Adjustable deflection yoke mounting for color picture cathode ray tubes

Claim 1

IN COLOR TELEVISION DISPLAY APPARATUS EMPLOYING A TRI-COLOR CATHODE RAY TUBE HAVING A LUMINESCENT SCREEN COMPRISING PHOSPHORS CAPABLE OF PRODUCING RED, GREEN AND BLUE LIGHT WHEN EXCITED BY ELECTRON BEAMS AND HAVING RESPECTIVE SOURCES OF THREE ELECTRON BEAMS WHICH TRAVERSE PRE-DEFLECTION PATHS THAT ARE SPACED SYMMETRICALLY ABOUT THE LONGITUDINAL AXIS OF SAID TUBE WITH SAID BLUE LIGHTPRODUCING BEAM BEING HORIZONTALLY ABOVE AND VERTICALLY IN THE SAME PLANE WITH SAID AXIS, AND SAID RED AND GREEN LIGHT-PRODUCING BEAMS BEING HORIZONTALLY EQUALLY BELOW AND VERTICALLY EQUALLY ON OPPOSITE SIDES OF SAID AXIS, THE COMBINATION COMPRISING: MEANS INCLUDING A DEFLECTION YOKE MOUNTED EXTERNALLY OF SAID TUBE IN A REGION BETWEEN SAID ELECTRON BEAM SOURCES AND SAID SCREEN AND ENERGIZABLE TO DEFLECT SAID BEAMS TO SCAN RESPECTIVE RED, GREEN AND BLUE RASTERS AT SAID SCREEN, AND VERTICAL LINES OF SAID RED AND GREEN RASTERS BEING CONVERGED WITH ONE ANOTHER THROUGHOUT AND WITH VERTICAL LINES OF SAID BLUE RASTER IN CENTRAL PORTIONS BUT BEING SUBJECT TO MISCONVERGENCE WITH VERTICAL LINES OF SAID BLUE RASTER IN LEFT AND RIGHT SIDE PORTIONS; AND MEANS FOR CHANGING THE ELEVATION OF THE END OF SAID YOKE ADJACENT SAID ELECTRON BEAM SOURCES RELATIVE TO THE PATHS OF SAID ELECTRON BEAMS TO EFFECT CONVERGENCE OF ALL VERTICAL LINES OF SAID RED, GREEN AND BLUE RASTERS.