Assembly and method of obtaining a controlled gas mixture

Details Assembly and method of obtaining a controlled gas mixture Assembly and method of obtaining a controlled gas mixture

1974-09-13

1976-02-24

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Self-proportioning flow systems

48195, G05D 1113

Patent

active

039398587

ABSTRACT:
Apparatus and method for obtaining a controlled gas mixture of predetermined proportionality using a temperature dependent permeation tube or like source for the addition of a small amount of a constituent gas in a higher flow rate carrier gas. A thermistor having a negative coefficient of resistance is associated with the permeation source and electrically connected to a flow controller for the carrier gas to automatically regulate the flow rate of the carrier gas in accordance with temperature variation of the permeation source.

REFERENCES:
patent: 1767588 (1930-06-01), Hutton
patent: 2349521 (1944-05-01), Schmidt
patent: 2352584 (1944-06-01), Ziebolz et al.
patent: 3205465 (1965-09-01), Lambertson et al.
patent: 3412935 (1968-11-01), O'Keeffe
patent: 3634053 (1972-01-01), Klass et al.

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