Smoke detector having unipolar ionization chamber

Details Smoke detector having unipolar ionization chamber Smoke detector having unipolar ionization chamber

1978-10-25

1980-07-15

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250385, 340629, H01J 3928

Patent

active

042130476

ABSTRACT:
A smoke detector of superior smoke sensitivity characterized by a compact unipolar ionization chamber in which the ionization area or zone is situated and defined between the source of alpha particles and an electrode which confronts the source; another electrode, which attracts the unipolar charge carriers, is situated on an indirect path from the source, preferably being behind such source with respect to the pattern of radiation emitted therefrom.

REFERENCES:
patent: 2994768 (1961-08-01), Derfler
patent: 3233100 (1966-02-01), Lampart
patent: 3913082 (1975-10-01), Hamm
patent: 4053776 (1977-10-01), Hertzberg et al.
patent: 4058803 (1977-11-01), Scheidweiler

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