Improvements in and connected with Tyres for Carriage, Cart, and Trolly Wheels.
Year: 1892

page_text: Date of Application, 18th May, 1892
Complete Specification Left, 18th Feb., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in and connected with Tyres for Carriage, Cart, and
Trolly Wheels.
I, JOHN COCKBURN, Superintendent to the North British Rubber Company
(Limited) Castle Mills, Edinburgh, do hereby declare. the nature of this invention
to be as follows:-
This invention relates to tyres for carriage, cart, trolly and similar wheels of the
class in which rubber or rubber compound is employed as the treading surface and
it has for its object the provision of simple and inexpensive means for attaching the
rim and tyre to the felloe of the wheel:
Under this invention a tyre of rubber or rubber compound is combined with a
rim of iron or other metal which latter is made in the form of a hoop or ring
having an external circumferential central web or projection. The rubber tyre is
vulcanised on to this rim and is prevented from slipping sidewise should it become
partially detached by the central web which is also used to prevent sidewise
movement on the felloe of the wheel by partially cutting the web at intervals and
driving it by means of a punch entered through orifices in the rubber tyre into a
groove or recess cnt or turned in the felloe. Circumferential slip of the rim is
prevented by means of a cross strap or straps secured to the inside of the rim at
suitable intervals and entered in a corresponding recess or recesses formed in the
felloe. The metal rim or hoop may if required have side flanges to assist in holding
the rubber tyre.
Dated this Seventeenth day of May 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in and connected with Tyres for Carriage, Cart, and
Trolly Wheels.
I, JOHN COCKBURN, Superintendent to the North British Rubber Company
(Limited) Castle Mills, Edinburgh, 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 tyres for carriage, cart, trolly and similar wheels of the
class in which rubber or rubber compound is employed as the treading surface and
it has for its object the provision of simple and inexpensive means for attaching the
rim and tyre to the felloe of the wheel.
Under this invention and as represented in the accompanying drawings in
longitudinal section at Figure 1 and in cross section as at the lines 2-2 3-3 and
4-4 at Figures 2, 3 and 4 respectively, a tyre A of rubber or rubber compound is
combined with a rim B of iron or other metal which latter is made in the form of a
hoop or ring having an external circumferential central web or projection b. The
rubber tyre A by preference composed of an outer layer of soft rubber united to an
inner layer of vulcanite or hard rubber A¹ which is vulcanised on to the rim B and
is prevented from slipping sidewise should it become partially detached by the
central web b which is also used to prevent sidewise movement on the felloe or iron
tyre C of the wheel by partially cutting the web b at intervals and driving it by
means of a punch entered through orifices d in the rubber tyre into a groove or
recess c cut or turned in the felloe or iron tyre C. Circumferential slip of the rim
ГР 921

page_text: is prevented by means of a cross strap or straps E secured to the inside of the rim
at suitable intervals and entered in a corresponding recess or recesses e formed in
the felloe or iron tyre C. The metal rim or hoop B may if required have side
flanges to assist in holding the rubber tyre.
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 :-
A wheel tyre composed of a rubber tread vulcanised on to a metallic rim and
secured to the felloe or iron tyre of the wheel substantially as described.
Dated this 17th day of February 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.