Ionization-type smoke detector

Details Ionization-type smoke detector Ionization-type smoke detector

G - Physics

08

B

358/21, 358/34

G08B 17/10 (2006.01) G01N 27/64 (2006.01) G08B 17/113 (2006.01)

Patent

CA 1249671

ABSTRACT OF THE DISCLOSURE In order to provide an ionization-type smoke detector, wherein the radiation from a radioactive source mounted on the inner electrode disposed within the inner ionization chamber also reaches into the outer ionization chamber through a through-hole formed in the intermediate electrode, which is easy to assemble and which has a constitution to prevent scattering of the radioactive source even though inner and outer ionization chambers are provided with the insulation base board for supporting the inner and intermediate electrodes at a predetermined spacing is connected to the printed circuit board by a mounting rod, and the outer electrode surrounding the intermediate electrode and the insulation base board with smoke inlet openings is connected at its end periphery to the printed circuit board, the printed circuit board being connected to the base of the detector by connecting pins.

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