Improvements in and relating to Pneumatic or Air Inflated Tyres.
Year: 1892

page_text: Date of Application, 11th Nov., 1892
Complete Specification Left, 8th Aug., 1893-Accepted, 9th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic or Air Inflated Tyres.
1 ROBERT EDWARD PHILLIPS, Member of the Institution of Mechanical
Engineers, of 70 Chancery Lane, in the Parish of St. Andrews Holborn, in the
County of London, Patent Agent, do hereby declare the nature of this invention
which has been communicated to me from abroad by Leopold Holt temporarily
residing at Frankfort-on-the-Main, to be as follows:-
My invention relates to improvements in that type of tyre described in Holt's
Patent No. 13076 of 1891, in which the cover is made of a tubular or approximately
tubular shape in cross section, is split or divided along its inner side, and has radial-
flanges or enlargements on its edges adapted to engage with a circumferential
groove in the centre of the concave face of the rim. In that construction of tyre
it has been found from practice that to ensure the tyre being firmly held to the rim
by the inflation of the air tube, the said air tube must be made of rubber and
canvas, and the object of this invention is to enable an air tube made of rubber only
to be used with this construction of tyre.
I attain this end by making the flanges or enlargements on the edges of the cover
of hard rubber, vulcanite, or other suitable substance or material which will render
the said edges unstretchable., The shape and sizes of these flanges or enlargements
are such that they will entirely fill up the width of the groove in the rim when the
cover is in place thereon. I prefer to incline the edges of the groove in the rim
towards one another and undercut the flanges or enlargements on the edges of the
cover so that they engage more securely the one with the other. To enable
the flanges or enlargements to be placed in position in the groove in the rim the two
edges of the cover are forced together until the flanges or enlargements stand out at
right angles thereto, instead of being radial therewith, in which position they are
placed in the groove in the rim, when by the natural expansion of the cover to
assume its normal circular shape the flanges or enlargements become engaged or
interlocked with the edges of the groove in the rim, and they cannot be removed
therefrom until the edges of the cover are pressed together to again reverse the
position of the flanges or enlargements on its edges.
Dated this 11th day of November 1892.
ROBT. ED. PHILLIPS.
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic or Air. Inflated Tyres.
I, ROBERT EDWARD PHILLIPS, Member of the Institution of Mechanical
Engineers, of 70 Chancery Lane, in the Parish of St. Andrews Holborn, in.the
County of London, Patent Agent, do hereby declare the nature of this invention
(which has been communicated to me from abroad by Leopold Holt temporarily
residing at Frankfort-on-the-Main) 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 improvements in that type of tyre described in 'Holt's
Patent No. 13076 of 1891, in which the cover is made of a tubular or approximately
tubular shape in cross section, is split or divided along its inner side, and has radial
flanges or enlargements on its edges adapted to engage with a circumferential
In that construction
groove in the centre of the outer or concave face of the rim.

page_text: mu from practice that to ensure the tyre being held my
the rim by the inflation of the air tube, the said air tube must either be made
of rubber and canvas, or enclosed in a canvas bag or pocket, which is a drawback to
the rapid removal of the air tube for the purpose of repair, and the object of
this invention is to enable the edges of the cover to so engage with the groove in
the wheel rim that an air tube made of rubber only can be used with this
construction of tyre.
I attain this end in the manner illustrated in the accompanying drawing, in
which :-
Figure 1 is a view in transverse section of a tyre and wheel rim embodying my
invention.
Figure 2 is a broken plan view in section of the cover.
Figure 3 is a view in transverse section showing how the edges of the cover are
placed in the groove in the wheel rim.
Figure 4 is a broken view in transverse section of another form my invention may
assume.
Figure 5 is a view in transverse section of another method of carrying my
invention into effect.
Figure 6 is a broken plan view in section of the cover used in the construction
shown by Figure 5, and
Figure 7 is a view in transverse section showing how the edges of the cover are
placed in the groove in the wheel rim.
Throughout the views similar parts are marked with like letters of reference.
The divided cover A is made of rubber reinforced with canvas in the well-known
manner and it has formed on its edges flanges or enlargements "a," "a," made of
hard rubber, vulcanite, or other suitable material as shown by Figures 1, 2 and 3.
As a modification the flanges or enlargements "a," "a" may be made by rivetting
or otherwise fixing metallic plates to the divided edges of the cover as shown
by Figure 4.
a,
are rigid and unstretch-
It is essential that the flanges or enlargements "a," 9766 "
able so that when the tyre is inflated it assumes a regular and even shape.
The wheel rim B which may be either hollow or solid has a central groove "b,"
the edges of which incline towards one another so as to restrict or narrow the mouth
of the groove on the outer or concave face of the rim.
The cover A is divided as shown by Figure 2 so that the flanges or enlarge-
ments "a," "a," completely fill the width of the groove "" in the wheel rim B,
and the part of the flanges or enlargements" 3966
adapted to interlock with the
edges of the groove "6" are undercut as shown.
a,
A,
"
The air tube C is of the usual construction made of rubber only and is provided
with any suitable valve for inflation and deflation.
To enable the flanges or enlargements on the edges of the cover to be placed in
position in the groove in the wheel rim, the edges of the cover either together or
separately are tilted until the flanges or enlargements stand out at approxi-
mately right angles to their normal position instead of being radial therewith, in
which position they are placed in the groove in the rim as shown by Figure 3, when
by the natural expansion of the cover to assume its normal circular shape the
flanges or enlargements become engaged and interlocked with the edges of the
groove in the rim as shown by Figure 1, and they cannot be removed therefrom
until the edges of the cover are tilted or pressed together to again reverse the
position of the flanges or enlargements on its edges.
As a modification the cover A may be divided as shown by Figure 6, the flanges
or enlargements "a,"
," "a," thereon being cut or formed to make a series of pro-
jections and recesses. To place the edges of the cover in the groove in the wheel
rim the one edge of the cover is moved circumferentially or longitudinally with
respect to the other edge thereof until the projections on one edge of the cover fit
into the recesses in the other edge thereof and vice versa, in which position they can
be passed into the groove in the wheel rim, as shown by Figure 7.

page_text: I wish it to be particularly understood that I do not limit myself to the precise
details of construction hereinbefore described and illustrated by the accompanying
drawing, but that I hold myself at liberty to make such changes and alterations as
fairly fall within the spirit and scope 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 improvements in and relating to pneumatic or air inflated tyres, substan-
tially as hereinbefore described and illustrated by the accompanying drawing.
2. The hereinbefore described combination and arrangement of parts consti-
tuting an improved method of attaching and securing the covers of pneumatic tyres
to wheel rims.
3. The improvement in pneumatic tyres as hereinbefore described and illustrated
by Figures 1, 2 and 3 of the accompanying drawing.
4. The improvement in pneumatic tyres as hereinbefore described and illustrated
by Figures 5, 6 and 7 of the accompanying drawing.
Dated this 8th day of August 1893.
ROBT. ED. PHILLIPS.