Improvements in Wheels for Velocipedes and other Vehioles.
Year: 1891

page_text: Date of Application, 31st Aug., 1801
Complete Specification Left. 30th June. 1892-Accepted. 30th, July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Wheels for Velocipedes and other Vehioles.
I JOSEPH BUCHANAN ROBERTSON 184 Grosvernor Street Belfast, County
Antrim Mechanical Engineer, do hereby declare the nature of this invention to be
as follows:-
My invention consists in having the rims or fellocs of the wheels constructed
with a tubular shaped channel at each edge in combination with an inflatable tube
and also a covering which may be of indiarubber or a combination of indiarubber
and canvas or other suitable material forming what is known by the name tyre.
At or near each edge of the said cover .is formed a tubular cavity capable of
being expanded.
The said tubular cavities are inserted into the channeled edges of the rim and
iuflated until they fill the said channels and bind themselves.
By this means a strong and efficient fastening of the rim and tyre together is
effected and the use of cement solution, bands of wire or other material for this.
purpose is entirely dispensed with.
31st August 1801
JOSEPH BUCHANAN ROBERTSON.
COMPLETE SPECIFICATION.
Improvements in Wheels for Velocipedes and other Vehioles.
I, JOSEPH BUCHANAN ROBERTSON, 184 Grosvenor Street, Belfast, Ireland, 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 means of securing on the rim of a wheel for a velocipede
or other vehicle a cover for the inflated tube employed in what are usually called
pneumatic tyres, as I shall describe referring to the accompanying drawings.
Fig. 1 is a transverse section of rim and tyre, according to my invention.
Fig. 2 is a transverse section of a modified construction.
Fig. 3 is a section of a rim suited for the tyre shewn in Fig. 1, the left half of
Fig. 3 shewing the form of rim as it might first be rolled, the right half shewing its
finished form.
Fig. 4 is a similar section of rim suited for the tyre shewn in Fig. 2.
Fig. 5 is a half transverse section of the cover suited for the tyre shown in
Fig. 1, and
Fig. 6 is a half transverse section of the cover suited for the tyre shown in
Fig. 2.
Like letters of reference are employed to indicate corresponding parts in the
several figures.
The rim R which may be rolled of sheet steel or other suitable metal of the form
half shewn on the left sides of Figs. 3 and 4 has its sloped sides T¹ afterwards
turned inwards by rolling or otherwise to form tubes T with a comparatively
narrow opening or slit S extending the whole length of the rim. The cover C of
caoutchouc or of caoutchouc and canvas combined or of other suitable material is
made with a narrow air channel A' near each edge extending its whole length. In
putting on the cover C over the tube B, commonly known as the bladder, before
inflating B, the edges of the cover C are squeezed through the slits S into the
tubes T and then the channels A' are inflated, thereby swelling them out, as shewn

page_text: at A to fill the tubes T, after which the bladder B is inflated. The swelling out of
the tubular parts A of the cover by making these parts wider than the slits S
prevents them fron being drawn out of the tubes T; but if it should be necessary
to remove the cover C, the pressure in the tubular parts A can be relieved and
then they can be drawn out through the slits S. In this manner the tyre is
effectually secured to the rim of the wheel without the use of cement, binding wires
or other attachments, and in a manner admitting of the tyre being easily removed
and replaced. Obviously a solid tyre of caoutchouc could be fixed in, the manner
described. Or a tubular tyre stuffed with elastic material instead of being inflated
might be employed.
Although I have shewn two special forms of wheel rim each made in one piece
which I prefer, obviously other forms of rim might be employed, not necessarily in
one piece, also the forms of the tyre and rim might be varied without departing
from the method which I have described of securing them together.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein described method of securing a pneumatic or clastic tyre to the
rim of a wheel, by inflating, air channels formed near the edges of the tyre or its
cover within tubular channels formed at the edges of the rim with narrow slits
through which the channelled edges of the tyre are inserted before they are
inflated:
•
2. For securing a pneumatic or elastic tyre to the rim of a wheel in the manner
above referred to, the combination of a tyre or tyre cover having air channels near
its edges, and a rim having tubular channels with narrow slits to admit the edges
of the tyre or cover substantially as herein described.
Dated this 28th day of June 1892.
ABEL & IMRAY,
Agents for the Applicant.