A Hood or Head Covering to Enable the Wearer to Breathe in Rooms or Places Filled with Smoke or Noxious Gases.
Year: 1894

page_text: Date of Application, 9th Aug., 1894-Accepted, 22nd Sept., 1894
COMPLETE SPECIFICATION.
A Hood or Head Covering to Enable the Wearer to Breathe in
Rooms or Places Filled with Smoke or Noxious Gases.
I, FRIEDRICH WANZ, of I Graben 29, Vienna, in the Empire of Austria,
Surgical Appliance Manufacturer, do hereby declare the nature of this invention,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The hood or head covering forming the object of the present invention is intended
to render it possible for the wearer to breathe in rooms or places filled with smoke
or noxious gases.
It consists of a hood or head covering entirely surrounding the head and
manufactured of gas proof material provided with an opening in front of the face
covered with a fine wire netting. Suitable means are provided near the lower edge
for securing the hood or head covering and fastening it to the body. It also has a
short nipple or tube to which is attached an air tube for the purpose of forcing
fresh air into the interior of the hood. When in use air is continuously forced into
the hood or head covering by means of a blower, pump or the like. This enables
the wearer to breathe and prevents the smoke or noxious gases from entering the
hood or head covering either through the wire neu.. or through openings between
the lower parts of the hood and the garments. The excess of air introduced
escapes with the exhaled or vitiated air from the lungs through the wire netting,
which latter also enables the person to see about him.
The accompanying drawing gives an illustration of the hood or head covering.
a represents the wire netting, which serves as a window and as an escape for the
vitiated air from the lungs together with the excess of air forced into the hood
from an outside source. bis the inlet tube through which the fresh air is forced
into the interior of the hood or head covering, which latter is attached to the body
by means of laces c passing under the arms, or in other suitable manner.
It is obvious that a man wearing a hood or head covering of the above
description can, without the slightest danger or fear of being suffocated, enter
rooms, mines or other places filled with smoke or noxious gases or the like as far
as the length of the air inlet tube will permit.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A hood or head covering to enable the wearer to breathe with safety in rooms
or places filled with smoke or noxious gases, and consisting mainly of a hood or
head covering of gas proof material entirely surrounding the head and fastened to
the body, the same being provided with a wire netting to serve as a window and as
an opening for the escape of the vitiated and excess air, and with a nipple to which
the air inlet tube is attached, substantially as herein shown and described.
2. The hood or head covering constructed substantially as herein shown and
described and for the purpose stated.
Dated this 9th day of August 1094.
Dated this 9th day of August 1094.
FRIEDRICH WANZ,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.