An Improved Self-sustaining Apparatus for Hoists and other Lifting Appliances.
Year: 1889

page_text: Date of Application, 11th May, 1889
Complete Specification Left 11th Feb 1.800 Accepted, 22nd Mar
4000
PROVISIONAL SPECIFICATION.
An Improved Self-sustaining Apparatus for Hoists and other Lifting
Appliances.
I, JOHN TAYLOR, of the Firm of John Taylor and Sons, Queen's Road Nottingham,
Engineer, do hereby declare the nature of this invention to be as follows:-
This Invention has for its object improvements in the means of automatically
sustaining loads, while being raisel or lowered by Hoists and other Lifting
Appliances; so as to prevent the load from running down when the power is with-
drawn therefrom.
For this purpose, I have a cylindrical casting or outside casing; in the centre of
which the driving shaft of the Lifting appliance revolves in suitable bearings.
About midway along the length of this casing, I fix therein a disc ring concentric
with the driving shaft; and on each side of this ring, and sliding freely against it,
I have two other disc rings; also concentric with the shaft.
These two latter rings are carried and driven round in the casing by two or
more driving pins; each made with a collar bearing against the outer side of one
dise, and adjusting nuts or collars bearing against the outer side of the other outside
disc; to keep them in place.
One end of each of these driving pins is carried by a driving plate, turning on
a boss in the centre of the closed end of the casing; and through which the
driving shaft revolves. The other end of each of these driving pins is carried by
a pinion driving the Hoist or Lifting Appliance, or by a lift wheel carrying the
load direct on the driving shaft. Both the driving plate, and the pinion or lifting
wheel are loose on the boss and driving shaft respectively; but are capable of being
driven round by the shaft by two notched collars on the shaft; the notch in each
collar engaging with a stud or claw on the driving plate and pinion or wheel
respectively.
The action of the apparatus is as follows:-
When the driving shaft is being turned round to raise or lower the load; the
notched collars thereon drive the driving plate and pinion round with them simul-
taneously; in such a manner, that the driving pins are carried by them with their
centre lines exactly parallel with the centre line of the driving shaft; and these
pins in consequence cause the two disc rings to revolve freely, one on each side of
and parallel with the centre fixed disc ring; so as to allow the load to be raised or
lowered freely.
Immediately the driving shaft is stopped, the driving plate carrying one end of the
driving pins is stopped with it; and the weight of the load on the pinion or wheel,
carrying the other end of the pins, instantly turns this pinion or wheel slightly round
on the shaft; and throws the centre line of the driving pins out of parallel with
the centre line of the shaft.
This causes the two driving discs carried by the pins to firmly close on the centre
fixed disc; and thereby effectually grip the same; prevents the shaft and pinion
or wheel from moving, and holds the load securely suspended.
In some cases, where quick lowering is required, I hold the centre disc ring firm by
suitable brake strap embracing a flange or ring formed on the disc ring.
This ring turns in a bearing formed on the outside casing; and the action of the
whole is such that when the brake strap is closed tightly on the centre disc ring, it
irmly prevents it from moving; and thereby sustains the load as previously described;
nd on slackening the brake strap, the disc ring is allowed to turn freely round, so as
o lower the load as required.
Dated this Ninth day of May 1889.
HENRY W. HILL,
Agent for the said John Taylor.

page_text: COMPLETE SEIT
An Improved Self-sustaining Apparatus for Hoists and other Lifting
Appliances.
I, JOHN TAYLOR of the Firm of John Taylor and Sons, Queens Road Nottingham,
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 has for its object improvements in the means of automatically 5
sustaining loads, while being raised or lowered by Hoists and other Lifting
Appliances; so as to prevent the load from running down when the power is with-
drawn therefrom.
For this purpose, I have a cylindrical casting or outside casing; in the centre of
which the driving shaft of the Lifting appliance revolves in suitable bearings. About
midway along the length of this casing, fix therein a disc ring concentric with the
driving shaft; and on each side of this ring and sliding freely against it, I have two
other disc rings also concentric with the shaft. These two latter rings are carried
and driven round in the casing, by two or more driving pins; each made with a
collar bearing against the outer side of one disc, and adjusting nuts or collar bearing 1
against the outer side of the other outside disc; to keep them in place. One end of
each of these driving pins, is carried by a driving plate, turning on a boss in the
centre of the closed end of the casing; and through which the driving shaft
revolves. The other end of each of these driving pins is carried by a pinion
driving the Hoist or lifting appliance, or by a lift wheel carrying the load direct
on the driving shaft. Both the driving plate and the pinion or lifting wheel are
loose on the boss, and driving shaft respectively; but are capable of being driven
round by the shaft, by two notched collars on the shaft, the notch in each collar
engaging with a stud or claw on the driving plate and pinion or wheel respectively.
The action of the apparatus is as follows:-When the driving shaft is being
turned round to raise or lower the load, the notched collars thereon, drive the
driving plate and pinion round with them simultaneously, in such a manner, that
the driving pins are carried by them with their centre lines exactly parallel with
the centre line of the driving shaft; and these pins in consequence cause the two
disc rings to revolve freely, one on each side of and parellel with the centre fixed
disc ring; so as to allow the load to be raised or lowered freely.
Immediately the driving shaft is stopped the driving plate carrying one end of
the driving pins is stopped with it; and the weight of the load on the pinion or
wheel, carrying the other end of the pins, instantly turns this pinion or wheel
slightly round on the shaft, and throws the centre line of the driving pins, out of
parallel with the centre line of the shaft.
This causes the two driving discs carried by the pins to firmly close on the centre
fixed disc, and thereby effectually grip the same, prevents the shaft and pinion or
wheel from moving, and holds the load securely suspended.
In some cases where quick lowering is required, I hold the centre disc ring firm
by a suitable brake strap, embracing a flange or ring formned on the disc ring. This
ring turns in a bearing formed on the outside casing; and the action of the whole is
such, that when the brake strap is tightly closed on the centre disc ring, it firmly
prevents it from moving, and thereby sustains the load-as previously described; and
on slackening the brake strap, the disc ring is allowed to turn freely round, so as to
lower the load as required. And in order that my invention may be more fully
understood, and readily carried out and into effect; I will proceed to describe the
accompanying sheet of drawings; reference being had to the letters and figures
marked thereon.
Figs. 1 and 8 are longitudinal sectional elevations of my improved apparatus.
Figs. 2 and 9, are transverse sectional elevation side views of the same, the uppe
part shewn looking towards driving disc F. in Figs. 1 and 8-and the lower par
looking towards the disc ring E-in Figs. 1 and 8.

page_text: Figs. 3 and 10, are also a transverse sectional elevation side views of the same.
the upper part shown looking towards the pinion or lifting wheel C,-in Figs. 1
and 8, and the lower shown looking towards the driving disc E-in Figs. 1 and 8.
Fig. 4 is a side elevation of the bearing end of the casing B-in Figs. 1 and S.
Fig. 5 is a side elevation of the driving pulley C.
Fig. 6, is a side elevation of my invention as applied to one form of lifting
machine, where quick lowering is required, as hereafter explained.
Fig. 7, is a front elevation of the same machine with the upper part in section.
Similar letters refer to similar parts throughout the several views.
In these drawings, B is the cylindrical casting or outside casing, in the centre of
which the driving shaft A, of the lifting appliance revolves in suitable bearings; one
bearing B, I prefer to make in one piece with the casing B, and this. bearing B¹
being attached to the frame of the machine, holds casing B, stationary. About
midway along the length of this casing, fix therein, by means of screws N. N,-or
other suitable means a disc ring D, concentric with the driving shaft A; and on
each side of this ring D, and sliding freely against it, I have two other disc rings E
and E', also concentric with the shaft A. These two latter rings are carried and
driven round in the casing B by two or more driving pins H and K, each made
with a collar H2, and K', hearing against the outer side of one disc E, and
adjusting nuts or collars H', and K', bearing against the outer side of the other
outside disc E', to keep them in place. One end of each of these driving pins H
and K is carried by a driving plate F, turning on a boss 132 in the centre of the closed
end of the casing B; and through which the driving shaft A revolves. The other
end of each of these driving pins Hand K is carried by a pinion C, driving a hoist
or lifting appliance; or by a lift wheel carrying the load direct on the driving
shaft A. Both the driving plate F, and the pinion C, or lifting wheel-are loose on
the boss B and driving shaft A, respectively, but are capable of being driven round
by the shaft A, by two notched collars G and G on the shaft A; the notch in each
collar G and G', engaging with a stud or claw F' and C, on the driving plate F, and
the pinion C or wheel respectively.
The action of the apparatus is as follows:-
When the driving shaft A is being turned round to raise or lower the load, the
notched collars G and G¹ thereon drive the driving plate F, and the pinion Cround
with them simultaneously; in such a manner, that the driving pins H and K, are
carried by them with their centre lines exactly parallel with the centre line of the
driving shaft A. And these pins H and K in consequence cause the two disc rings E
and E, to revolve freely; one on each side of and parallel with, the centre fixed dise
ring D; so as to allow the loal to be raised or lowered freely. Immediately the
driving shaft A is stopped, the driving plate F carrying one end of the driving
pins, H and K is stopped with it, and the weight of the load on the pinion C or wheel,
carrying the other end of the pins H and K instantly turns this pinion C or wheel
slightly round on the shaft A; and throws the centre line of the driving pins H
and K out of the parallel with the centre line of the shaft A; this causes the two
driving discs E and E' carried by the pins H and K to firmly close on the centre
fixed disc D; and thereby effectually grip the same, prevents the shaft A and
pinion from moving, and hold the load securely suspended. In some cases, instead
of pins H with the collars H2, and adjusting nuts H³, I use slotted driving pins, H, H',
shewn in Figs. 8, 9 and 10.
In cases where quick lowering is required, I hold firm the centre disc ring D by a
suitable brake strap S, embracing a flange or ring D₁ formed on disc ring D, as
shewn in Figs. 6 and 7 of the accompanying drawings. These Figs. 6 and 7
represent my invention as applied to one form of lifting machine; wherein casing B,
enclosing the self sustaining apparatus is carried on the standard L, by means of
bearing B, in which revolves one end of driving shaft A, the other end of which
turns in a bearing B³, bolted to standard M. O is a hand rope driving wheel; keyed
on shaft A.
The driving pinion C, gears into a large spur wheel P fixed to shaft R
turning in suitable bearings on standards L, M. On shaft R is also fixed the lifting

page_text: drum driven by spur wheel P; and on which drum the rope or chain is wound
and unwound for raising or lowering the load attached to samie. In ordinary work,
when raising or lowering loads, disc ring D is held firm, and prevented from turning
by the brake strap, S, being tightened on the flange D₁, by the screwed brake axle T',
and brake chain wheel V; or other usual means, bringing together ends S' and S² of
brake strap S. Axle T turns in bearing W, suspended from one of the stays U,
which brace standards L and M together. When ring D is so held, the load is
always self-sustained, when being raised or lowered-as previously explained-by
turning the hand rope driving wheel O. When the load is desired to be lowered
quickly, brake wheel V, and axle T, are turned round to unscrew apart ends S¹
and S by which means brake strap S, is slackened from flange D³, which then
turns freely round on bearing, on casing B,-as shewn,-carries round with it
rings D, E and E, pins H and K, driving plate and pinion C. and so allows the
load to be lowered quickly or slowly, according as brake strap $ is slackened off to
free disc ring D. D. I sometimes employ a friction cone brake, to render the dise
ring D, D, fixed or movable at will, instead of the brake strap shown.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed and constructed; I declare
that what I claim is :-
1. In the construction of self-sustaining hoisting and other analogous machinery,
the use and application of friction rings working one on each side of a fixed disc
ring and driven round alongside and concentric with this ring by driving pins,
driving plate, and lifting wheel; by means of projections or carriers on
revolving shaft, carrying the lifting wheel, for automatically arresting the motion
of the same by friction, in the manner and substantially as shewn and described
herein, and by the accompanying drawings.
al
2. In self-sustaining appliances, such as are referred to in the first claim, the
use and application of means whereby the dise ring D, D' is made fixed, or
movable at will, by a friction brake or cone acting on '; for the purposes
herein before described, and substantially as shewn in Figs. 6 and 7 of the accom-
panying drawings.
3. The general constructions, combinations and arrangements, of the several
parts constituting my improvements in the construction of self-sustaining hoisting
and other analagous machinery; substantially as hereinbefore described and shewn
in Figs. 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 of the drawings herewith.
Dated this Tenth day of February 1890.
HENRY WALKER HILL,
Agent for the said John Taylor.