Improvements in Friction-clutch and Brake Mechanisms, Applicable for Derrick or other Cranes and for similar other Purposes
Year: 1888

page_text: Date of Application, 12th June, 1888
Complete Specification Left, 23rd Oct, 1888
Complete Specification Accepted, 30th Nov,
1888
Improvements in Friction-clutch and Brake Mechanisms, Applicable
for Derrick or other Cranes and for similar other Purposes
We, RICHARD LONGDEN HATTERSLEY of Keighley in the County of York,
Machine Maker and ROBERT HALL of the same place, Machine Brokei do hereby
declare the nature of this invention to be as follows, that is to say
-
It relates to improvements in friction-clutch and in brake mechanisms applicable for
derrick or other cranes and for similar other purposes and consists of constructing
and arranging the parts forming said clutch and brihe mechanisms in such a minner
that they shall operate moro efficiently
Respecting the friction clutch mechanism we make use of the well known rim
which is attached to or formed on a bevil or other wheel or which may form in
ordinary driving pulley by having its outer periphery arranged to be operated by a
driving belt or band as is well known This rim, whether attached to the bevil or
other wheel, or forming the driving pulley, has continuous rotary motion imparted to
it in the well known manner
Now the object of our invention is to employ means that will readily and efficiently
couple this continuous rotary-rim to the shaft upon which it loosely runs when not so
coupled, so that its rotary motion may be imparted to this said shaft and yet, by said
means, be, under any circumstances, as readily uncoupled, to arrest the rotary
motion of said shaft, in this manner entirely voiding the posibility of damage being
done, as by breakages etc, caused by one part becoming locked or wedged fast in
the other through rust, corrosion or otherwise, as is the case with friction clutches
heretofore employed
Upon the horizontal shaft and beneath or within the rotary-rim above described, is
keyed a suitably shaped drum, around one edge of which are formed projections in a
suitable manner to enter corresponding recesses formed in two segmental pieces that
are arranged to fit the outer periphery of sud drum against which they are heid by
means of springs
In suitable positions lengthwise in the rim of the above described drum, are formed
two slots into each of which is inserted a triple-inclined piece or triple-wedge, one

page_text: inclined surface of each of which projects within the inner periphery of sud drum,
the two other inclined surfaces projecting outwardly from the outer periphery so that
they may be in contact with the two outer ends of the two segmental pieces above
described
From the above description it will bo seen that when a suitably shaped conical bush
which is mounted upon the horizontal shaft above described, and which is operited by
a lever, screw or otherwise as may be desired, is moved and pressed within the inner
periphery of the above described drum so that its inclined surface shall come in
contact with the inner inclined edges of the triple-wedges, these triple-wedges will be
forced outwards, so also will the segmental pieces, by which means the outer
peripheries of these segmental pieces are pressed into contact with the inner periphery
of the continuously revolving rim, the friction, caused thereby, imparting rotary
motion to sad segmental pieces which by their recesses and the projections on the
herein before described drum, simultaneously impart it (said rotary motion) to the
horizontal shaft
By the withdrawal of the conical bush, the springs, which always tend to hold the
segmental pieces gunst the drum as above described, will draw suid pieces out of
contact with the revolving rim and so the rotary motion of the shaft will bo
arrested
Respecting the brake mechanism, we make use of the usual and well known biake
wheel and metal or other strap, and to each of the outer ends of this strap we hinge a
suitably shaped lever, these levers being mounted upon the framework in suitable
proximity to each other Between the outer arms of these levers is mounted an
appropriately formed eccentric to which is attached lever having at its outer end a
foot-step or pedal, by which means, through the eccentric operating the levers and the
brake strap, by very slight pressure on the pedal considerable friction may be
caused upon the brake wheel The usual spring arrangement is employed for
reversing the above described actions
In order to hold the above described pedal in position when it has been moved to
operate the brake, a suitable notched bar and catch arrangement is employed in the
usual well known manner, however this arrangement is such that by a supplementary
pedal and connecting rod same may be very readily disengaged without rendering it
necessary for the operator to handle it
By the employment, in connection with derrick or other cranes, of the friction-
clutch and brake mechanisms constructed and arranged as herein described, the
operations of same are considerably facilitated, and the possibility of accidents caused
by any over-winding thereof is almost entirely avoided
Dated this 11th day of Tune 1888

page_text: DAMZARWA
We, RICHARD LONGDEN HATTERSLEY of Keighley in the County of York, Machine
Maker, and ROBFRT HALL of the same place, Machine Broke 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, that is
to say
-
It relates to improvements in friction-clutch and in brake mechanisms applicable for
derrick or other cranes and for similar other purposes, and consists of constructing
and arranging the parts forming sud clutch and brake mechanism in such a manner
that they shill operate more efficiently
In the accompanying sheets of drawings fig 1 is a cross sectional view of the parts
forming the friction-clutch, fig 2 is a longitudinal section of same, while figs 3, 4, 5
and 6 are detail drawings of parts hereinafter referred to
Figs 7 and 8 are side and end views respectively illustrating the brake mechanisms
The framework in each of said views being omitted so that the other parts might be
more clearly shewn
Similar letters of reference indicate similar parts throughout the several views
Respecting the friction clutch mechanism, we make use of the well known rim a
which is attached to or formed on a bevil or other wheel or which may form an
ordinary driving pulley 6 by having its outer periphery arranged to be operated by a
driving belt or bind in the manner common and well known This rim, whether
attached to the bevil or other wheel or forming the driving pulley b, has continuously
rotary motion imparted to it in the well known manner
C
The object of our invention is to supply means that will readily and sufficiently
couple this continuously rotary rim a to the shaft c upon which it loosely runs when
not so coupled, so that its rotary motion may be imparted to this said shaft and, by
said means, be, under any circumstances, as readily uncoupled to arrest the rotary
motion of said shaft c in this manner entirely avoiding the possibility of damage being
done through breakages etc caused by one part becoming locked or wedged fast in
the other through rust, corrosion or otherwise, as is the case with friction clutches
heretofore employed

page_text: с
Upon the shaft c and beneath or within the rotary-11m a is keyed the drum d which
18 formed as shewn, having formed around one of its edges the projections e which
are arranged to enter corresponding recesses formed in the segmental pieces ff¹ (see
fig 5) said pieces ff1 being formed to fit the outer periphery of the drum d against
which they are respectively held by the springs 9 g¹
In the mm d of the drum d are formed the slots h h¹ into which are inserted the
triple-inclined-pieces or triple-wedges ¹ respectively (see fig 6), the inclined
surfaces 1 and 2 on sud wedges 1 k respectively projects within the inner periphery
of the rim d¹ the other two inclined surfaces 3, 4 and 5, 6 respectively, being made
to project outwardly therefrom so that they may be in contact with the two outer ends
of the two pieces fƒ³
From the above description it will be seen that when the conical bush which 18
mounted so that it may be slided or moved, by being operated with a forker lever,
screw or other well known device, as well as so that it will revolve upon the shaft c, 18
moved and pressed within the rim d¹ so that its inclined surface shall come in contact
with the inner inclined edges 1, 2 of the wedge h. 1, these wedges will be forced
outwards in the directions indicated by the arrows 7, 8 as also will the pieces ff¹ be
forced outwards by the actions of the inclined surfaces 3, 4 and 5, 6, theroon, but in
the direction indicated by arrows 9, 10, by which means the outer peripheries of the
pieces ff are pressed into contact with the inner periphery of the continuously
revolving rim a, the friction, caused thereby, imparting rotary motion to the pieceff
which by their recesses receiving the projections e simultaneously, impart it (said
rotary motion) to the shaft c
By the withdrawal of the bush 7, the springs 9 g¹ which are arranged so that they
will always tend to hold the pieces ff against the drum d, are permitted to withdraw
said pieces ff out of contact with the revolving rim a in this manner ceasing to
impart rotary motion to the shaft c
Respecting the brake mech inism, we make use of the usual ɩnd well known brake
wheel m and metal or other strap n, to each of the outer ends of which (strap n) we
hinge a suit ibly shaped lever o o¹ the same being mounted by the pivotal pins p, p¹
respectively upon the framework Between the outer arnis of the levers p p¹ is
mounted an appropriately formed eccentrics which is attached to the lever t mounted
at t upon the fiamework To this levert is loosely attached the foot-step or pedal u,
by which means, through the eccentric s operating the levers ppl and the strap n, by
a very slight pressure on the pedal u considerable friction miy be caused upon the
brake wheel m The counterbilancing weight being employed for effecting a
reversion in, or rule ising the wheel m from the actions of the strap n as will be readily
understood Or in place of the weight being employed any of the well known
airangements of springs may be used
In order to hold the above described pedal u in position when it has been moved to
operate the levers p p³, the notched guide piece w, which is attached to the framework,
and the catch a are employed
This catch is hinged at ¹ to the levert and has a tail-piece a² so formed that it
may be moved or operated by the pedal u as shewn in broken lines fig 7, as and
whenever desired, (the reverse movement being effected by the springy) the movement
of said pedal u being effected by the foot of the operator obviates the necessity of said
operator leaving other manually operated parts of the machinery to perform said
movement of the pedal u by his hands
When the friction clutch and brake mechanisms, constructed as herein before
described, are used in connection with derricks or other cranes the operations of these
cranes may be more easily controlled by the operator and the possibility of accidents
caused by any overwinding thereof is almost entirely avoided
It will readily be seen that the above described friction-clutch and brake mechanisms
either separately or together are applicable with equal advantages for other machines
than those referred to

page_text: Having now particularly described and'ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is
1 In a friction clutch the combination of the tripple-inclined pieces k k¹, the drum d
having a rim & formed as shewn, the segmental pieces ff¹, the springs 9 g, the conical
plug and pulley or wheel having a rim a, the same being formed and arranged to
operate in the manner and for the purposes substantially as herein specified
1
2 In brake mechanism the combination of the strap n formed as shewn, the
levers oo¹, the eccentric s lever t, pedal u, the catch having tail-piece ³, the
notched bar w and the spring y, the same being constructed and arranged to operate
substantially as heroin specified and to the end set forth