Apparatus for the determination of the particle size distributio

Details Apparatus for the determination of the particle size distributio Apparatus for the determination of the particle size distributio

1978-07-06

1980-05-13

Evans, F. L.

Optics: measuring and testing

For size of particles

250573, 356439, G01N 2126

Patent

active

042026296

ABSTRACT:
An apparatus is disclosed for the determination of particle size distribution of a granular material within a measuring channel. The measuring channel has radiation permeable side walls and a granular material is spread out through the measuring channel by a sifting air current in accordance with grain size. A scanning apparatus is movable external to the measuring channel and includes a frame on which is mounted a radiation transmitter and a radiation receiver lying opposite the transmitter. A measuring beam from the transmitter scans through a measuring zone of the measuring channel. The measuring frame is of closed-loop construction and surrounds the measurement channel. With such construction, the frame is not subject to vibration particularly when reciprocated in order to cause scanning movement of the measuring beam.

REFERENCES:
patent: 3597084 (1971-08-01), Pagano
patent: 3739180 (1973-06-01), Carlson
patent: 3952207 (1976-04-01), Leschonski et al.

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