Improvements in Felloes or Rims, also Tyres of Bicycles, Tricycles, and other Vehicles where Tyres are used, made of India-rubber or other Soft Substances, for Reducing. the Amount of Vibration.
Year: 1890

page_text: Date of Application, 2nd Dec., 1890
Complete Specification Left, 15th Dec., 189U-Accepted, 17th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Felloes or Rims, also Tyres of Bicycles, Tricycles,
and other Vehicles where Tyres are used, made of India-rubber
or other Soft Substances, for Reducing. the Amount of Vibration.
We, TOM ROTHWELL, and FRED ROTHWELL, trading as "The Eclipse Machine
Company" in Oldham, in the County of Lancaster, and elsewhere, Machinists do
hereby declare the nature of this invention to be as follows:-
Previously most felloes or rims have been of the crescent shape, but now, in con-
sequence of tyres being made much larger to reduce the amount of vibration, the
ordinary crescent shaped felloes or rims are found to be defective in consequence of
them cutting the tyre when it overlaps the edges when under the pressure of the rider
or the load.
To avoid this we turn over each edge of the felloes or rims inwards, so that a
The top
section of each edge resembles the letter D or e, turned over thus O, o.
or round edge of the felloe or rim will prevent the tyre from being cut when it over-
laps the edges, and the flat or incurved side will prevent the tyre from being pulled
out of the felloe or rim, when travelling along the road. The invention also provides
for the making of suitable tyres of india rubi er or other soft substances which may
have the desired elasticity with grooves or hollows in each side corresponding to the
described projections on felloes or rims.
יהד
han 1800
TOM ROTHWELL.
FRED ROTHWELL.
COMPLETE SPECIFICATION.
Improvements in Felloes or Rims, also Tyres of Bicycles, Tricycles,
and other Vehicles where Tyres are used, made of India-rubber
or other Soft Substances, for Reducing the Amount of Vibration.
We, TOM ROTHWELL and FRED ROTHWELL, trading as "The Eclipse Machine
Company" in Oldham, in the County of Lancaster, and elsewhere 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 :-
Previously most felloes or rims have been of the crescent shape, but now, in con-
sequence of tyres being made much larger to reduce the amount of vibration, the
ordinary crescent shaped felloes or rims are found to be defective, in consequence of
them cutting the tyre when it overlaps the edges, through the pressure of the rider or
the load.
Figures 1 and 2 of the accompanying drawing represent sectional elevations of
felloe or rim which form part of our invention.
In the manufacture of our invention we turn over each edge of the felloe or rim
inwards as shown at A. A' Fig. 1 or C. C¹ Fig. 2, so that the inward curves A A'
or CC shall be about represented by a semi-circle.
The round edges A A¹ Fig. 1. and CC Fig. 2 will prevent the tyre from being
cut by the rim when it overlaps the edges, through the pressure of the rider or the
load, and the flat sides or chords of the curves B B¹ Fig. 1, or the inward
cavities D D Fig. 2 will prevent the tyre from coming out of the rim when running
along the road.
There are other felloes or rims with inward projections, but none of them have the
Prise 61

page_text: advantage of a curved upper edge to prevent cutting, and a flat or cavity underside
to make the tyre quite firm when once fixed in position.
We do not claim as part of our invention an inward projection at right angles when
the edges are not turned over or under, or thickened, to prevent the tyre from being
cut, nor do we claim an inward curve that is carried round in the form of a circle, as
in this case they lose the advantage of the flat or incurved surfaces, B B¹ Fig. 1
and D D¹ Fig. 2, which we consider are very important.
It will be easily perceived that many other forms and modifications of this felloe or
rim can be made, but we think those shown by Figs. 1 and 2 are the best and most
suitable.
Fig. 3 shows a section of tyre made of india-rubber or other substance which may
have the desired elasticity, with suitable grooves or hollows E. E' running along each
side and corresponding to the projections on the inside of the rims.
Fig. 4 is a sectional elevation of the felloe or rim with the tyre fixed in position.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is.
,
1. The manufacture of felloes or rims of bicycles, tricycles and other vehicles, with
inward projections along each edge, so that the upper portion will prevent cutting of
the tyre. and the under portion will prevent the tyre from coming out, substantially as
described and illustrated.
2. The manufacture of suitable tyres of india-rubber or other substances which may
have the desired elasticity, with grooves or hollows in each side corresponding to the
described projections on felloes or rims substantially as described and illustrated.
Dated this 12th day of Decembar 1800.
TOM ROTHWELLA
FRED ROTH WELL.