Electrical conduction means for use in tension mask color cathod

Details Electrical conduction means for use in tension mask color cathod Electrical conduction means for use in tension mask color cathod

1986-12-30

1988-04-19

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313466, 313477HC, H01J 2928, H01J 2988

Patent

active

047392150

ABSTRACT:
A color cathode ray tube is disclosed having an envelope including a faceplate with an electrically conductive screen, and a funnel having an electrically conductive film on its inner surface charged to a high electrical potential. An electrically insulative glass shadow mask support assembly is sealed between the faceplate and the funnel has a shelf extending into the envelope for mounting a metallic foil shadow mask in tension adjacent to the screen. The shelf has at least one hole therethrough for receiving electrical conduction means according to the invention. The electrical conduction means includes a center member for insertion into the hole, and contacting means at both extremities for contacting the electrically conductive coating on the funnel, the shadow mask, and the metallic film on the screen. As a result, and according to the invention, the high electrical potential on the conductive film of the funnel is electrically conducted through the electrically insulative glass shadow mask support assembly to the shadow mask and the screen to establish the components at a common high potential.

REFERENCES:
patent: 3432803 (1969-03-01), Nice
patent: 3898510 (1975-08-01), Davis et al.
patent: 4333033 (1982-06-01), Cordingley et al.
patent: 4344015 (1982-08-01), Marchka
patent: 4450379 (1984-05-01), Kikuchi et al.
patent: 4652791 (1987-03-01), Palac et al.

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