Low level gas proportional counter construction

Claim 1

AN ANTI-COINCIDENCE COUNTER COMPRISING, CONCENTRIC FIRST AND SECOND ELECTRICALLY CONDUCTIVE TUBES OF DIFFERENT DIAMETERS DEFINING AN ANNULAR COUNTING CHAMBER BETWEEN THEM, THE RADIAL DIMENSION OF SAID CHAMBER BETWEEN SAID FIRST AND SECOND TUBES BEING DESIGNATED BY 2R, HIGH VOLTAGE INSULATOR MEANS MOUNTING A PLURALITY OF FINE WIRE ANODES IN SAID CHAMBER PARALLEL TO THE AXES OF SAID TUBES, THE RADIAL SPACING OF EACH OF SAID WIRES FROM THE SURFACE OF EACH TUBE BEING SUBSTANTIALLY EQUAL TO R AND THE CIRCUMFERENTIAL DISTANCE BETWEEN EACH PAIR OF WIRES BEING SUBSTANTIALLY EQUAL TO 2R, AND THE CIRCUMFERENTIAL DISTANCE BETWEEN EACH MEMBER OF SAID PAIR OF WIRES BEING SUBSTANTIALLY EQUAL TO 2R, SAID HIGH VOLTAGE INSULATOR MEANS COMPRISING, A NONCONDUCTIVE RING AT EACH ENF OF SAID CHAMBER AND MOUNTING MEANS SECURING SAID WIRES TO SAID RING, SAID MOUNTING MEANS INCLUDING ELASTIC MEANS FOR HOLDING SAID WIRES IN TENSION IN SAID CHAMBER, A SHORTING WIRE CONNECTING THE ENDS OF SAID WIRES, A CONDUCTIVE ANNULAR END CAP OUTWEARDLY OF EACH RING AND ELECTRICALLY CONNECTING SAID TUBES, MEANS HOLDING EACH END CAP BETWEEN SAID TUBES, AND EXTERNAL MEANS FOR CONNECTING A SOURCE OF POTENTIAL ACROSS SAID TUBES AND SAID WIRES.