Improvements in Pneumatic Wheels, or Wheels having Pneumatic Tyres.
Year: 1894

page_text: Date of Application, 14th Sept., 1894
Complete Specification Left, 14th June, 1895-Accepted, 20th July. 1895
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Wheels, or Wheels having Pneumatic
Tyres.
I FRANK KING of 4 Great Winchester Street, in the City of London, Engineer
do hereby declare the nature of my invention to be as follows:-
My invention relates to pneumatic wheels or wheels having pneumatic tyres
and has for its object to protect the air chamber against abrasion or nipping in
consequence of the movement of the flexible portions when inflated.
When inflation is carried to a high degree (say 100 to 200 lbs. pressure per
square inch) the air chamber in pneumatic wheels or pneumatic tyres is forced into
every available crevice and the result of the necessary movement of the flexible
portions of the wheel is to crush, nip, or tear portions of the air chamber which
may be forced into the said crevices.
According to my invention I employ a stopping of canvas or other equivalent or
suitable material which is made as nearly as possible to fit the crevices into which
the air chamber would otherwise be forced. I then superpose on the canvas or
the like a piece of rubber or equivalent material of sufficient dimensions to cover the
line of junction between the crevice and its aforesaid stopping and feathered off
or reduced towards the edges, and which, under pressure, will fill in the remaining
crevices, leaving the air chamber only to adapt itself to the resulting gentle curves,
and thus removing the possibility of damage."
I may use in place of, or in addition to, the canvas or like stopping metallic
wire netting covered with canvas or the like.
Dated this 14th day of September 1894.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Wheels, or Wheels having Pneumatic
Tyres.
1 FRANK KING of 4 Great Winchester Street in the City of London, Engineer,
do hereby declare the nature of my 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 pneumatic wheels or wheels having pneumatic tyres and
has for its object to protect the air chamber against abrasion or nipping, in con-
sequence of the movement of the flexible portions when inflated.
When inflation is carried to a high degree (say 100 to 200 lbs. pressure per
square inch) the air chamber in pneumatic wheels, or pneumatic tyres, is forced
into every available crevice, and the result of the necessary movement of the
flexible portions of the wheel is to crush, nip, or tear, portions of the air chamber
which may be forced into the said crevices.
According to my invention I employ a stopping of canvas, or other equivalent,
or suitable material, which is made as nearly as possible to fit the crevices into

page_text: which the air chamber would otherwise be forced. I then superpose on the canvas,
or the like, a piece of rubber, or equivalent material, of sufficient dimensions to
cover the line of junction between the crevice and its aforesaid stopping, and
feathered off, or reduced, towards the edges which rubber or the like when under
pressure will fill in the remaining crevices leaving only the resulting gentle curves
for the air chamber to adapt itself to and thus removing the possibility of damage
to the air chamber.
I may use, in place of or in addition to, the canvas or like stopping, metallic
wire netting covered with canvas or the like.
In order that the manner in which my invention may be performed may be well
understood I have shewn in Figures 1 and 2 of the accompanying drawings
sections of two forms of tyre to which my invention is applied.
In both figures A represents the rim of the wheel, B the expausible air chamber
and C its covering and D represents the tread or hard rubber part of the wheel.
E represent gaps. which it is the object of my invention to prevent causing injury
to the material of the air chamber B. F represents the herein before described
stopping material which may be made of canvas, or metallic wire netting (or both)
in combination with india-rubber or equivalent material with its edges reduced, or
feathered off, so as to lie close between the air chamber B and its covering C
without objectionable projection.
When the invention is applied to pneumatic wheels the stopping will be similarly
adapted to the periphery of the hub.
Having now particularly described: and ascertained the nature of my inven-
tion and in what manner: the same is to be performed I declare that what I
claim is :-
The combination with pneumatic wheels or wheels having, pneumatic tyres of a
stopping formed and applied, substantially as and for the purpose. herein before
described:
Dated this 14th day of June 1905
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.