Electricity: measuring and testing – Using ionization effects – For analysis of gas – vapor – or particles of matter
Patent
1979-03-30
1981-05-05
Smith, Alfred E.
Electricity: measuring and testing
Using ionization effects
For analysis of gas, vapor, or particles of matter
3132317, 3151119, G01N 2762
Patent
active
042661960
ABSTRACT:
A gas detecting means of this invention is provided with a discharge section which radiates light by electric discharge, a detecting section which collects an ion current of a sample gas ionized by the light, and an optical path which connects the discharge and the detecting sections. The discharge is formed by a pointed cathode and an anode having a penetration hole. The tip of the pointed cathode is directed to the optical path. The diameter of the penetration hole of the anode is smaller than that of the optical path. The anode is disposed in such a manner that any peripheral part of an inlet of the penetration hole is at an equal distance from the tip of the cathode. Both the discharge section and the detecting section are shielded electrically by an outer shell of metal.
REFERENCES:
patent: 1564694 (1925-12-01), Lerchen
patent: 1958953 (1934-05-01), Parker
patent: 3379968 (1968-04-01), Yamane
patent: 3418514 (1968-12-01), Sternberg
patent: 3454828 (1979-07-01), Yamane
patent: 4028617 (1977-06-01), Kamo et al.
Kawazoe Kazuyoshi
Suzuki Mon
Takata Yoshinori
Uehara Shizuo
Hitachi , Ltd.
O'Hare Thomas P.
Smith Alfred E.
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