Improvements in Bogies for Rolling Stock.
Year: 1893

page_text: Date of Application, 29th Aug., 1893-Accepted, 7th Oct., 1893:
COMPLETE SPECIFICATION.
Improvements in Bogies for Rolling Stock.
I, FREDERICK ATTOCK, of 131 Palatine Road, Fernyhurst, near Manchester,
in the County of Lancaster, Engineer, 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 improvements in the construction of bogies for
rolling stock, and it has for object to enable the springs upon which the bolster
directly bears to be placed at a greater distance apart, for a given width of bogie
frame, than has heretofore been usual, so as to thereby reduce the vibration
and oscillation imparted to the body of the vehicle when running at high speeds,
when passing over points and crossings, and when entering and leaving curves.
For this purpose I so construct and arrange the swing bolster, the spring beam,
or beams, and the suspension rods, that the points of contact or support between
the bolster springs, or some of them and the spring beam and swing bolster are
located outside the bogie frame, so that the springs at the two sides of the bogie
frame will be at a greater distance apart, for a given width of bogie frame, than
has heretofore been usual.
In order that the manner of carrying out my invention may be readily under-
stood will proceed to explain the same by aid of the accompanying drawings, in
which
Fig. 1 shows a bogie constructed according to this invention, the left hand half
of the figure being a cross section on the line A B of Fig. 3, and the right hand
half, a cross section on the line C D of the same figure.
Figs. 2 and 3 are respectively a side elevation, and a longitudinal central section
of the central portion of the bogie and attached parts.
1 is a spring beam supported near its ends by knife edge bearings carried by
pairs of suspension rods 3 that are jointed at 4 to brackets 5 carried by the
longitudinal side members 6 of the bogie frame. 7 is the swing bolster. It is
made in the example shown, of hollow or box form, and is provided with the
usual central step or bearing 8 for the correspondingly formed pivot 9, fixed to
the lower side of the under frame 11 of the body of the vehicle to be supported.
and with radiating bearings 10 for the corresponding bearings 10 also fixed to
the lower side of the said under frame. 12 is a centre pin or bolt by which
the pivot 9 is held upon its step or bearing 8 as well understood.
13, 13, are springs carried by the spring beam 1 and upon which the swing
bolster 7 is directly supported. These springs in the examples shown, are made of
blocks of india rubber of conical form, and are arranged in two groups, one at each
end of the beam, there being three or any number of springs in each group. Each
spring is suitably retained in place, as for example by projections 1 and 7", that
enter recesses in its bottom and top, and are forced to the upper and under sides
respectively of the spring beam and swing bolster. As will be obvious however
I do not confine myself to india-rubber springs, as other springs, such as coiled
metal springs, or metal bearing springs of elliptical form, may be used if desired.
To enable the points of contact of the springs and bolster to be arranged at
a greater distance apart thau heretofore, for a given width of bogie frame, in
order to obtain the advantages in running herein before mentioned, the ends 7*
of the lower side of the swing bolster, and the ends 1 of the spring beam, are
made to extend outwardly and beyond the longitudinal or side members 6 of the
bogie frame, and the brackets 5 for carrying the pairs of suspension rods 3 are
secured to the outer or it may be to the inner sides of the said side members in
such a manner as to effectually support the said extended end portions of the

page_text: spring beam and the parts carried thereby. By this means two of the three
springs in each group, in the example taken can be arranged, as shown, outside the
vertical plane containing the corresponding side member 6 of the bogie frame.
As will be obvious my invention can be applied to bogies having two or more
pairs of wheels and constructed with one or more spring beams.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
A bogie in which the spring beam, (or beams) swing bolster, and suspension rods,
are so constructed and arranged in relation to the bogie frame that the points of
contact or support between the bolster springs, or some of them, and the spring
beam and swing bolster are located outside the plane of the longitudinal side
members of the said bogie frame substantially as described and shown for the
purposes specified.
Dated this 29th day of August 1893.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.