Improvements in Pneumatic Tyres for Velocipedes and other Vehicles.
Year: 1892

page_text: Date of Application, 2nd Mar., 1892
Complete Specification Left. 2nd Jan., 1893-Accepted, 25th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres for Velocipedes and other
Vehicles.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from L. Rochet & Cie., of
74, Rue de la Folie Regnault, Paris, in the Republic of France, Manufacturers,)
to be as follows:-
This invention consists of an improved pneumatic tyre for the wheels of
velocipedes and other vehicles.
A pneumatic tyre constructed according to this invention comprises an air-tube
made of caoutchouc and a cover composed of caoutchouc and cloth or other fabric;
the edges of the cover being formed with enlargements which project towards the
centre of the rim.
The wheel-rim is formed with a recess on each side; the inner side of each
recess having a shoulder projecting outwards for engaging with one of the
enlargements on the cover.
The tyre is secured in and about the rim in the following manner :-The air-tube,
before being inflated, is placed within the cover, and the two are arranged about
the rim; the enlarged edges of the cover being inserted in the recesses of the rim.
Each of the enlargements is forced beneath the shoulder of its recess by means of
a cord wound circumferentially on the rim between the outer side of the recess and
the margin of the cover.
When the tyre is inflated, the distension of the air-tube is limited by the cover
which embraces the same, and which is secured to the rim by reason of its enlarged
edges being held in engagement with the shoulders of the recesses, owing to the
presence of the cords wound round the rim.
Although the above-described mode of securing the cover is peculiarly adapted
for use with an all-rubber" air-tube, an air-tube in which canvas or tape is
comprised may, if preferred, be employed.
·ה .י.ם
G. G. M. HARDINGHAM.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres for Velocipedes and other
Vehicles.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer and Chartered Patent Agent, do hereby declare
the nature of this invention (a communication to me from L. Rochet & Cie., of
74, Rue de la Folie Regnault, Paris, in the Republic of France, Manufacturers,)
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 pneumatic tyres for the wheels of velocipedes and other
vehicles

page_text: A pneumatic tyre constructed and secured in position according to the improved
method the subject of this invention is represented in transverse section in the
accompanying drawing, and comprises an air-tube a, made of caoutchouc, and a
cover b, composed of caoutchouc and cloth or other fabric; the edges of the cover
being formed with enlargements & which project inwards towards the centre of
the rim. The wheel-rim is formed with a recess or groove c on each side; the
inner side or wall of each recess having a shoulder c', projecting laterally outwards
for engaging with one of the enlargements 'b' on the cover b.
The tyre is secured in and about the rim in the following manner :-The air-
tube a, before being inflated, is placed within the cover b, and the two are arranged
about the rim the enlarged edges 6161 of the cover being inserted in the recesses cc
of the rim. Each of the enlargements 661 is forced beneath the shoulder c¹ of
its recess by means of a cord d, which may be of any suitable material, wound
circumferentially on the rim between the outer wall of the recess c and the margin
of the cover b.
When the tyre is inflated, the distention of the air-tube a is limited by the
cover which embraces the same, and which is secured to the rim by reason of
the enlarged edges being held in engagement with the shoulders c¹ c¹ of the
recesses, owing to the presence of the cords dd wound round the rim and filling
the remainder of the groove-spaces.
Although the above-described mode of securing the cover is peculiarly adapted for
use with an "all rubber" air-tube, an air-tube in which canvas or tape is comprised
may, if preferred, be employed.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim –
In a pneumatic tyre in which an inflatable air-tube and cover are secured in
position about a double-grooved wheel-rim by engaging inwardly-projecting
enlargements on the edges of the cover beneath outwardly-projecting shoulders
formed on the inner walls of the rim-grooves, the employment of cords wound
about the wheel-rim, so as to fill the vacancies in the grooves between the outer
sides of the cover and the outer walls of the grooves respectively, and thereby to
retain the projections on the edges of the cover beneath the projecting shoulders
of the rim-grooves, substantially as herein described.
Dated the 31st day of December 1892.
G. G. M. HARDINGHAM.