Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Erosion
Patent
1975-07-09
1976-07-06
Rolinec, R. V.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Erosion
235 92PC, 328 41, G01N 2700
Patent
active
039684296
ABSTRACT:
A particle analyzer of the Coulter type has at least first and second sensing zone arrangements, each having substantially the same dimensions and each generating a train of particle pulses in response to passage through the respective sensing zone of a sample containing a plurality of particles to be counted. A summing circuit connected to the output of each sensing zone sums together each of the trains of particle pulses to develop a summed train of pulses. Additional circuitry is connected to each sensing zone and the summing circuitry. This circuitry is operative to change mathematically at least the number of particle pulses in the summed train of particle pulses. The mathematically changed summed train of pulses and the train of pulses from the first and second sensing zones then are accumulated to produce an error corrected particle pulse count.
REFERENCES:
patent: 3209130 (1965-09-01), Schmidt
patent: 3649820 (1972-03-01), Totsuka et al.
patent: 3705295 (1972-12-01), Betz
patent: 3737633 (1973-06-01), Collineau
patent: 3936740 (1976-02-01), Hogg et al.
Coulter Wallace H.
Hogg Walter R.
Coulter Electronics Inc.
Rolinec R. V.
Sunderdick Vincent J.
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