Method of and apparatus for determining the nature of transporte

Details Method of and apparatus for determining the nature of transporte Method of and apparatus for determining the nature of transporte

1980-01-03

1982-11-16

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250255, 378 58, G01N 2300, G21K 100

Patent

active

043596398

ABSTRACT:
A coal/stone mixture transported on a conveyor is investigated by subjecting it to two radiation beams of differing energies. In a preferred embodiment, the higher energy radiation is collimated into a pencil beam and the lower energy radiation into a fan beam. Detector shielding prevents substantial interference of close-to-surface reactions within the detector deriving from the higher energy beam with detection of the lower energy beam.

REFERENCES:
patent: 3246150 (1966-04-01), Stoddart et al.
patent: 4078178 (1978-03-01), Lowes
patent: 4090074 (1978-05-01), Watt et al.
patent: 4200792 (1980-04-01), Fanger et al.

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