Improvements in or relating to Pneumatic Tyres.
Year: 1894

page_text: Date of Application, 5th Apr., 1894
Complete Specification Left. 4th Feb.. 1895-Accepted, 23rd Mar., 1895
Improvements in or relating to Pneumatic Tyres.
I, HENRY JELLEY, of 2 North Street, Wandsworth, in the County of Surrey,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to the covers of pneumatic tyres adapted to enclose or
cover a separate and removable air tube, and it consists in coating the inner face
of the cover with a composition, the object being to prevent friction between it and
the air tube.
According to my invention I coat the inner surface of the cover of the tyre-
which is usually the reinforcing canvas or lining-with a composition consisting of
French chalk or any suitable cognate substance held in solution by any suitable
adhesive liquid. This composition is applied to the canvas forming the inner
surface of the cover of the tyre either before the outer rubber tread is fixed thereto,
or afterwards, as found most couvenient, and it may either be applied by hand by
means of a brush, or in any other suitable and convenient manner.
A suitable adhesive liquid for carrying the French chalk or cognate substance
is the ordinary rubber solution used in the construction of pneumatic tyres as it
has the advantage of rapidly evaporating or drying and of remaining flexible when
dry. I wish it however to be understood that I do not limit myself to the use of
rubber solution as the liquid for carrying the French chalk or its equivalent as a
plastic varnish or waterproof glue will answer the purpose perfectly.
Dated this 5th day of April 1894.
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
Improvements in or relating to Pneumatic Tyres.
I, HENRY JELLEY, of 2 North Street, Wandsworth, in the County of Surrey,
Cycle Manufacturer, 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 :-
My invention relates to the covers of pneumatic tyres adapted to enclose or
cover a separate and removable air-tube, and it consists in coating the inner face
of the cover with a composition, the object being to prevent friction between it
and the air-tube.
According to my invention I coat the inner surface of the cover of the tyre-
which is usually the reinforcing canvas or lining-with a composition consisting of
French chalk or any suitable similar substance held in solution by any suitable
adhesive liquid. This composition is applied to the canvas forming the inner
surface of the cover of the tyre either before the outer rubber tread is fixed thereto.
or afterwards, as found most convenient, and it may either be applied by hand by
means of a brush, or in any other suitable and convenient manner.

page_text: A suitable adhesive liquid for carrying the French chalk or similar substance is
the ordinary solution of rubber in naphtha, bi-sulphide of carbon or other solvent,
such as is used in the construction of pneumatic tyres as it has the advantage of
rapidly evaporating or drying and of remaining flexible when dry. I wish it
however to be understood that I do not limit myself to the use of rubber solution
as the liquid for carrying the French chalk or its equivalent as a mixture of the
chalk or the like with sufficient plastic varnish or waterproof glue to form a paste
will answer the purpose perfectly.
I have found that a suitable composition according to this invention is produced
by the admixture of French chalk or a similar substance such for instance as
powdered mica with such a weight of rubber solution plastic varnish or the like as
is needed to give the composition the consistence of cream. But I do not limit my
invention to the proportions here stated.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;-
1. A composition produced by the admixture of French chalk or a similar
substance with rubber solution substantially as and for the purpose described.
2. A composition produced by the admixture of French chalk or a similar
substance with a plastic varnish or a waterproof glue substantially as and for the
purpose described.
3. In a pneumatic tyre a flexible layer of lubricating composition substantially
as described.
4. Coating the inner face of the cover of a pneumatic tyre with a lubricating
substance for the purpose described.
5. The use of the composition described for reducing friction in a pueumatic
tyre.
Dated this 4th day of February 1895.
HENRY JELLEY
HENRY
JELLEY
Boalt & Wade,
Agents for the Applicant.