IMPROVEMENTS IN WHEELS FOR RAILWAY VEHICLES
Year: 1884

page_text: I WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co. Patent Agents
Southampton Buildings, London, in the County of Middlesex do hereby declare
the nature of said invention for "IMPROVEMENTS IN WHEELS FOR RAILWAY
VEHICLES " and in what manner the same is to be performed, to be particularly.
described and ascertained in and by the following statement :-
:
The present invention relates to wheels specially designed for railway vehicles,
in which the tire is secured to the periphery of the central plate by securely
locking these parts together, in the manner substantially as bereinafter set forth;
and the object of the invention is to obtain a reliable and strong union between
the tire and body of the wheel, and one which will permit of the ready removal
and renewal of the tire whenever desired.
The invention is illustrated in the accompanying drawing, in which Figure I'
is a central cross section of a wheel containing my improvement, and
Figure 2 is a view, in elevation, of the inner side or face of the same.
In the drawing, T represents the tiro of the wheel which is provided with an
annular web, w, projecting towards the centre of the wheel, such web being
provided with a laterally projecting annular tongue t preferably located near its
periphery. The inner edge of the tire is also provided with an annular tongue.or
projection a and an annular groove g.
i
P represents the central plate, and H the hub of the wheel, which preferably.
form a single piece or casting, and may be forged from wrought iron or cast from
iron or steel. The plate P, near its periphery, is provided with a tongue and
groove to correspond with the tongue a and groove g upon the inner edge of the.
tire, and it is also provided upon its outer face with a groove b, to correspond with
the tongue t upon the web of the tire. The web w is preferably located nearer
the outer than the inner edge of the tire so as to leave a wide bearing for the tire.
upon the periphery of the central plate, and the outer face of the central plate,
opposite the web, is preferably recessed to receive the web. The recess may,
however, be dispensed with and the web may simply overlap the periphery of the
central plate, and then, by locating the web nearer the outer edge of the tire, a
broader bearing of the tire upon the periphery of the central plate may be
obtained.
It will be understood that the parts described are to be of such relative
proportions that when the tire and central plate are brought together, the tongue t
on the web will enter, and fit iuto, the groove b in the central plate, and the

page_text: tongue and groove upon the inner edge of the tire will engage with the corre-
sponding tongue and groove of the central plate at its periphery, forming two
tongue and groove locks, while the periphery of the central plate and the inner
face of the tire are in contact from the web to the inner edge of the tire, as fully
shown in the drawing.
It is obvious that in place of the lock formed upon the web of the tire and the
central plate as hereinbefore described and shown in the drawing, an equivalent
lock might be formed by a tongue projecting laterally from the face of the central
plate and entered into a groove in the web of the tire.
After the tire and the central plate have been brought together as above
described, they are firmly united by a series of bolts & passed through the web w
and the plate P near its periphery. To compensate for the weakening of the
plate at this part by the bolt-holes, as well as to give it additional strength to
resist the blows communicated through the tire, a series of bosses or reinforcements e,
equal in number to the bolts, may be formned upon the inner face of the plate P
through which the holes are bored; or the same result may be obtained by
thickening the metal of the plate near the tire, and boring the bolt-holes
through such thickened part. Instead of bolts d a series of rivets may be used
to unite the tire and the central plate.
The construction of the tire and that of the body of the wheel are so related to
each other that the tire can be forc d into place upon the periphery of the central
plate by hydraulic or other requisite pressure, the corresponding tongues and
grooves in each part being so located and constructed to make close joints.
From the above description it is readily seen that a new tire can be easily and
quickly substituted for a broken or worn one, by simply removing the bolts or
rivets, forcing the old tire off. and a new one on, and replacing the bolts.
If desired, the lock upon the inner edge of the tire and central plate may be
omitted and the periphery of the central plate be simply extended out flush, or
nearly so, with the inner edge of the tire; in such construction the lock upon the
web of the tire and the face of the central plate will greatly lessen the liability
and danger that the bolts or rivets would be sheared or cut off between the web
and the central plate in case the tire should become broken. But I prefer to
double lock the tire to the central plates as shown in the drawing.
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 :-
First. A wheel for railway vehicles composed of a hub, a single central plate, and
a tire provided with an inwardly projecting weh, in which the tire and the
central plate are secured together by two tongue and groove locks, one formed
upon the web and the outer face of the central plate and the other upon the
central plate and the inner edge of the tire, and by bolts passed through the
central plate and the web of the tire.
Second. A wheel for railway vehicles composed of a hub, a single central plate
and a tire provided with an inwardly projecting web, in which the tire is secured
to the central plate by a tongue and groove lock formed upon the web of the tire
and outer face of the central plate and by bolts passed through the central plate
and the web of the tire.
T
T 1
100
HASELTINE, LAKE & Co.,
For the Applicant.