An Improved Method of and Means for Attaching Pneumatic and other Flexible Tyres to the Wheels of Velocipedes and other Vehicles.
Year: 1891

page_text: Date of Application, 19th Sept., 1891
Complete Specification Left. 19th May 1892-Accepted 25th June 1892
PROVISIONAL SPECIFICATION.
An Improved Method of and Means for Attaching Pneumatic and
other Flexible Tyres to the Wheels of Velocipedes and other
Vehicles.
THOMAS WILSON ROBERTSON 184 Grosvenor Street Belfast Ireland Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
:-
In carrying out my said invention I use a rim of any ordinary section and attach
on each edge thereof a channeled wing of such shape and dimensions as to suit
the edges of the tyre, the edges of the tyre are enlarged or I may use a rim with a
channel at each edge and place a band around to bind the edges of the tyre
in place.
In case of an inflatable tube and an outer or binding cover being used it would be
the edges of the outer or binding cover that would be enlarged, at the same time
I may use an inflatable tube with enlarged edges formed thereon or I may attach
enlarged edges thereto by means of cement solution or the like.
The channeled wings or the bands may be in one or more pieces at each edge
of the rim and are attached by means of bolts screws clips or the like.
Dated this 17th September 1891.
THOMAS WILSON ROBERTSON.
COMPLETE SPECIFICATION.
An Improved Method of and Means for Attaching Pneumatic and
other Flexible Tyres to the Wheels of Velocipedes and other
Vehicles.
I, THOMAS WILSON ROBERTSON, of 184 Grosvenor Street, Belfast, Ireland,
Mechanical Engineer, 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:-
My invention relates to methods of and means for securing elastic tyres to the
rims of wheels for velocipedes and other vehicles.
The chief feature of my said invention consists in using two bands or straps
one on each edge of the tyre to secure the same to the wheel rim.
According to one method of carrying out my invention I form a circumferential
channel or groove near each edge of the rim for receiving the edges of the tyre
which are or have been enlarged or thickened, and I provide covering straps or
bands for retaining the edges of the tyre in the said channels or grooves.
In another arrangement I form the channels or grooves in the bands or straps
which secure the tyre in place instead of forming the said channels in the ruin
itself. In this case I may use an ordinary rim.
I will now describe my invention with reference to the accompanying drawings,
in which
Figure 1 is a transverse section of a tyre and rim made in accordance with my
invention.
Figure 2 is a plan view of the same.
Figure 3 shows the manner in which the ends of the bands are secured together.
Figure 4 is a transverse section showing a tyre fitted to a plain rim by means of
my improved grooved bands.
Figure 5 shows a device for securing the ends of the bands together so that
they can be expanded to press the edges of the tyre against the rim.
Similar letters of reference denote corresponding parts in all the drawings.

page_text: A is the air tube of an ordinary pneumatic tyre; B is the outer cover, having
enlarged edges as shown at B, C is the rim of the wheel; D, D, are bands or
straps for holding the tyre in place.
Referring now to Figures 1 and 2 the rim C is provided with channels or
grooves Cat or near each edge in which channels the edges B' of the cover are
placed and retained by the bands or straps D which encircle the rim. The rim C
has a raised portion C2 in its centre which keeps the bands in place. For this
purpose I sometimes attach studs E to the bands as shown in Figure 1, which studs
pass through holes in the rim and prevent displacement of the bands while allowing
of the bands being tightened as hereinafter described. The ends of the bands
which when in position overlap are furnished with internal lugs F F1 and in one
end is formed a slot D'. The lug F1 passes through the slot D' and through it is
screwed a pin or bolt G the end of which bears against the lug F and preferably
rests in a hole G₁ formed in the said lug. Suitable holes are formed in the rim of
the wheel through which the lugs. F F project. By turning the pin or bolt G the
band may be tightened upon the rim. This arrangement may be inverted by
placing the bands inside the rim and passing the edges of the tyre around the
edges of the rim.
In the arrangement shown in Figures 4 and I employ a plain or ordinary rim C
in which I fix internally projecting studs E. The bands D in this case are placed
inside the rim; they are formed with holes to receive the studs E. The said
bands Dare grooved or channelled circumferentially as shown at D to receive the
edge of the cover B'. The device for expanding the bands D against the rim is
shown in Figure 4. Near each end of the band a lug F is formed through one of
which lugs a screwed pin G is inserted. The end of the screwed pin butts against
the other lug F so that by turning the pin in the proper direction the bands may be
expanded against the inside of the rim. The bands or straps D may be made in
two or more pieces if desired.
The figures illustrate the application of my invention to a pneumatic tyre but it is
obvious that by forming upon or securing to any other elastic tyre winglike exten-
sions having thickened or enlarged edges I may attach such tyre to the rim of a
wheel in the manner herein before described.
I am aware that one band has been applied to fasten both edges of a flexible
tyre upon the rim of a wheel but I am not aware that two bands one at each edge
of the rim have been used in the manner proposed by me. In my invention when
one of the bands is slackened only one side of the tyre is released and it is therefore
the more practical method.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
First. Securing an elastic tyre to a wheel by means of two hoops or bands
placed outside or inside the rim, the edges of the tyre being thickened or enlarged
and held between the bands and the rim in two grooves or channels formed in the
rim one at or near each edge thereof or formed in the said tightening bands, sub-
stantially as described.
Second. A rim for a velocipede or other wheel having a raised central portion C³,
in combination with the tightening bands D, substantially as, and for the purpose,
specified.
Third. The combined rim and tyre constructed substantially as hereinbefore
described with reference to either of the forms shown in the accompanying
.drawings.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.