Improvements in Pneumatic Tyres and in Rims to be used' therewith.
Year: 1893

page_text: Date of Application, 21st Oct., 1893-Accepted, 25th Nov., 1893
Improvements in Pneumatic Tyres and in Rims to be used'
therewith.
I, AARON SMITH CARTWRIGHT of 75 Ford Street, Hockley, in the City of
Birmingham, 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 :-
My invention relates to pneumatic tyres and to the rims employed therewith, and
has for one of its objects, a simple and more efficient means of connecting the inner
circumferences of the said tyres to the rims, and for another of its objects, a single
tube tyre capable of being easily and expeditiously repaired if punctured, and a
further object is so forming the attachment means of both the tyre and rim that the
separation or pulling out of flanges of the one from undercut annular recesses of the
other is prevented.
-
Figure 1 of the accompanying drawing represents in transverse vertical section,
a single tube tyre with rim both constructed or arranged or provided with.
improvements made according to my invention.
Figure 2 represents a side elevation of Figure 1, or a portion of a wheel
circumference.
Figure 3 is a perspective view of a portion of the tyre separately, so as to show
the circumferential hook flanges on the sides, which take into circumferential hook-
sectioned cavities disposed upon the two opposite sides of the rim, a portion of which
is shown in section and in perspective in Figure 4.
Figure 5 shows how the attachment foot or inner circumference of the tyre is
connected with the rim.
Figure 6 represents a horizontal section upon the dotted lines A B Figure 3,
showing the exact conformation of the hooked flanges in plan.
The same letters of reference indicate corresponding parts in the several figures
of the drawing.
a is the tyre, made up of a single tube a', with the walls of the tread a³, thickened,
and with the greatest breadth of the side walls, when inflated as in Figure 1,
overhanging the rim, as hereinafter described.
Now the base or foot a³, of the single tube tyre has turned-up or hook-shaped
circumferential flanges or side ribs a', with circumferential channels a³, disposed at
the two opposite sides of the inner circumference of the said tyre, which hook-shaped
side-ribs a are adapted to engage within the annular or circumferential hook-
sectioned cavities or annular cavities or inverted channels 6', of the rim b, whilst
the channels a³, take over the turned-over edges 6ª, of the metal of the opposite
sides of the rim.
By constructing the rims and the attachments of the tyres which take within the
opposite sides of the rims in manner as described, the said tyres are secured to the
rims without any liability of the hook-sectioned flanges being pulled from out
the cavities of the rims wherein they take and by which the tyre is held.
In connecting a tyre to its rim, first tilt the portion of the same to be introduced
(when the tyre is deflated) upon its side as represented in Figure 5, so as to make
the toe of the hook on one side pass into one of the inverted trough cavities of the
rim, then slightly camber the middle of the inner circumference of the tyre, and
introduce the toe of the other hook flange into the other cavity, then on the tyre
being inflated, the same is firmly connected to the rim.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be perforined, I declare that what I
claim is :-
First. In single-tube pneumatic tyres, securing the same to rims by circum-
ferential and turned up hook-sectioned flanges or ribs taking into like-shaped
inverted circumferential cavities or channels formed upon the two opposite sides of
the rim, substantially as described and set forth.
Secondly. In single-tube pneumatic wheel circumferences, consisting of a single-
tube tyre a, having hook-shaped ribs or circumferential flanges a, with channels «³,
taking within inverted circumferential channels 6, with terminations b², of the rim b,
substantially as described and set forth.
Thirdly. The improvements in the construction of pneumatic tyres and in the
means of securing the same to their rims, substantially as described and set forth.
Dated this 20th day of October 1893.
AARON SMITH CARTWRIGHT,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.