Year: 1886

page_text: I, THOMAS ENGLISH of The War Office, Whitehall in the County of Middlesex,
Major in the Royal Engineers, do hereby declare the nature of this invention to be
as follows:-
My invention relates to improved means whereby a bogie truck is caused to tend
to return to its central position relatively to the rigid wheel base of the locomotive
For this
or other vehicle after being shifted laterally when passing over a curve.
purpose the bogie is connected to the vehicle by an approximately horizontal bar
or frame engaging with a vertical pin situated between the bogie and the rigid
wheel base on the central line of the vehicle, and, in the case of a four wheeled
bogie, I provide the bogie also with two transverse beams or bearers, at some
distance apart, having at top at their middle or in the axial line of the vehicle,
two bearings carrying a strong horizontal pin or shaft which consequently also lies
in the axial line of the vehicle, and on which is hung, between the bearers, a
strong shaped link. On the middle of the bend of this link is mounted a strong
vertical stud or pivot, provided also with a horizontal bearing or eye in which the
link can turn and slide. Upon the vertical stud or pivot rests a socket provided
on the underside of a transverse bearer fixed to the rigid frame of the vehicle. The
bogie is provided at the middle of its side-cheeks with strong bearing springs the
ends of which are carried by the axle boxes of the wheels, which work in horn
plates on the bogie frame. The action of the above construction is as follows.
The transverse bearer of the rigid frame transmits the load of the vehicle through
the vertical stud or pivot to the bend of the link through the limbs of which it is
transmitted to the transverse bearers of the bogie frame, from which it is lastly
transmitted through the springs to the axle boxes. When running on a straight
road the suspension axis of the link and the axis of the pivot below both lie in
the vertical axial plane of the vehicle; that is to say, the link hangs vertically
downwards. When owing to the vehicle passing on to a curve, the bogie frame
is made to move laterally more or less out of its central position relative to the
rigid frame of the vehicle, it follows that the bearings carrying the link also
move out of the axial plane of the vehicle, and consequently the link is made to
assume a more or less inclined position. In order to enable it to do so, as its upper
D
17

page_text: bearings are carried by the road wheels and consequently cannot descend, its loop
must necessarily rise to an extent equal to the versed sine of the vertical angle
through which it is moved, and it is thus made to raise the load resting on its
vertical pivot. Thus while the bogie is in the shifted position, the load on the
loop of the link tends to descend and thus to bring this back into its vertical
central position, and consequently there will always he a tendency to bring the
bogie also back into its central position. In applying the above described
construction to two-wheeled bogies, the arrangement is reversed, that is to say,
the loop of the link lies in an upward direction, the bearings of the two ends
thereof being carried by two transverse bearers on the frame of the engine or other
vehicle while the stud or pivot carried by its loop rests in a socket carried by the
centre of a strong laminated bearing spring situated over and parallel to the axle
of the road wheels and resting with its ends upon the axle boxes, the socket being
also rigidly connected to two cross frames forming the horn plates for the axle
boxes.
The ends of the link may either be carried by a strong horizontal pin or shaft
as before, or they may be bent outwards so as themselves to form trunnions carried
by the bearings on the engine frame.
It is preferred in either of the above constructions, to arrange the vertical pin
by which the bogie is connected to the engine or other vehicle in such a position
that it is equidistant from the centre of the rigid wheel base and the centre of the
wheel base of the bogie, but this is not absolutely necessary to the action as above
described.

page_text: Stock of Railways and Tramways.
I, THOMAS ENGLISH, of The War Office, Whitehall, in the County of Middlesex,
Major in the Royal Engineers, 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 :-
My invention relates to improved means whereby a bogie truck is caused to tend
to return to its central position relatively to the rigid wheel base of the locomotive
or other vehicle after being shifted laterally when passing over a curve.
For this purpose the bogie is connected to the vehicle as I will describe referring
to the accompanying drawings.
Figs. 1 to 3 shew one arrangement adapted for a four wheel bogie. Fig. 1 shews
a longitudinal section, Fig. 2 a half plan and half sectional plan and Fig. 3ª half
end view and half transverse section.
The framing A of the bogie is jointed to a radius frame B which is pivotted to
a perch pin C, in the axial line of the vehicle, such pin being by preference situated
equidistant from the centre of the rigid wheel base and the centre of the bogie
wheel base. D D are two transverse frames projecting down from the body of the
engine or vehicle and carrying at their lower ends a strong horizontal shaft E
lying in the axial line of the vehicle, on which is mounted the U shaped link F, in
such manner that its eyes are capable of sliding to and fro to a slight extent along
the shaft E. On the loop F¹ of the link is mounted an eye G having a vertical
stud or pivot G¹ which takes a bearing in a socket H on a transverse beam A¹
(forming part of the bogie frame A) which rests on springs I carried by the axle
boxes J, that work in the horn plates on the bogie frame.
The action of the above described arrangement is as follows. The transverse
frames D D transmit the load of the vehicle through the shaft E, link F and
stud G¹ to the transverse frame A¹ of the bogie, from which it is again transmitted
through the springs I to the axle boxes J.
When running on a straight road, the axis of the shaft E and that of the
bearing G both lie in one and the same vertical plane in the axial line of the
vehicle, the bogie having thus a central position relatively to the vehicle. When,
owing to the vehicle passing on to a curve, the bogie frame is made to move
laterally more or less out of its central position, it follows that the bearing G
carrying the bend of the link F also moves out of the axial plane of the vehicle,
and consequently the link is made to assume a more or less inclined position.
In order to enable it to do so, either the springs I must be compressed to a
certain extent, by the downward motion of the loop of the link, or the lower ends
of the link and with them the body of the vehicle must rise to an extent equal
to the versed sine of the angle through which the link is deflected from the
vertical or both these actions will take place simultaneously. It will be seen that,
while the bogie is in the shifted position, there will be a tendency to bring
the link F back into its vertical position either by the downward pressure exerted

page_text: upon the shaft E by the frames D or by the upward pressure oxerted by the
springs I upon the bearer A¹ and stud G¹ or by both combined, which will tend to
bring the bogie to its central position.
As the lateral movement of the bearing G will take place in a circular arc whose
centre is at C, the link F requires to have a corresponding amount of longitudinal
play, upon the shaft E as before described, in order to allow of such motion.
Figs. 4 to 6 shew a similar arrangement to that above described applied to a two
wheel bogie. Fig. 4 shews a longitudinal section, Fig. 5 a part plan and part
sectional plan, and Fig. 6 a part end view and part transverse section. In this
arrangement, the link F, instead of being mounted on a pin carried by the trans-
veise frames D, has trunnions F formed on its ends, that are carried in bearings
on the frames D, and the transverse frame A¹ that supports the pivot or stud G¹ is
attached to the loop K¹ of a transverse spring K, the ends of which bear upon the
axle boxes J of the wheels. The construction and mode of action is otherwise the
same as previously described and need therefore not be further referred to.
Fig. 7 shews a longitudinal section, and Fig. 8 a part cross section of a modified
arrangement for four wheel bogies, in which the link F is arranged in an inverted
position, the two ends being fitted by eyes on the shaft E which in this case is
carried by two transverse frames A A¹ of the bogie A, the body of the vehicle
being provided with a transverse frame D carrying the socket by which it rests
upon the stud or swivel G¹ whose eye G is carried by the loop of the link in such
a manner that the latter can slide longitudinally with a small amount of play
therein. The transverse frames A¹ A₁ are bolted to the side frames A of the
bogie, that rest upon the middles of the spring I, the ends of which are carried
by the axle boxes J, as in the first described arrangement. The action is precisely
the same as with the other arrangements.
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:
Connecting a bogie to a locomotive or other vehicle by means of a single central
link swinging transversely, to the lower part of which link the body of the vehicle
is jointed, whilst from its upper part the load is transmitted through laminated
springs to the axle boxes of the bogie, substantially as and for the purpose herein
set forth, and illustrated by the accompanying drawings.
Dated this 15th day of November 1886.
ABEL & IMRAY,
Agents for the Applicant.