Improvements in Pneumatic Tires for Velocipedes and other Vehicles, and Methods of Constructing such Tires.
Year: 1893

page_text: Date of Application, 6th Nov., 1893
Complete Specification Left, 7th Aug., 1894--Accepted, 8th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tires for Velocipedes and other
Vehicles, and Methods of Constructing such Tires.
I, AI BERTRAM SHAW, of 17 Chardon Street, Boston, County of Suffolk,
State of Massachusetts, United States of America, do hereby declare the nature of
this invention to be as follows:-
My invention relates especially to a self-sealing pneumatic tubing for tires
for bicycles and other vehicles, the object being to provide means whereby. the
inner tubing when accidentally punctured will automatically seal or close such
opening.
The nature and operation of my said invention will be readily understood by all
conversant with such matters from the following explanation.
In constructing my improved tubing, I stretch the rubber-sheet from which the
tubing is ordinarily made, to nearly its limit in all directions.
I then cement to the
said sheet, a sheet of elastic material in its normal condition or without stretching
it. When the first sheet is released, it contracts the other sheet, as it endeavours
to assume its normal condition.
In constructing the tubing, I turn the first sheet to form the outside of the tube,
the other sheet being, in this case, disposed at the tread of the tire on the inside of
the inflatable tube. Or, instead of making the tube from a sheet, an ordinarily
inflatable tube may be turned inside out, inflated to its fullest extent and then
covered completely by cementing an elastic sheet thereon without stretching it. The
tube being then inflated, it is again turned inside out, disposing the second sheet on
the inside.
When a tube as thus constructed is disposed within the tire and inflated, it has
all the properties of the ordinary tube. In addition, should the tire be punctured
by any sharp article penetrating the inflatable tube, as soon as the said article is
withdrawn, the tension of the outer layer or ply on the inner ply will cause the
opening of the said inner ply to immediately close or seal, thus preventing the escape
of air in a manner which will be readily understood by all conversant with such
matters.
I do not confine myself to employing two plies only one of which is stretched
and the other normal, as any number that are deemed essential for the proper
working of the device may be used, the normal and distended plies preferably
alternating.
Dated the 6th do of Novembar 1802
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C,
Agents for the Applicant.

page_text: Improvements in Pneumatic Tires for Velocipedes and other
Vehicles, and Methods of Constructing such Tires.
I, AI BERTRAM SHAW, of 17 Chardon Street, Boston, County of Suffolk,
State of Massachusetts, United States of America, Mechanic, 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 especially to a self-sealing pneumatic tubing for tires
for bicycles and other vehicles, the object being to provide means whereby the
inner tubing when accidentally punctured will automatically seal or close such
opening.
The nature and operation of my said invention will be readily understood by all
conversant with such matters from the following explanation, reference being had
to the accompanying drawings forming part of this Specification, in which
Figures 1 and 2 are views illustrating the method of preparing the tubing of my
improved tire ;
Figure 3 a sectional view of a portion of the tubing;
Figure 4 a like view showing the tubing punctured; and
Figure 5 a plan view showing the action of the tubing enclosing the punctured
portion.
Like letters indicate corresponding parts in the different figures of the drawings.
In constructing my improved tubing I stretch the rubber sheet, A, from which
the tubing is ordinarily made, to nearly its limit in all directions. I then cement to
the sheet A, a sheet B of elastic material in its normal condition or without
stretching it. When the sheet, A, is released, it contracts the sheet, B, as it
endeavours to assume its normal condition.
In constructing the tubing, I turn the sheet, A, to form the outside of the tube,
the sheet, B, being in this case disposed at the tread of the tire on the inside of the
inflatable tube. Or, instead of making the tube from a sheet, an ordinary inflatable
tube may be turned inside out, inflated to its fullest extent and then covered
partially or completely by cementing an elastic sheet, B thereon without stretching
it. The tube being then released or allowed to contract, it is again turned inside
out, disposing the sheet, B, on the inside.
When a tube as thus constructed is disposed within the tire and inflated, it has all
the properties of the ordinary tube. In addition, should the tire be punctured by
any sharp article penetrating the inflatable tube, as soon as the said article is
withdrawn, the tension of the outer layer or ply, A, on the inner ply will cause
the opening, f, of the said inner ply to immediately close or seal, as shown in Figures 4
and 5, thus preventing the escape of air in a manner which will be readily
understood by all conversant with such inatters.
I do not confine myself to employing two plies only one of which is stretched
and the other normal, as any number that are deemed essential for the proper
working of the device may be used, the normal and distended plies preferably
alternating.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1st. That improvement in the method of making inflatable tubing for pneumatic
tires which comprises forming the tube of two plies of elastic material, one of
said plies being stretched and the companion ply secured to a face thereof without
stretching.

page_text: 2nd. That improvement in the manufacture of inflatable tubing for pneumatic
tires which comprises the covering of a face of said tube when inflated or stretched
with an elastic material in its normal condition.
3rd. That improvement in the method of making inflatable tubing for pneumatic
tires which comprises turning a rubber tube inside out, inflating said tube and
cementing a sheet of rubber to a portion or the whole of the surface of said tube,
said sheet being in its normal condition, then releasing the tube and again turning
it inside out to its first position.
4th. As a new article of manufacture an inflatable tube for bicycle-tires formed
of two plies of elastic material, one ply in its normal condition being cemented to
the face of the companion ply when stretched or distended.
5th. The improved tire herein described comprising the distended ply, A,
and the ply, B, secured to a face thereof substantially as and for the purpose set
forth.
Dated this 7th day of Auơust 1894
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.