Improvements in or in connection with Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 3rd Nov., 1892
Complete Specification Left, 2nd Aug., 1893-Accepted, 28th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in or in connection with Pneumatic Tyres.
I, FRANK FOSBROOK GILES of 59 Bewdley Street Kidderminster, Staffordshire,
Inventor do hereby declare the nature of my said invention to be as follows:-
My invention has for its object improvements in pneumatic tyres and refers more
particularly to the wheels of cycles by which I increase the amount of air under
pressure thus obtaining an increase in resiliency at little increase in cost.
In carrying my invention into effect I provide an air tight chamber around the
hub which I preferably form of air-tight flexible material with a steel rim around
the outer edge but which chamber may be formed of metal. I preferably arrange
it so that it may be inserted within the spokes of any machine and so as to be
capable of being easily removed or I may make it permanently fast to the wheel.
This chamber is connected with the tyre by means of a tube or tubes which pass
through the outer rim into the tyre of the wheel so that when the chamber is
inflated the tyre is simultaneously inflated and the air in the chamber always assists
the sensitiveness or resiliency of the said tyre without increasing the size of the
tyre. I may form my chamber of any size to suit the particular requirements of
the case.
Dated this 2nd day of November 1802
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent.
COMPLETE SPECIFICATION.
Improvements in or in connection with Pneumatic Tyres.
I, FRANK FOSBROOK GILES of 59 Bewdley Street, Kidderminster, in the
County of Stafford, Inventor, do hereby declare the nature of my said invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention has for its object improvements in pneumatic tyres and refers more
particularly to the wheels of cycles by which I increase the amount of air under
pressure thus obtaining an increase in resiliency at little increase in cost and
without increasing the size of the tyre which is objectionable by reason of the
tendency of large tyres to skid and pick up the mud.
In carrying my invention into effect I provide an air-tight chamber around the
hub which I preferably form of air-tight flexible material with a steel rim around
the outer edge but which chamber may be formed of metal. I preferably arrange
it so that it may be inserted within the spokes of any machine and so as to be
capable of being easily removed or I may make it permanently fast to the wheel.
This chamber is connected with the tyre by means of a tube or tubes which pass
through the outer rim into the tyre of the wheel so that when the chamber is
inflated the tyre is simultaneously inflated and the air in the chamber always assists
the sensitiveness or resiliency of the said tyre. I may form my chamber of any
size to suit the particular requirements of the case.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto a double sized sheet of drawings upon
which I have illustrated the nature of my said improvements.
Figure 1., is an elevation of a wheel having my additional chamber attached
thereto.
Figure 2 is eventinal section through
1

page_text: Figure 3., is a reduced view of the inner rubber bag for receiving the air.
Figure 4., is a reduced view of a wheel showing a modification in the shape of
the chamber.
Referring to the drawing I provide the air-tight chamber A around the hub B
of the wheel the chamber being here shown formed of an outer covering of canvas A
with an inner rubber bag or receptacle a' the outer covering A being formed
around the outer steel rim D which retains the chamber in a circular shape. The
inner rubber is so formed as shown by Figure 3 where the aperture a³ is provided
to see the hub and so that the chamber can be inserted within the spokes of any
ordinary cycle. The chamber however may be permanently formed with the
wheel in which case its position may be more firmly secured by connecting the
surrounding rim D with the rim E of the tyre of the wheel by additional centre
-spokes e'. The chamber is connected with the interior of the tyre E by means of
one or any number of tubes H thus keeping the air in the tyre and in the chamber
in constant unison. The chamber A may be larger or smaller and may be of any
suitable shape as for instance I may form a circular chamber which may be fixed.
between the hub and the tyre as shown by the Figure 4 where A is the chamber,
E the tyre, and B the hub. I am aware two three or more chamber have been
formed around the outer rim but this has increased the size of the tread which
objection my improvement overcomes.
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
In pneumatic tyers a supplemental air chamber in addition to and connected with
the tyre substantially as and for the purpose herein set forth and shown upon the
accompanying drawings.
Dated this 1st day of August 1893.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.