Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1986-10-31
1988-04-19
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313408, H01S 2907
Patent
active
047392177
ABSTRACT:
An improved front assembly for a color cathode ray tube having a tension foil shadow mask is disclosed. The faceplate of the tube has on its inner surface a centrally disposed phosphor screen surrounded by a peripheral sealing area adapted to mate with a funnel. A shadow mask support structure is provided for securing a shadow mask in tension on the structure and spacing the shadow mask from the screen. The support structure includes an upper, flattened ridge for securing the shadow mask to the support structure. A plurality of legs depend from the ridge and at least a series of the legs is flared outwardly from one side of the ridge to facilitate securing the support structure to the faceplate and to stabilize the support structure under the tension of the shadow mask.
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"The CBS-Colortron: A Color Picture Tube of Advanced Design", N. F. Fyler, W. E. Rowe, C. W. Cain.
"A High-Brightness Shadow Mask Color CRT for Cockpit Displays", Robinder, Bates, Green, Lewen and Rath, Tektronix, Inc., Beaverton, Oreg.
Fendley James R.
Kraner James L.
Moore David K.
O'Shea Sandra L.
Zenith Electronics Corporation
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