Improvements in Pneumatic Tyres for the Wheels of Cycles and other Vehicles.
Year: 1897

page_text: Date of Application, 13th Sept., 1897
Complete Specification Left, 2nd Nov., 1897-Accepted, 11th Dec.,
1897
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres for the Wheels of Cycles and
other Vehicles.
I, ROBERT MC.ALLISTER, of Lawhill, Dollar, in the County of Clackmanan, N.B.
Coal master. do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in pneumatic tyres for the wheels of
cycles and other vehicles and has for its object to prevent the inner air tube from
entirely collapsing in the event of a puncture. This I effect by filling the air
tube with cork so that when there is a puncture and the air escapes the wheel
bears upon the cork and gives sufficient support to enable the rider to reach home.
The cork may be inserted in round cylindrical pieces to fit the size and shape of
the air tube. To prevent the air tube being damaged, when there is a puncture
and the wheel is hearing on the cork, I may cover the cork with any suitable soft
material such as hair.
In lieu of cork I may use any analagous material to cork such as a material made
of hair or the like.
Improvements in Pneumatic Tyres for the Wheels of Cycles and
other Vehicles.
I, ROBERT MCALLISTER, Lawhill, Dollar, in the County of Clackmanan, North
Britain, Chal Master. 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:-
This invention relates to improvements in pneumatic tyres for the wheels of
cycles and other vehicles and consists in providing the inside of the air tube with
a core or lody of cork for the purpose of supporting the tyre in the event of the
air tube getting punctured.
The drawing illustrates the method of carrying out my said invention; the tyre
in the drawing being shewn fully inflated.
The cork body A is formed of cork segments, which may be of an oval shape, as
shewn, which are strung on a rubber or other elastic cord B. The cork segments
are preferably enclosed within an Indiarubber tube or covering a; elasticity being
required to keep the tyre of cork at the bottom of the air tube close to the rim and
Price 8d 1

page_text: also to allow of the string of corks being drawn over the side of the rim when the
air tube is taken up to repair punctures.
The said cork segments are of such a size, as shewn, relatively with the air tube C
and outer cover D as to allow plenty of room for the ordinary depression of the
tyre when travelling or when not fully inflated.
It will be seen that in the event of the tyre getting deflated by reason of a punc-
ture, the rim of the wheel is kept from contact with the ground through the
intervention of the cork A which will enable the rider to proceed on the road
without having to dismount.
The cork segments may be held together by either an elastic core or an elastic
covering; or by means of both as in the drawing..
In lieu of solid cork being used, I may use cork dust, or its equivalent, filled
into the covering or tube a.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be. performed, I declare that what I
claim is:
1-
1. The improvements in penumatic tyres for cycles and other vehicles in order
to support the same when punctured.
2. The core or body of cork A, or analagous material, inserted within the air
tube, substantially in the manner as and for the pose as hereinbefore described
and shewn in the accompanying drawing.
Dated this 25th day of tahan 100%
JOHNSONS,
Applicant's Agents, 115, St. Vincent Street, Glasgow.