Apparatus for detecting explosive substances

Details Apparatus for detecting explosive substances Apparatus for detecting explosive substances

1978-10-16

1980-05-13

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

G01N 3100

Patent

active

042022002

ABSTRACT:
An apparatus for detecting the presence of explosives by screening subjects passing through a controlled axis tunnel, the apparatus comprising a substantially open ended tunnel having a cross-section so that subjects can proceed in a single file through the tunnel. The apparatus further comprises a first pair of apertures, one in each side wall of the tunnel located at a first distance from an entrance to the tunnel, and a second pair of apertures, one in each side wall of the tunnel, located at a second distance greater than the first distance from the entrance to the tunnel. Air duct means extend between the various apertures. Also included are means for inducing a circulatory flow of air through the air duct means and across the tunnel between the apertures and, further, means for detecting the vapor of an explosive substance in the air in such duct means.

REFERENCES:
patent: 3998101 (1976-12-01), Bradshaw et al.
patent: 4045997 (1977-09-01), Showalter et al.

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