Stabilized scintillation detector

Claim 1

IN A SCINTILLATION DETECTOR FOR DETECTING INCOMING RADIATION COMPRISING QUANTA, A SUBSTANCE ADAPTED TO INTERACT WITH SAID QUANTA AND TO PRODUCE CHARACTERISTIC LIGHT PULSES AS A RESULT OF SUCH INTERACTION, SAID CHARACTERISTIC LIGHT PULSES HAVING INTENSITIES RESPECTIVELY REPRESENTING THE ENERGIES OF SAID QUANTA, A STANDARD ELECTRIC LIGHT SOURCE, MEANS FOR FEEDING TO SAID SOURCE ELECTRIC ENERGY IN CURRENT PULSES OF PREDETERMINED MAGNITUDE AND CONTROLLED REPETITION RATE, PRODUCING THEREBY STANDARD LIGHT PULSES OF UNIFORM BRIGHTNES EXCEEDING THAT OF SAID CHARACTERISTIC LIGHT PULSES, A PHOTOELECTRIC SYSTEM RESPONSIVE TO SAID CHARACTERISTIC LIGHT PULSES AND TO SAID STANDARD LIGHT PULSES FOR PRODUCING CURRENT IMPULSES HAVING MAGNITUDES REPRESENTING THE RESPECTIVE MAGNITUDES OF SAID CHARACTERISTIC LIGHT PULSES AND PRODUCING OTHER CURRENT IMPULSES REPRESENTING THE MAGNITUDES OF SAID STANDARD LIGHT PULSES, A CONTROLLABLE SUPPLY OF VOLTAGE FOR ENERGIZING AT LEAST A PART OF SAID PHOTOELECTRIC SYSTEM, AND MEANS RESPONSIVE TO CHANGES IN THE MAGNITUDE OF SAID OTHER CURRENT IMPULSES FOR CONTROLLING SAID VOLTAGE SUPPLY TO MAINTAIN SAID SYSTEM IN CALIBRATION DESPITE CHANGES IN SENSITIVITY OF SAID PHOTOELECTRIC SYSTEM.