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

page_text: Date of Application, 24th Oct., 1892
Complete Specification Left, 18th July, 1893-Accepted, 19th Aug., 1893
PROVISIONAL 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 to be as follows:-
My invention relates to an improved method of attaching the covers or jackets
of pneumatic tyres to the rims of wheels, the object being to enable the said covers
or jackets to be detached from the rims for the purpose of getting at the air
tubes.
According to my present invention I form on the edges of the tyre small flanges,
beads or enlargements, and on the inner side of the rim; i.e., the side adapted to:
receive the spokes I form recesses adapted to receive the said flanges, beads or
enlargements on the edges of the cover or jacket, the said. edges of the cover or
jacket being folded round the edges of the rim which are made of a convenient
shape to prevent the cover or jacket being cut thereon. The flanges, beads or
enlargements on the edges of the cover or jacket are kept engaged with the recesses
formed on the inner side of the rim by means of hoops, bands, cords or their
equivalents adapted to be placed between the edges of the cover and the rim.
These locking hoops or their equivalents may either take the form of metallic split
hoops or rings adapted to be sprung into place, or they may take the form of a
length or ring of flexible cord, or providing the shape of the rim on the inner side
is suitable they may take the form of complete hoops or rings of metal or any other
suitable material or substance.
I am aware that the covers or jackets of pneumatic tyres have been fixed to the
outer faces of the rims of wheels by means of hoops, bands, cords, or their
equivalents, engaging with or forcing enlarged edges of the cover into recesses
formed in the outer face of the rim, but in these constructions the whole strain of
keeping the cover or jacket on to the rim is thrown on the said hoops, bands, or
cords, but by my construction this strain is removed from the locking hoops, bands,
or their equivalents, as the frictional contact between the edges of the cover or
jacket where they are lapped round the edges of the rim is sufficient to relieve the
hoops, bands or their equivalents from nearly all the strain, while at the same time
the said frictional contact between the said cover or jacket in the rim is sufficient
to prevent any creeping of the cover or jacket.
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 an improved method of securing the cover of a pneumatic.
tyre to a wheel rim, the object being to so attach the cover to the wheel rim that

page_text: it can readily be detached therefrom and reattached thereto when it is necessary to
get at the air tube for the purpose of repairing it.
To this end my invention consists in forming on the inner face of the rim, i.e., the
face adapted to receive the spokes of the wheel, grooves or recesses, in forming
the cover of the tyre with beads or enlargements on its edges adapted to engage
with the grooves or recesses in the rim, and of bands, cords or their equivalents
adapted to retain the beaded or enlarged edges of the cover in the said grooves or
recesses in the wheel rim.
In the accompanying drawing which forms part of this Specification,
Figures 1, 2, 3, and 4 are views in transverse section of a tyre and wheel rim
embodying my invention showing various forms it may assume, one edge of the
cover is shown on the right side of each view secured to the wheel rim, while the
other edge of the cover is in each view shown in the processes of being detached
from or attached to the wheel rim.
Throughout the views similar parts are marked with like letters of reference.
The rim A of the wheel which may be either of the solid type as shown by
Figures 1 and 2, or of the hollow type as shown by Figures 3 and 4, of the
accompanying drawing, has its edges turned inwards and so shaped as to form
grooves or recesses a, a, on the edge of the inner face of the rim. The grooves or
recesses a, a, may be either in the vertical plane as shown by Figures 1 and 2 of
the accompanying drawing, or in the horizontal plane as shown by Figure 3 of
the accompanying drawing, or as a further alternative at an angle between the
horizontal and vertical planes as shown by Figure 4 of the accompanying drawing.
The cover B of the tyre which, is made of rubber reinforced with canvas in the
well-known manner has beads, flanges or enlargements b, b, formed on its edges
adapted to engage with the grooves or recesses a, a, in the wheel rim. The turned
down edges of the rim A are well rounded so that there is no tendency for the edges
of the cover when folded round them to become cut. To lock and retain the
edges b,, of the cover in the grooves or recesses a, a, in the wheel rim locking
bands cords or their equivalents C, C, are employed. When the grooves or
recesses a, a, in the wheel rim A are in the vertical plane as shown by Figures 1
and 2 of the accompanying drawing the locking bands or their equivalents C, C,
may take the form of complete hoops or rings, as they can be slid towards the centre
of the rim i.e. towards the spokes when it is desired to disengage the edges of the
cover with the grooves or recesses in the rim ; but when the grooves or recesses a, a,
are in the horizontal plane.as shown by Figure 3 or in any other position as shown
by Figure 4 of the accompanying drawing, then the locking bands or their equivalents
must either be made as joint or split hoops or rings to enable them to be placed in
position. These locking bands or their equivalents need not of necessity be made
of a rigid material as they are equally effective if made of rubber, cord, or other
suitable flexible material.
To ensure the locking bands being kept in position when the grooves or
recesses a, a, in the rim are in the vertical plane, I sometimes form undercut
recesses a¹, a', in the wheel rim for the locking rings, bands or their equivalents to
engage with, as shown by Figure 2.
By folding the edges of the cover round the edges of the rim considerable
frictional contact is obtained between the cover and the rim which relieves the
locking edges of the cover of a considerable amount of the strain thrown on them.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction herein before described and illustrated by the accompanying
drawings, but that I hold myself at liberty to make such changes and alterations as
fairly fall within the spirit and scope of my invention.
I am aware that the covers of pneumatic tyres have already been secured to
wheel rims by having beads or enlargements on their edges engaging with
grooves or recesses in the outer face of the rim and kept engaged therewith
by means of bands or cords and I therefore do not broadly claim such as my
invention, but

page_text: 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 herein before described method of securing the cover of a pneumatic
tyre to a wheel rim, which consists in forming on the edges of the divided cover
heads or enlargements, in forming in the inner face of the rim grooves or recesses
adapted to receive the beaded or enlarged edges of the cover, and of bands cords or
hoops adapted to engage with the beaded or enlarged edges of the cover and the
inner face of the rim to lock the edges of the cover in the grooves or recesses in the
inner face of the rim, as set forth.
2. In a pneumatic tyred wheel, the combination of a wheel rim having two
grooves or recesses formed in its edges on the inner face thereof, of a cover having
beads or enlargements formed on its edges adapted to engage with the grooves or
recesses in the edges of the rim, of two bands or cords adapted to engage with the
edges of the cover in the grooves or recesses in the wheel rim, as set forth.
3. In a pneumatic tyred wheel, the combination with a wheel rim the edges of
which are turned inwards to form grooves or recesses in the vertical plane in its
edges on the inner face thereof, of a cover having beads or enlargements on its
edges adapted to fit in the grooves or recesses in the edges of the rim, and of bands
or cords in the form of hoops or rings adapted to lock the edges of the cover to the
wheel rim, as set forth.
4. In a pneumatic tyred wheel, the combination with a wheel rim the edges of
which are turned inwards to form grooves or recesses in the horizontal plane in its
edges on the inner face thereof, of a cover having beads or enlargements on its
edges adapted to fit in the grooves or recesses in the edges of the rim, and of bands
or cords in the form of split hoops or rings adapted to lock the edges of the cover to
the wheel rim, as set forth.
5. The improved construction of pneumatic tyre substantially as hereinbefore
described and illustrated by Figure 1 of the accompanying drawing,
6. The improved construction of pneumatic tyre substantially as herein before
described and illustrated by Figure 2 of the accompanying drawing.
7. The improved construction of pneumatic tyre substantially as hereinbefore
described and illustrated by Figure 3 of the accompanying drawing.
8. The improved construction of pneumatic tyre substantially as hereinbefore
described and illustrated by Figure 4 of the accompanying drawing.
Dated this 15th day of July 1893.
ROBT. ED. PHILLIPS.