System for changing oxidants in a flame atomic absorption spectr

Details System for changing oxidants in a flame atomic absorption spectr System for changing oxidants in a flame atomic absorption spectr

1984-11-13

1986-02-18

Dority, Jr., Carroll B.

Combustion

Timer, programmer, retarder or condition responsive control

Of diverse feed or feed rate in starting, e.g., enriching...

431 90, 356315, 356417, G01J 330

Patent

active

045711720

ABSTRACT:
A flame atomic absorption spectrophotometer burner apparatus for burning a fuel such as acetylene as one essential gas in the oxidant such as nitrous oxide as another essential gas includes a system for safely changing oxidants between air and nitrous oxide during start up. The system has a pressure sensor for sensing the pressure of at least one of the essential gasses, and a valve selectively operable in response to the pressure sensor for effecting the supplying of air as the oxidant and continuing to supply air as the oxidant when the pressure of the essential gas is low and for selectively switching to nitrous oxide as the oxidant only when the pressure of the essential gas is high.

REFERENCES:
patent: 4250553 (1981-02-01), Sebens et al.
patent: 4314764 (1982-02-01), Liddell et al.

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