Plural channel switching system with impedance of on gate and off gates forming a bandpass filter

Claim 1

IN A RADIO RELAY STATION HAVING AT LEAST AN INPUT CHANNEL AND A PLURALITY OF OUTPUT CHANNELS TO CARRY SIGNAL INFORMATION AND A SWITCHING MEANS FOR ALTERNATIVELY CONNECTING THE INPUT CHANNEL WITHONE OF THE OUTPUT CHANNELS AND CONNECTING AT LEAST ONE OF SAID OUTPUT CHANNELS TO A RESISTOR, SAID SWITCHING MEANS COMPRISING A FIRST PAIR OF TERMINALS CONNECTED TO SAID INPUT CHANNEL, A PLURALITY OF SECOND PAIRS OF TERMINALS, SERIES ARMS AND SHUNT ARMS HAVING PREDETERMINED IMPEDANCE CHARACTERISTICS SO AS TO CONSTITUTE A BANDPASS FILTER AT THE SIGNAL FREQUENCY BETWEEN SAID FIRST PAIR OF TERMINALS AND EACH OF SAID SECOND PAIRS OF TERMINALS, A PLURALITY OF GATE MEANS EQUAL IN NUMBER TO THE PLURALITY OF OUTPUT CHANNELS OPERABLE BETWEEN A HIGH AND A LOW IMPEDANCE STATE AND EACH HAVING A PAIR OF INPUT TERMINALS AND A PAIR OF OUTPUT TERMINALS AND PRESENTING TO EITHER OF SAID PAIR OF TERMINALS A CIRCUIT EQUIVALENT TO INDUCTANCE AND CAPACITANCE IN PARALLEL WHEN IN THE HIGH IMPEDANCE STATE AND A SUBSTANTIALLY PURE RESISTANCE WHEN IN THE LOW IMPEDANCE STATE, AND MEANS CONNECTING THE INPUT TERMINALS OF EACH GATE INDIVIDUALLY TO A RESPECTIVE SECOND PAIR OF TERMINALS AND CONNECTING THE OUTPUT TERMINALS OF EACH GATE INDIVIDUALLY TO A DIFFERENT ONE OF SAID OUTPUT CHANNELS, AND BIASING MEANS TO BIAS ONE OF SAID GATES INTO A LOW IMPEDANCE STATE AND THE OTHER GATES INTO THE HIGH IMPEDANCE STATE AT ANY ONE TIME, WHEREBY IN THE HIGH IMPEDANCE STATE OF ANY GATE THE IMPEDANCE ACROSS SAID PAIR OF INPUT TERMINALS THEREOF APPEARS AS A SHUNT ELEMENT OF THE BANDPASS FILTER.