Improvements in or connected with Respirators or Lung Preservers.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Respirators or Lung Preservers.
I, GUSTAV ZIMMER, Merchant, of 82 Mark Lane, London, E.C., do hereby
declare the nature of this invention to be as follows:-
This invention for improvements in or connected with respirators or lung
preservers, has for its object to provide an improved appliance that can be readily
fitted over the mouth and nostrils of the wearer, for filtering all the air drawn
in by the wearer whilst the air expelled by the wearer readily passes out.
In one form of respirator constructed according to this invention a bucket
shaped piece of vulcanised indiarubber perforated at the bottom is provided
with an internal flange so that moist sponge or other filtering medium can be
inserted and retained between the perforated bottom and the flange. Outside the
flange is a perforated boss over which fits a perforated cap. A. mica or other light
disc is inserted between the boss and the cap and is free to move between the
same so that it acts as a valve. The upper edge of the respirator is very flexible
and has a recess corresponding with the bridge of the nose and it is provided
with two elastic straps adapted to be passed behind the head of the bearer and
be secured by a buckle or other fastening.
In a modification the lower or outer part of the respirator is made of
aluminium, and is secured to the inner or flexible part fitting against the face
of the wearer.
In some cases a projection or shield for the eyes is also attached to the
respirator.
Dated this 30th day of November 1900
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.
I, GUSTAV ZIMMER, Merchant, of 82 Mark Lane, London, E.C., do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This invention for improvements in or connected with respirators or lung
preservers, has for its object to provide an improved appliance that can be readily
fitted over the mouth and nostrils of the wearer, for filtering all the air drawn
in by the wearer whilst the air expelled by the wearer readily passes out.
בנחית

page_text: In one form of respirator constructed according to this invention a bucket
shaped piece of vulcanised india rubber perforated at the bottom is provided
with an internal flange so that moist sponge or other filtering medium can be
inserted and retained between the perforated bottom and the flange. Outside the
flange is a perforated boss over which fits a perforated cap. A. mica or other light
disc is inserted between the boss and the cap and is free to move between the
same so that it acts as a valve. The upper edge of the respirator is very flexible
and has a recess corresponding with the bridge of the nose and it is provided
with two elastic straps adapted to be passed behind the head of the wearer and
be secured by a buckle or other fastening.
In a modification the lower or outer part of the respirator is made of celluloid
or aluminium, and is secured to the inner or flexible part fitting against the face
of the wearer.
In some cases a projection or shield for the eyes is also attached to the
respirator.
In the accompanying sheet of illustrative drawings: Fig. 1 is a front view of
a respirator constructed according to this invention and Fig. 2 is a side view
and Fig. 3 a longitudinal section of the same. Fig. 4 is a detail view of the
valve.
f
The main body a of the respirator is constructed of flexible vulcanised india-
rubber having at its outer end an internal flange b and an internal circumferential
groove c. The end of the respirator consists of the dish-shaped piece of celluloid d
perforated at its outer end with holes e and having a lip h that is received in
the groove c. Sponge f is inserted in the celuloid dish d and is retained by the
flange b. The body a is cut away at i to make room for the bridge of the nose
of the wearer and at its upper part is provided with a perforated boss 7 on which
fits a metal cap m provided with holes n. A disc o of mica or other light
material rests on the boss and works freely between the end of the cap and the
boss so as to form a light valve allowing of the emission of air but not of the
admission. The body a is also provided with elastic or other straps p having any
suitable fastening device r.
In use the respirator is placed over the mouth and nostrils of the user and is
retained by the straps p that are passed over the back of the Head. In breathing
air is drawn in through the sponge that is preferably moistened and is expelled
through the boss past the disc valve o.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
The improvements in respirators substantially as described with reference to
the drawings.
Dated this 30th day of August 1897.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.