Beam adjustment assembly for a cathode ray tube

Details Beam adjustment assembly for a cathode ray tube Beam adjustment assembly for a cathode ray tube

1975-10-21

1977-06-28

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335210, H01F 700

Patent

active

040328724

ABSTRACT:
A nonmagnetic supporting member is adapted to surround a picture tube neck portion and includes a first collar having a plurality of circumferentially spaced cam-receiving apertures and a captivating collar spaced from the first collar, the supporting member including a clamp arrangement for fixedly mounting the member to the tube neck. A plurality of rotatable magnetized rings are mounted adjacent to the captivating collar and a rotatable second collar is mounted between the magnetized rings and the first collar. The second collar includes a plurality of ramp portions which, when rotated by tabs located on the first and second collars to locate the ramps within the apertures, unlocks the magnetized rings to enable adjustment. A second set of tabs formed on the first and second collars permit rotation of the ramp portions out of the apertures which increases the pressure on the magnetized rings between the captivating and first collars for effectively locking the rings in position.

REFERENCES:
patent: 2972074 (1961-02-01), Vasilevskis
patent: 3305744 (1967-02-01), Werst
patent: 3332046 (1967-07-01), Melone

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