Accession Number : ADD009961

Title :   Argon Purity Tester.

Descriptive Note : Patent,


Personal Author(s) : MacFarland,James M ; Kappe,Bernard W

Report Date : 16 Nov 1982

Pagination or Media Count : 5

Abstract : An inert gas purity tester having a housing made of transparent material and in which is located a thin wire tungsten filament. The filament is electrically connected to a variable electrical power source from, for example, an inert gas welding apparatus in order to provide a regulated flow of current to pass through the filament. The power source is then regulated until the filament glows white. The housing also has formed therein an inlet and outlet for allowing the flow of inert gas to pass therethrough. During the passage of gas through the housing, a trace of smoke detected at the white glowing filament indicates the presence of an impurity of oxygen within the inert gas such as argon. Viewing is continued until no more smoke is detected and it is therefore established that the impurity is no longer present in the gas. Thereafter, inert gas welding can be successfully undertaken. (Author)

Descriptors :   *Patents, *Gas detectors, *Inert gas welding, Gas analysis, Purity, Rare gases, Oxygen, Tungsten, Filaments, Impurities, Smoke, Inventions

Subject Categories : Fabrication Metallurgy
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE