Improvements in Metal Wheels for Tramcars, Corves, and the like.
Year: 1892

page_text: Date of Application, 19th Apr., 1892
Complete Specification Left, 16th Dec., 1892-Accepted, 4th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Metal Wheels for Tramcars, Corves, and the like.
I, WILMOT NORTH, 111 Cherry Street, Sheffield, Pattern Maker, do hereby
declare the nature of this invention to be as follows:-
--
The object of my invention is to make wheels in cast-steel, or other suitable
material; so designed as to make the several parts readily interchangeable, and
thereby enable any worn or damaged parts of such wheels to be taken off, and
replaced by new parts easily fixed to the useable portions with a minimum of
labour and expense in machining or fitting.
In carrying my invention into practice for say a steel tram-car wheel, I make
the wheel in two principal parts, .e., an outer rim or tyre, with or without flanges,
and having a number of internal projections formed therein; and also a central or
inner boss for fixing to the axle, springing or radiating from the said boss are a
number of arms or spokes, curved and interlaced together in a peculiar manner to
equalize contraction and to secure great strength and elasticity in use.
The outer
extremities of said arms are shaped to correspond to the internal projections of the
rim to which they are to be fastened or fixed by means of bolts nuts, wedges,
keys, or other locking devices corresponding thereto.
Dated this 18th day of April 1892.
WILMOT NORTH,
Per Isaac Beck,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Metal Wheels for Tramcars, Corves, and the like.
WILMOT NORTH, No. 111 Cherry Street, Sheffield, Pattern Maker, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:—
My invention relates to the class of metal wheels adapted to run upon rails or
metal tracks, and its object is to enable the parts of such wheels which usually
wear away most rapidly, to be easily removed and replaced by corresponding new
parts readily fixed to the useable portions.
And that my invention may be more readily understood, I will now refer to the
drawings hereunto annexed, wherein
Fig. 1. is a plan of the central or inner portion.
Fig. 2. plan of outer rim or tyre.
Fig. 3. edge elevations of arms forming part of inner portion, and illustrating
various modes of fastening.
Fig. 4. side elevation of an entire wheel, partly in section.
Fig. 5. plan of entire wheel.
Like letters refer to like parts in all the figures.
In carrying my invention into practice, for say a steel tramcar wheel, I make the
wheel in two principal parts. An inner or central boss a, for fixing to the axle,
springing or radiating from the said boss are a number of arms or spokes curved and
interlaced together in a peculiar manner, as shown in the drawing, to equalise con-
traction, and to secure great strength and elasticity in use. The outer extremities of
said arms are shaped to correspond to the internal projections provided in the rim ;
to which they are fastened by any of the forms of bolts, nuts, keys, wedges, or other
suitable locking devices.

page_text: I also make an outer rim or tyre b with or without external flanges, and chill the
outer face or tread when required. The inside being provided with projections c or e
against which the central portion is to be secured as before described by any
variety of the bolts, il. Thus making the wheel firm and secure for use, and at the
same time providing for an easy removal and exchange of parts whenever required.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is
1st. The formation of metal wheels for vehicles in two principal parts constructed
and secured together substantially as described and illustrated.
2nd. The peculiar curvature and joining together of the arms or spokes of the
central inner part of such wheels, substantially as described and illustrated.
Dated this 14th day of December 1892.
ISAAC BECK, R.P.A.,
Agent for the Applicant.