Improvements in Apparatus for Raising, Lowering, and Conveying or Transporting Loads.
Year: 1897

page_text: Date of Application, 17th June, 1897
Complete Specification Left, 15th Apr., 1898-Accepted, 17th June, 1898
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Raising, Lowering, and Conveying or
Transporting Loads.
We, Josepii TEMPERLEY, and JOHN RIDLEY TEMPERLEY, both of The Temperley
Transporter Company, 72, Bishopsgate Street Within, in the City of London,
Engineers, do hereby declare the nature of this invention to be as follows:-
-
Our invention relates to apparatus for raising, lowering and conveying or
transporting loads.
Our said invention is chiefly designed to improve the construction and increase
the efficiency of apparatus of the kind or class described in the Specification of
former Letters Patent dated 21st November 1892, No. 21,170, wherein a traveller
is supported and runs upon an overhead track and is provided with automatic
devices controlled by the lifting rope or chain, whereby, when the load is raised,
the load-sustaining mechanism is locked so that the load cannot be lowered during
the movement of the traveller, and whereby, when the load is to be lowered, the
traveller is securely locked or held in position upon the track and the load-
sustaining mechanism simultaneously unlocked.
One object of our present invention is to so construct apparatus of the kind
described in the said former specification, that a fall-block or multiple-purchase
can be used for the raising and lowering of the load, and consequently the power
required for raising the load will more closely approximate to that necessary
for hauling the traveller along the track, and for performing these operations a
winch or hoisting apparatus can be employed of less power than is required with
a single-purchase traveller.
For this purpose, according to one method, instead of attaching the ball or
block that engages with the forked lever-hook or load-suspender, to the lifting
rope as heretofore, we attach the said ball or block to the frame of a fall-block
or to a rod attached thereto and extending upward therefrom, the lifting rope
being passed over a pulley turning on a pin fixed in the frame of the traveller,
and being then rove through the fall-block and attached at its end to the frame of
the traveller. In this case, the upper pulley, instead of being mounted upon the
pivot-pin of the load-suspender, is mounted upon a separate pin fixed at a suitable
distance therefrom.
According to another method, we provide a different form of load-suspender,
which comprises two hooks suspended from a common pivot-pin held in links
which in turn are suspended from a pin passed through one of the slotted cams,
or through links hereinafter mentioned, the said hooks being adapted to engage
with projections on the frame of the fall-block for the purpose of sustaining the
load when raised. The pivot-pin of the said hooks extends through vertical
slots in the frame of the traveller and in another frame which is suspended from
a pin fixed in the frame of the traveller, and which is formed with open-ended
slots at its lower part into which the projections on the frame of the fall-block will

page_text: enter when the load is raised. Pins fixed in this suspended frame extend into
curved slots in the said hooks, so that, when the hooks are raised relatively to such
frame, they will be moved towards each other and caused to engage with the
projections on the frame of the fall-block; or both hooks may be arranged to
approach and pass under the said projections from the same side thereof. These
load-suspending hooks will, by means of the slotted cams, be locked in this position
until the said slotted cams are released in the manner described in the said former
specification. We are enabled, by the means above mentioned, to dispense with
the devices heretofore employed for adjusting the parts to suit different inclina-
tions of the track, the aforesaid ball or block, when the load is raised, being in
approximately the same position relatively to the load-suspender in our improved
apparatus whatever may be the inclination of the track.
In cases where the track has a fixed or unvarying inclination, we simplify the
construction of the apparatus by rigidly securing the said guide-frame, or other
suitable guides for the fall-block, to the frame of the traveller.
Another object of our present invention is to provide a system of levers and links
which will fulfil the same function as, and will work as effectively or more
effectively and with less wear than the slotted cams, which, in the apparatus
described in the said former specification, are employed, in combination with
the load-sustaining mechanism and with shoulders or stops on the track, for
locking the load-sustaining mechanism when the load is raised, so that the lifting
rope can be used for hauling the traveller along the track, and for releasing the
said mechanism when the load is to be lowered.
Our system of levers and links is adapted for use in combination with notches
or stops on the track such as are described in the said former specification, and is
capable of being used with either of the forms of load-suspender above men-
tioned, and either with a fall-block or double-purchase traveller or with a single-
purchase traveller as may be desired.
We provide a lever which turns upon a pin fixed in the frame of the traveller,
and which is provided with a horn and pawl like those on one of the aforesaid
slotted cams, adapted to engage with stops on the track as described in the said
former specification. This lever is preferably connected by a link with another
lever which turns about a pivot-pin fixed in the frame of the traveller, and which
together with the said link forms a toggle-joint. This toggle-joint is connected
with a second toggle-joint comprising a link coupled to the first toggle-joint by
the middle joint-pin thereof, and a lever which turns about a pin also fixed in the
frame of the traveller. From the middle joint-pin of this second toggle-joint are
suspended, by means of a link or links, the aforesaid load-suspending hooks.
rope.
When the horned lever is turned by its pawl into engagement with one or other
of the notches or stops on the track, it straightens the first toggle-joint, which in
turn straightens the second toggle-joint, thus lowering the load-suspending hooks
and releasing the load so that the latter can be lowered by paying out the lifting
When a load is raised, the projections on the frame of the fall-block enter
the aforesaid guide-frame or guides, and the load-suspending hooks are then raised
by the lifting rope through the medium of the fall-block. The upward movement
thereof causes the flexure of the aforesaid second toggle-joint, which in turn
flexes the first toggle-joint and thus turns the horned lever about its pivot so as to
disengage it from the notch or stop on the track.
The parts are preferably so constructed and arranged that, when the horned lever
is in engagement with the track, the weight of the load-suspending hooks and of
the links directly connected thereto will cause a slight flexion of the first toggle-
joint in the opposite direction to that in which it is bent when the load is raised;
and, when the load is raised and the horned lever disengaged from the track, the
pin coupling the said lever to the upper member or link of the first toggle-joint
will be moved downward so that its centre is a short distance below a straight
lire extending from the centre of the middle joint-pin of the said toggle-joint

page_text: to the centre of the pivot-pin of the horned lever, a suitable stop being provided
for retaining the parts in this position. Accidental displacement of the parts by
jarring or concussion will thus be prevented, and, in the turning of the horned
lever into engagement with the track, there will be but slight resistance to its
movement due to the weight of the load.
We also adapt our system of levers and links for single-purchase travellers.
For this purpose we sometimes dispense with the aforesaid suspension links, and
we make the lever which forms one member of the second toggle-joint with a
downwardly extending arm formed with a gab to engage with a pin or stud on the
load-suspender, the latter, in this case, being mounted on the same pivot as the
pulley, as described in the said former specification.
We made the ball or block that engages with the load-suspender,
with a double eye at the lower end of its hollow stem, 80 that,
when the lifting rope has been rove through the said ball or block, the eye and
thimble will readily enter the space between the two sides of the said double, eye,
and the bolt for connecting the shackle or hook to the lifting rope can then be
passed through the said double eye and thimble. By this means we greatly
facilitate the operation of attaching the said ball or block to the lifting rope.
We can also use the said horned lever in combination with other devices to
serve the purpose of the slotted cams described in the said former specification.
Instead of rigidly securing the guide for the fall-block to the frame of the
traveller, we sometimes attach it thereto by means of hinge-joints so as to permit
lateral oscillation or swinging of the said guide, and thus facilitate the entrance
of the fall-block into the same, and prevent straining of the traveller by lateral
swinging of the load. In such cases we connect the load-suspending hooks to the
links for sustaining them, by means of universal joints which are coupled together
by means of suitable rods or links so as to permit the swinging of the said hooks
along with the swinging guide without interfering with their action.
We find it advantageous to employ a bell-mouthed guide for the fall-block,
having parts of the sides thereof curved outward and upward so as to permit of the
fall-block passing freely into and out of the said guide.
31
T
1000
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.
Improvements in Apparatus for Raising, Lowering, and Conveying or
Transporting Loads.
We, JOSEPH TEMPERLEY, and JOHN RIDLEY TEMPERLEY, both of The Temperley
Transporter Company, 72, Bishopsgate Street Within, in the City of London,
Engineers, 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:-
Our invention relates to apparatus for raising, lowering and conveying or
transporting loads.
Our said invention is chiefly designed to improve the construction and increase
the efficiency of apparatus of the kind or class described in the Specification of
former Letters Patent dated 21st November 1892, No. 21,170, wherein a traveller
is supported and runs upon an overhead track and is provided with automatic
devices controlled by the lifting rope or chain, whereby, when the load is raised,

page_text: the load-sustaining mechanism is locked so that the load cannot be lowered during
the movement of the traveller along the track, and whereby, when the load is to
be lowered, the traveller is securly locked or held in position upon the track and
the load-sustaining mechanism simultaneously unlocked.
One object of our present invention is to provide a system of levers and links
which will fulfil the same functions as, and will work as effectively or more
effectively and with less friction and wear than the slotted cains, which, in the
apparatus described in the said former specification, are employed in combination
with the load-sustaining mechanism and with notches or stops on the track, for
locking the load-sustaining mechanism when the load is raised so that the lifting
rope can then be used for hauling the traveller along the track, and for releasing
the said mechanism and at the same time locking the traveller to the track when
the load is to be lowered.
Our system of levers and links comprises two locking toggle-joints either of
which will be straightened or pushed a short distance beyond the dead centre
when the other is flexed, and will thus be caused to lock the traveller to the track
or the load-suspender in position to sustain the load, as the case may be, the
straightening of one toggle-joint effecting the locking of the traveller to the track,
and the straightening of the other toggle-joint the locking of the load-suspender
in position to sustain the load. The said system of levers and links is adapted for
use in combination with notches or stops on the track such as are described in the
said former specification, and is capable of being used with the different forms of
load-suspender hereinafter referred to, and either with a single-purchase traveller
such as has heretofore been employed, or with a fall-block or double-purchase
traveller such as is hereinafter described.
In the case of the double-purchase traveller, the load-suspender is coupled to
the locking devices which alternately lock the traveller to the track and the load-
suspender in position to sustain the load.
In some instances we use as a load-suspender a forked or split lever-hook as
described in the said former specification. In other instances we provide a different
form of load-suspender, which comprises two hooks depending from, a common
pivot-pin held in links, which in turn are suspended from a pin passed through
one of the slotted cams, or through links as hereinafter described. The said
load-suspending hooks are so constructed and arranged that, when they are raised
by the load-sustaining projections or blocks on the frame of the fall-block, they
will be caused to engage therewith and will be locked in this position until the
lever or cam that engages with the track is released. These hooks are so arranged
that, in moving into engagement with the load-sustaining ball or block, they will
rise therewith; consequently when the traveller is unlocked from the track, the
load will be sustained by the said hooks in the position to which it has been raised,
and will not require to descend in order to permit the load-sustaining block to be
engaged by the said hooks.
A guide-frame or bell depends from the frame of the traveller and serves to
guide the load-sustaining ball or block into the load-suspender. The said guide-
frame or bell is preferably suspended from the traveller-frame in such a manner
that it can swing freely relatively thereto. We are enabled, by these means, to
obviate the necessity for adjusting the parts to suit different inclinations of the
track, the load-sustaining ball or block, when the load is raised, being in approxi-
mately the same position relatively to the load-suspender whatever may be the
inclination of the track.
Our said invention, moreover, comprises other improvements hereinafter set
forth.
In the accompanying drawings we have shown how our said invention may
be conveniently and advantageously carried into practice.
Figure 1 is a side elevation, partly in vertical section, of one form of our
improved apparatus.

page_text: Figure 2 is a transverse section on the line z, z Figure 1.
Figure 3 is a similar view to Figure 1, the parts being shown in a different
position.
Figure 4 is a sectional side elevation showing a modification of our invention
in which the suspended guide-frame or bell is free to swing longitudinally and
laterally.
Figure 5 is a sectional side elevation, and
Figure 6 an edge view, partly in transverse section, showing a similar arrange-
ment applied to a single-purchase traveller.
Figure 7 is a side elevation, partly in section, illustrating another form or
modification of our improved apparatus, and
Figure 8 is a similar view, the parts being shown in a different position.
Figure 9 shows, in side elevation, another modification of the apparatus
illustrated in Figures 7 and 8.
Figures 10 and 11 are views similar to Figures 1 and 3 respectively, illustrating
a further modification of the apparatus shown in those Figures.
A is the traveller, which runs upon an overhead beam or track B. C is a lever
pivoted at C¹ to the traveller-frame A and having a projection or horn C² to
engage with one or other of a series of notches or stops B¹ on the said track, and
a pawl or toggle-arm C³ adapted to bear against one or other of a series of
shoulders B2 on the track, for the purpose of moving the said horned lever C into
engagement with the corresponding notch or stop B, as in the apparatus described
in the said former specification. DĎ is the lifting-rope.
In the arrangement shown in Figures 1 to 3, the lifting-rope D is passed over
a pulley E turning on a pin fixed in the frame of the traveller, and is then rove
through a fall-block f and attached at its extremity to the traveller-frame A.
The pulley E, instead of being mounted upon the pivot-pin of the load-suspender
as heretofore, is mounted upon a separate pin fixed at a suitable distance therefrom.
The load-suspender e, in this arrangement, consists of two pivoted hooks constructed
and operating as hereinafter described.
The lever C is coupled to the load-suspender e by means of certain levers and
links comprised in a system of which the said lever forms a part, and which,
in the arrangement shown in Figures 12 and 3, consists of the lever C pivoted to
the frame at C¹, a second lever 65 pivoted to the frame at 66, a link a coupling the
ends of these two levers by means of the pins a and b, a third lever b¹ pivoted to
the frame at 62, a second link coupling the levers 6 and 65 by means of the
pins and 4, a third link c suspended from the lever by means of the pin b³,
and a fourth link d attached to the link c and to the suspender e by means of
universal joints d' and e¹. Of this system of levers and links, the parts which
are essential to the inter-action for alternately locking and unlocking the traveller
and the load-suspender, are the levers C and band the link a. Each of theso
levers in turn forms a locking toggle-joint with the link a An abutment or
stop g in the frame A restrains the said toggle-joints alternately, when slightly
flexed in the direction requisite to make the locking more secure. When either
toggle-joint is thus held, the other is necessarily flexed in the opposite direction
to an angle of approximately ninety degrees, and securely held in that position
by the slightly flexed toggle-joint. In one of these rigid positions, shown in
Figure 1, the load-suspender sustains the load; in the other, shown in Figure 3,
the traveller is locked to the track. The lever b¹ and links b, c, d, connect the
suspender e to this interlocking system so that the vertical motion of the suspender
will impart the required movement to the lever be. The lever 6' and link 6 together
form a third toggle-joint so arranged that a considerable upward movement of the
pin is necessary to draw the joint-pin b away from the stop g far enough to
liberate the lever C.
The two hooks e forming the load-suspender are pivoted upon a common pivot-
pin e and are adapted to engage with the projections or blocks f¹ on the frame f

page_text: じゃ
of the fall-block for the purpose of sustaining the load when raised. The pivot-
pins d¹, e¹ extend, respectively, through vertical slots A¹, h in the frame A and
in a bell-mouthed guide-frame h suspended from the said frame by hinge-joints h³.
These hinge-joints together with the universal joints connecting the links c and d
and the hooks e, permit lateral swinging of the said guide-frame h and thus
facilitate the entrance of the fall-block into the said frame and prevent straining
of the traveller by lateral swinging of the load. The guide-frame h is formed with
open-ended slots 4 at its lower part into which the load-sustaining blocks f of
the fall-block will enter when the load is raised. "Pins h³ are, fixed in the guide-
frame and extend through curved slots e² in the hooks e, so that, when the said
hooks are forced upward by the blocks f¹, they will approach each other and engage
with the said blocks; as shown in Figures 1 and 2, and, when they are lowered,
they will move away from each other and be disengaged from the said blocks f¹ as
shown in Figure 3.
:
If desired, both hooks e may be arranged to approach and engage with the
load-sustaining blocks f¹ from the same side thereof, instead of from opposite sides
as shown.
1
For keeping the pawl C³ in its proper position and returning it to this position
when necessary, we sometimes attach to the lever C a bell-crank-lever k, k, the
arm k of which carries a roller 2, which is held by a spring in engagement
with a cam-surface formed on the tail-piece, of the pawl C³, the said spring being
secured at one end to the lever C and at the other end to the arm of the said
bell-crank lever. The said cam-surface is so shaped that,, when the lever C has
been rotated by the engagement of the pawl C3 with the stop B² so as to bring the
horn or projection C2 into engagement with the stop B on the track, the roller k²
will, under the action of the spring 3, move the pawl C3. into the position shown
in Figure 3, and, entering the depression in the said cam-surface, will hold the
said pawl in this position until, on the traveller passing a stop B³ while moving
towards the left, the said pawl is turned into the position shown in Figure 1
ready to engage the stop B2 on the reversal of the direction of motion. The pawl
can rotate sufficiently beyond the above-mentioned limits to allow the same to pass
the stops so long as the motion is in one direction only.
When the load is sustained and the traveller free to travel along the track, the
parts are in the positions shown in Figure 1. The toggle-joint formed by the
lever C and the link a is slightly flexed towards and rests against the stop g, and
that formed by the lever 65 and the link a is thereby rigidly held flexed in the
opposite direction, so that no force applied to its centre joint 64 through the load-
suspender e can disturb the position of the system, the pin 64 being, under these
conditions, a fixed point. Similarly the toggle-joint formed by the lever band
link b is flexed upwards, and since the pins 62 and 64 are both, for the time being,
fixed points, no force applied downwardly to the joint-pin 63 can disturb the
position of any of the parts and the pin 63 is therefore, under these conditions, a
fixed point. The load-suspender e is in its highest position and its hooks are held
inwards under the projections f¹ on the fall-block frame by the pins h³ in the
slots As the suspender e is coupled to the pin 3 by means of the links d, c and
as the pin 63 cannot descend and allow the hooks to be disengaged, the load is
securely sustained.
.
When the traveller is locked to the track and the load is free to be lifted or
lowered, the parts are in the positions shown in Figure 3. The toggle-joint formed
by the lever 65 and link a is slightly flexed towards and rests, against the stop 9,
and that formed by the lever C and link a is thereby rigidly held flexed in the
opposite direction, so that no force tending to turn the lever C, about its pivot can
disturb the position of the system. The pin a¹ is, under these conditions, a fixed
point. As the horn C2 is engaged in the notch B¹ of the track and the pin a¹ is,.
for the time being, a fixed point, no force tending, to move the traveller in either
direction can disturb the position of the system. The traveller is, therefore,

page_text: securely, held in position on the track. The pin 63 is in its lowermost position
and the toggle-joint b, b¹ is straight or approximately so. The suspender e is
also in its lowermost position and withdrawn from beneath the projections f¹
on the fall-block frame by the action of the pins h³ in the slots e, and the load is
therefore free to be lowered.
In the lifting of a load, when the load-sustaining blocks f¹ on the fall-block f
enter the slots h in the guide-frame h, they come against the shoulders e³ of the
hooks e; and, in the continued upward movement of the fall-block, the said
blocks fraise the said hooks, thereby moving upward the middle joint-pin b
of the toggle-joint b, .b', drawing over the pin and allowing the lever C to
disengage itself from the track, and at the same time causing the said hooks e
to be moved beneath the said blocks f¹ by means of the pins h³ extending through
the curved slots e². The lever C, when disengaged from the track, is forced against
the stop-g, thus completing the locking of the load-suspender, so that the traveller
can be moved along the track without lowering the load.
The locking of the traveller to the track and the simultaneous releasing or
unlocking of the load-suspender are effected as follows:-After the traveller has
been hauled up the track to the left past any stop or notch B¹ so that the pawl C³
has been thereby turned to point to the right, the motion of the traveller is reversed
by paying out the lifting rope until the pawl C³ engages with the corresponding
shoulder B² on the track as shown in Figure 1; then, as the traveller continues to
move in the direction of the arrow, the said pawl C³ causes the lever C to turn about
its pivot until the horn C² partly enters the notch B₁ on the track and until the
toggle-joint C, a, has been flexed past the dead centre in a direction away from the
stop. g. The pin 63 now descends by the action of the load, straightening
the toggle-joint b, b¹ and forcing the centre of the toggle-joint a, b against
stop g. In doing so it forcibly completes the turning of the lever C about its
pivot until the horn C² has fully entered the notch B₁ and locked the traveller
securely to the track against motion in either direction. At the same time the
hooks e will descend through a short distance with the fall-block and be moved
apart by the pin h³ in the guide-frame h, so as to release. the fall-block as shown
in Figure 3, and thus permit the lowering of the load.
It will be seen that, by the above-described arrangement of the levers and links,
accidental displacement of the parts by jarring or concussion will be effectually
prevented, and, in the turning of the horned lever into engagement with the track,
there will be but slight resistance to its movement due to the weight of the load.
To adapt the apparatus for different inclinations of the overhead track without
the aid of the devices heretofore employed for adjusting the parts to suit such
different inclinations, we suspend the guide-frame or bell which facilitates the
entrance of the load-sustaining ball or block into the load-suspender, from the
traveller-frame by means of a transverse pivot-pin or pivot-pins fixed in the said
frame or in a short frame hinged thereto, so as to permit longitudinal swinging
of the said guide-frame or bell. Or, instead of this transverse pivot-pin, we can
use for this purpose an universal joint which will permit swinging of the said
guide-frame or bell in any direction. In this case we can dispense with the said
hinged frame.
In Figure 4 the guide-frame or bell p is pivoted at p¹ to a short frame h
connected with the traveller-frame A by hinge-joints 42, and the slots in which
works the pivot-pin el of the load-suspender e are formed in the said guide-frame
or bell p, the pins h³ that extend into the slots 2 being also fixed therein.
Figures 5 and 6 show a single-purchase traveller in which the axle E¹ of the
pulley E over which the lifting-rope D passes, is fixed in the frame h depending
from the traveller-frame A, and the guide-frame or belly and load-suspender e are
pivoted at p to links n coupled to the universal joint eat the lower end of the
links d, the pivot-pins p¹ being coupled by guide-links o to a pin o¹ fixed in the
frame h, 'so that the pin "p with all the parts attached to it will rise and fall with

page_text: the pin e. The pins are, in this case, fixed in links. q pivoted at g² to
frame h.
.
the
When the ball or block f¹ on the lifting-rope D enters the bell 2, it lifts the said
bell and the hooks e; as the pins h³ cannot rise the hooks e are drawn in under
the block f¹ as shown and sustain the load.
The mechanism from e¹ upwards is the same as in the other Figures hereinbefore
referred to and works in the same way. Lateral swinging of the load is permitted
by the hinges h² as before, and longitudinal swinging by the bell p and hooks e
being free to swing about the pivots p¹.
It is evident that, with this arrangement, there is no necessity for altering or
adjusting the parts to suit different inclinations of the track, the load-sustaining
blocks f, when the load is raised, being in the same position relatively to the load-
suspender e whatever may be the inclination of the track.
In cases where the track has a fixed or unvarying inclination, we simplify the
construction of the apparatus by rigidly securing the said guide-frames, or other
suitable guides for the load-sustaining ball or block, to the frame of the traveller.
In Figures 7, 8 and 9 we have shown modifications of our invention wherein
our system of levers and links is applied to a single-purchase traveller.
For this purpose the three essential parts of the system of levers and links,
that is to say, the two levers C and 65 and the link a, are retained in the same
relative positions and perform the same functions as in the case of the double-
purchase traveller shown in Figures 1, 2 and 3.
In the arrangement shown in Figures 7 and 8, the lever 65 is connected by the
link c with a lever d pivoted at de to the frame of the traveller and made with a
downwardly extending arm d³ formed with an open slot or gab d to engage the
pin or stud et on the load-suspender e. The suspender e and the pulley E over
which the lifting rope D passes are both pivoted at e¹ to the lower frame h which
is hinged at h² to the upper frame A so as to allow the load to swing laterally
without strain. The suspender, in this instance, is in the form of a double
pointed or split hook for engaging the ball or block fl on the lifting-rope, and is
provided with a long split arm or race through which the lifting-rope passes, and
to the free end of which is pivoted at e a safety-pawl e engaging the teeth of a
quadrant F fixed to the swinging frame h to guard against accidental lifting of
the suspender by the rope D. The pawl e' is provided with a long double or forked
arm by means of which the ball or block f¹, before raising the suspender,
disengages the said pawl from the quadrant. The upper end of the quadrant F
carries a leather pad F to act as a stop for the upper arm of the suspender e.
A check plate jis pivoted to the arm d³ and is coupled by a link j¹ to the frame A,
so that, when the load is being lifted or lowered, the said check-plate j is prevented
by the pin from falling and therefore acts as an extra security to the locking
arrangement in the event of any violent shock to the traveller, and forms a path
for the re-entrance of the pin et into the gab d
The load-sustaining ball or block f¹ is made with a double eye f' at the lower
end of its hollow stem so that, when the lifting-rope has been rove through the
said ball or block, the thimble which is spliced into the lower end of the rope will
readily enter the space between the two sides of the said double eye, and the bolt
for connecting the shackle or hook to the lifting-rope can then be passed through
the double eye and thimble. By this means we greatly facilitate the operation of
attaching the said ball or block to the lifting-rope.
When the load is sustained and the traveller free to travel along the track,
the parts are in the positions shown in Figure 7, and the lever 65 is rigidly held
in the position shown, by the toggle-joint C, a. The suspender is held in its
highest position by the pin e4 in the gab d of the lever d, d³, and the ball or
block on the lifting-rope being in the hook of the suspender e, the load is
securely sustained.
When the traveller is locked to the track and the load is free to be lifted or

page_text: lowered, the parts are in the positions shown in Figure 8, and the lever C is
rigidly held engaged in the stop on the track by the toggle-joint b³, a, and the
traveller thus securely locked against motion in either direction. The pin e' is
then out of the gab d and the suspender e is in its lowermost position resting on
the stop F and prevented from rising by the pawl e, and the ball or block fon
the lifting-rope. being no longer held by the hook, the load is free to be lowered.
In the arrangement shown in Figure 9, the lever 65 is formed with an arm №3
having a gab d to engage with the pin of the load-suspender. When the load-
suspender is raised by the ball or block f, the pin e turns the lever 65 about its
pivot and the system of levers and links acts as in the case of the double-purchase
traveller herein before described, thereby locking the suspender and sustaining the
load, leaving the traveller free to be moved in either direction on the track.
The locking of the traveller to the track and freeing of the load are effected
in the same manner as that above described for the double-purchase traveller; the
pine of the suspender, in escaping from the gab in the lever 65, rotates the latter
forcibly until it rests against the stop y, thus completing the locking of the
traveller to the track.
By employing a system of levers and links in the manner above set forth, instead.
of slotted cams as heretofore, for coupling the load-suspender to the device for
fastening the traveller to the track, we not only simplify and improve the construc-
tion of the apparatus but greatly diminish the friction and wear of the moving
parts.
In Figures 10 and 11 we have shown a modification of our invention in which
the load-suspender e, instead of being connected through the system of levers and
links above described with the horned lever or cam C for locking the traveller to
the track, is coupled by means of links d, c to a slotted lever or cam G which is
connected by a sliding pin I to the slotted lever or cam C that locks the traveller
to the track.
Each of the slots C, G¹ in the levers or cams C, G consists of a spiral portion
and a radial portion, and are connected by a pin I arranged to slide backwards
and forwards in slots A' in the side plates of the traveller-frame A, as described
in the said former specification.
When the lever C turns about its pivot to engage the stop on the track, the pin I
is forced to the right by the action of the spiral slot C and enters the spiral slot G¹
in the lever G; the lever G then falls with the load on the suspender, and its
spiral slot G¹ drags the pin I further to the right and into the radial part of the
stot C in the lever C, which lever is thereby locked to the track as shown
Figure 11. When, on lifting a load, the suspender e raises the lever G, the
reverse action takes place and the parts return to the position shown in Figure 10.
All the other parts corresponding with those shown in Figures 1 and 3 remain as
therein shown and operate as herein before described.
It is evident that we can somewhat further modify the construction of our
improved apparatus without departing from the nature of our said invention.
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: :-
First. An apparatus of the kind or class hereinbefore referred to, in which
a horned lever or cam is coupled by means of one or more links or levers and
links to the load-suspender or to a slotted lever adapted to engage therewith,
substantially as herein before described and for the purposes specified.
Second. In an apparatus of the kind or class herein before referred to, a double
locking toggle-joint so constructed and arranged that, when either joint is flexed,
the other will be straightened or pushed a short distance beyond its dead centre
and thus caused to lock the traveller to the track or the load-suspender in position
to sustain the load as the case may be.

page_text: Third. The combination of a horned lever pivoted to the traveller and adapted
to fasten the same to the overhead track, another lever also pivoted to the traveller,
and a link coupling the said levers so as to form a double locking toggle-joint, for
the purposes above specified.
Fourth. The employment of a third toggle-joint coupled to one of the joint-
pins of the double locking toggle-joint, substantially as, and for the purposes,
hereinbefore described.
Fifth. An apparatus of the kind or class herein before referred to, wherein the
load-suspender is coupled to locking devices adapted to be operated through the
medium of the lifting-rope and to alternately lock the traveller to the track and
the load-suspender in position to sustain the load, for the purposes above specified.
Sixth. An apparatus of the kind or class hereinbefore referred to, wherein a
load-suspender coupled to or connected with a horned lever or cam pivoted to the
traveller, is adapted to engage with lateral projections on a fall-block, for the
purposes above specified.
Seventh. An apparatus of the kind or class herein before referred to, wherein a
guide-frame or bell for facilitating the entrance of the load-sustaining ball or
block into the load-suspender, is free to swing longitudinally or laterally or both
longitudinally and laterally, for the purposes above specified.
Eighth. The combination, with the traveller-frame, of a lower frame connected
therewith so that it is free to swing laterally with the load, and a guide-frame or
bell suspended from the said lower frame so that it is free to swing longitudinally,
substantially as, and for the purposes, herein before described.
Ninth. The modification of our invention wherein the guide-frame or bell
for facilitating the entrance of the load-sustaining ball or block into the load-
suspender, is movable up and down with the said load-suspender relatively to the
traveller-frame, substantially as hereinbefore described.
Tenth. In an apparatus of the kind or class hereinbefore referred to, load-
suspending hooks which, in moving into engagement with the load-sustaining ball
or block, rise therewith so that, when the traveller is unlocked from the track,
the load will be sustained in the position to which it has been raised.
Eleventh. An apparatus of the kind or class hereinbefore referred to, in which
load-suspending hooks are coupled by links to devices for alternately locking the
traveller to the track and the said hooks in position to sustain the load, and are
adapted to be moved into and out of engagement with a load-sustaining ball or
block and to rise with the same while moving into engagement therewith, for the
purposes above specified.
Twelfth. An apparatus of the kind or class herein before referred to, wherein
load-suspending hooks are coupled, through the medium of links, to locking
toggle-joints or to slotted levers or cams connected by a sliding pin, and are
adapted, as they rise and fall, to be moved into and out of engagement with a
load-sustaining ball or block, substantially as, and for the purposes, hereinbefore
described.
Thirteenth. The employment of a load-sustaining ball or block having a hollow
stem and a double eye at the lower end of the said stem, as, and for the purpose,
above specified.
Fourteenth. The improved apparatus constructed substantially as described
with reference to either of the forms or modifications illustrated in the accompany-
ing drawings and operating as, and for the purposes, above specified.
1201
1
1 1000
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.