Protective mask
Item
-
Title (Dublin Core)
-
Protective mask
-
Article Title and/or Image Caption (Dublin Core)
-
Protecting the fire-fighters
-
Caption: A new protective mask for firemen and others; in the picture at the left the edge of the elastic rim of of the mouth-piece is raised to show the curled edge, a new feature that insures airtight contact
-
extracted text (Extract Text)
-
PROTECTIVE mask for the fireman, the miner, or the soldier in the
trenches has recently been placed in the market. The mask, of rubber
and rubber-coated fabric, consists of a hood covering the entire face, and a
muzzle-shaped rubber cup that
covers the mouth and nose of
the wearer, fitting against the
nose, cheek, and chin in such a
manner as to be airtight. The
double mask is securely fastened
to the head by a harness of three
straps. The mouth-piece of the
mask is connected by a hose
entering at its lower end with
an air-pump, which may be at a
considerable distance; or with a
reservoir on the back of the wearer
which contains air under pressure
and a purifying apparatus re-
moving the carbon dioxide from
the exhaled air and making it
fit to be breathed again.
An ingenious arrangement of
flutter and check valves permits
tredh air from the: airtube to
enter the mouth and nose-
piece, but prevents the un-
breathable air surrounding
the wearer from reaching
the interior of the mask.
Airtight contact with the
skin of the wearer is
safeguarded by the elastic
rim of the mouth and nose-
piece, which is curled in-
wardly, forming a pneumatic
cushion between the skin
and the mask.
-
Language (Dublin Core)
-
eng
-
Date Issued (Dublin Core)
-
1920-01
-
pages (Bibliographic Ontology)
-
59
-
Rights (Dublin Core)
-
Public Domain (Google digitized)
-
Archived by (Dublin Core)
-
Filippo Valle
-
Alberto Bordignon (Supervisor)
Popular Science Monthly, v. 96, n. 1, 1920
