Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A dead time compensation circuit for a radiation detector using a Geiger-Muller tube comprising a first counter for producing a count proportional to pulses produced by the Geiger-Muller tube during a predetermined time interval T, said first counter having an output for feeding a digital display counter, second counter means for storing a count proportional to pulses produced by the Geiger-Muller tube during a predetermined time interval T/K where K is a constant, means for decrementing to zero the count in said second counter means following expiration of said time interval T/K, and means enabled while the count in said second counter is being decremented to produce an extra pulse following receipt of a pulse from the Geiger-Muller tube which extra pulse is added to the count in said first counter.
Claim 2
Dependent Claim
131 words
A dead time compensation circuit for a radiation detector using a Geiger-Muller tube comprising a first counter for producing a count proportional to pulses produced by the Geiger-Muller tube during a predetermined time interval T, said first counter having an output for feeding a digital display counter, second counter means for storing a count proportional to pulses produced by the Geiger-Muller tube during a predetermined time interval T/K where K is a constant, means for decrementing to zero the count in said second counter means following expiration of said time interval T/K, and means enabled while the count in said second counter is being decremented to produce an extra pulse following receipt of a pulse from the Geiger-Muller tube which extra pulse is added to the count in said first counter.
Claim 3
Dependent Claim
34 words
A circuit as claimed in claim 1 wherein said first counter is a dividing counter which produces an output which is a predetermined fraction of the number of pulses received from the Geiger-Muller tube.
Claim 4
Dependent Claim
54 words
A circuit as claimed in claim 2 wherein said second counter means includes a second dividing counter having an input connected to the output of said first counter and an output connected to feed a serial input of a third counter, said third counter having parallel outputs feeding parallel inputs of a fourth counter.
Claim 5
Dependent Claim
40 words
A circuit as claimed in claim 3 including a first flip-flop which is set by pulses from circuitry in the radiation detector at intervals T/K and reset at intervals T, said first flip-flop disabling, when set, said second dividing counter.
Claim 6
Dependent Claim
45 words
A circuit as claimed in claim 4 wherein a second flip-flop is clocked by pulses from the Geiger-Muller tube to provide a preset enable signal to said fourth counter, said second flip-flop being set by said fourth counter when its count is decremented to zero.
Claim 7
Dependent Claim
65 words
A circuit as claimed in claim 5 wherein said preset enable signal also enables one input of a NOR gate, said NOR gate having a second input connected to receive pulses from the Geiger-Muller tube and an output connected to reset a third flip-flop, said third flip-flop, when reset, enabling a fourth flip-flop to be clocked to provide an extra pulse to said first counter.