A Detachable Double Rim Tyre for the Wheels of Vehicles.
Year: 1893

page_text: Date of Application, 29th Nov., 1893
Complete Specification Left, 14th Feb., 1894-Accepted, 24th Mar., 1894
PROVISIONAL SPECIFICATION.
A Detachable Double Rim Tyre for the Wheels of Vehicles.
We, DANIEL LAFFAN, of 23 Avondale Avenue, Phibsborough, in the City of
Dublin, Ireland, Bookbinder, and GODFREY MOORE, of 17 Fownes Street,
Dublin, Ireland, Merchant, do hereby declare the nature of this invention to be as
follows:-
The object of our invention is to produce an improved detachable double rim
tyre for the wheels of vehicles, which will admit of being readily and conveniently
applied and removed-and it is especially designed for the purpose of providing for
the inconvenience arising from the natural and unequal expansion and contraction
occurring, in the metal composing the rim and the wood or framework of the
wheel.
According to the present system of applying rims to wheels, the usual flat shaped
metal rim is usually sprung on to the tyre and in practice there frequently occurs
an unequal expansion and contraction between the metal rim and the wooden frame,
caused sometimes by the shrinkage of the latter, and sometimes by the expansion of
the former.
This condition of things frequently causes the separation of the wheel frame,
from the metal rim, and consequent falling off, of the latter, thus rendering the
wheel unfit for use.
Our invention is designed to provide means for overcoming this inconvenience,
and to this end we propose in the first instance to form a rim of suitable section
and material provided with flanges, which when the rim is placed in position, will
overlap the sides of the felloes to a suitable depth, thus preventing the rim from
falling off.
Around this rim we then place a suitable band of steel, which together with the
metal rim just described, we secure to the felloes of the wheel by means of radial
bolts and nuts.
As thus constructed, it is obvious that this double rim tyre may be readily
applied, and should any unequal shrinkage or expansion occur, between the wood
and the double rim, the latter may be conveniently removed, and the annular space
created between the periphery of the wheel frame, and the first described metal rim
filled in, or padded with some suitable substance, and thus the rigidity of the wheel
maintained.
ALL of November 1893
J. K. FAHIE & SON,
9, Westland Row, Dublin, Agents for Applicants.
COMPLETE SPECIFICATION.
A Detachable Double Rim Tyre for the Wheels of Vehicles.
We, DANIEL LAFFAN, of 23 Avondale Avenue, Phibsborough, in the City of
Dublin, Ireland, Bookbinder, and GODFREY MOORE, of 17 Fownes Street,
Dublin, Ireland, Merchant, do hereby declare the nature of this invention and in
027

page_text: what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of our invention is to produce an improved detachable double rim
tyre for the wheels of vehicles, which will admit of being readily and conveniently
applied and removed; and it is especially designed for the purpose of providing for
the inconvenience arising from the natural and unequal expansion and contraction
occurring in the metal composing the rim, and the wood or framework of the
wheel.
According to the present system of applying rims to wheels, the usual flat shaped
metal rim is usually sprung on to the wooden frame, and in practice there frequently
occurs an unequal expansion and contraction between the former and the latter
caused sometimes by the shrinkage of the frame, and sometimes by the expansion
of the metal rim.
This condition of things frequently causes the separation of the wheel frame,
from the metal rim, and the consequent falling off, of the latter, thus rendering the
wheel unfit for use.
Our invention is designed to provide means for overcoming this inconvenience, and
to this end, we propose in the first instance to form a rim of suitable section and
material provided with flanges, which when the rim is placed round the felloes,
will overlap the sides of same to a suitable depth, thus preventing the rim from
falling off.
Around this rim we then place a suitable band of steel, or other suitable material,
which together with the metal rim first described, we secure to the felloes by means
of suitable radial bolts.
As thus constructed it is obvious that this double rim tyre may be readily
applied, and should any unequal shrinkage or expansion occur between the wood,
and the double rim, the latter may be conveniently removed, and the annular space
created between the periphery of the wheel frame, and the double rim tyre, filled in,
or padded with some suitable substance, and thus the rigidity of the wheel
maintained.
In order that our said invention may be more readily understood, and carried
into practice, we attach the accompanying sheet of drawings, in which Fig. 1, is an
elevation of an ordinary wooden wheel, showing the application of our improved
double rim tyre; and Fig. 2, a cross section (enlarged) of the felloe and double rim
tyre:-
a, is the wooden felloe; b, the first described flanged rim, which we propose
to form on a circular mandrel, partaking substantially of the formation of the wheel
to which the rim is to be applied.
The flanges of this rim embrace the sides of the felloes to a suitable depth as
shown in Fig 2, and consequently protect same from damage, while at the same
time preventing lateral movement, and in the event of any undue shrinkage in the
wooden frame, the rim will still be held firmly in position (by said flanges).
Again assuming that a shrinkage has occurred the defect may be easily and
conveniently remedied according to our invention by simply removing the outer
band or rim, and then undoing the jointed ends of the flanged rim which are simply
held together by suitable rivets, or small bolts and nuts and padding the annular
space created by the shrinkage with some suitable substance, whereupon the flanged
rim is again joined up, and the outer band or rim restored, and the rigidity of the
wheel thus preserved.
c, denotes the outer band or rim which is sprung on around the flanged rim b, in
the ordinary manner, and the two rims are secured to each other, and to the felloes
by the radial bolts d, which hold the whole firmly together.
Having now particularly described and ascertained, the nature of our said
invention and in what manner the same is to be performed, we would have it
understood, that what we claim is :-
The use and application of a double rim tyre for wheels of vehicles, consisting of

page_text: a flanged metal rim, surrounded by a flat metal rim or band, both being firmly
secured to each other and to the felloes of wheel by radial bolts, in the manner,
and for the purpose substantially as herein described and set forth.
Dated the 6th day of February 1894.
J. K. FAHIE & SON,
9, Westland Row, Dublin, Agents for Applicants.