Protective air lock

Details Protective air lock Protective air lock

1949-12-14

1976-03-30

Feinberg, Samuel

98 33R, B64D 1300

Patent

active

039466450

ABSTRACT:
A device suitable for preventing escape and subsequent circulation of toxic gases comprising an enclosure which is sealed by a surrounding air lock, automatic means for partially evacuating said enclosure and said air lock and for ventilating said enclosure and means for disconnecting said enclosure ventilating means, whereby a relatively undisturbed atmosphere is created in said enclosure.

REFERENCES:
patent: 587700 (1897-08-01), Cadwell
patent: 1002407 (1911-09-01), Kleinschmidt
patent: 2345204 (1944-03-01), Lodwig
patent: 2482770 (1949-09-01), Heineman

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