Improvements in the Rims of Wheels for Cycles and other Vehicles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Rims of Wheels for Cycles and other Vehicles.
I, ALEXANDER ROBERI BUNTING, of County Steel Works, in the City of Sheffield,
Steel Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved manufacture of steel rims for wheels to
be fitted with pneumatic or elastic tyres, my principal objects are to greatly
increase the strength or resistance to change of form of such rims without materially
increasing their weight and by making the rim out of one single strip of steel to
simplify manufacture while at the same time producing a more reliable article
at a reduced cost.
In carrying out my invention to produce a rim suitable for say a bicycle wheel,
I proceed as follows:-I prefer to take a plain strip of steel of suitable length
and join the ends of the same by brazing welding or other reliable means thereby
forming an endless hoop of uniform section or thickness, this hoop I next pass
between or through a succession or series of rolls varying in shape on their
periphery's all suitably mounted and driven, with or without guides, to gradually
shape the flat hoops into a trough shaped rim having both its edges turned over
and practically forming a couple of tubes of circular scroll shape, said edges being
forced beyond the form of single circles thereby doubling the thickness of metal
at the junction of the tubular formation with the trough shaped rim, thereby
ensuring great rigidity and also obviating the necessity for soldering brazing or
other process for obtaining the so called solidity now generally resorted to.
ISAAC BECK, F.S.P.A.,
Haymarket Chambers, 17 Haymarket, Sheffield,
Agent for the Applicant.
Improvements in the Rims of Wheels for Cycles and other Vehicles.
I, ALEXANDER ROBERT BUNTING, of County Steel Works, in the City of Sheffield,
Steel Manufacturer, 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 steel rims for wheels to
be fitted with pneumatic or elastic tyres, my principal objects are to greatly
increase the strength or resistance to change of form in such rims without materially
[Price 8d1

page_text: increasing their weight, also by making the rim out of one single strip of steel to
simplify manufacture while at the same time. producing a more reliable article
at a reduced cost.
In carrying out my invention to produce a rim suitable for say a bicycle wheel,
instead of following the prevalent practice of shaping the strip of steel before
bending or closing, I prefer to take a plain strip of flat steel of suitable length
joined at the ends by any known reliable means thereby forming an endless
hoop of uniform section or thickness and pass the said hoop through a series of
rolls varying in shape on their peripheries all suitably mounted and driven as is
well understood and thereby gradually shape the flat hoop into a trough-shaped
rim having both its edges turned over inward practically forming a couple of
scroll shape tubes. I force the inner edge of the strip considerably beyond the
point at which it would form a circle so as to actually double in close contact
the thickness of the metal at the inner side of the tube on the outer portion or
part of the rim thereby obtain greater rigidity and also obviate the necessity for
soldering brazing or other process now resorted to for securing the tubular
formation to the rim.
The Drawing annexed illustrates a section of a rim having my improved scroll
shape tubes forming part of a rim suitable for a cycle and for fitting with a
pneumatic tyre. The central portion of the rim may be varied in shape or
configuration as may be required without departing from the spirit of my
invention.
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:-
-
1. The method of increasing the rigidity of a wheel rim formed out of a single
hoop or strip of steel into a trough shaped rim having scroll shape tubular
pro-
jections on each edge, a considerable portion of said scrolls being composed of
two thicknesses of metal in close contact, substantially as and for the purposes
herein described.
Dated this 2nd day of a
1007
ISAAC BECK, F.S.P.A.,
Haymarket Chambers, 17 Haymarket, Sheffield.
Agent for the Applicant.