Improvements in and connected with Elastic Wheel-tyres.
Year: 1897

page_text: Date of Application, 30th June, 1897
Complete Specification Left, 26th Mar., 1898-Accepted, 7th May, 1898
PROVISIONAL SPECIFICATION.
Improvements in and connected with Elastic Wheel-tyres.
I, JAMES SHEPHERD, of Shird Fold, Davenport, in the County of Chester,
Engineer, do hereby declare the nature of this invention to be as follows:
This invention relates to the construction. of an improved elastic wheel-tyre.
In carrying out my invention I employ a split tubular hoop of steel or other
metal an elastic cover, and means for connecting the tyre to a wheel rim as herein-
after more particularly described.
My split hoop is formed of a metal tube bent into a circle to fit the wheel rim
the ends butting but not being otherwise joined (or the hoop may be in halves)
the hoop thus formed being then cut away on the inner circumference to form a
circumferential slot.
The cover which is of any suitable elastic material has its edges flanged or
turned up for the purpose hereinafter described, the tread portion of the cover
being thickened. This cover is stretched over my split tubular hoop the flanged or
projecting edges of the same engaging with the edges of the slot in the said hoop.
To apply the tyre thus constructed it is expanded and passed into the channel
of the rim and in order to fix the same securely thereto a series of T-bolts is
used the heads of which are passed through slots in the rim and then turned to a
position transverse to the rim. The said bolts are then tightened by their nuts
so as to clip the cover between the outer surface of the tube and the inner surface of
the rim.
"
シュ
1007
Improvements in and connected with Elastic Wheel-tyres.
I, JAMES SHEPHERD, of Shird Fold, Davenport, in the County of Chester,
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:-
-
This invention relates to the construction of an improved elastic wheel-tyre.
In carrying out my invention I employ a split tubular hoop of steel or other
metal, an elastic cover, and means for connecting the tyre to a wheel rim as herein-
after more particularly described.
My split hoop is formed of a metal tube bent into a circle to fit the wheel rim
PQ77

page_text: the ends butting but not being joined and having on the inner circumference a
circumferential slot.
The cover which is of any suitable elastic material has its edges Banged or
turned up for the purpose hereinafter described, the tread portion of the cover
being thickened. This cover is stretched over my split tubular hoop, the flanged or
projecting edges of the same engaging with the edges of the slot in the said hoop.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which:-
Figure 1 is a section of a cycle wheel having my improved tyre applied; and,
Figure 2 is a section of the split tubular hoop detached: "
Figure 3 is a sectional view illustrating the application of my invention to a
wheel having a wood felloe.
Similar letters of reference indicate corresponding parts in all the figures.
a is the wheel rim, is the split tubular hoop having the circumferential slot c
on its inner periphery and d is the cover or elastic portion of the tyre adapted to
embrace the tube b and having at its edges the flanges e, e which engage with the
edges of the hoop formed by the slot c and serve to hold the cover upon the hoop.
The diameter of the hoop 6 is so proportioned to the diameter of the rim a and
thickness of the portions of the cover d adjacent to the said rim that when the
tyre is placed in position the two sides of the cover will be clamped between the
hoop and the rim.
As herein before stated the hoop is split and the cover d is made of elastic
material so as to permit of the tyre being stretched to the desired extent for placing
it upon the rim a. Instead of making the hoop 6 of one piece it may be made in
two or more sections.
The cover itself is preferably made considerably thicker upon the tread portion
thereof than upon the other portions and in order to increase the elasticity of the
tyre the hoop 6 is advantageously formed with a circumferential groove or depres-
sion around its outer periphery to afford an air space between the hoop and the
cover.
In order to secure the tyre to the rim a series of T-headed bolts'f may be used
with or without cement, the bolts having their heads of sufficient length to bear
upon the two edges of the hoop on its inner side, as clearly shewn in Figure 1,
and having the shank passed through the wheel rim a and provided with a nut
on the outer end. Whilst the tyre is being applied the heads are placed so that
their sides are parallel with the edges of the wheel rim and when the tyre is in
position the said bolts are pushed up through the slot of the tyre and turned
so that the ends of the heads bear upon the tube as hereinbefore stated, or, if
desired, slots may be formed through the rim through which the heads of the
bolts can be passed.
When my tyre is applied to the wheels of carriages, cabs, vans and other vehicles
having wooden felloes I form in the felloe a groove semicircular in transverse
section to receive say half of the depth of the tyre but in place of using T-headed
bolts as before described I prefer to use thin sheets g, g of metal having internally
projecting edges or tongues h, h adapted to enter recesses formed in the sides of
the cover.
The said plates are advantageously formed in sections and are secured
to the wheel by screws, bolts or other suitable means.
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. In a wheel tyre the combination of a tubular hoop of metal having a cir-
_cumferential slot on its inner periphery, the said tube being formed in one piece
or in sections, and an outer cover of elastic material adapted to embrace the said
hoop and provided at its edges with lips or flanges which engage with the edges of
the hoop, substantially as described.

page_text: 2. In a wheel tyre the combination of a tubular hoop of metal having a cir-
circumferential slot on its inner periphery and a circumferential groove or recess on
its outer periphery, the said tube being formed in one piece or in sections, and
an outer cover of elastic material adapted to embrace the said hoop and provided
at its edges with lips or flanges which engage with the edges of the hoop, sub-
stantially as described.
3. In a wheel tyre having an outer elastic cover stretched over a metal tubular
hoop the use of T-headed bolts inserted into the hoop and adapted to compress
the cover between the hoop and the wheel rim, substantially as described.
4. In a wheel tyre having an outer elastic cover stretched over a metal tubular
hoop, the use of plates such as g, g fixed upon the sides of a wooden felloe for holding
the said tyre in position, substantially as described.
5. The manufacture and use of wheel tyres, substantially as herein before
described and illustrated in the accompanying drawing.
Dated this 26th day of March 1898.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.