Color cathode ray tube having laminar flow promoting studs in fa

Details Color cathode ray tube having laminar flow promoting studs in fa Color cathode ray tube having laminar flow promoting studs in fa

1977-03-21

1978-05-02

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

220 21A, H01J 2907, H01J 2902

Patent

active

040877175

ABSTRACT:
This disclosure depicts a color cathode ray tube including a shadow mask and improved suspension means for suspending the mask adjacent to the flangeless faceplate of the tube. The improved suspension means comprises a plurality of metal studs spaced about the periphery of the shadow mask assembly and outside the viewing area of the faceplate. The studs are characterized by having an intermediate part which has in its cross-section a non-circular profile tapering gradually in a radially inwardly direction to a blunt extremity so as to present to radially out-rushing screening fluid an initially narrow, gradually expanding profile which promotes laminar flow of screening fluid around the stud during the radial flow suffusion process. The effect is to inhibit screening fluid wash back and consequent formation of permanent, visible wave patterns in the coating upon drying.

REFERENCES:
patent: 3890526 (1975-06-01), Palac
patent: 3986072 (1976-10-01), Adamski

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