Improvements in Inflated Cycle Tyres.
Year: 1892

page_text: Date of Application, 18th May, 1892
Complete Specification Left, 18th Mar., 1893-Accepted, 22nd Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Inflated Cycle Tyres.
I, WILLIAM COULTER of 23 Park Street Chorlton on Medlock in the City
of Manchester County of Laucaster Manager of India Rubber Works do hereby
declare the nature of this invention to be as follows:-
The improvements which are the subject of this invention, refer to the con-
struction of inflated cycle tyres, or cushions, & the improvement consists in the use
of inflated balls, placed side by side in the rim of tyre, or placed in cups attached to
rim of tyre, each ball being separate, and may be replaced by another, when, by
piercing (or any other means) it becomes uninflated.
When the ball is placed into the cup, the pressure of air inside, may be increased,
by drawing it closer into the cup, by means of a small bolt attached by button, or
bolt head, into the ball, & passing through the rim of tyre, with a nut for screwing
up, on the under side. By passing a hole through the said bolt, the ball can be
charged with air, by means of an inflator, from the under side of tyre.
may if preferable make these inflated balls egg shaped or tubular, each one
being attached separately, & moveable for replacement.
If desirable, 1 cover these balls, or sections forming the tyre, with a shield or
protector formed of insertion, or sheet rubber, or any other durable material, said
shield covering the balls or sections in the form of a band, around the tyre.
Dated this 16th day of May 1892.
WILLIAM COULTER.
COMPLETE SPECIFICATION.
Improvements in Inflated Cycle Tyres.
1, WILLIAM COULTER, of 23 Park Street, Chorlton-on-Medlock, in the City
of Manchester, in the County of Lancaster, Manager of India Rubber Works, 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:-
The improvements which are the subject of this invention relate to the con-
struction of pneumatic or inflated tyres such as are employed on the wheels of
bicycles, tricycles and other road vehicles, and the object of this invention is to
obviate the necessity of discontinuing the use of the tyre if said tyre should be
pierced in any part with a thorn or a nail or other sharp substance.
I attain this object by the means hereinafter described and as illustrated in the
accompanying sheet of drawings; in the several views shown therein similar letters
refer to similar parts;
Figs. 1 to 3 illustrate different forms of air chambers constructed according to
my invention.
Fig. 4 is a transverse section of Fig. 1 attached to the rim of a wheel within an
envelope or cover of canvas and india rubber.
Fig. 5 is a longitudinal section of the same.
Fig. 6 is a transverse section of Fig. 2 attached to the rim of a wheel within a
cover or envelope.
Fig. 7 is transverse section of an air cushion in the form of a ball attached to
the rim of a wheel by being bolted thereto.

page_text: In the several views shown on drawings, a is the vulcanized india rubber sectional
air chamber, c is the canvas and india rubber envelope or covering, d is the rim of
the wheel.
place these air
I construct a pneumatic or inflated tyre, by placing around a metal rim of a
wheel of the ordinary construction, a succession of separate inflated balls or air
chambers, formed either of a spherical or other shape that may be most convenient,
said air chambers being constructed of vulcanized india rubber:
chambers in a line as shown on drawings around the outer surface of the metal rim,
to which they may if preferred be attached by cementing thereto, or may be held
in cups and contracted by being drawn into said cups by a screw attached thereto
and passing through the rim. When an outer covering or envelope is employed,
I prefer to place any of the aforesaid sections or balls around the rim of the
wheel, without being cemented thereto but in a compressed state, viz. in the space
that would ordinarily contain a given number, I place a greater number, thereby
bringing the parts that are in contact with each other into a much closer connection,
so that if a puncture occurs in any section or air chamber, it will, when the
punctured part is turned round so as to be in contact with the adjacent air chamber,
be practically closed for the emission of air.
If it is intended to construct a tyre with air cushions such as herein before
described to be used without any outer covering, I cement or bolt said air cushions
to the rim of the wheel in a compressed state so that greater resistance to
compression from the weight that is carried may be obtained.
I do not confine myself to the precise forms of sectional air chambers herein
before described as these may be modified in shape as may be preferred, and any of
the forms of outer coverings of india rubber and canvas such as are at present in
use for enclosing an air tube may be employed: by these means a tyre may be
built in which the effects of puncture will be neutralized by the sectional
construction of the air chambers.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
In pneumatic or inflated tyres which may be employed on the wheels of bicycles,
tricycles, and other road vehicles, the use of sectional air chambers composed of
balls either of the form shown on drawings or of other preferred shape, said air
chambers being attached to the rim of a wheel by being cemented thereto, or by
bolts, or by means of an outer covering or envelope in the manner and for the
purpose substantially as herein before described.
Dated this 17th day of March 1002
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester,
Agent for the Applicant.