Improvements in Wheel Rims.
Year: 1893

page_text: Date of Application, 19th Sept., 1893 ·
Complete Specification Left, 19th July, 1894-Accepted, 25th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Wheel Rims.
I, ARTHUR COMINGS HIDE, of Ivy Villa, Harewood Road, Merton, in the
County of Surrey, Manager of Works, do hereby declare the nature of this
invention to be as follows:-
My invention relates to the construction of wheel rims and it is particularly
adapted to the construction of hollow rims for cycle wheels intended to carry
pneumatic tyres the covers of which have rigid edges, it having been found from
practice that the wedging action of the rigid elges of such covers due to the air
pressure within the tyre causes the edges of the rim to expand outwards.
The object of my invention is to prevent this outward expansion of the edges of
the rim and I obtain that end by corrugating the outer shell of the hollow rim
transversely.
The rim is preferably made out of two strips of metal, the one forming the outer
shell and the other the inner shell or lining. The outer shell may be corrugated
either when the strip of which it is made is in a flat straight length, or after the
said strip is shaped to form the outer shell. The corrugations may be produced
either by stamping or blocking or by rolling.
I sometimes also corrugate the inner shell or lining which also tends to prevent
the cover of the tyre from creeping on the rim.
This invention is applicable to every type of hollow rim and it may also with
advantage be applied to solid rims.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Wheel Rims.
1, ARTHUR COMINGS HIDE, of Ivy Villa, Harewood Road, Merton, in the
County of Surrey, Manager of Works, 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 :-
My invention relates to an improved construction of wheel rim for carrying
elastic tyres, and it consists in forming transverse corrugations in the rim which
die away as they approach the edges of the rim, the object being to increase the
strength of the rim and to reduce the weight thereof.
It has been found from practice that when deep rims are used for carrying
pneumatic tyres the covers of which are held to the wheel rim by means of their
rigid edges engaging with the inner sides thereof, that the wedging action of the
said edges due to the internal air pressure causes the edges of the rim to expand
outwards and so flatten the section of the rim, but by the construction of rim
bereinafter described this expanding or bulging out of the edges of the rims is
entirely overcome.
In the accompanying drawing which illustrates my invention, as carried out in
the construction of rims for cycle wheels:-
Figure 1 is a broken view partly in section of a solid-rim- embodying my
invention, and

page_text: Figures 2 and 3 are views in transverse section thereof on lines x, x, and y, yo
Figure 1 respectively.
Figure 4 is a view in transverse section showing the application of my invention
to a hollow rim.
Figures 5, 6 and 7 are views in transverse section showing the application of my
invention to special types of rims used for well-known constructions of pneumatic
tyres.
Throughout the views similar parts are marked with like letters of reference.
In carrying out my invention as applied to solid rims I take a strip of metal of
the required width and length, and generally speaking about half the thickness at
present used for solid rims and either before or after it is made up into a rim I
form in it by means of stamping, blocking or rolling a series of transverse
corrugations a, a etc. of any desired pitch and depth. These corrugations die away
as they approach the edges a', a' etc. of the rim so that the said edges are perfectly
straight and flat. As the metal of which these rims may be made is so much
thinner than that generally used I turn over or form beads on the edges of the rim
to prevent the tyre cutting thereon.
In carrying out my invention as applied to hollow rims, I prefer to form the rim
out of two parts in the well-known manner, in which case the part forming the
outer shell only is corrugated as shown by Figures 4, 5, 6 and 7, Figure 5
illustrating a rim made according to my invention of the section used with tyres
of the "Boothroyd" type, Figure illustrating a rim made according to my
invention of the section used with tyres of the "Seddon" and "Cooke" type, and
Figure 7 illustrating a rim made according to my invention of the section used
with the "Dunlop tyre.
I wish it to be particularly understood that I do not in any way claim any
particular construction of hollow or solid rim, those described and shown being
given merely by way of illustration as my invention is applicable to every type and
section of rim whether hollow or solid.
I am aware that rims have already been corrugated on the outer surface
adapted to receive the tyre for the purpose of preventing the tyre "creeping" on
the wheel rim and I do not therefore broadly claim rims having transverse
corrugations, but
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 :-
1. A solid wheel rim having a series of transverse corrugations each extending
up to but dying away at the edges of the rim so as to leave the said edges flat and
straight, as and for the purpose herein before set forth.
2. A hollow wheel rim having in that part forming its inner or convex face a
series of transverse corrugations extending to within a short distance of its edges,
as and for the purpose set forth.
3. A hollow rim having in its convex shell a series of transverse corrugations,
gradually dying away as they approach the edges of the rim, as and for the purpose
set forth.
4. As a new article of manufacture a wheel rim having transverse corruga-
tious a, a, etc. substantially as and for the purpose hereinbefore described and as
illustrated by the accompanying drawing.
Doted this 10th day of July 180.1
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.