Improvements in or connected with Face-pieces or Masks for Use in connection with the Administration of Anaesthetics, and for similar purposes.
Year: 1899

page_text: Date of Application, 21st Sept., 1899-Accepted, 21st Oct., 1899
COMPLETE SPECIFICATION.
Improvements in or connected with Face-pieces or Masks for Use in
connection with the Administration of Anaesthetics, and for
similar purposes.
I, ERNEST WILLIAM POOLE, of 54, Poland Street, London, W., 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:-
:-
This invention relates to improvements in or connected with face-pieces or
masks for use in connection with the administration of anaesthetics and for
similar purposes, the object being to provide a simple and efficient means of
securing the pad, which comes into contact with the face, to the face-piece or
mask, in such a manner that while it is readily removable at will, a practically
air tight joint is formed between them, whereas, with the usual method of making
such connection, the pad is furnished with a flange or extension, designed to be
stretched over the edge of the face piece or mask, and which, after being retained
in position for any length of time, looses its elasticity, thereby causing the joint
to become leaky and defective, while there is also a tendency for it to slip.
Now according to this invention, the essential features consist in furnishing
the pad with a projecting rib or thickened part, and in forming the aforesaid
face piece or mask with a flange or inturned edge, under which the aforesaid
rib or projecting part of the pad is pressed, and in this manner the pad is firmly
and securely retained in place, and a practically air-tight joint formed between
it and the face-piece or mask.
In order that this invention may be more fully understood, I will now proceed
to describe same with reference to the accompanying drawings in which:
Fig. 1 is a side elevation of the face piece or mask showing the pad in position.
Fig. 2 is a back view of the face-piece or mask with the pad removed.
Fig. 3 is a partial cross section thereof.
Fig. 4 is an elevation of the pad detached, and
Fig. 5 is a cross section of the pad.
According to this invention, the pad is preferably of hollow tubular form,
and capable of being inflated in any conveneint manner through a suitable valve
or cock connected to the extremity of the tubular extension t, while it may be
formed solid in cross section or in any other convenient shape or form and of
suitable soft material. The pad p is furnished with a projecting rib or thickened
or enlarged part r, preferably formed integrally with the pad p, and of hollow
tubular form, with a wire or other stiffening rib such as w contained therein
for the purpose of keeping the pad approximately to the required form, or the
aforesaid rib or thickened projecting part r may be formed solid, with or without
a wire or other stiffening piece running through it, or it may, as aforesaid, consist
of a hollow tubular part, and be connected with the pad p in any convenient and
suitable manner, 30 as to allow of its being simultaneously inflated with the
3

page_text: pad 2, or it may be separately inflated by the employment of a separate valve
or cock and connection.
The face-piece or mask a, which is of the required form, is furnished with
a flange or inturned edge such as b, bent inwards to a suitable angle, beneath
which the rib or thickened projecting part is pressed, and in this manner, the
pad is secured to the face piece or mask a in such a way that a practically
air-tight joint is formed between them, the flange or inturned edge b, and the
surrounding sides of the face-piece or mask, forming the recess within which
the rib or thickened projecting part r is contained, while when required the pad
can be quickly and easily removed for cleaning or other purposes. The face-piece
or mask a is furnished with a screw threaded nozzle n of the usual form for
connection to an anaesthetic administering or other apparatus.
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:
1/. In a face-piece or mask for use in connection with the administering of
anaesthetics and for other similar purposes, the combination of a pad such as p
furnished with a projecting rib or thickened part such as r; with a face-piece
or mask such as a, furnished with a flange or inturned edge such a b, sub-
stantially as herein described and shown with reference to the accompanying
drawings, and for the purposes specified.
.2/. The improvements in or connected with face-pieces or masks for use in
connection with the administration of anaesthetics and other similar purposes,
consisting in furnishing a pneumatic or other pad such as with a projecting
rib or thickened part such as r and providing the face-piece or mask a. with a
flange or inturned part or edge such as b, under which the rib or projecting
thickened part is designed to be pressed and retained, substantially as herein
described and shown with reference to the accompanying drawings, and for the
purposes specified.
Dated this 20th down of and
7000
CASSELL & Co.,
22, Glasshouse Street, Regent Street, London, W., Agent for the Applicant.