Improvements in Pneumatic Tires.
Year: 1896

page_text: JOHN MAXFIELD 326 Liverpool Road N. Manufacturer do hereby declare the
nature of this invention to be as follows:-
My invention relates to an improved pneumatic tiro for wheels of cycles, motor
cara or other vehicles.
It consists of an outer case only, no inner air bags being required, this outer
case is provided with a small tube or tubes which, when filled with air or gas
hermitically closes the case or tire and secures the said tire to the rim.
To better illustrate my improvements reference is made to the annexed drawings.
In Fig. 1. A is the case or tire, B, is a small tube secured to one side of the case
and C is the rim of wheel. The tube B may be filled with air by a separate
valve, or it can have small holes communicating with the large tire so that one
valve fills both cavities.
Fig. 2. is a modification, having two small tubes B, one on either side of case or
tire, and where the case meets it is flat.
Fig. 3. is a further modification of my invention, having only one small tube B
on the outside of tire and the rim is formed to correspond, on the other. The
small tubes B may be made any section other than round, such as aquare or
oval.
I use a small flat valve of india rubber inside the tire, for inflating, or any other
suitable valve may be used..
Deted this 18th day of August 1896
Improvements in Pneumatic Tires.
JOHN MAXFIELD 326 Liverpool Road, London, N. Manufacturer 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:-
My invention relates to an improved pneumatic tire for wheels of cycles or any
other vehicle to which the said tire would be applicable.
The principal object in my improved tire is to produce a tire without an inner
air bag, and to facilitate a ready access to the inside of tire for repairing punctures
that may occur or for any other purpose.
The repairing can be accomplished immediately, by any person of ordinary
ability, with a piece of gold-beaters skin or any adhesive material and the tire can
be used directly after the patch is put on, as the pressure of the air securely holds
the patch in its place.

page_text: In the ordinary pneumatic tires with the innor air bag, when a puncture occurs
it is much more difficult to locate the trouble than with my improved tire, and
when found it requires a competant person to repair it, and after repairing, it
is necessary to stand some time to dry, or the pressure of the air is liable to
force the patch off again.
In carrying my said invention into practice I form out of one piece of material,
the cover A Figure 1, (shown on drawing left with my Provisional Specification)
forming the tire and the small tube B, which is formed at one edge of the cover A,
the othor edge of cover A is shaped to receive the tube B, when placed in tho
rim C. The material used for making the tire A, is composed of layers of
india rubber and linen, canvas, or any other non-elastic material. I place
between the layers, in that part of the tire which comes in contact with the
ground, and extending about half an inch up either side of the tire, layers of
manilla, jute or asbestos fibre, this to a great extent prevents the puncturing of the
tire.
The tube B is provided with small punctures communicating with the inside of
cover A, and the inflating valve is also fixed in this tube, so that when the cover A
forming the tire is placed in its position on the rim C, the small tubo B is inflated,
(with the ordinary kind of air pump), and becomes distended thereby hermetically
closing the cover A forming the tire. The tire A is inflated by the air passing
through the punctures in small tube B.
By providing two valves, one in the tube B and the other placed in the cover A,
I could inflate the small tube B, separately for hermetically closing the covor A, tho
tire would then be inflated in the usual manner. In this case I should not have
any punctures in the tubo B.
Figure 2. Phows a modification of my inventiou, two small tubes B are used, one
on either side of the cover A and where the cover A meets it is flat so that when
the small tubes B are inflated the two flat surfaces are forced togethor, thereby
hermetically closing the tire.
Figure 3, is similar in construction to Figure 2, but only one tube B is used,
the rim C is formed to correspond to the other tube.
I may form the small tubes B in various sections other than round such as
three-square, square, oval or flat and also use them in various ways for hermetically
closing the cover A forming a pneumatic tire, without departing from the spirit
of my invention.
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
olaim is :-
1) A pneumatic tire constructed as herein described.
2) In combination with a pneumatic tire, the small tube B for hermetically
closing the outer cover A.
3) Iu combination with a pueúmatic tire, the use of the small tube or tubes B,
in any shape or form, for the purpose of hermetically closing the outer cover A
forming the tire.
. 4) In combination with a pucumatic tire, the use of pneumatic pressure for
bermetically sealing the cover A forming the tire, before the said tire is inflated.
Dated this 3rd day of December 1896.
JOHN MAXFIELD.