Improvements in Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 23rd Feb., 1892
Complete Specification Left, 23rd Dec., 1892-Accepted, 4th Feb., 1893.
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres.
I, JOHN SAMUEL SMITH, of 244, Borough High Street, in the County of
Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in pneumatic tyres and has for object to
provide an inflated air tyre which shall have a greater depth than width thereby
offering more resistance to pressure and possessing more resiliency than the ordinary
round inflated tyres.
For this purpose I divide the outer case or jacket of the tyre into two or more
chambers one above the other the divisions between the chambers being advan-
tageously formed by flaps or webs attached to the inner sides of the case or jacket.
These divisional flaps or webs also form stays to prevent the tyre from bulging
sidewise when subjected to pressure. Each of the chambers is fitted with an air
tube and a valve for inflating the same in the usual manner.
Dated the 23rd day of February 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres.
I, JOHN SAMUEL SMITH, of 244, Borough High Street, in the County of
London, Engineer, 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 :-
This invention relates to improvements in pneumatic tyres and has for object to
provide an inflated air tyre which shall have a greater depth than width thereby
offering more resistance to pressure and possessing more resiliency than the ordinary
round inflated tyres.
For this purpose I divide the outer case or jacket of the tyre into two or more
compartments one above the other the divisions between the said compartments
being advantageously formed by flaps or webs attached to the inner sides of the
case or jacket. These divisional flaps or webs also form stays to prevent the tyre
from bulging sidewise when subjected to pressure. Each of the chambers is fitted
with an air tube and a valve for inflating the same in the usual manner, such valves
being upon the sides of their respective chambers or on the inside of the rim, the
air tubes in the latter case passing between the air chambers and the jacket.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing which represents a transverse section of a
wheel rim having a tyre constructed according to my invention applied thereto.
a is the rim of the wheel and b is the pneumatic tyre, c, c are the compartments
of the said tyre which are concentric with the wheel, and d, d are the webs or flaps
separating the said compartments and serving to prevent the jacket from bulging.
These flaps are secured to the inner lining or jacket e of the tyre on opposite
sides thereof and after the air chambers f, f are introduced are connected together.
When using a tyre of the kind hereinbefore described I advantageously employ
a wheel having a kind of clip rim as shewn, by which the inner part of the tyre is
embraced, as this form of rim serves to give lateral support to the tyre.
Although I have shewn the tyre as formed with four compartments it is to be

page_text: understood that it may be formed with a greater or less number. The depth of the
rim may also be varied according to the number of compartments in the tyre.
To increase the lateral rigidity of the tyre I advantageously make it broader
next to the rim than at the tread as shewn.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. A pneumatic tire containing two or more concentric compartments, the
dividing flaps or webs between the said compartments serving to prevent the tire
from bulging. substantially as described.
2. The manufacture and use of pneumatic tires substantially as hereinbefore
described and illustrated in the accompanying drawing.
Dated this 23rd day of December 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.