Improvements in the Means of Affixing Pneumatic Tyres to the -Wheels of Bicycles, Tricycles, and other Vehicles.
Year: 1893

page_text: Date of Application, 18th Feb., 1893-Accepted, 18th Mar., 1893
COMI LEIE DI MOITIATION.
Improvements in the Means of Affixing Pneumatic Tyres to the
-Wheels of Bicycles, Tricycles, and other Vehicles.
I, ROBERT M'DOUGALL, of Holland Street, Pendleton, in the County of
Lancaster, India Rubber Manufacturer, 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 affixing pneumatic tyres to the rims of
bicycles, tricycles or other vehicles, and the object of this invention is to attach
the outer covering, which is usually formed of canvas and india rubber, to the rim
of the wheel in such a manner that said cover may be easily removed either
wholly or partially, for any repair to, or renewal of, the pneumatic tube contained
therein, but will not become detached from the rim of the wheel, if through any
unforseen cause the air tube should become deflated.
I attain this object by the means hereinafter described and as illustrated in the
accompanying sheet of drawings, in which
Fig. 1 is a transverse section of a cover, and
Fig. 2 is a transverse section of a pneumatic tyre constructed according to this
invention with said cover applied, and with the air tube inflated.
Fig. 3 is a transverse section of the same tyre showing the manner in which the
aforesaid cover is fitted on to the rim of the wheel.
In this invention I construct an outer covering such as a of the usual composition
of india rubber and canvas, or other suitable material, with a thick back b which
is divided longitudinally so as to form two parts 6 and 6: I form the outer side
edges and 6 of said back so that they may fit into correspondingly dovetailed
edges c¹ and c on the rim c and form a butt joint at the division 65.
с
In building up a tyre such as is shown in Fig. 2, I place first the smaller
portion of the back against the inner side of the dovetailed edge c¹ of the rim c
to which, if preferred it may be cemented: I then place around the rim c the air
tube d, non-inflated; I place over said air tube the cover a, passing the larger
portion of the back between the said air tube d and the rim c: I place the
edge against the inner side of the dovetailed edge c³, and laying the cover a over
towards the side I press down from the outside of the cover, the back on to
the rim e so that the two portions and practically form one back and are
thereby firmly retained in position, irrespective of the inflation of the air tube.
In order to open any portion of the aforesaid cover the back b is pressed up away
from the rim in places by means of small studs or pressers f inserted at intervals
into holes in said rim.
I am aware that rims of wheels which have their edges turned over more or less
have been in use prior to the date of this my invention, I therefore do not desire
to make any claim in respect of the rim, but
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what
I claim is
In pneumatic tyres, or tyres that have an air tube enclosed by a covering of
canvas and india rubber, the means of attaching said covering to the rim of the
wheel by a thick back forming a part thereof, which is divided longitudinally but with
the edges of said division in close contact as shown on drawings, so that the outer
edges of back which are dovetailed, are caused to fit into correspondingly dovetailed

page_text: edges formed on rim irrespective of the inflation of the air tube in the manner and
for the purpose substantially as herein before described.
Dated this 17th day of February 1893.
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester, Agent for Applicant.