Smoke detector ionization chamber

Details Smoke detector ionization chamber Smoke detector ionization chamber

1977-11-23

1980-02-19

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

313 54, 313149, 340629, G01T 118

Patent

active

041896440

ABSTRACT:
An ionization chamber of the type used in an ionization smoke detector is made adjustable. The chamber has two electrodes and one radioactive source for ionizing the electrode gap. One of the electrodes is laterally displaceable relative to the other. As a result of displacement of this electrode, areas of the electrode with differing geometrical configurations can be brought into the ionization zone of the radioactive source.
Several different embodiments of the electrode with different geometrical configurations are described.

REFERENCES:
patent: 2548385 (1951-04-01), Marshall
patent: 4007374 (1977-02-01), Solomon
patent: 4021671 (1977-05-01), Solomon

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