Improvements in Friction Clutches for Transmitting Motion to Haulage Wheels and other Mechanism.
Year: 1899

page_text: Date of Application, 12th Apr., 1899
Complete Specification Left, 13th Dec., 1899-Accepted, 17th Feb., 1900.
Improvements in Friction Clutches for Transmitting Motion to
Haulage Wheels and other Mechanism.
We, LANCELOT DOBINSON, of Park View, Stanley, near Wakefield, in the
County of York, Mining Engineer, and RALPII WILLIAMSON, of Conisborough,
in the County of York, Mechanical Engineer, do hereby declare. the nature of
this invention to be as follows:-
This invention relates to means or apparatus for transmitting motion to
haulage friction wheels, such as are employed for colliery purposes, but tliese
improvements may be employed for other purposes where it is required to
intermittently or continuously transmit motion by means of friction driving
mechanism.
According to this invention, and which for the purpose of clearly showing
its application we will describe applied to a haulage friction wheel, which we
desire should simply be taken as an illustration, the haulage wheel is provided
with a circular projecting friction pan provided with a steel or other suitable
lining. Within the friction pan is mounted a friction ring made in two or
more parts, preferably in halves. Each half or part of the friction ring is
provided with a box like or other recess in which works the end of the driver
fixed to a hub or boss mounted on the haulage wheel shaft. In the friction
ring, on each face or side thereof may be fixed,-by, say, set screws, or bolts
and nuts, or their equivalents,--a plate for closing each of the recesses.
plates may, or may not, be let into the surface or sides of the friction ring,
and they are employed so that the ends of the driver may be readily and easily
inserted in the recess or removed therefrom at pleasure. By this means it will
be readily seen that the frictional parts of ring is carried clear of the friction
pan on wheel to be driven either vertically or horizontally, thereby, reducing
the frictional wear to a minimum.
4
The
The ends of the halves or parts of the friction ring are inclined, and each
inclined end is provided with a dovetail recess running the full length of the
inclined face. In each dovetail recess is made to slide freely a projection which
fits the said recess, as well as forming a portion of a wedge which is inserted
and arranged to work between each pair of inclined ends of the halves or
portions of the friction ring. By this means the friction ring is readily drawn
clear of the friction pan so as to reduce the wear and tear of the two parts to
a minimum, as well as to prevent undue strain thereon. The number of wedges
having dovetail projections thereon and drivers varies in accordance with the
number of portions into which the friction ring is divided. Thus, for example,
if the friction ring is divided into halves, then two only of such wedges and
drivers would be required.
These wedges are adjustably connected to a sliding boss or carrier, mounted
on the haulage wheel shaft by means of adjustable rods or links, jointed
respectively to the wedges and to the sliding carrier and having screwed ends
arranged to work in swivelling nuts interposed between the wedges and the

page_text: sliding boss. By this means the wedges may easily be adjusted to their work
without removing the wedges or rods from between, or their contact with, the
inclined ends of the portions of the friction ring. Whenever the sliding carrier
is moved inwards the wedges and dovetails are forced towards the pan thereby
causing the wedges to travel upon the inclined ends of the portions of the
friction ring for causing its periphery to be forced into frictional contact with
the pan for driving the wheel.
The above described frictional mechanism may be employed for driving
purposes other than haulage wheels.
Dated this Tonth day of I 1900.
Improvements in Friction Clutches for Transmitting Motion to
Haulage Wheels and other Mechanism.
We, LANCELOT DOBINSON, of Park View, Stanley, near Wakefield, in the
County of York, Mining Engineer, and RALPH WILLIAMSON, of Conisborough,
in the County of York, Mechanical Engineer, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:
This invention relates to means or apparatus for transmitting motion to
haulage friction wheels, such as are employed for colliery purposes, but these
improvements may be employed for other purposes where it is required to
intermittently or continuously transmit motion by means of friction driving
mechanism.
The invention is shown in the annexed drawings applied to a haulage friction
wheel such as is used for colliery purposes, but we distinctly wish it to be
understood that this is to be taken simply as an illustration of how the inven-
tion may be carried into practice. The invention consists essentially of combining
with, say, a haulage wheel, having a friction pan or recess corresponding there-
with, provided with a steel or other lining, a friction ring made in two or
more parts. Each of said parts is provided with a box-like or other recess in
which works a driver fixed to a hub or boss mounted on the haulage wheel
shaft, and also with inclined ends having dovetailed recesses formed therein in
and against which wedges constructed as hereafter described are arranged to
work. The wedges are connected adjustably to sliding boss mounted on the
haulage wheel shaft, whereby, on the wedges being forced between the inclined
ends of the friction ring it will be brought into frictional contact with the
friction pan.
In the drawings hereunto annexed,
Fig. 1, is a front elevation of a haulage wheel with the friction pan, ring,
and expanding wedges applied, but with the sliding boss and adjustable con-
necting rods removed.
Fig. 2, a sectional elevation of haulage wheel with our invention applied.
Fig. 3, an elevation of a portion of a friction ring constructed according to
this invention.
Figs. 4 and 5 are respectively part elevations of friction rings showing the
position and formation of the recesses therein for the reception of the expanding
wedges.
Like parts in all the views are marked with corresponding letters of reference.
A is a haulage wheel of ordinary construction mounted upon the shaft B in

page_text: the usual manner. Ca friction pan also of ordinary construction, and which
may, or may not, be provided on its inner periphery with a steel or other
suitable lining. The friction pan is shown in the drawings without a lining
and cast or otherwise made to form part of the haulage wheel A, but we would
distincuy have it understood that if so desired the friction pan may be bolted
or otherwise fixed to the arms or spokes a of the haulage wheel.
Within the friction pan C is mounted a friction ring D, made in two or
more parts, preferably in halves, as shown in the drawings. Each half or part
of the friction ring D is provided with a box like or other recess E in which
works the end of the driver F fixed to a hub or boss G, mounted on the haulage
wheel shaft B. The driver and its hub or boss is shown made in halves and bolted
together. On or in the friction ring on one or both faces may be fixed,-by,
say, set screws, or bolts and nuts, or their equivalents H, a plate I for closing
each of the recesses E. The plates I are either let into the surface or sides of
the friction ring 1 or fixed thereon as shown, and they are employed so that
the ends of the driver may be readily and easily inserted in the recess or
removed therefrom at pleasure. In the drawings a plate I is shown fixed to
one side only of the friction ring 1), and the boss or hub G of the driver is
made to impinge upon the boss or hub of the haulage wheel A, thereby pre-
venting the end of the driver working laterally away from plate I and out of
position. But when required a plate I may be fixed on both sides of the ring D.
By this means it will be readily seen that the frictional parts of ring D are
carried clear of the friction pan Con wheel to be driven either vertically or
horizontally, thereby reducing the frictional wear to a minimum; at the same
time providing a ready means for obtaining access to and removal of the parts.
The end of each half or part of the friction ring D is inclined as shown at d
Fig. 1, and each inclined end is provided with a dovetail or T or other shaped
recess J, running the full lengtli, and parallel with the inclined face d.
recess J dovetailed in cross section is shown at Fig. 4, whilst a T shaped
recess, in cross section, is shown at Fig. 5. But it is not essential that these
recesses should be either dovetailed or shaped in cross section, as any other
shape that is larger in cross section at the deepest point or is provided with
an enlargement between the inner periphery of the friction ring D and the
depth of the recess will act equally as well. In each dovetail or other shaped
recess J is made to slide freely a projection K which is shaped to fit the said
recess, as well as forming a portion of a wedge K¹ which is inserted and arranged
to work between each pair of inclined ends d of the halves or portions of the
friction ring D as shown at Fig. 1. By this means the friction ring D is readily
drawn clear of the friction pan so as to reduce the wear and tear of the two
parts to a minimum, as well as to prevent undue strain thereon.
A
The number of wedges K¹ armed with projections K and the drivers F varies
in accordance with the number of portions into which the friction ring D) is
divided. Thus, for example, if the friction ring I is divided into two portions,
as shown at Fig. 1, then two only of such wedges K¹ and drivers would be
required. The wedges K' are adjustably connected to a sliding boss or carrier L,
mounted so as to slide freely on a key fixed in or on the haulage wheel
shaft B, by means of adjustable rods or links M, Fig. 2, jointed respectively
at one end to a lug formed on the wedges K' and at the opposite end of a
lug formed on the carrier L and having screwed ends arranged to work in
lock or other nuts N having right and left hand screw threads cut therein
interposed between the wedges and the sliding boss. By this means the wedges
may be easily and accurately adjusted to their work without removing the
wedges or rods from between or out of contact with the inclined ends d of the
portions of the friction ring 1). Whenever the sliding carrier L is moved
inwards by a bifurcated or other lever (not shown in the drawings) one end of
which is arranged to work in the groove 7 of the said carrier, the wedges K¹
and dovetail or other shaped projections K are forced towards the friction pan C

page_text: thereby causing the wedges to travel outwards-that
away from shaft B upon
the inclined ends d of the portions of the friction ring D and causing its peri-
phery as it were to expand and be forced into frictional contact with the said
pan C for driving the wheels A.
It will be readily understood that the above described frictional mechanism
consisting essentially of a ring or recess, corresponding to the pan C, the friction
ring. made in parts with box like recesses and inclined ends, and recessed
as described, wedges K₁ adapted to fit said inclines and their recesses and a
movable sliding carrier L adjustably connected to said wedges may be employed
for driving purposes other than haulage wheels.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that we
are aware that previous to the date of this application haulage wheels armed
with friction pans provided with expanding friction rings have been used and
we make no claim to such except when constructed and arranged in the manner
before described and illustrated, and what we do claim is:-
1. In friction clutch. mechanism such as herein described the friction rings
formed in parts with a box like or other recess formed as described in each part
and with each said parts inclined and recessed in combination with wedges
armed with projections adapted respectively to work against the said inclined
ends and to fit the said recesses, all arranged substantially as herein described
and illustrated and for the purposes set forth.
2. The combination with a haulage wheel of the friction clutch mechanism
as described, consisting essentially of a friction pan, such as C, having a friction
ring, such as D formed in parts working therein, each part of said friction
ring being provided with a recess with or without a covering plate such as I,-
to receive the end of driver, such as F, and with inclined ends having recesses,
such as J, formed therein, wedges, such as K¹, armed with projections, such
as K, adapted respectively to work against said inclined ends, and to fit the
recesses therein, and a sliding carrier, such as L, mounted upon the same shaft
as the haulage wheel and adjustably connected by rods, such as M, and nuts,
such as N, to the said wedges, all arranged and operating substantially as
herein described and for the purposes set forth.
3. The combination and arrangement of parts constituting the friction clutch
for transmitting motion to haulage wheels and other mechanism substantially
as described and illustrated.
T
1
11 .
T
1
1000
RALPH WILLIAMSON.
LANCELOT DOBINSON.