Proportional counter for detecting surface contaminations

Details Proportional counter for detecting surface contaminations Proportional counter for detecting surface contaminations

Filed on

1984-10-05

Date issued

1987-11-17

Examiner

Howell, Janice A.

Patent Class

Radiant energy

SubClass

Invisible radiant energy responsive electric signalling

SubSubClass

Including a radiant energy responsive gas discharge device

Other Related Categories

2505151, G01T 118

Type

Patent

Status

active

Patent number

047076062

Description

ABSTRACT:
Proportional counters for the detection and measurement of radioactive surface contaminations are provided with at least two flat window faces enclosing an angle and being formed by a thin foil spread or stretched by a framework including thin rods arranged along the inner edges of contacting window faces, to which rods the foil may be adhered. A perforated lattice or grid cage serves in particular to protect the thin window against any contact, the cage provides for a spacing of about double rod thickness between the framework and the controlled surface. Preferred is a polygonal and in particular hexagonal lattice whose grid wires or strips do not lie in the main scanning direction. Particularly convenient for checking pipelines are, for example, cylindrical measuring probes comprising window foils extending over and perhaps adhered to a circularly arranged frame of thin rods.

REFERENCES:
patent: 2505919 (1950-05-01), Simpson, Jr.
patent: 2509700 (1950-05-01), Simpson, Jr.
patent: 2965759 (1960-12-01), Eberline
patent: 2968731 (1961-01-01), Davis et al.
patent: 3110835 (1963-11-01), Richter et al.
patent: 3346754 (1967-10-01), Natanagara et al.
"Air Proportional Counters", J. A. Simpson, Jr., The Review of Scientific struments, vol. 19, No. 11, Nov. 1948.

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