Particle analyzing apparatus and fluid circulating system theref

Details Particle analyzing apparatus and fluid circulating system theref Particle analyzing apparatus and fluid circulating system theref

1977-09-02

1979-02-20

Strecker, Gerard R.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Erosion

G01N 2707

Patent

active

041409663

ABSTRACT:
A particle analyzing apparatus having an aperture retaining member positioned in a housing for obtaining signals from particles which pass through a scanning aperture. The aperture retaining member includes an elongate director tube into which the particles to be sensed are introduced for movement to and passage directly through the aperture. An aperture holder with the aperture provided therein is positioned at the terminus of the director tube but spaced a small distance therefrom to permit entry of ensheathing clean liquid within the space and passage of the ensheathing liquid through the aperture simultaneously with passage of the particles. The downstream side of the aperture is in liquid communication through a fluid circulating system with the upstream side thereof; a pump is interposed in the path of liquid communication between the upstream and downstream sides of the aperture to enable continuous recirculation of the liquid throughout the system.

REFERENCES:
patent: 3688191 (1972-08-01), Claps
patent: 3793587 (1974-02-01), Thom et al.
patent: 3810010 (1974-05-01), Thom
patent: 3831087 (1974-08-01), Schulz et al.
patent: 3979669 (1976-09-01), Godin
patent: 4070617 (1978-01-01), Kachel et al.

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