Device for measurement of content of loose mixtures components

Details Device for measurement of content of loose mixtures components Device for measurement of content of loose mixtures components

1984-03-21

1986-05-20

Howell, Janice A.

Radiant energy

Inspection of solids or liquids by charged particles

Including a radioactive source

2503581, 2505051, G01N 2300

Patent

active

045903735

ABSTRACT:
A device for the measurement of the amounts of components of loose mixtures comprises a beta radiation source, a backscattering detector, a casing integral with a tribranched hollow chamber, divided at its branching point by a beta radiation-permeable membrane, to form a top branch to contain the sample mixture, and bottom branches leading to the detector inlet and source, respectively, and a lid to close the top branch. The lid is linked to the source to place it in an "on" position on closure. The detector feeds via a comparator, an anticoincidence circuit, whose second input is connected to a tuned generator and whose output feeds a reversible counter via a double frequency divider. Instead a frequency divider may follow the comparator. This may be adjustable with a second frequency divider preceding the second input of the anticoincidence circuit.

REFERENCES:
patent: 2884539 (1959-04-01), Swift, Jr.
patent: 3588507 (1971-06-01), Weinstock et al.
patent: 4224517 (1980-09-01), Lubecki et al.
Lovely et al., "The Rapid Assessment of Coal Mine Roadway Dusts Using a Portable Radioactive Device" Australian Symposium, May 1981.
Sacks et al., "Modification of Bureau of Mines BERC Rock Dust Meter", Report of Invest. 8155.

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