Gas analyzer

Details Gas analyzer Gas analyzer

1978-01-26

1979-12-25

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250349, 250373, 128719, G01J 100, G01J 142

Patent

active

041807340

ABSTRACT:
An illustrative embodiment shows infrared radiation divided into two beams which impinge on respective detectors via respective stationary filters, so as to provide measures of two constituents of a mixture of gases used for mixed anaesthesia. The same angled mirrors which provide the measurement beams may also be reflective on their sides toward the infrared source to provide reference beams to the filters and detectors such that the detectors may alternately sense the measurement and reference beams with the aid of beam interrupters.

REFERENCES:
patent: 2806144 (1957-09-01), Berger et al.
patent: 3569696 (1971-03-01), Karlson
patent: 3677652 (1972-07-01), Little
patent: 3696247 (1972-10-01), McIntosh et al.
patent: 4067320 (1978-01-01), Olsson et al.

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