Electronic switching of tuned circuits

Claim 1

A TUNER FOR A TELEVISION RECEIVER FOR TUNING TO ONE OF A NUMBER OF DISCRETE FIXED TELEVISION CHANNEL FREQUENCIES, SAID TUNER HAVING A PLURALITY OF TUNED CIRCUITS, SAID CIRCUITS COMPRISING A TANK CAPACITOR, A PLURALITY OF SERIESCONNECTED INDUCTORS FOR COOPERATION WITH SAID CAPACITOR, AND A PLURALITY OF DIODES ACTUATING AS SELECTIVELY USABLE SWITCHES CONNECTED TO POINTS BETWEEN SAID INDUCTORS FOR BYPASSING A DESIRED NUMBER OF SAID INDUCTORS, A SOURCE OF FORWARD BIAS, ONE SIDE OF EACH DIODE BEING CONNECTED TO ONE SIDE OF THE FORWARD BIAS SOURCE THROUGH THE SERIESCONNECTED INDUCTORS, SAID DIODES BEING NORMALLY CONNECTED TO ONE SIDE OF A REVERSE BIAS SOURCE THROUGH RESISTORS WHICH HAVE A RESISTANCE VALUE HIGH ENOUGH TO BLOCK THE RADIO FREQUENCY, THE OTHER SIDE OF BOTH OF SAID BIAS SOURCES BEING GROUNDED, THE SIDE OF EACH DIODE REMOTE FROM THE INDUCTORS BEING CONNECTED VIA A LARGE BY-PASS CAPACITOR TO GROUND FOR RADIO FREQUENCY FLOW TO GROUND WHEN THE DIODE IS MADE CONDUCTIVE, AND THE SAID REMOTE SIDE OF EACH DIODE ALSO BEING CONNECTED TO GROUND BY MEANS OF A NORMALLY OPEN BIAS SWITCH WHICH WHEN CLOSED APPLIES THE FORWARD BIAS TO AND EFFECTIVELY OVERCOMES THE REVERSE BIAS ON THE CORRESPONDING ONE OF SAID DIODES AND THEREBY MAKES THE SAID DIODE CONDUCTIVE FOR RADIO FREQUENCY WHICH THEN FLOWS THROUGH THE CORRESPONDING ONE OF THE SAID BYPASS CAPACITORS, COOPERATIVE RESONANCE BEING THEREBY ESTABLISHED BETWEEN THE TANK CAPACITOR AND ONE OR MORE OF THE SERIES-CONNECTED INDUCTORS, THE RESONANT RADIO-FREQUENCY CURRENT FLOWING FROM GROUND, THROUGH THE TANK CAPACITOR, THROUGH THE SAID ONE OR MORE INDUCTORS, THROUGH THE CORRESPONDING BY-PASS CAPACTOR, AND BACK TO GROUND.