABSTRACT:
An external magnetic field generating device includes a pole piece mounted on a face of a magnetic plate, and a coil which is in contact with the face of the magnetic plate, the coil being wound flatly around the pole piece so that it spreads out radially. The coil generates a magnetic field through the pole piece when an electric current passes through the coil, the pole piece is projectable beyond the face of the coil opposite the magnetic plate.

REFERENCES:
patent: 4414554 (1983-11-01), Springer

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