IMPROVEMENTS IN WHEELS FOR RAILWAY HAND TRUCKS OR TROLLIES AND SIMILAR APPARATUS
Year: 1884

page_text: We JAMES BURBRIDGE of the firm of Messrs W. Warnè & Co of the India Rubber
Works, Tottenham in. the County of Middlesex India Rubber Manufacturer and
THOMAS OAKLEY, Engineer also of Tottenham aforesaid do hereby declare the
nature of our invention for "IMPROVEMENTS IN WHEELS FOR RAILWAY HAND
TRUCKS OR TROLLIES AND SIMILAR APPARATUS," and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement:-
It has been very general hitherto to provide the wheels of railway hand trucks.
or trollies and similar apparatus with india rubber tyres with a view to reduce the
noise caused by the running of such trucks or trollies over the station platforms.
These tyres are vulcanized on the wheel and when worn out it is necessary to
send the wheels to the india rubber factory to have the tyres replaced. Unless
there are a large number of tyres to be replaced, this is an expensive mode of
procedure and there are many other objections to this course, which will be evident
to any one acquainted with the subject.
Now the object of the present invention is to construct the wheels and tyres for
railway hand trucks and similar apparatus in such a manner that the repairs,
when required, may be readily effected by an ordinary mechanic without sending
the wheels to the factory.
In carrying out this invention as applied to cast metal wheels we form in the
felloe or rim of the wheel a rebate the back of which is under-cut like a dovetail.
Into this rebate is fitted the rubber tyre, and it is held in position by a ring which
fits into a plain rebate formed in the rubber tyre, and is bolted or rivetted to the
rim or felloe of the wheel, or to any other convenient part..
The rubber tyre we form of hard and soft rubber, the running surface is soft,
and that part which fits into the rebate in the metal felloe is hard rubber.
These tyres are moulded to the proper form and are vulcanized in the ordinary
way.
When repairs are required to be done it will only be necessary to remove the
bolts or rivets, withdraw the ring, and the old rubber tyre will slip readily off the
wheel. A new tyre is then put in its place and the ring is again bolted or
rivetted to the wheel.

page_text: When wood wheels are employed we prefer to shrink on or otherwise secure to
the ordinary iron tyre or to the wheel a rebated tyre as above described into
which we insert the rubber tyre and secure one or both to the wheel by bolts or
rivets as before explained or in any other convenient manner.
In the accompanying drawing we have shown at Fig: 1 in front elevation a cast
iron trolley wheel constructed according to our invention Fig: 2 being a vertical
section of the same taken on the line X X Fig: 1.
A is the cast iron wheel the rim of which is formed with a rebate. The back of
this rebate is under-cut as shown at a to receive the correspondingly formed
portion of a rubber tyre B. B is the hard rubber base of this tyre and B¹ the soft
rubber running part. The hard rubber base is moulded with a half dovetail
portion or a half-dovetail shaped rebate b on one side, which will interlock with
the rebated rim, and with a plain rebate b¹ on the other side into which fits a
ring C. This ring when bolted or rivetted to the wheel A by means of the screw
bolts or rivets c will firmly secure the rubber tyre in place as shewn at Fig: 2.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is :-
In a wheel for railway hand trucks, trollies and similar apparatus the combi-
nation of a rubber tyre composed of a rebated hard rubber base B and soft rubber
running portion B¹ with a rebated metal rim or tyre and a gripping or holding
ring C which is secured to the wheel by screw bolts or rivets all substantially as
and for the purpose set forth.
Din and day of October 1884