Improvements in Tires for Velocipedes or other Vehicles.
Year: 1891

page_text: Date of Application, 16th Apr., 1891
Complete Specification Left, 19th May, 1891-Accepted, 20th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Tires for Velocipedes or other Vehicles.
I JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this invention which has been com-
municated to me from abroad by John Haven Cheever of 15 Park Row New
York City in the United States of America Manufacturer to be as follows:-
The present invention has reference to rubber tires for velocipedes and other
vehicles and more particularly to that class known as "cushion" tires which are
moulded with an inner hollow space serving as a cushion.
It has been found heretofore in the employment of such tires that constant
compression of the tire when in use causes it to flatten the inner surface assuming
an acute angle in consequence of which the rubber cracks from the inside and the
tire looses its elasticity and tends to permanently assume the flattened shape. The
object of this invention is to prevent the cracking of rubber tires from the interior
and this is effected by moulding on the inner surface ribs or reinforcements on
opposite sides and along the lines where the compression usually causes the cracks
to occur.
These ribs or reinforcements stiffen the tire along the sides where the greatest
strain occurs in use and thereby increase its elasticity as well as its durability.
Since the improved tire does not flatten so much as do those of ordinary con-
struction there is less contact with the surface of the ground and less wear than
with tires as hitherto made and since it does not bulge so much at the sides it is
also less exposed to cutting from the rim of the felloc.
Dated thin 10th 1 of il 1801
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Tires for Velocipedes or other Vehicles.
I JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention which
has been communicated to me from abroad by John Haven Cheever of 15 Park
Row, New York City in the United States of America Manufacturer and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:—
The present invention has reference to rubber tires for velocipedes and other
tires which are
articles and more particularly to that class known as "cushion
moulded with an inner hollow space serving as an air cushion.
It has been found heretofore in the employment of such tires that the constant
compression of the tire when in use causes it to flatten, the inner surface assuming
an acute angle in consequence of which the rubber cracks from the inside and the
tire loses its elasticity and tends in time to assume permanently the flattened shape.
The object of this invention is to prevent the cracking of rubber tires from the
interior and this is effected by moulding on the inner surface ribs or reinforcements
situated on opposite sides and along the lines where the compression usually causes
the cracks to occur.
The invention will be more fully understood from the following description

page_text: reference being had to the accompanying drawing which forms part of this Speci-
fication and shews in cross-sectional perspective, a view of the improved tire made
according to this invention.
Two ribs or reinforcements a a are provided on the inner opposite sides of the
tire A formed integral therewith and extending the whole length of the tire.
In the use of the improved tire, the position of these ribs prevents the bending
of the tire along the lines where the greatest compression occurs distributing the
effect above and below these lines.
These reinforcements, moreover, serve to stiffen the tire along the sides where the
greatest strain occurs, and thus increase the elasticity as well as the durability of
the tire. Since the improved tire cannot flatten when in use so much as do those
of the ordinary construction, wear is reduced by reason of the smaller surface in
contact with the ground.
I have shown the reinforcing ribs as being semi-elliptical in cross-section but it is
obvious they may be of other suitable configuration.
The tire may be moulded in the usual manner of making cushion tires that is to
say, it may be formed in what is known as a tubing machine a sufficient quantity
of water being injected into the hollow space before the same is spliced. It is
then put into moulds and vulcanized under heat and pressure.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what 1
claim is―
A hollow tire provided with ribs or reinforcements situated on opposite sides of
the inner surface substantially as hereinbefore described.
Dated this 19th day of May 1891.
J. H. JOHNSON & Co.,
Agents.