Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Particle counting
Patent
1984-02-01
1986-12-23
Levy, Stewart J.
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Particle counting
7386411, 7386434, 141 67, G01N 2700
Patent
active
046314830
ABSTRACT:
A particle analyzing apparatus and method of moving and counting particles in suspension through such an apparatus. The particle analyzing apparatus comprises a particle counting device wherein particles in suspension are caused to be moved through an aperture whose effective impedance is changed with the passage of each particle therethrough and a fluid connection means for drawing a quantity of the suspension through the aperture, including a source of vacuum. The source of vacuum comprises a bellows having an end, and a constant force means connected to the end of the bellows means.
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Robertshaw Controls Company, Knoxville, Tennessee, Bellows, Catalog R, Oct. 1982, p. 5.
Igor J. Karassik et al., McGraw-Hill Book Company, Pump Handbook, 1976, section 10.20, pp. 10-231 to 10-233.
James Bobby D.
Proni Oscar
Coulter Electronics Inc.
Fissell, Jr. Carl
Hibnick Gerald R.
Levy Stewart J.
O'Shea Kevin D.
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