Improvements applicable to the Rims and Tyres of Bicycle and other Carriage Wheels.
Year: 1893

page_text: Date of Application, 18th Feb., 1893
Complete Specification Left, 11th Nov., 1893-Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements applicable to the Rims and Tyres of Bicycle and
other Carriage Wheels.
I ARTHUR STEAD of No. 35 Cairns Street Oldham in the County of Lancaster,.
Moulder, do hereby declare the nature of this invention to be as follows:
This invention relates principally to the rims (either solid or hollow) for receiving
the pneumatic tyres, the objects of the invention being to cause the tyre when
inflated to adhere more closely to the rim, and also to prevent the tendency of the
tyre to "creep" in the direction of the circumference.
For these purposes instead of making the inner curve of the rim (whether solid
or hollow) a smooth curved surface as usual I propose to make the same with longi-
tudinal corrugations the edges of which are slightly under-cut so that when the
pneumatic tyre is put in place and inflated it will be pressed into the recesses
between the corrugations which thus hold it and prevent it from being withdrawn.
until the pneumatic tyre has been deflated.
In order to prevent the "creeping" of the pneumatic tyre in a circumferential
direction I also make transverse ridges or corrugations upon the inner curve of the
metal rim. And I sometimes similarly corrugate the exterior of the pneumatic:
tyre to assist in keeping the latter in place.
Dated this 17th day of February 1893.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements applicable to the Rims and Tyres of Bicycle and
other Carriage Wheels.
I ARTHUR STEAD of No. 35 Cairns Street Oldham in the County of Lancaster,
Moulder, 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 principally to the rims (either solid or hollow) for receiving
pneumatic tyres, the objects of the invention being to cause the tyre when inflated
to adhere more closely to the rim and also to prevent the tendency of the tyre to
"
creep in the direction of the circumference.
66
My invention will be readily understood from the following description on
reference to the accompanying drawings.
Fig. 1 is a section of a metallic rim made according to my invention.
Fig. 2 is a plan thereof and
Fig. 3 a plan of a modification hereafter referred to.
Figs. 4 and 5 illustrate the tyre cover to be used therewith.
Fig. 6 is a section of the tyre and rim together and Fig. 7 shews how one side
of the tyre cover may be attached to the rim, if required.
Instead of making the inner curve of the rim a (whether solid or hollow) a
smooth curved surface as usual I make the same with longitudinal corrugations a¹
of suitable length so that when the pneumatic tyre (i.e. the cover band inner tube c)
is put in place and inflated as shown at Fig. 6 it will be pressed into the recesses
between the corrugations a¹ which will thus hold it and prevent it from being
withdrawn until the pneumatic tube c has been deflated.

page_text: In order to prevent the "creeping" of the pneumatic tyre in a circumferential
direction I also make transverse ridges or corrugations a² upon the inner curve of
the metal rim a, as shown at Fig. 2.
I sometimes also form corresponding corrugations or depressions in the exterior
of the pneumatic tyre cover (as shewn at 6 Figs. 4 and 5) to assist in keeping
the latter in place.
Figs. 3, 4 and 5 shew that the transverse ridges may be dispensed with, and I
would here remark that the corrugations or raised parts of the inner surface of the
rim may be disposed in various ways, they may be even no longer than their width
provided that the depressions in the tyre are correspondingly arranged so that not
only is the tyre held in the rim but is also prevented from creeping in the direction
of the circumference of the wheel.
If it is desired to prevent the loose tyre from being detached altogether from
the rim a few spring studs or other similar known devices may be applied round the
rim at one side thereof as shown at Fig. 7 but to such device I make no claim as
part of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. The combination with pneumatic or inflatible tyres for bicycle and similar
wheels of a metallic rim provided on its peripheral concave face with a series of
corrugations or raised parts of such size and so disposed thereon that the inflation
of the tyre not only causes adherence of the cover to the rim but also prevents the
said tyre from creeping in the direction of the circumference of the wheel
substantially as hereinbefore set forth.
2. The combination with pneumatic or inflatible tyres for bicycle and similar
wheels of a metallic rim provided on its peripheral concave face with a series of
corrugations or raised parts of such size and so disposed thereon that the inflation
of the tyre not only causes adherence of the cover to the rim but also prevents the
said tyre from creeping in the direction of the circumference of the wheel the cover
of the said tyre being provided with corresponding depressions substantially as
hereinbefore set forth.
Dated this 7th day of November 1893.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.