Improvements in the Means of Affixing Pneumatic Tyres to the Wheels of Bicycles, Tricycles, or other Vehicles having Rims of the Ordinary Construction, adapted for either Solid or Cushion India Rubber Tyres.
Year: 1892

page_text: Date of Application, 6th Aug., 1892-Accepted, 10th Sept., 1892
COMPLETE SPECIFICATION.
Improvements in the Means of Affixing Pneumatic Tyres to the
Wheels of Bicycles, Tricycles, or other Vehicles having Rims
of the Ordinary Construction, adapted for either Solid or Cushion
India Rubber Tyres.
We, ARTHUR MCDOUGALL and ROBERT MCDOUGALL both of Holland
Street, Pendleton, in the County of Lancaster, India Rubber Manufacturers, 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 a means of applying pneumatic tyres to the rims of
wheels of bicycles, tricycles or other vehicles in which said wheels have either
solid or cushion india rubber tyres. The objects of this invention are to utilize
wheels whose rims have not been specially constructed to receive pneumatic tyres
and to enable pneumatic tyres of small sectional area to be employed..
We attain these objects by the means hereinafter described and as illustrated in
the accompanying sheet of drawings, in which
Fig. 1. represents a section of an ordinary cushion tyre attached to the rim of a
wheel and
Fig. 2. shows the same tyre converted into a pneumatic tyre.
In these views similar letters refer to similar parts.
In this invention, in order to convert a cushion tyre such as shown in Fig. 1. into
a pneumatic tyre, we cut the cushion tyre b across in the manner indicated by the
dotted line c d and remove the outer segment b¹; the inner part 6 that remains
affixed to the metal rim a with portion of the rubber walls standing above the
edges of said rim forms a bed or foundation for the pneumatic tyre consisting of
an air tube e as shown in Fig. 2. Said air tube may be secured thereto or to the
rim of the wheel, either by a canvas and india rubber covering for other preferred
means, and inflated through a non-return valve. The rubber that is left projecting
at c and d above the rim of the wheel, by affording a yielding surface to the air
tube, prevents said air tube from being pressed into contact with and injured by
the edges of the rim when the tyre is compressed by the rider's weight, and
pneumatic tyres of small sectional area may thereby be fitted with safety to the
ordinary rim of a wheel.
We apply our invention in like manner to the rims of wheels having solid rubber
tyres.
New wheels may have cushions of like form placed between the metal rim and
the air tube.
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 :-
B
1st. In wheels of bicycles, tricycles or other vehicles that have either solid or
cushion india rubber tyres attached to the rims of said wheels, the application
thereto of pneumatic tyres by removing the outer segment of either the solid or
the cushion india rubber tyre and affixing in its place a pneumatic tyre in the
manner and for the purpose substantially as herein before described.
2nd. In wheels of bicycles, tricycles or other vehicles that have rims of the
ordinary construction adapted for either solid or cushion india rubber tyres the
application of a pneumatic tyre with an india rubber cushion of a form substantially
the same as the inner segment * of a solid or a cushion india rubber tyre placed

page_text: between the metal rim and the air tube for the purpose and in the manner
substantially as herein before described.
Dated this 5th day of August 1892
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester,
Agent for Applicants.