Improvements in the Construction of Rolling Stock especially applicable for Narrow-gauge Railways.
Year: 1899

page_text: Date of Application, 19th Sept., 1899
Complete Specification Left, 19th June, 1900-Accepted, 21st July, 1900
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Rolling Stock especially
applicable for Narrow-gauge Railways.
We, FRANCIS LAWRENCE LANE, Engineer, and the LEEDS FORGE COMPANY
LIMITED, both of the Leeds Forge, Leeds, in the County of York, do hereby
declare the nature of this invention to be as follows:-
An object of this invention is to enable the weight of the underframes of
rolling stock, particularly that of the kind fitted with central draw and buffing
gear and used on narrow gauge railways, to be reduced without lessening the
strength of such underframes.
For this purpose an underframe according to this invention is constructed
with a backbone or longitudinal member, running from end to end of the under-
frame at or near its centre line and formed of one or more pressed steel longi-
tudinals which may, if necessary, be strengthened by means of a steel plate
secured to the top or the bottom flanges or to both the top and the bottom
flanges.
These longitudinals are made strong enough to withstand the whole of the
strains caused by the load, and the solebars with which an underframe is usually
constructed are dispensed with, whereby it is rendered possible to build up a
section having a higher moment of resistance to bending moment in proportion
to the weight of the section. The weight may be still further decreased by
forming by punching, drilling or otherwise, holes in the longitudinals near their
neutral axes. When more than one longitudinal is used they are firmly secured
together by pressed steel trays or flanged plates riveted to them. The longi-
tudinals may be made of the same section throughout or they may be
strengthened at or about the middle of their length or at any other necessary
point or points by being made at such point or points deeper, or with wider
flanges, or by the addition of steel plates riveted to the top and bottom flanges,
or either.
Each longitudinal may be made of one piece or of two or more pieces firmly
joined together.
The floor body of the vehicle is carried on these longitudinals and on light
side rails of bulb angle or other roller or pressed section, the said rails being
supported by means of pressed steel cantilever brackets or transoms projecting
from opposite sides of the central longitudinals and riveted or bolted thereto;
if necessary, these brackets or transoms may be further secured thereto
by gusset plates, angle-irons or other similar means. The bogie centre castings
or pivots are bolted or riveted to the longitudinals and the bogie side wearing
plates or brackets to the cantilever brackets or transoms. If the longitudinals
are made in two or more pieces the joints may conveniently be placed at or near
the transverse centre line of the bogie so that a single bracket or transom, to
which the side wearing plates or brackets may be attached, can be carried through
from side to side of the underframe at those points, thus adding to its stiffness.

page_text: The end longitudinals and headstocks are arranged in the usual manner for
carrying the draw and buffing gear. The underframe may, if required, be
stiffened diagonally by stays which may be flat.
Dated this 10th day of Santambor 1900
Improvements in the Construction of Rolling Stock especially
applicable for Narrow-gauge Railways.
We, FRANCIS LAWRENCE LANE, Engineer, and the LEEDS FORGE COMPANY
LIMITED, 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 per-
formed to be particularly described and ascertained in and by the following
statement:-
:-
An object of this invention is to enable the weight of the underframes of
rolling stock, particularly that of the kind fitted with central draw and buffing
gear and used on narrow gauge railways, to be reduced without lessening the
strength of such underframes.
Referring to the accompanying illustrative drawings.
Figs. 1 and 1ª are side elevations,
Fig. 2 a plan, and Figs. 3 and 4 are sections on the lines A-A and B-B Fig. 2
of an underframe according to this invention.
The underframe 1 is constructed with a backbone or longitudinal member,
running from end to end of the underframe at or near its centre line and formed
of two pressed steel longitudinals 2, 3 which may, if necessary be strengthened
by means of a steel plate 4 secured to the top flange 5 of the longitudinals 2
and 3.
In some cases, the backbone or longitudinal member may be formed of only
one longitudinal, or of more than two, and plates 4 may be secured to the bottom
flanges 5, 6 or to both the top and the bottom flanges of the longitudinals. The
longitudinals 23 are made strong enough to withstand the whole of the strains
caused by the load, and the solebars with which an underframe is usually con-
structed are dispensed with, whereby it is rendered possible to build up a section
having a higher moment of resistance to bending in proportion to the weight of the
section. The weight may be still further decreased by forming by punching drilling
or otherwise, holes (shown in dotted lines in Figs. 1 and 12) in the longitudinals
near their neutral axes. When more than one longitudinal is used they are
firmly secured together by pressed steel trays or flanged plates 7 riveted to and
between them. The longitudinals may be made of the same section throughout
or they may be strengthened at or about the middle of their length (as shown
in Figs. 1, 1 and 2) or at any other necessary point or points by being made
at such point or points deeper, or with wider flanges 5, 6, or by the addition of
the steel plates 4 riveted to the top and bottom flanges or either of them.
Each longitudinal may be made of one piece or of two or more pieces firmly
joined together.
The floor body of the vehicle is carried on the longitudinals 23 and on light
side rails 8 which are shown of bulb angle section but which may be of other
rolled or pressed section, these rails being supported by means of pressed steel

page_text: cantilever brackets or transoms 9 projecting from opposite sides of the central
longitudinals 2, 3 and riveted or bolted thereto; if necessary, these brackets or
transoms may be further secured thereto by gusset plates 10, angle-irons 11 or
other similar means. The bogie centre castings or pivots are bolted or riveted
to the longitudinals 2, 3 and the bogie side wearing plates or brackets to the
cantilever brackets or transoms 9. If the longitudinals are made in two or
more pieces the joints may conveniently be placed at or near the transverse
centre line of the bogie so that a single bracket or transom, to which the side
wearing plates or brackets may be attached, can be carried through from side
to side of the underframe at those points, thus adding to its stiffness. The end
longitudinals and headstocks 12 are arranged in the usual manner for carrying
the draw and buffing gear. The underframe may, if required, be stiffened diagon-
ally by stays which may be flat.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. An underframe for rolling stock formed with a pressed steel backbone or
longitudinal member running from end to end thereof at or near its centre line
and adapted to withstand the strains caused by the load, substantially as described.
2. An underframe for rolling stock constructed and arranged substantially
as described with reference to and shown in the accompanying illustrative
drawings.
Dated this 19th day of June 1900.
For the Applicants,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.