Improvements in Elastic Tyres for Cycle and other Vehicle Wheels and in Rims therefor.
Year: 1899

page_text: Date of Application, 15th Aug., 1899
Complete Specification Left. 14th May. 1900-Accented 23rd June 1000
PROVISIONAL SPECIFICATION.
Improvements in Elastic Tyres for Cycle and other Vehicle Wheels
and in Rims therefor.
I, JOHN SMITH, of Westcroft House, Carshalton, Surrey, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in elastic tyres for cycle and other
vehicle wheels, and in rims therefor, and in accordance therewith I provide a
suitable tube capable of inflation through a valve in the usual manner, such tube
being adapted to fit within the rim of the cycle or other vehicle wheel and lie
therein to form an air-filled cushion for a separate tyre constituting the tread
or part which comes in contact with the ground.
The said air-filled cushion, when inflated is designed to conform to the curve
of the bed of the rim wherein it lies, and to be in the form of a concave elipse
in cross-section.
Upon the said air-filled cushion I provide the tyre proper, which may either
be of solid or cushion form, whichever is desirable or convenient.
The rim into which fits the air-cushion aforesaid, has its edges turned over
inwardly or toward one another, so that such inwardly turned over edges enclose
the edges of the air-cushion and retain the latter in position when it is inflated.
The edges of the rim may also take into recesses in the periphery of the tread
portion or tyre proper for the purpose of holding same in position, or such tyre
proper may be solutioned or otherwise attached to the air-cushion.
I preferably fashion the lower side of the tread part or tyre proper with ribs
or projections thereon, in order to prevent the said tread part or tyre proper slip-
ping on the air-cushion.
Dal 19
1
A
1000
Improvements in Elastie Tyres for Cycle and other Vehicle Wheels
and in Rims therefor.
I, JOHN SMITH, of Westcroft House, Carshalton, Surrey, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
This iuvrantian volatos to imunovamanta
aleatic Louna
1
1

page_text: vehicle wheels, and in rims therefor, and in accordance therewith I provide a
suitable tube capable of inflation through a valve in the usual manner, such tube
being adapted to fit within the rim of the cycle or other vehicle wheel and iie
therein to form an air-filled cushion for a separate tyre constituting the tread
or part which comes in contact with the ground.
The said air-filled cushion, when inflated, is designed to conform to the curve
of the bed of the rim wherein it lies, and to be in the form of a concave ellipse
in cross-section.
الله
Upon the said air-filled cushion I provide the tyre proper, which may either
be of solid or cushion form, whichever is desirable or convenient.
The rim into which fits the air-cushion aforesaid has its edges turned over
inwardly or toward one another, so that such inwardly turned over edges enclose
the edges of the air-cushion and retain the latter in position when it is inflated.
I preferably fashion the lower side of the tread part or tyre proper with ribs
or projections thereon, in order to prevent the said tread part or tyre proper slip-
ping on the air-cushion.
In order that this my said invention may be the more readily understood and
carried into practical effect, reference is hereby made to the accompanying sheet
of illustrative drawings, wherein:
Fig. 1 is a sectional view of my improved tyre and rim, and Fig. 2 a per-
spective view thereof. Referring to the drawings, wherein like letters of refer-
ence indicate corresponding parts wherever occurring in both figures, repre-
sents the rim or felloe of the wheel, in which rim or felloe is fitted the inflatable
tube or cushion b, such tube or cushion being inflated and deflated by means of
a suitable valve b' in the ordinary manner. c represents the tyre proper or tread
portion, which is held in the rim a by compression, that is to say, by its own
elasticity, the said tyre proper resting in the bed formed by the cushion band
deriving the greater part of its resiliency therefrom.
The part of the periphery of the tyre c which comes in contact with the air
cushion b is preferably ribbed or serrated as at c', in order to prevent it slipping
or creeping" in its bed.
66
The tread part of the tyre c which comes in contact with the ground may be
ribbed or serrated as at be in order to prevent side-slip, or such periphery may
be of plain form if desirable.
The edges of the rim a are rolled or turned over inwardly toward one another
and somewhat downwardly, as shewn by a¹, in order that such rim may enclose
the edges of the air-cushion b and retain the latter in place.
The edges of the rim a do not press against the tyre c, in order that such
tyre may be pressed down upon its bed b.
In order to assist in the fixing of the tyre proper c and air cushion b in the
rim a, I may provide a series of perforations a² in the said rim near the rolled
edges of same, through which short headed wires may be temporarily inserted in
order to constitute partitions to separate the said air-cushion from the tyre proper
during the fixing of same in the rim.
The said wires would pass over the upper edges of the air cushion and beneath
the tyre proper, and, while holding the former down, would constitute a tem-
porary support for the tyre proper until the air cushion was inflated and the
tyre proper sprung into its place in the rim, thus ensuring that both the air
cushion and the tyre proper assume their correct positions in the rim.
Having now particularly described and asecrtained 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 improvements in elastic tyres for cycle and other vehicle wheels, and in
rims therefor, consisting in an inflatable air-cushion held entirely within the rim,
and a tyre proper seated upon such air cushion, and held by the rolled edges of
the rim, said rim having its lengthwise edges rolled or turned inwardly and down-

page_text: wardly so as to enclose the edges of the air cushion and also grip the periphery
of the tyre proper, substantially as described and illustrated.
2. In elastic tyres and rims therefor, the combination of an inflatable air
cushion held within a rolled edged rim; with a solid or cushion tyre proper consti-
tuting the tread portion which comes in contact with the ground, said tyre proper
resting upon the air-filled cushion and being held within the rim by compression
or elasticity, substantially as described and as illustrated by the drawings.
141
1000
.HUGHES, SON & Co.,
38, Chancery Lane, W.C., for Applicant.
.HUGHES, SON & Co.,
38, Chancery Lane, W.C., for Applicant.