The United States of America as represented by the United States Energy Research and Development Administration - Washington DC
International Classification:
B64D 1300
US Classification:
98 15
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.
Herbert Evans may refer to: Herbert McLean Evans (18821971), American anatomist and embryologist; Herbert Evans (politician) (18681931), British Labour ...