Interlocking periodic permanent magnet assembly for electron tub

Details Interlocking periodic permanent magnet assembly for electron tub Interlocking periodic permanent magnet assembly for electron tub

1992-09-02

1994-08-02

Lee, Benny T.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

29600, 335210, 335306, H01J 23087

Patent

active

053349105

ABSTRACT:
The present invention is a periodic permanent magnet (PPM) assembly used to produce a focussing field within an electron tube, and the corresponding method of manufacturing the same. The present invention PPM includes producing two opposing semi-cylindrical stacks by alternately stacking semi-annular shaped magnets and pole pieces. Once the two semi-cylindrical stacks are formed, they are joined around the electron tube, such that the various pole pieces and magnets of the two semi-cylindrical stacks align. As a result of the joining of the two semi-cylindrical stacks, a cylindrical periodic permanent magnet assembly is formed around the electron tube in a cost effective and labor efficient manner.

REFERENCES:
patent: 3221204 (1965-11-01), Hant et al.
patent: 3617802 (1971-11-01), Manoly
patent: 3644771 (1972-02-01), Kennedy et al.
patent: 3971965 (1975-03-01), Baker et al.
patent: 4392078 (1983-05-01), Noble et al.
patent: 4668893 (1987-05-01), Amboss

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