|
After Corning Glass works developed *devitrifying frit* and the frit-seal process was introduced for the all-glass 21CYP22 (1958), most color CRTs have been assembled in that manner. The frit-sealed glass panel and funnel quickly surpassed a variety of less successful methods of color crt assembly. If this process had been developed a few years earlier, my avatar might be displaying a picture, as the primitive but complicated panel to funnel seals are the main source of leaks in these CRTs.
When RCA went back to the metal funnel for the 21AXP22 the troublesome glass funnel-to flange and panel-to-flange seals of the 15GP22 were eliminated.
jr
Last edited by jr_tech; 02-28-2010 at 12:44 PM.
Reason: add info
|