Improvements in Rims and Elastic Tyres for the Wheels of Vehicles.
Year: 1895

page_text: Date of Application, 12th July, 1895.
Complete Specification Left, 11th Apr., 1896-Accepted, 16th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Rims and Elastic Tyres for the Wheels of
Vehicles.
We, RUPERT ROBINSON, of Broomfield House, Dore, in the County of Derby,
Manager, and WILLIAM ISAAC SMITH, of 17 Fairhead Road, in the City of
Sheffield, Secretary, do hereby declare the nature of our invention to be as
follows:-
Our invention relates to the construction of an elastic tyre for cycles and other
vehicles, consisting of a metallic rim of peculiar construction, and an outer ring of
rubber.
We propose to construct the metallic rim, which is secured to the spokes by
ordinary means, of sheet steel, the edges being bent over towards each other to give
it a tubular form. Each edge is serrated or shaped into equidistant fingers and
spaces, and when bent over as before described, the fingers of one edge pass into
the spaces of the other edge with sufficient working clearance.
This articulated junction of the edges forms what may be termed the tread, and
it is upon this part that the rubber ring or tyre proper is placed, a suitable flat or
recess being provided in bending the steel, to form a protection for the edges of the
rubber.
It will thus be seen that the rubber is supported upon an elastic steel rim or
under tyre, which may either be made of steel of a temper that will not require either
hardening or tempering, or it may be submitted to those processes if desirable.'
Dated the 6th day of July 1895.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.
Improvements in Rims and Elastic Tyres for the Wheels of
Vehicles.
We RUPERT ROBINSON of Broomfield House, Dore in the County of Derby,
Manager, and WILLIAM ISAAC SMITH of 17 Fairhead Road in the City of
Sheffield Secretary, do hereby declare the nature of this invention and in what
manner the same has to be performed, to be particularly described and ascertained
in and by the following statement :-
Our invention relates to the construction of an elastic tyre for cycles and other
vehicles and it consists of a metallic elastic rim of peculiar construction to be used
with an outer ring of rubber or the like.
The invention is illustrated in the annexed sheet of drawings, in which like
letters of reference indicate like parts in any of the several figures.
Fig. 1, represents a flat piece of sheet steel with extending fingers on each side.
Fig. 2, the end view of same when curved to a circle or thereabouts.
Fig. 3, planu of Fig. 2.
Fig. 4, shows the finger made singly.
1
2
1
1

page_text: According to one arrangement we propose to construct our elastic tyre from
sheet steel in the form of a long strip, or a number of shorter strips having projecting
fingers A, extending from each side as shown in Fig. 1, the strip is then curved
until the fingers A, and the uncut portion of the strip B, assume a tubular form as
shown in Fig. 2 the fingers of one side passing into the spaces. C, of the other side,
leaving sufficient space or working clearance between the parts.
This articulated junction of each side of the strip forms the "tread" of the
wheel, and we propose to cover this part with indiarubber of a suitable form of
construction.
Thus the rubber will form the surface which will come in contact with the
roadway, and will be supported by the elastic metallic tyre before described.
Instead of making the metallic tyre and the fingers in one piece, we may make
the fingers separately and secure them to the rim of the wheel D, or to an
intermediate piece afterwards secured to the rim. Such a single finger is shown in
Fig. 4, and a double finger is shown in Fig. 5, in which case the fingers A, made
from one strip of steel may be made to extend towards each other and a space be
left between them as shown.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is.
1. A metallic rim or under-tyre for the wheels of cycles and other vehicles,
constructed with curved elastic fingers substantially as herein before described and
illustrated in Figs. 1. 2. 3 of the drawings.
2. The combination with the metallic rim of cycle wheels, or the equivalent part of
other road vehicles, of a series of curved elastic fingers to form an under-tyre and
constructed either from the same continuous metal as the rim, or made separately.
and secured thereto substantially as hereinbefore described and shown.
Dated the 10th day of April 1896.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.