Improvements in and in Apparatus for the Manufacture of Bolsters for Railway Rolling Stock.
Year: 1896

page_text: Date of Application, 27th June. 1896
Complete Specification Left, 27th Mar.. 1897-Accepted, 19th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in and in Apparatus for the Manufacture of Bolsters
for Railway Rolling Stock.
We, SAMSON Fox, Engineer and Ironmaster, and THE LEEDS FORGE COMPANY,
LIMITED, Engineers, both of The Leeds Forge, Leeds in the County of York, do hereby
declare the nature of this invention to be as follows:-
According to this invention bolsters for railway rolling stock are pressed from
plates of mild steel to the required shape between male and female dies at one heat by
two operations of the press, for which purpose the dies are provided with readily
removable and attachable parts, the arrangement being such that the plate may be
first pressed to an approximately trough shape at the first operation and the flanged
end portions of the trough turned back over a portion of the female die by means of
projecting pieces that are attached temporarily to the male die.
The manufacture of bolsters according to this invention is effected as we will now
proceed to explain with reference to the accompanying drawings, premising that the
shapes of the dies will vary according to the form of bolster to be produced. In the
drawings,
Fig. 1 shows partly in longitudinal section and partly in side elevation; Fig. 2
partly in horizontal section and partly in plan; and Fig. 3 in cross section the
apparatus u-ed in carrying out the first pressing operation. Fig. 4 being a similar
view to Fig. 1 and Fig. 5 a plan showing the apparatus used in carrying out the
second operation.
The apparatus shown in Figs. 1 2 and 3 comprises a female die consisting of central
sections A with removable end sections B C and D, and a male die consisting of
central sections E with removable end sections Fall of the form shown. The apparatus
shown in Figs. 4 and 5 comprises the female die shown in Figs. 1, 2 and 3 but
without the end sections C and D and the male die consists of the male die shown
in the same figures but with the end pieces F replaced by other end pieces F of
different shape.
A plate of mild steel is roughly cut to the required size, and then heated to a
suitable temperature, is placed in position upon the female die shown in Figs. 12
and 3 which together with the heated plate thereon is raised by suitable mechanism,
such as an hydraulic press, towards the male die, whereby. the plate is pressed to the
trough-like shape shown in at G (Figs. 1 2 and 3). The female die together with
the partly formed bolster G thereon is then lowered or cleared from the male die and
the loose end parts CD of the female die are removed thus leaving the channelled
end portions of the pressed plate unsupported. The end sections F of the male die
(Figs. 1, 2 and 3) are then removed and replaced by the end sections F (Figs. 1
and 5) which project downwardly from the ends of the male die as shown and so
as to pass over the ends of the female die when the two dies are pressed together.
The female die thus becomes for the time being a male die and the male die
becomes a female die. The lower or female die with the heated and partly pressed
plate thereon is then again caused to approach the upper or male die, thus pressing
down the flanged end portions of the trough shaped plate under operation so as to
form outwardly flanged supports or depending legs as shown.
To facilitate the easy removal of the finished bolster G from the lower or female

page_text: die, the corner or radius pieces constituting the sections B, over which the end portions
of the plate are turned back are loose and fit recesses that are so formed in the ends
of the sections A as to be wider at the top than at the bottom, that is wedge shape,
so that, if the bolster contracts onto the lower or female die, the said corner or radius
pieces will be drawn out of place when the holster is being lifted or removed and
will afterwards fall back again into position in the recesses.
Improvements in and in Apparatus for the Manufacture of Bolsters
for Railway Rolling Stock.
We, SAMSON Fox, Engineer and Ironmaster, and THE LEEDS FORGE COMPANY,
Limited, Engineers, both of The Leeds Forge, Leeds, in the County of York, 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 :-
According to this invention bolsters for railway rolling stock are pressed from
plates of mild steel to the required shape between male and female dies at one heat
by two operations of the press, for which purpose the dies are provided with readily
removable and attachable parts, the arrangement being such that the plate may be
first pressed to an approximately trough shape at the first operation, and the flanged
end portions of the trough he afterwards turned back over a portion of the female
die by means of projecting pieces that are attached temporarily to the male die.
The manufacture of bolsters according to this invention is effected as we will now
proceed to explain with reference to the accompanying drawings, premising that the
shapes of the dies will vary according to the form of bolster to be produced. In the
drawings,
Fig. 1 shows partly in longitudinal section and partly in side elevation; Fig. 2
partly in horizontal section and partly in plan; and Fig. 3 in cross section, the
apparatus used in carrying out the first pressing operation, Fig. 4 being a similar
view to Fig. 1 and Fig. 5 a plan, showing the apparatus used in carrying out the
second operation.
The
The apparatus shown in Figs. 1 2 and 3 comprises a female die consisting of
central sections A. with removable end sections B C and D, and a male die consisting
of central sections E with removable end sections F all of the form shown.
apparatus shown in Figs. 4 and 5 comprise the female die shown in Figs. 1, 2 and 3
but without the end sections C and D, and the male die consists of the male die
shown in the same figures but with the end pieces F replaced by other end pieces F¹
of different shape.
The various sections constituting each die are adapted to be readily connected
together and disconnected, the female die being mounted upon a movable carrier and
the male die being connected to a suitable fixed support so as to project downwardly
therefrom, all as well understood to those skilled in the art to which this invention
relates.
The manufacture of a bolster by the aid of the dies shown is as follows:-
A plate of mild steel is roughly cut to the required size, and then, heated to a
suitable temperature, say to a temperature of 900° F., is placed in position upon the

page_text: female die, shown in Figs. 1, 2 and 3, which together with the heated plate thereon
is then raised by suitable mechanism, such as an hydraulic press, towards the fixed
male die, whereby the plate is pressed to the trough-like shape shown in at G (Figs. 1,
2 and 3). The female die together with the partly formed bolster G thereon, is then
lowered or cleared from the male die and the loose end parts C, D of the female die.
are removed thus leaving the channelled end portions of the pressed plate unsupported.
The end sections F of the male die (Figs. 1, 2 and 3) are then quickly removed
and replaced by the end sections F' (Figs. 4 and 5) which project downwardly from
the ends of the male die is shown and so as to pass over the ends of the female die
when the two dies are pressed together. The female die thus becomes for the time
being a male die and the male die becomes a female die. The lower or female die
with the still heated and partly pressed plate thereon is then again caused to approach
the upper or male die, thus pressing down the flanged end portions of the trough.
shaped plate under operation so as to form outwardly flanged supports or depending
legs as shown.
To facilitate the easy removal of the finished bolster G from the lower or female
die, the corner or radius pieces constituting the sections B, over which the end portions
of the plate are turned back are loose and fit recesses that are so formed in the ends
of the sections A as to be wider at the top than at the bottom, that is wedge shape,
so that, if the bolster contracts onto the lower or female die, the said corner or radius
pieces will be drawn out of place when the bolster is being lifted or removed and
will afterwards fall back again into position in the recesses.
The bolster thus pressed to shape is ready to be trimmed and completed in the
usual way.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The manufacture as hereinabove described of bolsters for rolling stock by
pressing a plate of suitable metal such as mild steel to an approximately trough
shape and bending back the flanged end portions of the trough as set forth.
2. For the manufacture of bolsters in the improved manner referred to in the
preceding claim, apparatus comprising dies constructed arranged and operating sub-
stantially as hereinbefore described with reference to and shown in the drawings
annexed.
Dated this A
For the Applicants,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.