Improvements in the Construction of Metallic Rims, chiefly applicable to Metal Wheels for Cycles and for other Carriages.
Year: 1891

page_text: Date of Application, 12th Jan., 1891
Complete Specification Left, 21st May, 1891-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Metallic Rims, chiefly
applicable to Metal Wheels for Cycles and for other Carriages.
We, WILLIAM PILKINGTON, CHARLES THOMAS BISHOP and ANDERSON
BROWNSWORD trading as The Birmingham Climax Steel Tube Company,
Catherine Street Aston, do hereby declare the nature of our said invention to
be as follows:-
Our invention relates to improvements in the construction of metallic rims or
felloes for metallic wheels of cycles chiefly, but also applicable to other wheels for
carriages.
We will describe our invention as applied to its most obvious use and that is as a
rim to receive elastic or cushioned tyres, but can be used also for other tyres of
this class.
We form or configurate our rims from sheet metal of that character usually
employed for this purpose by means of rolls for rolling or dies for drawing
separate or combined.
Our form of rim cross-section according to our invention, shews by bending
from one side a segment of a circle (this is to receive the elastic tyre) then
bending or doubling down to form the one side, and then upward forming the other
side (making a chamber of a required configuration) and over the edge of the
segment above described and fitting upon about one fourth of its surface, the edge
being turned or is doubled under so that each edge by this method is non-cutting
to the tyre the spokes of the ordinary kind pass through the chamber and are
secured to the segment of the circle for tyre in the usual manner.
In some cases we may make the lower part of the chamber only of an increased
strength and the part above set forth instead of occupying one fourth of the
segment may extend a distance above the centre so that the spokes in passing
through these parts will gain great strength and rigidity.
Or by another mode we form a chambered rim of a required configuration by
bending up equally the two sides then doubling each edge down inwardly forming
a segment of a circle to receive the clastic tyre, each edge is connected to the
other by overlapping and underlapping and the spokes are passed through this and
the lower part of chamber and secured in the usual manner. A rim thus constructed
withstands a great strain, and the edges will not separate.
Dated 12th January 1891.
THOS. KENDRICK,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in the Construction of Metallic Rims, chiefly
applicable to Metal Wheels for Cycles and for other Carriages.
We, WILLIAM PILKINGTON, CHARLES THOMAS BISHOP and ANDERSON
BROWNSWORD, trading as The Birmingham Climax Steel Tube Company,
Catherine Street, Aston, do hereby declare the nature of our said invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
Our invention relates to improvements in the construction of metallic rims or
felloes for metallic wheels of cycles chiefly, but also applicable to other wheels for

page_text: We will describe our invention as applied to its most obvious use that is as a
rim to receive elastic or cushioned tyres, but can be used also for other tyres of
this class.
We form or configurate our rims from sheet metal of that character usually
employed for this purpose by means of rolls for rolling or dies for drawing,
separate or combined.
One form of rim cross section according to our invention shews from bending
from one side a segment of a circle this to receive the elastic tyre, then bending or
doubling down to form the one side, and then upward forming the other side
making a chamber of a required configuration, and over the edge of the segment
above described and fitting upon about one fourth of its surface, the edge being
turned or doubled under so that each edge by this method is non cutting to the
tyre, the spokes of the ordinary kind pass through the chamber and are secured to
the segment of the circle for tyre in the usual manner.
In some cases we may make the lower part of the chamber only of an increased
strength and the part above set forth instead of occupying one fourth of the
segment may extend a distance above the centre so that the spokes in passing
through these parts will gain great strength and rigidity.
Or by another mode we form a chambered rim of a required configuration by
bending up equally the two sides then doubling each edge down inwardly forming a
segment of a circle to receive the elastic tyre, each edge is connected to the other
by overlapping and underlapping, and the spokes are passed through this and the
lower part of the chamber and secured in the usual manuer.
A rim thus constructed withstands a great strain and the edges will not
separate.
And in order that this our said invention may be more clearly understood we will
now proceed to describe the same reference being made to the sheet of drawings,
to the various figures and letters marked thereon (that is to say)-
Figures 1. 2. 3. 4 are views in cross section of metallic rims constructed according
to our invention applicable chiefly to the wheels of cycles, but also to other
carriages, A, B, C, are their respective diagrams.
The same letters of reference indicate like or corresponding parts upon the
several figures.
In Fig. 1, a the bend from the one side forms b, which is to receive the elastic
tyre, then bending downwards as c, one side is thus formed, and then upward as d,
forming the other side, and thus the chamber e, the terminal edge from b, is turned
or bent down as g, and the terminal edge of d is bent over g, and doubled under
as forming an inseparable four line interlocking arrangement of the edges;
thus b, presents an uninterrupted surface, and the edges are noncutting to the
tyre.
In Figs. 3 and 4 we bend from a, equally, forming the side c, and d, then
doubling down at a' a', inwardly thus form b, which is to receive the tyre, e, is the
chamber, as Fig. 1, the terminal edges are bent and engaged as above set forth in
Fig. 1, but central and shewn at g, and h, forming an inseparable four line inter-
locking arrangement of the edges with an even or uninterrupted surface to b and
noncutting edges to the tyre.
Fig. 4 differs only to Figs. 1 and 3, by each edge having an extra lap, or bend
thus forming a stronger and inseparable six line interlocking arrangement of the
edges g.
In Fig. 2 we shew a thickened bottom which may be constructed with Fig. 1, by
rolling or drawing before the bending or configuration of the rim is commenced,
provided in case the bottom as shewn is found by practice not strong enough to
receive and retain the spokes, or even to avoid such strain as to produce buckling.
In Figures 3 and 4 the spokes preferably pass not only through the bottom but
through the folded joints so that the thickened bottom may not be required.
Metallic rims thus constructed bend with greater facility and are more reliable.
Having given a general description of our invention and the manner in which

page_text: the same may be practically carried into effect, nevertheless we wish to observe in
conclusion that we may alter or modify the same without departing essentially
from the principle of our said invention.
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
The general construction of chambered metallic rims for receiving elastic or
cushioned tyres for metallic wheels of cycles, or other wheels, for other carriages,
the said rims being formed from sheet metal, and their terminal edges secured
together, and arranged at either side as Fig. 1 or central as Figs. 3 and 4
substantially as and for the purposes herein before described, and set forth in the
foregoing Specification and shewn on the accompanying sheet of drawings.
Dated 21st May 1891
THOS. KENDRICK,
Agent for Applicants.