AN IMPROVED CONSTRUCTION OF WHEELS FOR VEHICLES to be as follows:-
Year: 1885

page_text: I FREDERICK BIRD of 11 Great Castle Street Regent Street Engineer do hereby
declare the nature of the said invention for "AN IMPROVED CONSTRUCTION OF
WHEELS FOR VEHICLES to be as follows:-
"
My Invention relates to an improvement in the wheels of carriages and other
common road vehicles and the invention has for its object to reduce the cost and
lighten the construction of the wheel and the invention consists in dispensing with
the wooden rim and securing directly to the spokes a rim of channel iron carrying
an indiarubber tire.
The rim of channel iron section is shrunk directly around the spokes to the ends
of which it is screwed or otherwise secured. The india rubber tire is preferably
constructed as described with reference to bath chair wheels in the Specification
of a former patent granted to me dated May 19th 1884 N° 7935, the hard rubber
portion of the tire being received between the Hanges of the channel iron rim and
bolted to said rim at intervals.

page_text: I FREDERICK BIRD of 11 Great Castle Street, Regent Street, Engineer, 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 improvement in india-rubber tyred wheels for
carriages and other light common road vehicles, including Bath Chairs but not
bicycles and tricycles.
In the construction of such wheels it has heretofore been usual to shrink an iron
tyre upon the ordinary wooden rim for the purpose of binding together the felloes
of the rim and carrying the india-rubber tyre and my Invention has for its object
to reduce the cost and lighten the construction of the wheel by dispensing
altogether with the wooden rin and securing the rim of channel iron carrying the
india-rubber tyre directly to the spokes.
Reference is to be had to the accompanying drawings forming part of this
specification wherein,
Figure 1 represents a cross section of the channel iron rim and india-rubber tyre
showing the method of uniting the latter to the former.
Figure 2 is a cross section of the same at one of the spokes, showing the method
of securing the channel iron rim to the spokes.
Figure 3. is a cross section and side view of the channel iron rim showing the
method of jointing it.
The same letters of reference indicate the same parts in all the Figures.
8
a is the channel iron rim rolled of the section shown, b b¹ is the india-rubber
tyre, and c is a spoke. The india-rubber tyre is preferably manufactured as
described with reference to Bath Chair wheels in the specification of a former
Patent granted to me and dated May 19th 1884. N° 7935. that is to say, the tyre is
composed of an outer wearing portion b of soft vulcanized rubber and a backing
of hard vulcanized rubber 61, the two portions being vulcanized together as
described in my former Patent. The hard rubber portion of the tyre is received
between the flanges of the channel iron rim a and bolted to said rim at intervals,
between the spokes by screw bolts and nuts f, the bolts e, being driven through
punctures in the soft-rubber portion b until their heads are completely buried
therein and take a firm bearing upon the bard rubber backing b¹; the bolts passing
through holes drilled in the channel iron rim and the nuts f, being flat discs
received in countersunk recesses in the inner surface of the rim a. The ends of
the rubber tyre are butt jointed and secured to the channel iron rim by bolts.
close to the joint. The chanuel iron rim has holes punched in it at intervals
corresponding to the angular distance of the spokes apart, to receive tenons formed
on the ends of the spokes as shown at g; in Figure 2, the tenon g corresponding in
length to the thickness of the middle portion or web of the channel iron rim, and
fitted tight into the hole by a wedge key h driven into the spoke. The ends of the
channel iron rim a butt together and are united by a covering or fish-plate a' on

page_text: the inner side as shown, secured by rivets through the middle portion or web of
the channel iron rim a, this joint being made after the rim has been bent to the
circular form and applied upon the tenons of the spokes. The channel iron rim
may be in one length and have but one joint or in two or more lengths similarly
united.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
An india rubber tyred wheel for carriages and other light common road vehicles
of the kind herein referred to, of which the rim is constructed of channelled iron
attached directly to the spokes without the intervention of any wooden felloe, the
india rubber tyre being secured to the channelled iron rim substantially as herein
described and shown in the drawings.