Color television picture tube and mating support members for mounting the color selection mask within the tube

Claim 1

IN A COLOR TELEVISION PICTURE TUBE: A GLASS FACEPLATE COMPRISING A SPHERICALLY CURVED GENERALLY RECTANGULAR SCREEN PORTION AND A RIM PORTION EXTENDING OUTWARDLY THEREFROM; A MOSAIC PHOSPHOR SCREEN ON THE INTERNAL SURFACE OF SAID SCREEN PORTION OF SAID FACEPLATE; A COLOR-SELECTION DEVICE HAVING A RIGID GENERALLY RECTANGULAR FRAME HAVING A CONFIGURATION SIMILAR TO THAT OF SAID RIM PORTION AND HAVING OUTSIDE DIMENSIONS LESS THAN THE CORRESPONDING INSIDE DIMENSIONS OF SAID RIM PORTION BY A PREDETERMINED SUBSTANTIALLY UNIFORM DISTANCE; AND MEANS FOR MOUNTING SAID COLOR-SELECTION DEVICE TO SAID FACEPLATE IN PREDETERMINED SPACE RELATION TO SAID MOSAIC SCREEN, SAID MEANS COMPRISING (A) THREE CANTILEVER SPRINGS ON SAID GENERALLY RECTANGULAR FRAME, ONE AT THE CENTER OF ONE OF THE LONGER LEGS AND THE OTHER TWO AT OPPOSED LOCATIONS ON THE SHORTER LEGS SUBSTANTIALLY THREEFOURTHS OF THE DISTANCE FROM SAID ONE LONGER LEG, SAID SPRINGS BEING OUTWARDLY BIASED IN A COMMON CIRCUMFERENTIAL DIRECTION, (B) THREE TAPERED STUDS, EACH OF A LENGTH LESS THAN SAID PREDETERMINED DISTANCE, RESPECTIVELY FIXED TO SAID SPRINGS AND OUTWARDLY BIASED THEREBY, AND (C) THREE SOCKETS ON SAID RIM PORTION OF SAID ENVELOPE FOR RECEIVING SAID STUDS, THE BIAS OF SAID SPRING BEING SUFFICIENT TO MAINTAIN ALL OF SAID STUDS IN MATING ENGAGEMENT WITH THEIR RESPECTIVE SOCKETS EVEN UPON TEMPORARY LATERAL DISPLACEMENT OF SAID FRAME BY A MAXIMUM DISTANCE IN ANY DIRECTION.