Improvements in or applicable to Pneumatic Tyres for Vehicles.
Year: 1899

page_text: Date of Application, 4th Oct., 1899-Accepted, 11th Nov., 1899
COMPLETE SPECIFICATION.
Improvements in or applicable to Pneumatic Tyres for Vehicles.
We, JACOB JUNG, of 40, Ludwigsstrasse, Rhodt, Pfalz, Germany, Manu-
facturer and HEINRICH VEITH, of 4, Edesheimerstrasse, Edenkoben, Pfalz,
Germany, 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:-
The object of our said invention is to provide means for preventing the punctur-
ing of the inflating tube of pneumatic tyres by nails splinters thorns and the like.
It has been proposed to use shields or guards of hard and unyielding substances
such as metal inserted between the inflating tube and the outer cover so as to
prevent direct contact with the inflating tube. Such hard metallic shields intro-
duce however their own disadvantages in that they are liable to cut and wear
the inflating tube.
According to our said invention which is hereinafter described with reference
to the accompanying drawings we use an inserted shield or guard a shown in
cross section in Figs. 1 and 2 which lies between the inflating tube c and the
outer cover b. This inserted guard is however made soft and yielding and while
acting as a soft cushion for the air tube it serves as a shield against the penetra-
tion of pointed objects.
This quality of impenetrability combined with softness is attained by the par-
ticular construction we employ. Two strips of cellular cloth linen woollen cloth
or felt are coated on both sides with resin soapstone or the like and are laid
on each other between wadding wool or other soft material e and sewed up in
cloth casings f.
The characteristic feature of our said invention consists in the employment of
the strips of cloth (coated with resin or the like) lying between wool and wadding.
The resin or the like and the wadding or its equivalent offer a great resistance
to the penetration of sharp objects and the wadding also forms a yielding cushion
for the air tube.
To protect the air tube from injury by rubbing the finest silk is used for sewing
and the cloth casing is coated with talc.
Such a protective insertion in the form of an annular closed band of a suitable
size for the tyre is easy and cheap to make and can be inserted with facility
between the inflating tube and the tyre cover (as shown in Figs. 3 and 4) where
as already described it forms owing to its impenetrability and softness a puncture
resisting shield and also a soft cushion for the inner tube.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
A protecting shield or insertion a between the inflating tube c and the cover li

page_text: of a pneumatic tyre consisting of two strips of cellular cloth linen woollen
cloth or felt dd coated with resin soapstone or the like lying between layers or
packings of wadding wool or other soft material e and sewed up in a cloth casing fi
substantially as set forth.
Dated this 30th day of September 1899
T. WHITELOW, A.M.Inst.C.E.,
70, Deansgate Manchester,
Agent for the Applicants.