Improvements in and relating to Elastic or Compensating Tyres, and Wheel Rims for Velocipedes and other Vehicles.
Year: 1897

page_text: Date of Application, 18th Feb., 1897
Complete Specification Left, 18th Dec., 1897--Accepted, 18th Mar., 1898
Improvements in and relating to Elastic or Compensating Tyres, and
Wheel Rims for Velocipedes and other Vehicles.
JAMES WILLIAM BOYCE, of Ebenezer Villa, Whitecross Square, Cheltenham,
in the County of Gloucester, Manufacturer, do hereby declare the nature of this
invention to be as follows:-
This invention relates to temporary and permanent tubes as tyres proper, and
also to rims, or felloes of wheels upon, and to which such tubes shall be detachably,
or permanently secured, and the primary object of the said invention is the con-
struction of a tyre which shall possess quick compensating reciprocating or
reflexible power, that is to say, elasticity, or embodied energy such as shall con-
stitute the said tyre capable of promptly reasserting its normal form, or figure
against temporary depression, or concussion, impact, or impingement as the result
of pressure upon, or contact with the ground; thereby combining resiliency, and
speed with stability.
Fig. 1, represents section of tyre with narrow tread, and rim with woven wire
platform.
Fig. 2, represents section of tyre with narrow tread, and flexible tube; and
rim with caoutchouc lining.
Fig. 3, represents section of tyre with broad tread, and rim with inflatable
lining.
Fig. 4, represents section of tyre with divided base, and rim with inflatable
lining.
Fig. 5, represents section of tyre with auxiliary chamber enclosing inflatable
tube and rim with inflatable lining.
In the accompanying drawings like letters, and figures represent like parts
throughout.
The tube a Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, may be composed of spring, or
other steel, bentwood, or equivalent thereof, or substitute therefor. It may be
rolled, or otherwise desirably constructed--by any known, or special process-
preferably, but not necessarily, as an endless hollow ring, either completely or
partially tubular in cross section, and may have slots, or cuts extending vertically
as shown Fig. 5-obliquely or otherwise from its periphery, or in the direction
thereof, and may be pierced, or stamped, or ribbed in any desirable manner
through, or upon any portion of its surface, and its exterior may be covered with
any desirable material.
The duplex, or auxiliary ring, or endless chamber a¹ Fig. 5 is shewn as having
been constructed seperately, and with its edges overlapping the divided periphery
of the tube a. This auxiliary tube, or chamber may however be constructed of
woven wire, or as an integral portion of the tube a, and be cut, or slotted to any
desirable extent, and it may also be varied in contour and size, and if desired be
located entirely within the said tube a, and be formed somewhat semicircular in
cross section, its extreme points coming into contact with, and riding upon, or

page_text: A method of construction of the tube a, which may be adopted, is that of wind-
ing spirally, or otherwise upon a suitable mandrel, a length, or lengths of material,
the ends whereof may be joined in any suitable manner.
A helical tube thus formed, may be enclosed by another helical tube, the coil,
or coils whereof may, if desired tend in opposite directions, and each layer of
material may be lined with any desirably soft material which would thereby
intervene between the primary coils. Thus say a strip of spring steel having been
formed into a helical tube: a strip of mock chamois, canvas, caoutchouc, or other
skin, or fabric may be wound in the like manner, or otherwise over the aforesaid
steel tube. A strip or strips of spring steel, wood, cane, whalebone, or equivalent
material may then, as an additional layer, be wound helically, in the opposite
direction, and the ends suitably joined, whereupon canvas may be placed, as a
covering, and the tube thus built up may be provided with a caoutchouc tread,
of any desirable width.
Dat the
רד •
1
1000
Improvements in and relating to Elastic or Compensating Tyres, and
Wheel Rims for Velocipedes and other Vehicles.
JAMES WILLIAM BOYCE, of Ebenezer Villa, Cheltenham, in the County of
Gloucester, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The invention relates to temporarily, and permanently closed tubes, and to
wheel rims, upon and to which such tubes shall be detachably secured; and the
object is to construct a tyre which shall possess elasticity, and reflexive power, and
energy somewhat allied to, or after the character of an isotropic body; in order
that the tyre may be capable of quickly reasserting its normal form after
depression resulting from contact with the ground, and thereby combining stability
with resiliency, and the desired capacity for speed.
In the accompanying drawings
Fig. 1. is a cross sectional view of a temporarily closed tube, or hollow ring;
inflated cushion, and wheel rim.
Fig. 2, is a transverse section of a modified form of the foregoing wherein the
ring is built up in sections.
Fig. 3, is a similar view to Fig. 2 illustrating slight modifications.
Fig. 4 illustrates partly in cross section and partly in elevation a modified forni
of Fig. 2.
In the aforesaid drawings like letters indicate like, or equivalent parts; the
drawings filed with my Provisional Specification not being adopted for the purpose
of reference to the Complete Specification.
A indicates an endless hollow steel ring, A' the tread.
A sections of hollow steel ring.
Ban annular inflatable flexible cushion.
B', the head of the cushion B, B2, side chambers in the cushion B, C, the wheel
rim.
The hollow steel ring, may be pressed or stamped, rolled, or otherwise brought
to the desired form; bent and suitably tempered by any known, or special process,
whereby high class steel, or its equivalent of light guage may be used, without
unduly denuding it of its fibre, and carbon, by over-heating, and reheating,
maximum strength, and resiliency, and economy of weight in the material being

page_text: with the tread A¹, and rendered temporarily tubular by means of the flexible
annular cushion, B, adapted to contain air under pressure, and carrying a valve;
and of a wheel rim, C, substantially as and for the purpose herein before specified.
2. The combination of an endless hollow ring, A, divided along its base, or
inner periphery, and suitably slotted, and provided with a tread, A; of a flexible
annular cushion, B, adapted to contain air under pressure, and carrying a valve;
and of a wheel rim, C, substantially as, and for the purpose hereinbefore specified.
3. The combination of a permanent endless steel tube; of a flexible annular
inflatable cushion such as, B, Fig. 3, provided with a valve: and of a wheel
rim, C, substantially as, and for the purpose hereinbefore specified.
4. An elastic tyre consisting of segmental, or like parts such as, A2, as forming
a composite ring, in combination with the outer peripheral rings, or binder A
and the adjacent parts, A', A10, A", A, and A, the whole being suitably bolted
together, and detachably connected to the wheel rim, C, by means of a flexible
annular cushion, B, having a cylindrical head, B', and adapted to hold air under
pressure, all, substantially as and for the purpose herein before specified.
5. Forming the inflatable annular cushion B with its compartments, and of a
shape whereby it retains the endless hollow ring, A, or the sections A2 of the com-
posite ring Figs. 2, 4, from lateral movement off the wheel rim.
6 The combination with a wheel rim; of a band constructed of woven wire
and secured to the sail wheel rim so that it acts as a semi flexible platform, or
ledge for the tyre, or the annular inflatable cushion, B, substantially as herein-
before specified.
7. Elastic tyres and wheel rims constructed and working substantially as herein-
before described in reference to Figure, 1, Figure, 2, Figure, 3, and Figure 4 of
the accompanying drawings.
Dated this AL 1
100