Improvements in or connected with, Pneumatic Tyres, and Wheels having Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 26th Feb., 1896
Complete Specification Left, 26th Nov., 1896-Accepted, 6th Feb., 1597
PROVISIONAL SPECIFICATION.
Improvements in or connected with, Pneumatic Tyres, and
Wheels having Pneumatic Tyres.
I FRANK KING of 4 Great Winchester Street in the City of London Engineer
lo hereby declare the nature of this invention to be as follows:-
When pneumatic tyres as hitherto constructed are put under pressure the embedding
of the air chamber in any crevice which may be left by irregularity of shape of
the tyre and its support, usually results in the puncture of the tyre by the nipping
action which takes place on movement and alteration in. shape when the wheel is
in work. The object of my invention is to obviate this defect and to provide a
pneumatic tyre capable of standing very high degrees of pressure of inflation
without putting objectionable strain on the outer covering of the tyre.
In a pneumatic tyred wheel constructed according to my invention. I employ for
securing the outer covering. of the tyre metal rings at the edges of a combined}
canvas and rubber covering to form that portion of the tyre which is. in contact
with the road, but instead of placing the air chamber directly inside this, and in
contact with the felloe of the wheel, I construct a canvas tube of sufficient strength
to resist any degree of inflation which may be necessary, and inside this canvas
tube 1 put a rubber air chamber. This air chamber and its canvas tube are
situated in the space between the outer covering and the felloe; and may be inflated
in the usual manner, but the said space is of such capacity that the strain or the
main portion of the strain due to inflation is borne by the canvas tube of the air
chamber and not by the outer covering. The said outer covering is. held in place
by the metal rings (enclosed in the canvas and rubber at the edges of the covering)
entering grooves formel in opposite faces of two rings secured by cross bolts or
otherwise to each side of the rim of the wheel the said grooves being so formed,
that whilst they retain the covering, they do not, when the tyre is inflated, present
any other portions to come into contact with the said covering.
The canvas tube enclosing the rubber tube of the air chamber is preferably
woven somewhat loosely and is made somewhat longer than the circumference of
the rubber tube and when the rubber tube is in place the one end of the canvas
tube is inserted into the other end of itself, and then, when the air chamber is
inflated, the canvas tube is held in place and constitutes a support for the rubber
tube without any securing or other connection of the ends of the canvas tube
together, being needed.
CL101C
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in or connected with Pneumatic Tyres, and
Wheels having Pneumatio Tyres.
I, FRANK KING, of 4 Great Winchester Street, in the City of London,
Engineer, 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 sintoment:-
When pneumatic tyres ns hitherto constructed are put under pressure the embedding
of the air chamber in any crevice which may he left by irregularity of shape of
the tyre and its support, usually results in the puncture of the tyre by the uipping
action which takes place on movement and alteration in shape when the wheel is
in work. The object of my invention is to obviate this defect and to provide a
pneumatic tyre capable of standing very high degrees of pressure of inflation without
putting objectionable strain on the outer covering of the tyre.
I will describe my invention and the manner in which it is to be performed by
reference to the accompanying drawings. Figure 1 shows in cross section a portion
of a tyre and wheel constructed in accordance with my invention.
In a pneumatic tyred wheel constructed according to my invention I employ,
for securing the outer covering of the tyre, the usual well known metal rings Ant
the edges of a combined canvas and rubber covering B to form that portion of
the tyre which is in contact with the road, but instead of placing the air chamber C
directly inside this and in contact with the felloe D of the wheel, I construct a
canvas tube E of sufficient strength to resist any degree of inflation which may be
necessary, and inside this canvas tube I put the rubber air chamber C. I have
shewn this canvas tube in elevation in Figure 2 and in sections at right angles to
each other and with the air chamber C inside in Figures 3 and 4. This air chamber C
and its canvas tube E are situated in the space between the outer covering B and
the felloe D and may be inflated in the usual manner, but the said space is of such
capacity that the strain, or the main portion of the strain, due to inflation is horno
by the canvas tube of the air chamber and not by the outer covering B. The said
outer covering B is held in place by the metal rings A (enclosed in the edges of the
canvas and rubber outer covering B) entering grooves formed in opposite faces of
two rings F and G secured by cross bolts and nuts or otherwise, to each side of
the rim of the wheel, the said grooves being so formed, that whilst they retain the
covering B, they do not, when the tyre is inflated, prosent any other portions to
come into contact with the said covering B.
The canvas tube E enclosing the rubber tube C constituting the air chamber is
preferably woven somewhat loosely and is made somewhat longer than the circum-
ference of the rubber tube C, and when the said rubber tube or air chamber is
completo and in place, the one end of the canvas tube E is inserted into the other end
of itself as shown in Figures 2 and 3 and then when the air chamber C is inflated,
the canvas tube E is held in place and constitutes a support for the rubber tube or
air chamber C without any securing or other connection of the ends of the canvas
tube together, being needed.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what
I claim is :
1. The combination with pneumatic tyred wheels of a canvas tube situated between
the air chamber and the outer covering and felloe substantially as and for the
purpose herein before described.

page_text: 2. In or for a pneumatic tyre a canvas tube containing the air chamber the one
end of the said canvas tube being placed within the other end of the said tube
substantially as and for the purpose hereinbefore described.
3. The arrangement and combination of parts constituting a pneumatic tyred
wheel substantially as hereinbefore described and shewn in Figure 1 of the accom-
panying drawings.
Dated this 26th day of November 1896
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.