IMPROVEMENTS IN RAILWAY- BUFFERS
Year: 1884

page_text: I ABRAHAM POPE, of 190 Edgware Road, in the County of Middlesex, Engineer
do hereby declare the nature of said invention for "IMPROVEMENTS IN RAILWAY-
BUFFERS to be as follows:
"
-
My invention relates to buffers of that class wherein the box or case has its neck
provided with a bush or sleeve which has to be so constructed and arranged as .to
permit the use of a shank or plunger with a collar formed solidly, or in one piece,
therewith. The said bush or sleeve forms a guide to the shank, and in combination
with the said collar, serves as a stop which prevents the accidental displacement or
removal of the sliding part of the buffer from its box or case.
My invention is designed to simplify the construction and diminish the cost of
these buffers.
For this purpose I cast the said bush or sleeve in a mould around the shank of
the buffer. The mould is made of such dimensions that when taken therefrom the
said bush will properly enter and fit the neck of the case. Then having placed the
bush (with the shank enclosed thereby) in its proper position in the case I drill, or
otherwise form, through the neck, at suitable distances apart, holes of a diameter
say of three quarters of an inch, more or less. And I form corresponding holes
partly through the cast bush or sleeve. Into these holes in the neck and bush,
I insert pins or studs which effectually securo the two parts together so that the
bush cannot be forced endwise or turned around in the neck. I then apply outside
the neck a hoop or ring of wrought iron or other suitable metal which covers the
said studs and prevents their removal from their holes. I prefer to secure this
hoop or ring on the case by screwing or shrinking it on the outer end of the neck.
In some cases, instead of employing the pins or studs above described I form
longitudinal slits in the neck of the box or case so as to divide the same into three,
or any other suitable number of, segments; and I form the said neck with an
external taper screw-thread so that the hoop or ring (which is made with a corre-
spondingly tapered internal screw-thread) can be screwed thereon and will press
the said segments of the neck towards each other and against the bush or sleeve.
By these means the said bush or sleeve is firmly held and prevented from moving
in the said neck. I prefer, in this case, to make the bush slightly taper externally
from its inner end to its outer end; the said bush will be more firmly secured in
the box or case and cannot be forced therefrom by the recoil of the spring.
ค
11001

page_text: :
I, ABRAHAM POPE, of 190, Edgware Road, in the County of Middlesex, Engineer,
do hereby declare the nature of my invention for "IMPROVEMENTS IN RAILWAY-
BUFFERS and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
"
My invention relates to buffers of that class wherein the box or case has its neck
provided with a bush or sleeve, which must be so constructed and arranged as to
..permit the use of a plunger with a collar formed solidly or in one piece therewith.
This bush or sleeve forms a guide to the plunger and, in combination with the
said collar, serves as a stop which prevents the displacement or removal of the
said plunger.
My invention is designed to simplify the construction and diminish the cost of
"these buffers.
For this purpose I first cast the said bush or sleeve in a mould around the
plunger-rod.
I then place the bush (with the plunger-rod enclosed or encircled thereby) in its
proper position in the case, and secure it therein as hereinafter described.
In the accompanying drawings, I have shewn how my said invention may be
conveniently and advantageously carried into practice.
Figure 1 is a central longitudinal section of one form of my railway-buffer, with
the plunger sliéwn in elevation.
Figure 2 is a section on the line x, x, Figure 1.
Figure 3 is a central longitudinal section (with the plunger shewn in elevation),
"illustrating a slight modification of my Invention.
1
Figure 4 is a section on the line y, y, Figure 3.
Like letters indicate corresponding parts throughout the drawings.
a is the box or case, bis the plunger, which has a collar b' formed solidly or in
one piece therewith. c is the spring, and d is the bush or sleeve, which is cast in a
mould around the plunger-rod b². This mould is made of such dimensions that,
when taken therefrom, the said bush will properly enter and fit the neck of the
case: And, in order that the plunger shall be free to slide in the bush or sleeve, it
should, previous to the casting of the said bush or sleeve thereon, be covered with
two coats of coal-tar which are permitted to dry. The casting of the bush or sleeve
burns these coats of coal-tar, so that they can be readily removed, leaving the
plunger free. It is obvious, however, that other suitable means may be used for
this purpose. The said bush is thus formed in its place between the head of the
said plunger and the collar b'.
In the buffer shewn in Figures 1 and 2, I secure the bush or sleeve d in the box
or case a in the following manner, that is to say-I drill or otherwise form
through the neck of the latter, at suitable distances apart, holes a¹ of a diameter
say of three quarters of an inch, but these holes may be larger or smaller if desired.
And I form corresponding holes d¹ partly through the cast bush or sleeve d. Into
these holes in the neck and bush, I insert pins or studs c, which effectually secure
the two parts together so that the bush cannot be forced endwise or turned around
in the neck. I then apply outside the neck, a hoop or ring f of wrought iron or.
other suitable metal, which covers the said studs and prevents their accidental
removal or displacement. I prefer to secure this hoop or ring on the case either by
screwing it on the outer end of the neck, as shewn, or by shrinking it thereon; but
it may be secured in any other convenient manner.

page_text: In some cases, instead of employing the pins or studs above described, I secure.
the bush or sleeve d in the case a as shewn in Figures 3 and 4, that is to say:-
I form longitudinal slits a² in the neck of the said box or case, so as to divide the
same into three or any other suitable number of segments; and I make the said
neck slightly tapered externally towards its outer end and form it with an external
screw-thread, so that the hoop or ring f' (which is correspondingly tapered and
has an internal screw-thread) can be screwed thereon and will then press the said
segments of the neck towards each other and against the said bush or sleeve. By
these means the said bush or sleeve is firmly held and prevented from moving in
the said neck. I prefer, in this case, to make the bush slightly tapered externally
from its inner to its outer end; it will thus be more firmly secured in the box or
case, and its displacement by the recoil of the spring will be prevented.
The plunger and the bush or sleeve can be readily removed from the box or case,
when necessary, by simply removing the hoop or ring f¹, or by removing the hoop
or ring fand the pins or studs e.
It is obvious that, after the bush or sleeve is cast on the plunger, I can secure it
in the box or case by other means than those above described and shewn in the
accompanying drawings.
By my invention, I am enabled to employ a bush or sleeve formed in one piece,
and a plunger with a solid collar, instead of employing a plunger with a removable
collar, or forming the bush or sleeve in two or more pieces, as heretofore practised.
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
First. A buffer wherein the bush or sleeve for guiding the plunger and retaining
the same in the box or case is formed by casting it in a mould around the said
plunger, between the head and a collar formed solidly therewith.
Second. The means for securing the said bush or sleeve in the box or case,
substantially as described with reference to Figures 1 and 2 or Figures 3 and 4 of
the drawings.
Dated this old d
T
1007
HASELTINE, LAKE & Co.
For the Applicant.