Year: 1894

page_text: Date of Application, 5th Dec., 1894-Accepted, 5th Jan., 1895
JOHN ERNEST WALLIS, Erdesley, Basingstoke, Hants Engineer and WALLIS
& STEEVENS LIMITED North Hants Iron Works, Basingstoke, Hants, 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:-
Tramway trucks designed to tip on trunnions are usually made with a flat frame
to which supports are attached at, or near the ends to carry the trunnions, or
trunnion bearings. Our present invention provides for the bed of the truck to be
bent up so as to form the end support and to do away with the separate frame
ends, or standards. The bed and ends may be made of any section steel, or iron,
but preferably a channel section and this is how it is shown on the accompanying
drawings.
Fig. 1 shows the truck in side elevation. Fig. 2 the same in end elevation.
Fig. 3 a part plan of one end of the frame.
A. is the body either made in the improved manner as hereafter described, or of
any desired shape suitable for the purpose of tip trucks tipping on trunnions.
B. are the trunnions, shown in the drawings as two, but may be as many as desired,
either made in the improved manner as hereafter described, or in the ordinary
form. C. are the trunnion bearings designed to suit the trunnions used. D. is the
frame turned up to form the end, or standard. E. the wheels and axles and
F. the bearings, either made in the improved manner hereafter described, or in the
ordinary form. Figs. 1. 2. and 3. will sufficiently show the improved frame and ends
where the channel iron, or steel forming the sides of the frame are turned round
and up so as to form the ends and supports for carrying the trunnion bearings.
The frame can be made in one piece, but for ease of manufacture we prefer it
made in two halves as shown on the accompanying drawings where they may be
fixed together by the bolts, or rivets attaching the trunnion carriers at C. and the
buffer plate at G. In the drawings the turned up ends of the frame are shown set
back so that the end of the frame may form the buffer and keep the truck bodies
clear of each other when turning sharp curves. This is preferably fitted with the
plate shown on the drawings at G which is bolted, or rivetted to both sides of the
frame, both holding these firmly together and forming the buffer end. The shape
of the turned up portion is immaterial, but we prefer it set back.
Tramway trucks when exported require to be packed in as compact a form as
possible so that for shipping purposes the lowest freight can be obtained. Tramway
trucks as now made are expensive for shipment owing to the size of the truck
bodies in proportion to their weight. To enable the bodies to be packed in the
smallest space possible our present invention provides for making the truck bodies
tapered both on their sides and ends, and in cases where the bodies tip on trunnions
we make these trunnions removable, thus when being packed the one body slips
inside another and as many as desired can be thus nested within each other. For
more clearly showing this we have shown a number of bodies thus nested in end
elevation at Fig. 4 of the accompanying drawings.
In tramway trucks which tip on trunnions the weight of the truck when level
usually rests on the trunnions alone, or is held on a central point by a fastening.
Our present invention provides that when the truck is in its level, or untipped
position, the weight is carried on a saddle, or part introduced between the trunnion

page_text: bearings for this purpose. The exact form of this saddle is immaterial, but we
prefer the shape as shown at Figs. 5 and 6. This is a piece of angle iron, or
steel bent to the requisite shape and which is attached to the turned up end of the
frame by bolts, or rivets as shown at C. on Fig. 2. Attached to the ends of the
truck body are saddles made to correspond with those attached to the frame so that
the weight of the truck is carried on these when in a level position as shown at B.
on Fig. 2. The trunnions need not of necessity form part of the saddle, but might
be separate, but we prefer to make them as shown at Figs. 7. & 8. In this an iron,
or steel angle is bent to the requisite shape and a portion of one web being cut off,
this is turned over to form the trunnion thus making the saddle and trunnious in
one piece. The other web of the angle is attached to the truck body and carried
out some length to form a strengthening piece to the end of the truck body.
The open axle bearings of tramway trucks wear out very fast and the cost of
renewing is considerable. To remedy this, this present invention provides for
the bearing bracket being provided with a loose facing, or liner of steel, or other
suitable material, which can be readily taken out and replaced. This liner is fitted
into the bearing bracket and forms the upper bearing surface of the wheel axle, the
lower half being open, but the axle prevented from coming out by a strap passing
below it and held in place as shown on Figs. 9. & 10. of the accompanying
drawings. Referring to Figs. 9. & 10. a. is the bearing bracket made of cast
iron, steel, or other suitable material. is the liner made of steel, or other suitable
material. This is made preferably with a part flange on both sides both to retain
the liner in place sideways and also so that when one flange becomes worn by the
friction against the wheel boss the bearing can be reversed. c. is the axle strap,
which is made to clip over the bracket and being shouldered under the liner on
both sides holds this in its place as well as forming the strap to keep the axle d. in
position. The whole is held together and attached to the frame of the truck by
bolts at e.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
First. The construction of a frame, or carriage for tramway trucks, in which the
frame is carried out and turned up so as to form the end supports for carrying the
truck body, trunnions, or trunnion bearings substantially as described.
Second. The construction of the bodies of tramway trucks with both sides and
ends tapering and having removable trunnions so that they nest inside each other
for packing for export substantially as described.
Third. The construction of trunnions and trunnion bearings for tipping in
combination with a saddle for taking the weight when the truck body is in a level
position substantially as described.
Fourth. The construction of a bearing for tramway trucks with a loose liner, or
bearing surface held in place by the axle strap substantially as described.
Dated this Fourth day of December 1894.
JOHN ERNEST WALLIS.
For WALLIS & STEEVENS, LIMITED,
JOHN ERNEST WALLIS,
Secretary.
JOHN ERNEST WALLIS.
For WALLIS & STEEVENS, LIMITED,
JOHN ERNEST WALLIS,
Secretary.