Receiver if trap using a bifilar winding

Claim 1

IN A RADIO SIGNAL RECEIVER, SIGNAL HANDLING FILTER CIRCUIT MEANS INCLUDING: MEANS ESTABLISHING A SIGNAL HANDLING CHANNEL HAVING A SIGNAL CONDUCTOR AND A REFERENCE CONDUCTOR, SAID CHANNEL INCLUDING A GENERALLY CYLINDRICAL CIRCUIT ELEMENT HAVING TWO TERMINALS AND SHUNT CONNECTED ACROSS SAID CHANNEL, ONE OF SAID TERMINALS BEING CONNECTED WITH EACH OF SAID SIGNAL CHANNEL CONDUCTORS; AND A FILTER COMPRISING A PAIR OF BIFILAR WINDINGS MOUNTED ON SAID CIRCUIT ELEMENT, EACH WINDING HVING CORRESPONDING FIRST AND SECONE ENDS, ONE OF SAID WINDINGS HAVING ITS FIRST END CONNECTED WITH ONE OF THE TERMINALS OF SAID CIRCUIT ELEMENT AND ITS SECOND END UNCONNECTED, THE OTHER WINDING HAVING ITS FIRST END UNCONNECTED AND ITS SECOND END CONNECTED WITH THE OTHER TERMINAL OF SAID CIRCUIT ELEMENT, THE DISTRIBUTED CAPACITY BETWEEN SAID WINDINGS RESONATING WITH THE EFFECTIVE INDUCTANCE THEREOF FORMING A SERIES RESONANT NETWORK AT THE FREQUENCY TO BE FILTERED.