Improvements in Rubber Tyred Wheels.
Year: 1890

page_text: Date of Application, 9th Aug., 1390
Complete Specification Left. 8h May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Rubber Tyred Wheels.
I, Joux COCKBURN, Assistant Manager 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 rubber tyred wheels more particularly such as are
applied to barrows, trucks and trollies for use on railway platforms, and the
improvements have for object to provide for easily and effectively putting on and
retaining the outside rubber tyres on such wheels. Hitherto rubber tyres have
been attached to iron wheels by vulcanizing them on to the wheels or to the outside
metal tyres thereof which can be done very effectively at an india rubber mann-
factory but for this purpose the wheels must be sent thereto for each renewal which
is usually very inconvenient, and to obviate this the rubber tyres are often put on
wheels with their peripheries grooved to receive them when stretched and passed
over the flanges or sides of the grooves. This, chiefly by reason of the rubber
tyres stretching by rolling under the loads put on them, is a very defective and
unsatisfactory mode of putting on such tyres and my invention is designed to
obviate these objections and secure simplicity and efficiency of application in any
locality and without sending the wheels to rubber works.
In carrying out iny invention I make the metal wheels in two or more pieces
jointed together at right angles to the axis the wheels being split either entirely
through the hub arms and rim to form two wheels or through the arms and rim
only the entire hub forming one of the halves of the wheel.
The rubber tyre which is preferably composed of an inner layer of hardened
rubber or vulcanite and an outer layer of softer rubber is then fitted on the divided
rim and the two portions of the wheel bolted together to clasp and securely hold
the tyre in place the rim being flanged or formed with undercut grooves the better
to retain the rubber tyre.
Dated this Eighth day of August 1890.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Rubber Tyred Wheels.
I, JOHN COCKBURN, Assistant Manager 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 he particularly described and
ascertained in and by the following statement :——
This invention relates to rubber tyred wheels more particularly such as are
applied to barrows, trucks and trollies for use on railway platforms and the
improvements have for object to provide for easily and effectively putting on and
retaining the outside rubber tyres on such wheels. Hitherto, rubber tyres have
been attached to iron wheels by vulcanizing them on to the wheels or to the outside
metal tyres thereof which can be done very effectively at an india rubber manu-
factory but for this purpose the wheels must he sent thereto for each renewal
which is usually very inconvenient, and to obviate this the rubber tyres are often
put on wheels with their peripheries grooved to receive them, when stretched and
passed over the flanges or sides of the grooves. This, chiefly by reason of the

page_text: rubber tyres stretching by rolling under the loads put on them is a very defective
and unsatisfactory mode of putting on such tyres, and my invention is designed to
obviate these objections and secure simplicity and efficiency of application in any
locality and without sending the wheels to rubber works.
As represented in vertical section and elevation at Figures 1 and 2 of the
accompanying drawings, I make the metal wheels in two or more pieces A. A,
jointed together at right angles to the axis the wheels being split either entirely
through the hub A₁ arms a and rim a to form two wheels as indicated by the
dotted lines or as shown in full lines through the arms and rim only, the entire
hub A fonning one of the halves of the wheel. The tyre B B which may be
formed of rubber of one uniform consistency or hardness throughout or with a
layer or layers of harder rubber or of textile fabric or wire cloth coated with
indin rubber, or of fibrous rubber material, (the construction of either of which is
well known) and an outer layer of softer rubber is then fitted on the divided
rim a', and the two portions of the wheel bolted together to clasp and securely
hold the tyre in place, the rim a' being flanged or formed with undercut grooves a²
the better to retain the rubber tyre.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
A truck, trolly or barrow wheel made in two or more pieces as described and
having an india rubber tyre constructed substantially as described.
Dated this Seventh day of May 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.