Color kinescope operating and testing arrangements

Claim 1

IN A COLOR TELEVISION RECEIVER INCLUDING A COLOR KINESCOPE HAVING A PLURALITY OF ELECTRON GUNS EACH INCLUDING CATHODE, CONTROL GRID AND SCREEN GRID ELECTRODES, THE COMBINATION COMPRISING: A LUMINANCE SIGNAL SOURCE; A PLURALITY OF RESPECTIVELY DIFFERENT COLOR DIFFERENCE SIGNAL SORUCES; MEANS PROVIDING SUBSTANTIALLY COMPLETE DIRECT CURRENT COUPLING BETWEEN EACH OF SAID COLOR DIFFERENCE SIGNAL SOURCES AND A RESPECTIVELY DIFFERENT ONE OF SAID CONTROL GRID ELECTRODES; MEANS FOR APPLYING AN INDIVIDUALLY ADJUSTABLE UNIDIRECTIONAL POTENTIAL TO EACH OF SAID SCREEN GRID ELECTRODES; MEANS FOR COUPLING SAID LUMINANCE SIGNAL SOURCE TO SAID CATHODE ELECTRODES, SAID LAST-NAMED COUPLING MEANS INCLUDING MEANS FOR INDIVIDUALLY ADJUSTING THE AMPLITUDE OF THE LUMINANCE SIGNAL DELIVERED BY SAID COUPLING MEANS TO TWO OF SAID CATHODE ELECTRODES; SWITCHING MEANS PERMITTING SELECTIVE DISRUPTION OF THE LUMINANCE SIGNAL COUPLING TO SAID CATHODE ELECTRODES;