Vacuum Brake Apparatus.
Year: 1886

page_text: Date of Application, 13th Nov., 1886
Complete Left, 12th Aug., 1887.
Complete Accepted, 20th Sept., 1887.
Railway Vacuum Brake Apparatus.
I JAMES JONES of 15 Parliament Street Dublin Ireland India Rubber Manufacturer
do hereby declare the nature of this invention to be as follows:―
This Invention has reference to an improved Diaphragm for use in connection with
the cylinder used in Railway Vacuum Brake Apparatus and has for its object tho
production of a more flexible durable and economical article than hitherto produced
as far as I am aware.
My Invention consists in taking several, layers or plys of cotton or other cloth
prepared with solution of india rubber to make it air tight and adhesive to itself and
its adjacent layer.
These layers or plys are cut in the shape of disks of suitable diameter and are
treated in the following manner that is to say each layer or ply is cut round its
circumference with a series of radial slits and the first layer or ply is placed on a
model of suitable form and dimensions to impart the necessary shape and curves when
the radial flaps (formed by the radial cuts) are carefully turned down on the sides of
the model and pasted one over the other in an overlapping manner.
The next layer or ply used in the construction of the diaphragm is then laid on
and the radial flaps of this layer or ply turned down over the radial flaps of the first
layer or ply. A third and fourth layer or ply of the composition material according
to the strength of diaphragm to be produced is now laid on over the previously
described layers or plys and the radial flaps turned down and treated in exactly a
similar manner to those of the first described layers or plys taking care to break joints
when turning down each series of flaps with those of the previous series.
Dated this Tenth day of November 1986
J. K. FAHIE & SON,
10, Leinster Street, Dublin,
Agents for Applicant.

page_text: Railway Vacuum Brake Apparatus.
I JAMES JONES of 15 Parliament Street Dublin Ireland, India-rubber Manufac-
turer 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 has reference to an improved construction of diaphragm for use in
Railway Vacuum Brake apparatus, of a more flexible, durable, and economical kind
than hitherto employed as far as I am aware.
My Invention consists in taking several layers or plys of cotton, or other suitable
cloth prepared with a solution of india-rubber to make it air tight and also to render
it capable of adhesion to itself and to adjacent layers or plys.
These layers or plys are cut in the shape of wafers or disks and each wafer or disk
is then cut by a series of radial slits entering from the circumference towards the
centre to a certain extent.
One of these wafers, or disks as thus prepared, is then placed on a model of suitable
shape and dimensions according to the shape and dimensions of the diaphragm to be
produced when the radial portions or flaps (formed by the radial slits) are carefully
turned down on the side of the model, and pasted together one, overlapping the other.
A second wafer or disk is now laid on over the first, and its radial portions or flaps
turned down over the radial portions or flaps of the aforesaid wafer or disk and
pasted in the same way.
A third, and fourth, wafer or disk of the composition material according to the
strength of diaphragm required, is then laid on in succession over those previously
described the radial portions or flaps of which are treated exactly in a similar manner,
care being taken to break joints when turning down the radial portions or flaps of one
wafer or disk over those of the previously arranged wafer or disk.
Diaphragms as thus prepared are of considerable strength while at the same time
they afford the necessary flexibility and elasticity.
They are also very durable and extremely sensitive and economical when compared
with similar articles at present in use.
my
Having now particularly described and ascertained the nature of said Invention
and in what manner the same is to be performed I declare that what I claim is
1st. The method of preparing layers or plys of cotton or other suitable cloth for
the construction of diaphragms, for use in Railway Vacuum Brake Apparatus, in the
manner substantially as herein specified.
2nd. The use and application in Railway Vacuum Brake apparatus of diaphragms
constructed in the manner substantially as herein described and set forth.
L 1007
J. K. FAHIE & SON,
10, Leinster Street, Dublin,
Agents for Applicant.