Power supply protection arrangement

Claim 1

IN A COLOR TELEVISION RECEIVER INCLUDING A COLOR IMAGE REPRODUCING DEVICE HAVING AN ELECTRODE REQUIRING A HIGH UNIDIRECTIONAL ENERGIZING POTENTIAL, MEANS FOR DEVELOPING PERIODICALLY RECURRING VOLTAGE PULSES AND INCLUDING AN ELECTRON DISCHARGE DEVICE HAVING AN INPUT ELECTRODE, HIGH VOLTAGE RECTIFYING MEANS RESPONSIVE TO SAID PERIODICALLY RECURRING PULSES FOR DEVELOPING POTENTIAL SUPPLYING SAID HIGH UNIDIRECTIONAL ENERGIZING POTENTIAL TO SAID REPRODUCING DEVICE ELECTRODE, AND HIGH VOLTAGE REGULATOR CIRCUITRY FOR MAINTAINING, WHEN OPERATIVE, SUBSTANTIALLY CONSTANT LOADING ON SAID HIGH VOLTAGE RECTIFYING MEANS; THE COMBINATION COMPRISING; MEANS RESPONSIVE TO SAID PERIODICALLY RECURRING PULSES FOR DEVELOPING A SUBSTANTIALLY INVARIANT BIAS VOLTAGE WHEN SAID REGULATOR CIRCUITRY IS OPERATIVE, AND FOR DEVELOPING A VARIABLE BIAS VOLTAGE, THE MAGNITUDE OF WHICH VARIES DIRECTLY WITH VARIATIONS IN SAID HIGH UNIDIRECTIONAL ENERGIZING POTENTIAL, WHENEVER SAID REGULATOR CIRCUITRY IS UNDESIRABLY DISABLED; AND MEANS FOR COUPLING SAID DISCHARGE DEVICE INPUT ELECTRODE TO SAID BIAS VOLTAGE DEVELOPING MEANS SO THAT THE BIAS UPON SAID DISCHARGE DEVICE INPUT ELECTRODE IS MAINTAINED SUBSTANTIALLY INVARIANT AT SOME DESIRED OPERATING POINT WHEN SAID REGULATOR CIRCUITRY IS IN OPERATIVE CONDITION, AND VARIES, WHEN SAID REGULATOR CIRCUITRY IS UNDESIRABLY DISABLED, IN A DIRECTION TO REDUCE THE MAGNITUDE OF SAID PERIODICALLY RECURRING PULSES SHOULD THE HIGH UNIDIRECTTIONAL POTENTIAL INCREASE UNDER SUCH REGULATOR CIRCUITRY DISABILITY CONDITIONS.