Leakage flux canceling device

Details Leakage flux canceling device Leakage flux canceling device

1996-07-18

1999-02-23

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

315 8, 315 85, 348819, H01F 502, H01J 2906

Patent

active

058748792

ABSTRACT:
A leakage flux canceling device is provided which requires a small number of parts and which has high space factor. A leakage flux canceling device 30 is mounted to a funnel side of a deflecting apparatus for reducing leakage flux to a panel side attributable to a horizontal deflection magnetic field, and comprises a ring-like body 32 having flanges 32 facing each other, a pair of bobbins 40 and 60 without cores formed on the flanges, a canceling coil 34 wound on each of the bobbins for canceling leakage flux, and winding grooves 48 and 68 formed in the respective bobbins such that the winding of each canceling coil has a greater length in the circumferential direction, and permitting the canceling coils to be wound from the outer surface side of the corresponding bobbins. The bobbins and the ring-like body are formed as a one-piece body, and the bobbins each have an arcuate shape matching the ring-like body.

REFERENCES:
patent: 5036246 (1991-07-01), Germani
patent: 5220241 (1993-06-01), Kanazawa et al.
patent: 5355107 (1994-10-01), Hwang et al.
patent: 5448212 (1995-09-01), Ohtsu et al.

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