Improvements in and relating to Pneumatic Tyres.
Year: 1892

page_text: Date of Application, 8th Dec., 1892
Complete Specification Left, 18th July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I ROBERT EDWARD PHILLIPS M.I.M.E. of 70 Chancery Lane, in the Parish
of St. Andrews Holborn, in the County of London, Consulting Engineer and
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 of pneumatic
tyres to the rims of wheels so that they may be readily removed therefrom when it
is necessary to get at the air tube.
According to my invention I form the cover of the tyre with divided edges in
each of which are small pockets adapted to contain the fixing bands or wires. The
rim is of any convenient shape in cross section either to receive the edges of the
cover at its edges or at its centre. The binding bands or wires are made of spring
steel and their ends overlap each other in the pockets so that they naturally grip
the rim by their elasticity and yet are extensible to allow the edges of the cover to
be passed over the edges of the rim. The air tube is of the usual construction and
is fitted with any suitable type of valve, the shank of which is provided with a
washer or collar adapted when the stem of the valve is locked down to the rim to
rest on the overlapping ends of the binding bands or wires and grip them to the
rim, and so prevent the hoops formed by the said bands or wires from expanding
or stretching under the inflation of the tyre. The ends of the bands or wires
instead of overlapping may be made to telescope one within the other, in which
construction I sometimes form a stud or hook on the female end of each band or
wire and make holes in the rim for these studs or hooks to engage with. In this
case the washer or collar on the stem of the valve is adapted to engage with the
male ends of the binding bands or wires.
As a modification the studs on the female ends of the bands or wires may be
drilled and tapped to receive set screws adapted to impinge on the male ends of the
bands or wires when the cover is in position in the rim and so lock the ends of the
said bands or wires together. Covering cups may be screwed on to the ends of
the studs over the set screws and close the holes in the rim and prevent the binding
wires from becoming disengaged therewith.
As a further modification both ends of each band or wire may be shaped
to engage with holes in the rim in which case the stem of the valve is adapted
to pass through the rim between the ends of the bands or wires, and on being
locked down to the rim engage with the said ends of the bands or wires and lock
them firmly in position.
3000
ROBT. ED. PHILLIPS.
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, ROBERT EDWARD PHILLIPS, M.I.M.E. of 70 Chancery Lane, in the Parish
of St. Andrews Holborn, in the County of London, Consulting Engineer and
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 attaching and securing the covers

page_text: of pneumatic tyres to wheel rims, and it consists in placing in pockets formed in
the edges of the cover circumferentially elastic hoops or rings adapted by their
elasticity to grip the wheel rim and capable of being rendered circumferentially
rigid when in place on the rim by means of a suitable locking device, the object
being to fix the cover to the wheel rim so that while it can readily and easily be
detached therefrom or attached thereto, it is, when fixed to the rim, secured thereto
in an efficient and reliable manner.
I attain this object by the construction shown in the accompanying drawing in
which-
Figure 1 is a view in transverse section of a pneumatic tyre embodying my
invention in which the elastic hoops or rings are made of round wire.
Figure 2 is a view in transverse section of a pneumatic tyre in which the elastic
hoops or rings are made of flat strips or bands.
Figure 3 is a diagrammatic view showing the construction and action of the
elastic hoops or rings.
Figure 4 is a view in transverse section of a pneumatic tyre embodying my
invention in which one end of the elastic hoop or ring telescopes within the other,
and
Figures 5, 6 and 7 are broken views in longitudinal section showing several
devices for locking the two ends of the elastic hoop or ring together and to the
wheel rim to render the said hoop or ring longitudinally rigid.
Similar parts are marked with like letters of reference through the several
views.
The cover A of the tyre is made of rubber reinforced with canvas in the well-
known manner, and it is formed of an arch-shape in cross section. In each edge of
the cover is formed a pocket a in which is placed a circumferentially elastic hoop
or ring B. The rim C is made of a flat grcoved section as shown, or of any other
similar section. The air tube D is of the usual construction and is provided with
any suitable form of valve for inflation and deflation.
The elastic hoops or rings B, B, may be made either of round spring steel wire
as shown by Figures 1 and 4, or of flat ribbon or band spring steel as shown by
Figure 2. The ends of the wire or band forming the hoops or rings overlap
each other as shown by Figure 3, and the normal diameter of each hoop or
ring is considerably smaller than the diameter of the wheel rim measured at the
bottom of the groove thereof, so that it naturally grips or closes on the rim
by its own elasticity, and has to be sprung open to get it over the edge of the
wheel rim.
To lock the overlapping ends of the hoops or rings together and to the wheel rim
to render them circumferentially rigid and to prevent them creeping on the wheel
rim a clamping plate E is employed through which the shank F of the valve passes
and to which it is fixed by the nut femployed to fix the shank F of the valve to
the air tube D, the said clamping plate E being drawn down to bind or clamp the
overlapping ends of the hoops or rings B together and to the wheel rim by means
of a nut threaded on to the shank F of the valve and bearing against the inner
face of the wheel rim C as shown by Figures 1, 2 and 4.
As a modification the ends of each elastic hoop or ring B may be made to
telescope one within the other as shown by Figures 4, 5, 6 and 7 in which con-
struction round wire is used and a piece of tube forming a socket bis fixed to one
end of each wire for the other end to slide into. To lock the two ends of the
elastic hoop or ring together to make it circumferentially rigid a clamp plate E as
hereinbefore described may be employed, a part of the socket being cut away to
allow the said clamp plate E to rest on the end of the wire in the socket b as
shown by Figures 4 and 6 and thus clamp the two ends together and to the wheel
rim. As an alternative method an eye bolt G may be passed over the socket ba
part of which is cut away as shown by Figure 7 so that when the said bolt is drawn
down by the nut g threaded thereon it clamps the end of the elastic hoop to the
socket end thereof, and both to the wheel rim. Another method of rendering the

page_text: hoops or rings circumferentially rigid is to fix to or form on the socket ba short
socket at right angles to the socket b. The socket is drilled and tapped to
receive a set screw G which when screwed into the said socket impinges on the
end of the elastic hoop or ring and so clamps it to the socket end b thereof. The
sockets,, are passed through holes in the wheel rim which thus prevents
the hoops or rings B, B, creeping, and caps B are screwed on to the ends of the
sockets to lock them to the wheel rim and close the holes therein, as shown by
Figure 5.
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.
I am aware that prior to the date of my invention bands or wires had been used
for fixing and securing the edges of the covers of pneumatic tyres to wheel rims,
and I do not therefore claim such broadly, but
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. The use for securing and fixing the edges of the covers of pneumatic tyres to
wheel rims, of circumferentially elastic hoops or rings capable of being rendered
circumferentially rigid by being clamped to the wheel rim, as set forth.
2. In a pneumatic tyred wheel, the combination of a wheel rim of a flat-grooved
section of a cover having pockets in its edges; of two circumferentially elastic
hoops or rings each made of a length of steel wire the ends of which overlap ;
of a clamp plate fixed to the stem of the inflation valve, and of an air tube
for inflating the tyre, all combined arranged and operating as and for the purpose
set forth.
3. In a pneumatic tyred wheel, the combination of a wheel rim of a flat-grooved
shape in cross section; of a cover having pockets in its edges; of two circum-
ferentially elastic hoops or rings each made of a length of steel ribbon or band the
ends of which overlap; of a clamp plate fixed to the stem of the inflation valve, and
of an air tube for inflating the tyre, all combined arranged and operating, as and for
the purpose set forth.
4. In a pneumatic tyred wheel, the combination of a wheel rim of a flat-grooved
shape in cross section; of a cover having pockets in its edges; of two circum-
ferentially elastic hoops or rings made of a length of steel wire the ends of which
telescope one within the other; of a clamp plate fixed to the stem of the inflation
valve, and of an air tube for inflating the tyre, as set forth.
5. In a pneumatic tyred wheel, the combination of a wheel rim of a flat-grooved
shape in cross section; of a cover having pockets in its edges; of two circum-
ferentially elastic hoops or rings made of a length of steel wire the ends of which
telescope one within the other; of eye bolts adapted to clamp the ends of the
elastic hoops or rings together and to the wheel rim, and of an air tube for inflating
the tyre, as set forth.
6. In a pneumatic tyred wheel, the combination of a wheel rim of a flat-grooved
shape in cross section; of a cover having pockets in its edges; of two elastic hoops
or rings each having a socket formed on or fixed to one end in which the other end
slides; of sockets fixed at right angles to the aforesaid sockets and adapted to pass
through holes in the wheel rim; of set screws threaded in the said sockets and
impinge on the other ends of the elastic hoops or rings; and of an air tube for
inflating the tyre, as set forth.
T1
1000
ROBT. ED. PHILLIPS.