Aperture mask unit for color television picture tube

Details Aperture mask unit for color television picture tube Aperture mask unit for color television picture tube

1976-11-05

1978-07-04

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

H01J 2907, H01J 2902

Patent

active

040990869

ABSTRACT:
In a rectangular aperture mask unit for a color television picture tube composed of a thin metal sheet presenting a mask region of generally rectangular form and a peripheral flange surrounding the mask region and extending at an angle thereto, and a metal frame enclosed by the flange in a telescoping manner and fastened thereto by a plurality of spot welds distributed around the periphery of the flange, the flange is provided, at each corner of the unit, with two spaced cutouts extending from the edge of the flange remote from the mask region and defining a tongue which is curved in the direction of the periphery of the flange, the length of the cutouts being equal to at least one-half the height of the flange, and each tongue is fastened to the frame by at least one spot weld.

REFERENCES:
patent: 3479546 (1969-11-01), Mears
patent: 3581135 (1971-05-01), Garrett et al.
patent: 3601650 (1971-08-01), Pappadis
patent: 3862448 (1975-01-01), Ishizuka et al.

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