Positive ion smoke detector using a tungsten wire preheated in h

Details Positive ion smoke detector using a tungsten wire preheated in h Positive ion smoke detector using a tungsten wire preheated in h

1976-12-23

1979-11-27

Corcoran, Robert J.

Electricity: measuring and testing

Using ionization effects

For analysis of gas, vapor, or particles of matter

340629, 313230, G01N 2762

Patent

active

041763114

ABSTRACT:
Smoke is detected by a surface ionization effect on a heated wire filament disposed opposite a negative ion collector electrode. Current flow between the wire and the electrode increases in the presence of smoke. The increase is probably attributable to surface ionization of smoke particles on the heated wire.

REFERENCES:
patent: 1767218 (1930-06-01), Kunsman
patent: 2157478 (1939-05-01), Burkhardt
patent: 2550498 (1951-04-01), Rice
patent: 3775616 (1973-11-01), Tagashira et al.
patent: 3823372 (1974-10-01), Hanson et al.
patent: 3932851 (1976-01-01), Rayl et al.
patent: 4047101 (1977-09-01), Bauerle et al.
White, W. C., Positive-Ion Emission a Neglected Phenomenon, Proc. of IRE, Aug. 1950, p. 852.

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