Dual ionization chamber

Details Dual ionization chamber Dual ionization chamber

1978-04-24

1981-01-13

Caldwell, Sr., John W.

Electric lamp and discharge devices

Plural unit

Inter-electrode connection

313 54, 250384, 340329, H01J 3928

Patent

active

042451744

ABSTRACT:
In an electronic smoke sensing and alarm device, a dual ionization chamber arrangement comprises a single source of radioactive material and first and second chambers separated by a common electrically conductive electrode. A portion of the radioactive material ionizes the air in the first chamber and another portion of the radioactive material ionizes the air in the second chamber. This arrangement provides an accurate control on the current flow through each chamber.

REFERENCES:
patent: 1569494 (1926-01-01), Hurd
patent: 2646556 (1953-07-01), Allen
patent: 2702898 (1955-02-01), Meili
patent: 2994768 (1961-08-01), Derfler
patent: 3271756 (1966-09-01), Crawford et al.
patent: 3295121 (1966-12-01), Meyer

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