Improvements in Attaching Pneumatic Tyres to the Rims of Wheels:
Year: 1893

page_text: Date of Application, 9th Jan., 1893
Complete Specification Left, 9th Oct., 1893-Accepted, 11th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Attaching Pneumatic Tyres to the Rims of Wheels:
I, ROBERT JOHN ALPE, of 128, Fentham Road, Birchfields, Birmingham, in
the County of Stafford, Mechanical Engineer do hereby declare the nature of this
invention to be as follows:-
My invention relates to the attachment of pneumatic tyres to the rims of wheels
and especially to that class of tyre in which the air-chamber is enclosed in a cover
held in position by means of wires passed through sleeves or pockets in the edges
such cover.
of
The object of my invention is to provide improved means for connecting the ends
of the wires and at the same time enabling them to be disconnected when it is
required to remove the said cover or to loosen the same for the purpose of with-
drawing the air-chamber.
t
In carrying out my invention I attach to one end of each of the wires a toothed,
rack and upon the other end of each of the said wires I attach a tube or channelled
bar adapted to fit over and receive the said rack. On the said tube or channelled
bar I arrange a spring-catch which, as the tube or bar and rack are pushed
together, will slip over the teeth of the latter but which will under ordinary,
circumstances prevent the rack from again being withdrawn from the tube until it
is positively operated for the purpose.
In order to prevent the spring-catch from being inadvertently withdrawn from
the rack I advantageously arrange over it a screw-cap which can be screwed down
so as to press upon the outer end of the said spring-catch.
:
It is to be understood that instead of using a spring-catch I may employ any
other suitable means for fixing the tube or bar relatively with the rack.
to
I sometimes put on the end of my rack a stop so that the wire will only be
released sufficiently to lift over the edge of the rim or give sufficient slack
withdraw the air-chamber.
Dated this 0th day of Januar 1802
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Attaching Pneumatic Tyres to the Rims of Wheels.
I, ROBERT JOHN ALPE, of 128, Fentham Road, Birchfields, Birmingham, in
the County of Stafford, 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 the attachment of pneumatic tyres to the rims of wheels)
and especially to that class of tyre in which the air-chamber is enclosed in a cover
held in position by means of wires passed through sleeves or pockets in the edges of,
such cover.
The object of my invention is to provide improved means for connecting the ends
of the wires and at the same time enabling them to be disconnected when it is
required to remove the said cover or to loosen the same for the purpose of with-
drawing the air-chamber.

page_text: In carrying out my invention I attach to one end of each of the wires a toothed
rack and upon the other end of each of the said wires I attach a tube adapted to fit
over and receive the said rack. On the said tube I arrange a spring-catch which,
as the tube and rack are pushed together, will slip over the teeth of the latter but
which will under ordinary circumstances prevent the rack from again being with-
drawn from the tube until it is positively operated for the purpose.
In order to prevent the spring-catch from being inadvertently withdrawn from
the rack I advantageously arrange over it a screw-cap which can be screwed down
so as to press upon the outer end of the said spring-catch.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of my improved device for connecting the ends of the
wires; and,
Figure 2.is a longitudinal section of the same:
Figure 3 is a section on the line 3-3, Figure 1:
Figure 4 is a side elevation shewing how my improved connecting device is
applied to a tyre; and,
Figure 5 is a section on the line 5-5, Figure 4.
a is my toothed rack, which, as shewn is provided at one end with a nipple b
adapted to have one end of the wire c screwed into it. d is the tube attached to
the other end of the wire c and adapted to receive the rack a within it, the said
tube having formed upon it a socket e. is the catch sliding in the socket and
adapted to engage with the teeth of the rack a, the said catch being operated upon
by a spring g which normally tends to hold the catch in engagement with the said
teeth. To the catch fis connected a rod h, the end of which projects through the
socket e and is provided with a knob ' by means of which the catch may be pulled
against the pressure of the spring g to disengage it from the teeth of the rack a.
is the cap which is screwed onto the socket e and which when screwed so that
it bears upon the knob ¹ serves to prevent the catch from coming out of engagement
with the rack.
When a tyre provided with my improved connecting device is applied to a wheel,
suitable holes are formed in the rim j thereof through which the sockets e, e of the
two wires project, as shewn most clearly in Figures 4 and 5.
In order to slacken the wire it is only necessary to remove the cap i and then to
pull back the catch when the rack a can be moved back to give sufficient slack to
permit of pulling the wire c over the edge of the wheel-rim j.
The rack a shewn in the drawing is made of semi-circular shape as represented
most clearly in Figure 3, but it is to be understood that it may be made of any
other suitable shape. Also, instead of providing a tube d for receiving the rack I
may employ a channelled bar.
It is to be understood that instead of using a spring-catch as before described, I
may employ any other suitable means for fixing the tube or bar relatively with the
rack, for instance, I may employ a set-screw screwed into the socket e and with its
inner end engaging with the teeth of the rack. I sometimes somewhat enlarge
the end of the rack to form a stop so that the said rack cannot be withdrawn
from the tube d.
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. In attaching pneumatic tyres to the rims of wheels the use of a connecting
device comprising a rack attached to one end of the attaching wire adapted to enter
a tube or channelled bar on the other end of the said attaching wire, means being
provided for fixing the said rack relatively with the tube or bar, substantially as
described.

page_text: 2. The manufacture and use of the improved device for connecting the ends of
the wires used in attaching pneumatic tyres to the rims of wheels, substantially as
herein before described and illustrated in the accompanying drawing.
Dated the 9th day of October 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.