Measuring and testing – Particle size
Patent
1986-11-20
1988-09-13
Levy, Stewart J.
Measuring and testing
Particle size
G01N 1504
Patent
active
047700513
ABSTRACT:
An automatic system for analysis of sizes of a ground material includes a sampler for sampling and delivering the ground material in the form of a slurry. A sedimentation of cylinder is provided as is a device for reception of the slurry, its stirring and dosed supply into the sedimentation cylinder. A differential circuit is provided for measuring the mass of the ground material, which did not settle in the sedimentation cylinder as any instant of time during the analysis of the material size including a measuring channel and a correcting channel based on the same LC self-excited oscillator operating in a time sharing mode. An automatic error correction circuit and a data processing and display unit are provided for presenting information on the percentage of solid particles in the sizes being analyzed.
REFERENCES:
patent: 4175426 (1979-11-01), Rosenblum
patent: 4282745 (1981-08-01), Burr
patent: 4287757 (1981-09-01), Bucsky et al.
patent: 4318296 (1982-03-01), Parker et al.
patent: 4419879 (1983-12-01), Bush et al.
patent: 4588091 (1986-05-01), Wade
Bate et al., "Particle Size Distribution of Particles from 10 to 2000 Microns by Sedimentation Analysis", Analytical Chemistry, vol. 40, No. 2, Feb. 1968.
Chumak Sergei N.
Korisch Semen I.
Yasenev Petr S.
Levy Stewart J.
Raevis Robert R.
Uralsky filial Vsesojuznogo nauchno-issledovatelskogo i
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