Electrode assembly for combustion products detector

Details Electrode assembly for combustion products detector Electrode assembly for combustion products detector

1979-05-07

1981-03-24

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

H01J 3928

Patent

active

042582610

ABSTRACT:
This electrode assembly includes two relatively large-diameter, parallel conductive discs spaced apart by an annular insulator which has peripheral flanges respectively encompassing the perimeters of the discs. The assembly is adapted to be disposed in an ionization chamber formed by a printed circuit board and a conductive cup mounted thereon. One of the discs has conductive mounting legs adapted to be snap-fitted into complementary openings in the circuit board for spacing the disc from the board a distance sufficient to permit the mounting of associated electronic components therebetween. Both discs have pronged attachment apertures adapted for one-way press-fitting engagement with corresponding attachment posts on the insulating body, one disc having a central aperture for mounting an associated radioactive source thereon. The other disc cooperates with the one disc to define a reference zone therebetween and cooperates with the metal cup to define a sampling zone of the ionization chamber.

REFERENCES:
patent: 3767917 (1973-10-01), Lampart et al.
patent: 4012729 (1977-03-01), Weaver et al.
patent: 4044263 (1977-08-01), Ried et al.
patent: 4081684 (1978-03-01), Wieder
patent: 4150373 (1979-04-01), Ried

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