High voltage regulation by voltage control of video amplifier

Claim 1

A TELEVISION RECEIVER COMPRISING: A POWER SUPPLY, INCLUDING A VOLTAGE REGULATOR, FOR DEVELOPING UNIDIRECTIONAL RECEIVE-OPERATING POTENTIALS MAINTAINED AT SUBSTANTIALLY CONSTANT VALUES IN THE PRESENCE OF NORMAL VARIATIONS IN LOAD ON THE POWER SUPPLY BUT SUBJECT TO EXPERIENCE A DECREASE IN VALUE IN THE PRESENCE OF ABNORMALLY LARGE VARIATIONS IN LOAD AND FOR DEVELOPING A BIAS POTENTIAL LIKEWISE HAVING A SUBSTANTIALLY CONSTANT VALUE IN THE PRESENCE OF NORMAL VARIATIONS IN LOAD ON THE POWER SUPPLY BUT SUBJECT TO CHANGE IN VALUE UPON THE OCCURRENCE OF AND IN AN AMOUNT DETERMINED BY THE MAGNITUDE OF SAID ABNORMALLY LARGE VARIATIONS IN LOAD; A VIDEO-FREQUENCY CHANNEL INCLUDING AN AMPLIFIER DEVICE AND AN IMAGE-REPRODUCING DEVICE AT LEAST ONE OF WHICH DEVICES HAS A CONTROL ELECTRODE EFFECTIVE TO CONTROL THE BRIGHTNESS CHARACTERISTIC OF SAID REPRODUCING DEVICE AND FURTHER TO VARY THE LOAD REPRESENTED BY SAID CHANNEL AS A FUNCTION OF APPLIED BIAS POTENTIAL; MEANS FOR CONNECTING SAID CHANNEL AS A LOAD ON SAID POWER SUPPLY; AND A BIAS CIRCUIT, EFFECTIVE DURING BOTH NORMAL AND ABNORMAL VARIATIONS IN LOAD ON SAID POWER SUPPLY, CONNECTING SAID CONTROL ELECTRODE TO SAID POWER SUPPLY FOR IMPRESSING SAID BIAS POTENTIAL ON SAID CONTROL ELECTRODE WITH A POLARITY TO CONTROL SAID BRIGHTNESS CHARACTERISTIC IN A SENSE TO OPPOSE AND THEREBY COMPENSATE SAID ABNORMALLY LARGE VARIATIONS.