Apparatus for the indication and measurement of nuclear radiation

Claim 1

APPARATUS FOR INDICATING AND MEASURING NUCLEAR RADIATION, COMPRISING A PULSE DELIVERING COUNTER TUBE DETECTOR, AN IMPULSE GENERATOR COMPRISING AN OSCILLATOR CONNECTED TO POWER SAID DETECTOR, DIAL INDICATOR MEANS FOR DIFFERENT INDIVIDUAL PULSE RANGES, AND SWITCH DEVICES CONNECTED TO THE OSCILLATOR AND DETECTOR AND HAVING A SWITCH POSITION WHEREIN, IN THE RANGES WITH LOW PULSE COUNTS, SUCH LOW PULSE COUNTS ARE EXTENDED IN LENGTH AND THE IMPULSE GENERATOR OPERATES AT LOW FREQUENCY, AND HAVING A DIFFERENT SWITCH POSITION WHEREIN, IN THE RANGES WITH HIGHER PULSE COUNTS THE INDIVIDUAL PULSE WIDTHS ARE REDUCED WITHOUT DECREASING PULSE AMPLITUDE AND THE FREQUENCY OF THE IMPULSE GENERATOR IS INCREASED, WHEREBY IN THE RANGES IN WHICH THE FINAL PULSE COUNT IS DELIVERED, LIMITED BY THE CHARACTERISTICS OF THE DETECTOR WHICH CONDUCTS IN REGULAR SEQUENCE FOR SHORT PERIODS ONLY, SUCH FINAL PULSES PROVIDE THE RESPECTIVE INDICATOR READINGS.