Improvements in Tyres for Wheels.
Year: 1897

page_text: Date of Application, 3rd Dec., 1897--Accepted, 29th Jan., 1898
Improvements in Tyres for Wheels.
I, GEORGE HENRY MACKAY, of Salem Depôt, County of Rockingham, Stato of
New Hampshire, U.S.A., Inventor, 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:-
The object of this invention is the production of a light, yielding, durable and
practically puncture proof tyre adapted for the wheels of carriages wagons and
velocipedes.
In the accompanying drawing Fig. 1 is a longitudinal section of one form of
tyre of this invention. Fig. 2 the same in cross section. Fig. 3 a longitudinal
section of another form of tyre of the invention. Fig. 4 the same in cross section.
Fig. 5 a sectional perspective view of a detail.
a is a tube of any suitable material which is secured to the rim b by any suitable
known means.
c is a semicircular pneumatic tube occupying the inner half of
the tube a, and ct cork blocks or other equivalent light material fitted in the outer
half of the tube a and serving to protect the air compartment c. e is a long strip
of canvas or the like of a width equal to the internal diameter of the tube a and
upon this strip are cemented the flat faces of the cork blocks. The compartment c
is designed to be influted and when the tyre passes over a stone or other obstruction
the cork blocks have a limited yielding movement relatively to one another.
The side faces of the cork blocks converge towards the centre of the wheel.
Referring to Figs. 3, 4, 5, a partition is provided instead of the semicircular
tube for dividing the tube a into two compartments. In forming a tyre of this
kind the cork is placed upon the open material of the tube a, in a grooved mould
or matrix, the flat faces of the cork covered with cement, a stripe of canvas or the
like laid thereon and carried round the cork blocks so as to completely envelope
them, the edges f¹ of the partition c then firmly cemented to the material of tho
tube a and this material bent to form a tube the edges of which are secured
together.
By having the edges fi of the partition projecting inwardly towards the centre
of the wheel, the greater the pressure of the air pumped into the pneumatic com-
partment, the more tightly are the edges f¹ bound against the inside of the tube a.
The canvas serves to maintain the cork blocks in position and these blocks may be
easily inserted and removed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to he performed, I declare that what
I claim is:-
1. A wheel tyre formed of an enclosing tube having its longitudinal edges
brought together and united, a partition dividing said tube into two compartments
and having its edges secured to the inside of said tube and cork blocks having
converging flat faces and placed in the outer compartment of said tube, the inner
compartment of which is inflatable, substantially as described and shewn.
D

page_text: 2. The general arrangement and combination of parts constituting the wheel
tyre, substantially as described and shewn.
Dated this 3rd day of December 1897.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicant.