A New or Improved Tyre Lever.
Year: 1897

page_text: A New or Improved Tyre Lever.
We, HENRY BEACH, of 11, Fortess Road, Kentish Town, London, N.W., Engineer,
and LEWIN HERBERT, also of 11, Fortess Road, aforesaid, Cycle Engineer, do hereby
declare the nature of this invention to be as follows:-
:-
The majority of pneumatic tyres now in use are of what is known as the wired-on
type, that is the tyre is held within the rim by means of annular rings of wire, one
such for example being connected to each edge of the tyre, while the diameter of each
annulus of wire is such, that it will not pass over the outer peripheral edge of the
rim, until one part of the diameter of the annulus, is placed at the base of the
interior of one side of the rim, when the side of the annulus diametrically opposite
thereto can be lifted over the said peripheral edge of the rim.
To effect the operation of lifting this part of the wire annulus over the edge of the
rim, it has been found convenient, and in some cases necessary, to employ a lever, the
end of which can be inserted under the wire, the outer edge of the rim is then
utilized as a fulcrum, and this part of the wire is lifted or "prized" over the said rim
edge, and levers for this special purpose have been manufactured and are well known.
Difficulties and disadvantages however have been experienced in the employment
of such a lever, because when the wire has been thus lifted at one part over the rim edge,
there has not been sufficient length (so lifted) to enable the operator to grasp the edge
of the tyre to further remove it from the rim, and it is common to employ some other
instrument to aid in completing the removal of the wired edge; and even when this
expedient is resorted to it is difficult if not impossible for a single operator to manage
both instruments at the same time; moreover, the fact of employing a single lever
to effect the raising of the wire, causes the latter to be distorted from its true circular
shape by the pressure of the lever acting upon one point of the wire.
Now the object of our invention is to overcome these difficulties and disadvantages,
to which end we provide an instrument having two lifting arms at a distance apart,
the acting ends of such arms having hooked surfaces which we arrange at such angles
that the wire at these two points can lie therein while being lifted at both points
simultaneously.
The two arms or members, we generally pivot together in order that the arms may
be folded on each other when not required for use; although we would have it under-
stood that we do not limit ourselves to so jointing the parts, as in use the instrument
would be equally effective if both the diverging arms were made from a single piece
of metal.
The ends of the arms are formed of somewhat hook shape with a double curvature.
The groove of the hooked end, is adapted to the curvature of the wire in the tyre,
and also we make the hooked ends extend at an angle to the plane of the flat portions
of the arms.
By this construction the hooked ends of the arms upon being inserted beneath the
wire, fit, and are adapted to the curvature thereof, and the wire can be raised by the
leverage of the arms against the edge of the rim as a fulcrum, and this without
distorting the wire.

page_text: When raised in this manner over the edge of the rim, the operator can conveniently
seize with his disengaged hand, that part of the wired edge extending between
the hooked ends of the instrument and pull the said edge over the rim with the
greatest ease, thereby detaching the tyre from the rim.
The tyre may be replaced by reversing the instrument so as to rest the hooked
parts upon the edge of the rim.
The instrument can be closed up and placed in the pocket or tool bag.
We, HENRY BEACH, of 11, Fortess Road, Kentish Town, London, N.W., Engineer,
and LEWIN HERBERT, also of 11, Fortess Road, aforesaid, Cycle Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following state-
ment:
"
The majority of pneumatic tyres now in use are of what is known as the "wired
on type that is, the tyre is held within the rim by means of annular rings of wire,
one such, for example, being connected to each edge of the tyre, while the diameter
of each annulus of wire is such that it will not pass over the outer peripheral edge
of the rim until one part of the diameter of the annulus is placed at the base of the
interior of one side of the rim, when the side of the annulus diametrically opposite
thereto can be lifted over the said peripheral edge of the rim. To effect the opera-
tion of lifting this part of the wire annulus over the edge of the rim, it has been
found convenient, and in some cases necessary, to employ a lever the end of which
can be inserted under the wire. The outer edge of the rim is then utilized as a ful-
crum, and this part of the wire is lifted or "prized" over the said rim edge, and
levers for this special purpose have been manufactured and are well known.
Difficulties and disadvantages have, however, been experienced in the employment
of such a lever, because when the wire has been thus lifted at one part over the rim
edge there has not been sufficient length so lifted to enable the operator to grasp the
edge of the tyre to farther remove it from the rim, and it is common to employ some
other instrument to aid in completing the removal of the wired edge, and even when
this expedient is resorted to it is difficult, if not impossible, for a single operator to
manage both instruments at the same time. Moreover, the fact of employing a
single lever to effect the raising of the wire causes the latter to be distorted from its
true circular shape by the pressure of the lever acting upon one point of the wire.
Now the object of my invention is to overcome these difficulties and disadvantages,
to which end I provide an instrument having two lifting arms at a distance apart,
the acting ends of such arms having hooked surfaces which I arrange at such angles
that the wire at these two points can lie therein while being lifted at both points
simultaneously.
Fig. 1 of the drawings shews my improved appliance or tool in elevation; Fig. 2
in plan; Fig. 3 with one member folded on the other for convenience of transport.
Fig. 4 is a detail view. Fig. 5 is a perspective view shewing the application of the
hooked ends to a circular wire.
A A, Fig. 1, are the two arms or members which I generally pivot together at A¹
in order that the arms A A may be folded on each other, as shewn at Fig. 3, when
not required for use, although I would have it understood that I do not limit myself

page_text: to so jointing the parts, as in use the instrument would be equally effective if both
the diverging arms were made from a single piece of metal.
The ends B C of the arms A A are formed of somewhat hook shape with a double
curvature, as shewn, especially at Fig. 4, which is an edge view of one of the arms
at the hook end thereof. The groove of the hooked end, as at Fig. 1, is adapted to
the curvature of the wire in the tyre, the wire and a portion of the tyre being
indicated by dotted lines, and also I make the hooked ends B C extend at an angle
to the plane of the flat portions of the arms A A, as shewn at Fig. 2. By this con-
struction the hooked ends of the arms, Fig. 1, upon being inserted beneath the wire
fit and are adapted to the curvature thereof, as at Fig. 5, and the wire can be raised
by the leverage of the arms against the edge of the rim as a fulcrum, and this
without distorting the wire. When raised in this manner over the edge of the
rim, the operator can conveniently seize with his disengaged hand that part of the
wired edge extending between the hooked ends B C of the instrument and pull
the said edge over the rim with the greatest ease, thereby detaching the tyre from the
rim.
The tyre may be replaced by reversing the instrument so as to rest the hooked
parts BC upon the edge of the rim.
The instrument can be closed up and placed in the pocket or tool bag.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, we declare that what we claim
is :-
1. A tyre-lever for removing wired-on elastic tyres from wheel rims, composed of
two arms, a joint-pin connecting the arms near the ends thereof, to allow the arms
to diverge at their free ends, and hook-shaped parts formed at the free ends of the
arms, adapted to be inserted beneath the wire of the tyre to lift same at two points
simultaneously over the rim edge, and to allow the operator to seize the wire ex-
tending between the two hook parts.
2. In tyre-levers, the combination with the two arms, and a joint-pin connecting
the arms near the ends thereof, of hook-shaped parts at the free ends of the arms at
proper relative angles to coincide with the curvature of the wire as set forth.
Deted the 0th
T1000
BREWER & SON,
London and Leeds, Agents for the Applicants.
BREWER & SON,
London and Leeds, Agents for the Applicants.