IMPROVE- MENTS IN THE CONSTRUCTION OF OUTSIDE BUFFERS FOR RAILWAY VEHICLES
Year: 1884

page_text: I, CECIL GEORGE OWEN, of 60 Darnley Road, Hackney, in the County of
Middlesex, Engineer, do hereby declare the nature of said invention for "IMPROVE-
MENTS IN THE CONSTRUCTION OF OUTSIDE BUFFERS FOR RAILWAY VEHICLES" to bo
as follows:-
:
My invention relates to outside buffers for railway vehicles and is designed to
simplify their construction and reduce the number of their component parts.
To this end according to my invention I use for the purpose of retaining the
buffer spring and plunger within the outer case, a thin longitudinal tube of an
external diameter, slightly less than the internal diameter of the hollow plunger,
and flanged at one end and closed at the other with the exception of a hole, through
which the rod can slide. This tube is placed within the buffer case, and the
plunger (to which the rod is attached by forging or screwing and rivetting) is
inserted between the tube and the outer case.
A plate provided with a longitudinal nozzle is shrunk on the rod, and abuts
against the inner surface of the closed end of the before mentioned tube to keep
the plunger and springs in position. The base plate and the flanges of the tube
and outer case are secured together by rivetting.
Instead of shrinking the nozzled plate on the rod, I may forge the plate and rod
in one solid piece and screw and rivet the end into the plunger head.
Nozzled plates such as described besides being used in buffers constructed as
above explained may also be applied with advantage in other.buffers having solid
plungers the plunger rod being turned to two diameters, so as to form a shoulder,.
and the nozzled plate being shrunk on the smaller portion with the back of the
plate home against the shoulder. The mouth of the buffer case may be closed by
an inserted bush or may be forged solid.

page_text: "
I, CECIL GEORGE OWEN, of 60. Darnley Road, Hackney, in the County of
Middlesex, Engineer, do hereby declare the nature of my invention for "IMPROVE-
MENTS IN THE CONSTRUCTION OF OUTSIDE BUFFERS FOR RAILWAY VEHICLES 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 outside buffers for railway vehicles and is designed to
simplify their construction and reduce the number of their component parts, at the
same time increasing their strength and durability.
To this end according to my invention, in hollow plunger buffers, I use for the
purpose of retaining the buffing spring and plunger in position within the outer or
buffer case, a thin longitudinal retaining tube or part tube, of an external diameter
slightly less than the internal diameter of the hollow plunger, and flanged outwards
at the base and closed or flanged inwards at the other end, leaving a hole through
which the buffer rod or spindle passes.
This tube is placed within and concentric with the outer or buffer case, and the
plunger (to which the rod is forged or fixed by screwing and rivetting) is inserted
in the annular space between the tube and the outer case.
A plate with a longitudinal nozzle of any suitable length (which nozzle I prefer
to-form in one piece with the said plate) is shrunk on the buffer rod or spindle,
which plate in its normal position abuts against the inner surface of the closed erid
of the before mentioned retaining tube, which takes the rebound of the buffing
spring or springs and all thrusts tending to displace the plunger from its position
within the buffer case.
As will be obvious the nozzled plate might be screwed or otherwise fastened to
the buffer rod or spindle, but I recommend shrinking for the sake of simplicity
and cheapness. The base plate and flanges of the buffer case and retaining tube
are secured by rivetting.
Instead of shrinking the nozzled plate on the buffer rod I may forge the rod and
plate in one solid piece and screw and rivet the end of it into the head of the
plunger,
Plates with nozzles such as described above besides being used as explained may
with advantage be applied to buffers having solid plungers, the plunger rod being
turned to two diameters so as to form a shoulder, and the plate and nozzle being.
shrunk or otherwise fastened on the smaller portion with the back of the plate
home against the shoulder.
The buffer case is so constructed that the mouth is closed. This may be done by
an inserted bush or by forging into the requisite shape.
It is to be noted that the grip obtained by shrinking the nozzled plates on the
buffer rod or spindle has merely to withstand the momentum in the plunger from
the rebound of the buffing springs, the thrust from this rebound being taken either
by the buffer case or by the longitudinal retaining tube.
:

page_text: In the accompanying sheet of illustrated drawings I have for the sake of
clearness omitted the springs the position of which will be readily understood, and
I would remark that as will be evident the form of case can be varied according
to whether it be desired to use steel or india-rubber springs.
Fig 1 shews in longitudinal section a hollow plunger buffer. Fig 1a is a section
through A. B. showing the base in face view. a is the hollow plunger. b the buffer
rod or spindle, in this case forged with the plunger, c is the buffer or outer case,
d the plate with nozzle d' which is represented as being in one piece with the plate.
e the longitudinal retaining tube, and ƒ the base plate.
Fig 2 shews also in longitudinal section a hollow plunger buffer; In this case
the plate d is forged in one piece with the buffer rod b and screwed and rivetted
into the plunger a. In other respects this arrangement resembles that illustrated
in Figs 1 and 1ª and is similarly lettered. Fig 2a is a section through A¹ B' Fig 2.
Fig 3 shews in. longitudinal section a solid plunger buffer wherein a is the
plunger, b the buffer rod or spindle, c the buffer case, d the plate, d' its nozzle
and the base plate. This arrangement will be readily understood from the
description already given.
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 I am
aware buffers have been made with a base plate having a dished or cupped part
extending into the buffer case and the buffer spring or springs has or have been
interposed between the end of such. dished or cupped part and the head of the
hollow plunger, the buffer rod or spindle. being made with a screw thread provided
with a nut to limit the outward movement of the buffer, but I do not claim such a
construction as being of my invention :-according to my plan it will be noted that
the spring or springs is or are near the base of the buffer and within the guide
tube so as to be kept in place by it and to be compressed between the base plate
and a plate fixed on the buffer rod or spindle. By this arrangement the hollow
plunger is efficiently guided near its outer end or head. What I claim is
1. The use for guiding and retaining the hollow plunger of a buffer in position,
of an internal longitudinal retaining tube or part tube arranged to contain the
buffer spring or springs, and over which tube or part tube the hollow plunger is
arranged to work substantially as described.
2. The use in a buffer of a plate such as d with a nozzle or tube such as l¹
shrunk or otherwise fastened on the buffer rod or spindle for the purpose of
retaining the plunger and spring or springs in position substantially as described.
3. In a buffer, the combination with a hollow plunger furnished with a buffer
rod or spindle, of a guide and retaining. tube such as e over which the hollow
plunger works and a plate such as d fastened on the buffer rod or spindle so as to
work within the guide tube e substantially as described.
4. The improved buffer constructed and arranged as shewn in Figs 1 and 1° or
modified as shewn in Figs 2 and 2ª.