An Improvement in Pneumatic Tyres for the Wheels of Bicycles, Tricycles, and other Velocipedes and Wheel Carriages.
Year: 1891

page_text: Date of Application, 28th July, 1891
Complete Specification Left, 20th Apr., 1892-Accepted, 29th May, 1892
PROVISIONAL SPECIFICATION.
An Improvement in Pneumatic Tyres for the Wheels of Bicycles,
Tricycles, and other Velocipedes and Wheel Carriages.
I EDWARD LYCETT 115 Kingston Road Birmingham Commercial Traveller do
hereby declare the nature of this invention to be as follows:-
A layer of cork or other like substance secured to the rim by cement & canvas,
this to be a bed for the air tube which prevents punctures to the air tube from the
inside (by not allowing two hard substances to come together such as a stone & the
steel rim) by such hard substances as a stone from the outside pressing hard on to
the rim when coming in contact by force.
The air tube to be secured with a bag of canvas & this covered again with a
rubber case or shell into which is manufactured a wire gauze made to stretch and
still fine enough to prevent puncture to the air tube by the tyre coming in contact
with a thorn or other sharp substance.
Dated this 27th day of July 1891
EDWARD LYCETT.
COMPLETE SPECIFICATION.
An Improvement in Pneumatic Tyres for the Wheels of Bicycles,
Tricycles, and other Velocipedes and Wheel Carriages.
I EDWARD LYCETT, of No. 115 Kingston Road Birmingham, Commercial Traveller
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 consists of the improvement hereinafter described and illustrated
in the accompanying drawing in pneumatic tyres for the wheels of bicycles tricycles
and other velocipedes and wheel carriages.
My said invention has for its object to prevent the puncturing of or injury to
the air tube of the pneumatic tyre by the passage or travelling of the said tyre
over a stone or other hard substance. In such case the flattened air tube being
pressed forcibly between the said stone or other hard substance and the steel or
metallic rim of the tyre may result in the puncturing of or injury to the said air
tube and the consequent collapsing of the said air tube and probable accident to
the rider.
This I prevent by interposing between the outer or concave face of the steel rim
of the pneumatic tyre and the air tube of the said tyre, a layer or lining of cork
or other soft or yielding substance such as felt or woollen cloth. By the use of
the said cork or other layer or lining a protecting bed is formed between the air
tube and steel rim, on which yielding bed on the occurrence before referred to, the
impact or force of the stone or other hard substance spends itself, and the cutting
or puncturing of the air tube is thereby prevented. The protecting bed, layer or
covering of cork or other soft and yielding material is preferably secured to the
steel rim by india rubber cement alone or in conjunction with canvas.
Figure 1 of the accompanying drawing represents in cross section an inflated
pneumatic tyre provided with my invention and
Figure 2 represents in cross section and plan the hollow steel rim of the tyre
detached the said rim being provided with a bed, layer or covering of cork or
other soft or yielding material.
a is the hollow steel rim covered on its outer or concave face with the bed or

page_text: layer or covering of cork or other soft and yielding material marked b; c is the
inner or air tube of the pneumatic tyre made of india rubber, the part c² adjacent
to the rim a being stronger or thicker than the other part of the said air tube.
Around the air or internal tube c, c² and rim a and between the bed, layer or
covering b and the part c³ of the air tube is a layer or covering of canvas d;
e is the outer protecting india rubber tube or case of the tyre the edges of which
tube or case are joined under the rim by the strip of canvas f.
It will be understood by an examination of the drawing and from the description
hereinbefore given how when the air tube c is in its compressed or flattened state it
is protected from being punctured or injured, on the travelling of the tyre over a
stone or other hard substance, by the cork bed, layer or covering b. Besides
preventing the puncturing of or injury to the air tube under the circumstances
hereinbefore mentioned the said protecting cork bed, layer or covering b also
prevents the air tube coming in contact with and being cut or injured by the edges
of the steel rim a.
Although I have only described and represented my invention in combination
with a pneumatic tyre of the Dunlop type yet I wish it to be understood that my
invention may be applied to pneumatic tyres generally for the purposes described,
whether the said tyres be provided with solid or hollow rims or trough rims.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that I claim as my
invention of "An improvement in pneumatic tyres for the wheels of bicycles
tricycles and other velocipedes and wheel carriages" ;-
-
The addition to or combination with the outer face of the steel or metallic rims
of pneumatic tyres of a bed or layer or covering of cork, felt, woollen cloth or other
soft and yielding material for the purposes and substantially as hereinbefore
described and illustrated in the accompanying drawing.
Dated the Nineteenth day of April 1892.