Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1976-07-12
1978-04-04
Dixon, Harold A.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250385, G01T 118
Patent
active
040829529
ABSTRACT:
Axially aligned conductive metal cylindrical members on opposite sides of a printed circuit plate define a first measuring chamber and a second reference chamber on opposite sides thereof. The bottom of one cylindrical member forms the first electrode of the reference chamber and a plate closing off the end of the measuring chamber remote from the printed circuit plate forms the first electrode of the measuring chamber. Radioactive sources are mounted to the first electrode of respective chambers and a rod projects through the printed circuit plate coaxial with the first and second cylindrical members and terminates short of the plate closing off the first chamber and the bottom of the second chamber cylindrical member, the second electrodes for the chambers mounted respectively at the ends of the rod, and wherein the second electrode of the first chamber comprises a flat apertured portion in parallel with the plate overlying the end of the first cylindrical member remote from the printed circuit plate with the first cylindrical member plate defining a flat surface.
REFERENCES:
patent: 3448261 (1969-06-01), Amiragoff
patent: 3500368 (1970-03-01), Abe
patent: 3710110 (1973-01-01), Lampart et al.
patent: 3935492 (1976-01-01), Sasaki et al.
"Ionization in Pure Gases --" by Jesse et al., Physical Review, vol. 97, No. 6, 3/13/55, pp. 1668-1669.
Depoitier Jacques
Vinchent Romain
Dixon Harold A.
Institut National des Radio-elements - Nationaal Instituut voor
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