Method and apparatus for generating selected gas concentrations

Details Method and apparatus for generating selected gas concentrations Method and apparatus for generating selected gas concentrations

1980-01-31

1982-02-02

Ruggiero, Joseph F.

Boots, shoes, and leggings

23232E, 2041571R, 204176, 235 92CA, 364510, 364571, 4221867, 42218630, G06F 1546, C01B 1312, G05D 2502

Patent

active

043143440

ABSTRACT:
A method and apparatus for generating an adjustable concentration of a selected gas within a carrier gas flow including a gas generator which is responsive to a drive signal. A gas analyzer detects the selected gas concentration within the carrier gas flow from the gas generator and provides a signal proportional to the measured concentration to a comparator. A gas concentration selector provides a second signal to the comparator, the signal being proportional to a desired concentration of the selected gas. In response to these signals, the comparator adjusts the drive signal to correct the gas generator output for the difference between the signals and to thereby substantially adjust the concentration of the selected gas within the carrier gas flow to the desired concentration. The method and apparatus automatically corrects for drift or other inaccuracies associated with the generation of the selected gas.

REFERENCES:
patent: 3752748 (1973-08-01), McMillan, Jr.
patent: 3812330 (1974-05-01), Bowman et al.
patent: 3899684 (1975-08-01), Tenney
patent: 4138724 (1979-02-01), Kawauchi
patent: 4166784 (1979-09-01), Chapin et al.
patent: 4167665 (1979-09-01), Johns et al.

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