Instrument for testing flammability

Details Instrument for testing flammability Instrument for testing flammability

1975-09-03

1976-10-26

Goldstein, Herbert

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 2500

Patent

active

039876616

ABSTRACT:
The instrument tests specimens by means of the critical oxygen index method and comprises a twin-walled chimney of transparent material in which the specimen is mounted. A helically wound heater coil is positioned between the chimney walls to heat the interior of the chimney and a preheater is provided to enable gases entering the chimney to be heated, the combination of heaters enabling a closely controlled temperature gradient to be maintained around the specimen. The specimen is tested by introducing into the chimney a variable mixture of nitrogen and oxygen and igniting the specimen under controlled conditions.

REFERENCES:
patent: 3545252 (1970-12-01), Springfield et al.
patent: 3578756 (1971-05-01), Evans et al.
patent: 3593563 (1971-07-01), Marmor et al.
patent: 3662586 (1972-05-01), Suga
patent: 3820379 (1974-06-01), Nelson et al.
"Fire Test Adopted as Standard" in Scientific America 5/34 pp. 268 and 272.

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