Ionization smoke detector

Details Ionization smoke detector Ionization smoke detector

1981-02-11

1984-03-27

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250385, H01J 4702

Patent

active

044396830

ABSTRACT:
An ionization smoke detector having a sensing chamber and including: a screen or mesh electrode enclosing and forming the outer limits of said sensing chamber, while fully exposing said sensing chamber to the ambient atmosphere; a baffle means covering said electrode and in close proximity thereto, said baffle means having a plurality of slit-like openings spaced around the periphery thereof for permitting the transfer of ambient atmosphere to said sensing chamber; said openings of said baffle means constituting deflectors oriented to deflect any air currents directed normal to the surface of said baffle means so the air currents will enter said sensing chamber at an angle other than said normal angle.

REFERENCES:
patent: Re30323 (1980-07-01), Tomioka
patent: 3731093 (1973-05-01), Scheidweiler et al.
patent: 3903419 (1975-09-01), Lehsten
patent: 3908957 (1975-09-01), Schutt
patent: 3959788 (1976-05-01), Tipton et al.
patent: 4044263 (1977-08-01), Ried, Jr. et al.

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