Car Trucks.
Year: 1898

page_text: Date of Application, 24th May, 1898-Accepted, 3rd Sept., 1898
Car Trucks.
I, WILLIAM SIMPKIN, of the Hotel Surbide, City of Mexico, Mexico, Mechanical
Engineer, do hereby declare the nature of my invention for improvements in car
trucks, 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 improvements in car trucks, and it consists in the novel
combination and arrangement of parts as will be hereinafter more fully described
and pointed out in the claims.
Fig. I is a side elevation of my improved truck, with parts shown in vertical
section taken on line I-I, Fig. II.
Fig. II is a top view of the truck.
Fig. III is a vertical transverse section taken on the line III-III, Fig. II,
the axles and wheels being shown in elevation.
Fig. IV is a top or plan view showing a varied form of auxiliary truck frame.
Fig. V is a longitudinal vertical sectional view taken on the line V-V, Fig. IV.
Fig. VI is a detail top view of one of the guides used in the form of truck shown
in Figs. IV and V to control the endwise movement of the auxiliary truck frame.
The object of my invention is to construct a car truck in such a manner that
all friction previously imparted by the load on the ordinary fast running axles
of the rail wheels is entirely overcome, by removing the weight of the load from
the axle boxes which receive the ends of the said axles, in which instance the said
boxes and ordinary truck frame carrying them serve only to hold the car axles
and retain the wheels in their proper position upon the rails.
Briefly stated, the invention consists in an ordinary truck proper baving the
usual rail wheels, axles and axle bearings, an auxiliary frame carried by the
truck proper, shafts on which said auxiliary frame is supported, bearings for said
shafts, wheels on said shafts resting upon and in rolling contact with the said axles,
or in contact with the hubs, or extensions forming part of the rail wheels, said
auxiliary frame forming a load carrying frame and preferably being mounted
upon suitable springs interposed between it and said shaft bearings, for the pur-
pose of allowing the said auxiliary frame to yield when a load is applied thereto.
Referring to the drawings, 1 designates an ordinary truck frame proper, 2 the
rail wheels, 3 the axles by which said wheels are carried, and 4 the axle bearings.
These parts may all be of common construction as no invention is herein claimed
for them, per se.
Within the frame 1, and secured to or formed with the opposite ends of the same
are two beams 5 extending preferably parallel with one another and with the
opposing sides of the said frame. The beams 5 are provided with pockets 6 that
receive bearing blocks 7.
8 designates shafts located above and arranged parallel with the axles 3 to the.
ends of which shafts wheels 9 are attached, said wheels being arranged to rest
upon and in rolling contact with said axles or with collars 10 formed with or
mounted on the said axles. Or instead of bearing upon the axles or collars thereon,
the wheels 9 may bear upon the hubs of the main or rail wheels or any suitable
extensions thereon.

page_text: 11 designates an auxiliary frame supported by the shafts 8. This auxiliary
frame is held in position by posts projecting from the truck frame proper and pass-
ing loosely through suitable openings formed in said frame 11, a key or other
fastening device 13, being passed through the end of said posts to secure the
parts together. Interposed between the auxiliary frame 11, and the bearing
blocks 7, are springs 14, which together with the ordinary axle bearing springs 15,
co-operating with the bearings 4, form a more yielding and durable truck than any
heretofore constructed.
16 designates the bolster beam carried by the auxiliary: frame 11.
In Figs. IV to VI inclusive I have shown a varied form of auxiliary truck frame.
This construction of frame is especially designed for use with electric motor cars
such as at present in vogue, in which the motors and their gearing occupy con-
siderable space beneath the car body. With cars so equipped it is necessary to so
arrange the auxiliary frame that the space beneath the car body will accommo-
date the presence of both the auxiliary frame and the motor and gearing.
The truck frame proper is designated by 1" and the rail wheels and axles by,
respectively 2 and 3".
5 are beams arranged in parallel pairs and suitably secured together at their
central portions. The ends of these beams extend upwardly from their central
portions and they are notched on the lower sides to receive shafts 8 that carry
wheels 9. The shafts 8" only extend across the ends of the individual pairs of
beams and not from side to side of the truck and the wheels 9 are mounted between
the beams of each pair, and revolve on the rail wheel axles in the same manner as
that described regarding Figs. I to III.
The beams 5ª are prevented from endwise movement by guides 17 carried by
the beams and having their ends seated between uprights 18 fastened to the truck
frame proper (see Figs. V and VI). The outer free ends of the guides are loosely
seated between the uprights 18 (see Fig. VI) and are permitted to play vertically
therein, but any lateral play is prevented.
19 designates posts secured to the beams 5. 20 are cross bars loosely fitted to
said posts and supported on springs 14*. The bolster 16* is supported by the
cross-bars 19.
From the foregoing description it will be seen that the entire weight of the
load is entirely removed from the fast running axle bearings where the friction
has always been the greatest, the load or weight being imparted on the shaft 8, which
by reason of the employment of the comparatively large wheels 9 and their co-
operation with the axles 3, or the hubs or extensions of the rail wheels, said shafts 8
rotate comparatively slowly, and consequently the friction is reduced to a minimum.
Thus it will be seen that the annoyance and trouble experienced with what is
commonly known as hot boxes" is entirely obviated, and the bearings in con-
sequence of the reduced friction will last an indefinite length of time.
"
I do not limit myself to the location of the wheels or disks as they may be
arranged in rolling contact at any position along the axle of the rail wheels, and
further as stated before, the collars may be entirely dispensed with, and the disks
co-operate or rest directly upon the axles, or a hub or extension formed with or
secured to the rail wheels on either side thereof, it being evident that the invention
is susceptible of various changes in the construction without departing. from the
nature of the same.
It will be readily seen that my invention can be applied to any truck now in
use, and that the additional parts comprising my invention may be applied with
very little trouble and at a reasonable expense.
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:——
1. In a car truck, the combination with the truck proper and rolling parts
thereof; of a frame carried by said truck; and means on which said frame is sup-

page_text: ported, said means being arranged to roll in contact with said truck rolling parts,
substantially as and for the purpose set forth.
2. In a car truck, the combination with the truck proper and rolling parts
thereof; of a frame carried by said truck; means on which said frame is supported,
said means being arranged to roll in contact with said truck rolling parts; and
springs located between said frame and said supporting means; substantially as
and for the purpose set forth.
3. In a car truck, the combination with the truck proper and rolling parts
thereof; of a frame carried by said truck; shafts on which said frame is supported;
and wheels carried by said shafts arranged to bear upon and revolve with said
truck rolling parts, substantially as described.
4. In a car truck, the combination with the truck proper and rolling parts
thereof; of a frame carried by said truck, and wheels by which said frame is sup-
ported, said wheels being arranged to bear upon said truck rolling parts and being
of greater circumference than the portions of said rolling parts against which they
bear, substantially as described.
5. In a car truck, the combination with the truck proper and rolling parts
thereof; of a frame carried by said truck; shafts on which said frame is supported;
and wheels on said shafts arranged to bear upon and revolve with said truck roll-
ing parts, said wheels being of greater circumference than the portions of said
rolling parts against which they bear, substantially as described.
6. In a
car truck, the combination with the truck proper and rolling parts
thereof; of a frame carried by said truck; shafts on which said frame is sup-
ported; wheels on said shafts arranged to bear upon said truck rolling parts;
and springs located between said shafts and said frame; substantially as described.
7. In a car truck, the combination with the truck proper and its ground wheels
and axles; of a frame carried by said truck; shafts on which said frame is sup-
ported; and wheels on said shaft arranged to bear upon said axles; substantially
as described.
8. In a car truck, the combination of the truck frame proper, the axles and
wheels thereof, a supplemental frame mounted above said truck frame, axles on
which said supplemental frame is supported, bearing boxes in said supplemental
frame for the axles on which it is supported, springs interposed between said
bearing boxes and said frame, and wheels on said supplemental frame supporting
axles adapted to bear upon and roll in contact with said axles of the truck proper,
substantially as and for the purpose set forth.
T
05. 1 1
&M 1900
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants Patent Agents.