US 4,046,014 A · Sealable activated charcoal gas sampler

Abstract

A rigid reuseable metallic tube is provided with sealing screws at either end, operable to deform malleable lead washers against a labyrinth pattern at the extreme tube ends. In one embodiment, a wire form is disposed within the tube with an annular portion conforming to the tube interior, and an elongated wire depending therefrom, for holding the charcoal in place. In another embodiment, wire screen discs hold the charcoal in place, and utilize elongated pegs to remove the screen and withdraw the charcoal. Plugs of glass wool may also be used to enclose the activated charcoal against the annulus and/or the screens. An orifice in the tube may be provided to restrict air flow through the charcoal. Alternatively, a needle valve and flow meter may be used to regulate flow. An alternative embodiment is reuseable, and utilizes sintered metallic plugs press fit into and against the metallic tube, thereby giving rise to advantageous methods for removal of the sampled gases.

Claims11

Dependent claims

A cartridge for sampling ambient gases comprising:

a rigid metallic cylindrical thermally conductive tube, inert to the ambient gases and provided with a threaded portion at each end;
a predetermined charge of gas absorber material within said tube;
first and second rigid, integral, thermally conductive plugs having a rigid substantially permanent force fit in thermally conductive relation with the interior of said tube, said plugs having openings therethrough to permit flow of gases through said plugs and said tube, said plugs permanently enclosing and compressing said absorber material in said tube;
and
sealing screw means for each end of said tube.

2 more elements

Dependencies are inferred from the claim text.

Sealable activated charcoal gas sampler

Life of this patent

Sealable activated charcoal gas sampler

Life of this patent

Abstract

Claims11