Improvements in Armours for Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 22nd Oct., 1897-Accepted, 30th July, 1898
COMPLETE SPECIFICATION.
Improvements in Armours for Pneumatic Tyres.
We, RUDOLP FAAS and PETER REDER, Machinists, both residing at 161, La Talle
Street, in the City of Chicago, County of Cook, State of Illinois, United States of
America, 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 :-
Our improvement relates to that class of pneumatic tires which is composed of an
outer casing, an inner inflatable tube and a means for protecting the inner tube from
injuries incident to puncture. Our objects are to provide an impenetrable armor
between the inner tube and the tread of the outer casing, that is resilient and
yielding, and which will add to the strength and wear resisting qualities of the
tire.
The device is illustrated in the accompanying drawings, in which;
Fig. 1 is a cross section of the tire containing the armor.
Fig. 2 is a plan view of the armor.
Fig. 3 is a view of two sections of the armor separated.
Fig. 4 is a plan view of the material composing the armor.
Similar numerals and letters refer to similar parts throughout the several views.
The material for our improved armor is manufactured as follows: we take a textile
fabric, preferably of closely woven linen or silk, thin sheets of rubber or caoutchouc
and paper of a fine, tough fibre; these are then laid together and united in the
following order: first a piece of the silk or linen fabric 1. On this is laid a thin
sheet of caoutchouc 2, then the sheet of paper 3; on the paper is placed a second
sheet of caoutchouc 4, on the top of this a second piece of the fabric 5. The five
pieces are subjected to heat sufficient to dissolve or liquify the caoutchouc,
then by great pressure the whole is cemented compactly and evenly into one firm
piece.
The two sheets of caoutchouc between the paper and the linen fabric unites the
paper and the fabric, producing a material that is not affected by moisture, that has
a firm body and of great resisting qualities.
This material manufactured as described is then cut into strips about two inches
wide and six inches long, from which the armor is constructed. These strips are
slit longitudinally as 77 and again cut transversely as 66 at intervals of about two
inches. The longitudinal slits 77 are about one inch in length and about a half inch
from the edges, leaving a central strip about one inch wide; the edges are then cut
transversely at the center of the longitudinal slit, making openings for the purpose
of permitting the second strip similarly cut to slide therein. The ends of the six
inch strips are cut longitudinally about half an inch as 8 8. The six inch strips A
and B are then placed together so that the strip A overlaps the strip B about half its
length, and other similar strips are added consecutively until the required length
of the armor is obtained. The strips A and B slide into each other through the
transverse openings 66 which overlap the uncut portion 9 9 of the connecting
overlapping strip, thus doubling and splicing the material in a manner to permit

page_text: The ends
the whole to yield or expand slightly longitudinally under a strain.
of the completed armor are then similarly joined together to encircle the tire.
The armor, constructed as above described, is then enclosed in a separate casing of
cotton flannel, or similar soft fabric, and then fitted snugly on the tread of the inner
tube D between the inner tube and outer casing E.
The armor constructed of the material and manner described is impenetrable and
yet yielding, of great wear resisting qualities and light as to weight. It will expand
longitudinally under pressure, yield in meeting an obstruction and resume its normal
condition when the obstacle is passed.
As a modification Fig. 5 shows the armor placed on the tread of the tire, when it
may be necessary to apply it to a tire, composed of a single inflatable tube. In this
position the armor is enclosed in a light rubber casing and the casing cemented to
the tire.
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 :-
1. A material for an armor for pneumatic tires, composed of two thicknesses of
closely woven fabric, with paper between and firmly united together by means of
thin sheets of caoutchouc placed between the paper and the fabric subjected to heat
and pressure, substantially as and for the purpose specified.
2. An armor for pneumatic tires composed of the material described, cut into strips
two inches wide and six inches long, and by means of longitudinal slits and transverse
openings permitting them to be joined together consecutively by inserting the parts
of one strip into the openings of the other and overlap to produce two thicknesses of
the material, substantially as and for the purpose specified.
3. An armor for paeumatic tires composed of a material made of two pieces of
closely woven fabric with paper between, united firmly together by means of thin
sheets of caoutchouc placed between the two sides of the paper and the fabric subjected
to heat and pressure; the material cut into strips two inches wide by six inches long,
the strips slit laterally one inch, at intervals of two inches and transversely on each
side of a central strip to permit the parts of one to be inserted into the openings of
the other. and overlap to double the thickness of the strips, substantially as and for
the purpose specified.
Dated this 21st day of October 1897
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Patent Agents