An Improved Elastic Tyre.
Year: 1890

page_text: Date of Application, 10th May, 1890
Complete Specification Left, 6th Mar., 1891-Accepted, 11th Apr., 1891
PROVISIONAL SPECIFICATION.
An Improved Elastic Tyre.
ARTHUR WILLIAM MURRAY, Barrister, 1, Lincoln Place, Dublin, do hereby
declare the nature of this invention to be as follows:-
The invention consists of a tubular core of clastic steel web suitably encased in
rubber or a combination of rubber & canvass or other suitable like material.
Dated this 9th day of May 1890.
ARTHUR WM. MURRAY.
COMPLETE SPECIFICATION.
An Improved Elastic Tyre.
ARTHUR WILLIAM MURRAY, 1, Lincoln Place, Dublin, Barrister-at-Law,
M.A.T.C.D., 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 has for its object the production of an elastic or anti-vibration tyre
for wheels which will lessen the shock or vibration caused by the wheel passing over
rough obstacles on the roadway especially those of small size but rugged in shape
such as ordinary road metal, gravel.
The tyre is formed by a combination of a tube of rubber H & K Fig. 4 or similar
material with the spring core 1 Fig. 4 hereinafter described which is the special
feature of this invention.
This core 1 Fig. 4 inay be enclosed in a tube lie between two or be embedded
in one.
The method of forming it is as follows: the material being either wire or ribbon
made of steel or other material possessing like recuperative or spring qualities.
When made of wire or narrow ribbon right handed spirals of very high pitch A
Fig. 1 are interwoven with left handed spirals of the same pitch B Fig. 1 so as to
form a network tube. The tendency to stretch is obviated by giving a spiral set
to the wire or ribbon previous to or cotemporaneous with the weaving or by inter-
weaving longitudinally a strong spiral spring of small diameter L Fig. 4 through
the meshes of the large tube or core.
When made of broad ribbon Fig. 2 for choice the breadth is about three
diameters of proposed core. This broad ribbon is however pierced by longitudinal
slits DE Figs. 2 & 3 the length of which for choice being one such diameter.
These slits are so arranged that the strips C Fig. 2 & 3 into which they divide the
ribbon are about one sixth or one eighth of such diameter broad and the ends of the
slits lie athwart the broad ribbon at such an angle that when the broad ribbon is
coiled right handed to form a tube the unpierced portions of it D. Fig. 2 & 3 form
strips D Fig. 3 running in spirals reverse to but of the same pitch and width as
those formed by the longitudinal strips C Fig. 3.
By means of these high pitched spirals I obtain an arch very flat as compared to
that formed by cross section of the tube or core and thus the springs are not
subjected to any very strain or twist even if the tube be flattened and they may
therefore be of reasonably low temper and get perfectly recuperative while the
combination with the reverse spirals gives them great resisting power with regard
to side wrenches and also tends to keep the springs while bending in the plain of
the arch they form when in the normal condition.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that
what I claim is :-
The method of imparting elasticity to a tyre by combining with a flexible tube
an arrangement of very skew arelies of a spring material thus obtaining great 5
recuperative power by reason of low convexity while at the same time lateral
stability is secured by reason of combination with reverse skew arches.
Dated this 5th March 1891.
ARTHUR WM. MURRAY.