CRT With magnetic shield

Details CRT With magnetic shield CRT With magnetic shield

1982-01-20

1984-08-21

LaRoche, Eugene R.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313406, 313479, 313242, H01J 2902

Patent

active

044672411

ABSTRACT:
A glass funnel for a cathode ray tube is formed by centrifically casting it in a rotating mold. Integrally formed lugs are formed on the interior wall of the funnel. The lugs vary in geometry and are utilized to position and attach a magnetic shield to the funnel. The funnel and its attached magnetic shield forms a subassembly that is independent of the remainder of the cathode ray tube components.
A method is set forth for fabricating the funnel and the attached lugs by centrifugally spinning molten glass within a mold.

REFERENCES:
patent: 2951167 (1960-08-01), Kegg et al.
patent: 3735179 (1973-05-01), Kaplan
patent: 3821583 (1974-06-01), Steiner
patent: 3971490 (1976-07-01), Conger
patent: 4229675 (1980-10-01), Matsuki et al.

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