Improvements in and relating to Apparatus for Dumping, Depositing, or Releasing Loads Suspended from Cranes, Transporters, and other Hoisting-machines.
Year: 1897

page_text: Date of Application, 31st Dec., 1897
Complete Specification Left, 29th Sept., 1898-Accepted, 10th Dec.,
1898
TRUVIDIONAL DINOLT
Improvements in and relating to Apparatus for Dumping, Depositing,
or Releasing Loads Suspended from Cranes, Transporters, and
other Hoisting-machines.
We, JOHN RIDLEY TEMPERLEY and JOSEPH 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 dumping, depositing or releasing loads
lifted by cranes, transporters and other kinds of hoisting-machines.
The chief object of our invention is to provide improved means whereby the
operator of a crane, transporter or other hoisting-machine can effect the empty-
ing of a bucket or grab or the releasing of a load suspended therefrom, when the
same is at any desired height from the ground or other surface upon which the
load is to be deposited, by means of the rope used for raising and lowering
the load.
According to our said invention we combine with a sheave, over which the
lifting rope or chain passes in a fall-block or grab, suitable means for connecting
the said sheave with the bucket or load or with a latch or other device for sus-
taining the load, in such a manner that the bucket or grab can be emptied or the
load released by the revolution of the said sheave, whilst the load is suspended
by the lifting rope or chain, and irrespective of its height above the ground or
other surface on which it is to be deposited, and without the aid of the usual
supplementary operating rope or chain or of any device which operates when but
not until the load has been lowered to a predetermined position.
For this purpose, according to one method, we connect the bucket or load, or
a latch or other contrivance for sustaining the load, with the said sheave or with
a pawl-carrier or other device combined therewith, by means of a cord or chain,
so that, when the parts are properly set or adjusted, a pull can be exerted upon
the said cord or chain by simply hauling in (or paying out as the case may be)
the lifting rope, so as to cause rotation of the said sheave about its axis through
a suitable angle.
In one arrangement of this kind, the connecting mechanism is so arranged
that it remains inoperative whilst the lifting rope or chain is being hauled in
and paid out in the first instance, but becomes operative immediately on com-
mencing to haul in the said rope or chain a second time.
For instance we employ a pawl and ratchet and means for rendering the same
inoperative and subsequently operative. We sometimes arrange the normal posi-
tion of the said pawl inclined in the direction of motion of the ratchet-wheel
when hauling in the rope, so that the teeth of the same depress and pass the
pawi, but, on paying out the rope, the reverse motion of the ratchet-wheel will
turn the pawl over so as to incline it in the opposite direction and adapt it to
engage with the teeth of the ratchet-wheel when lifting the second time. Or
the normal inclination of the pawl may remain always in the direction to engage
with the ratchet-wheel when hauling in the rope, in which case the pawl will

page_text: not affect the operation of the apparatus. For example we suspend the bucket
from the fall-block by means of two links coupled to the fall-block by separate
pivot-pins, and between these links we arrange a guide-pulley the groove of
which on one side is in such a position that it will be intersected by a straight
line extending through the axes of the said pivot-pins.
When our improved apparatus is to be used for opening the grab or bucket
of a fluid-pressure excavator, we sometimes connect the rope or chain attached
to the pawl-carrier or its equivalent or to the sheave, with a valve for the
admission of fluid under pressure to. or its exhaust from, a cylinder or cylinders
for the purpose of opening or permitting the opening of the grab or bucket. By
these means the opening of the said grab or bucket can be effected at any desired..
height from the ground by simply hauling in the lifting rope or chain of the
hoisting-apparatus a second time.
In applying our apparatus to an excavator with a mechanically operated
bucket or grab, we employ one or other of the arrangements above mentioned in
combination with a sheave mounted in the frame of the excavator, and couple
the connecting chain or cord to a pin or catch or other device which retains the
bucket or grab closed, so that, by rotating the said sheave, the bucket or grab can
be opened or allowed to open.
Dated thin 914
T
1007.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.
Improvements in and relating to Apparatus for Dumping, Depositing,
or Releasing Loads Suspended from Cranes, Transporters, and
other Hoisting-machines.
We, JOHN RIDLEY TEMPERLEY and JOSEPH 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 improved apparatus for dumping, depositing or releas-
ing loads lifted by cranes, transporters and other kinds of hoisting machines.
The chief object of our said invention is to provide improved means whereby the
emptying of a bucket or grab or the releasing of a load suspended from a crane,
transporter or other hoisting machine can be effected through the medium of the
rope or chain used for raising and lowering the load.
Heretofore, in some forms of apparatus used for this purpose, it has been neces-
sary to employ a supplementary or auxiliary operating rope or chain for releasing
or dumping the load. In other forms of such apparatus a device is employed
which will operate to release or dump the load when it has been lowered to a
predetermined position; but in such cases the load cannot be released or dumped
either above or below such predetermined position.
Now by our invention, without employing an auxiliary rope or chain, we pro-
vide for the releasing or dumping of the load at any height whatever from the
ground or other surface upon which it is to be deposited, as may be desired by
the operator of the apparatus, who is not limited to any fixed or predetermined
position for effecting the releasing or dumping of the load, but can bring about

page_text: Figures 20 and 21 are side elevations, and
Figure 22 a sectional side elevation, illustrating further modifications of our
said invention.
Figure 23 is a side elevation, partly in vertical section, and
Figure 24 is a front elevation, partly in section on the line 3, ³, Figure 23,
showing another arrangement for releasing the bucket.
...
Figures 25 and 26 are sectional elevations, illustrating the application of our
invention to different forms of dumping grabs.
In Figures 1 to 8, we have shown our improvements applied to a traveller A
adapted to be moved along an overhead track B by means of the lifting-
rope 1), substantially as described in the Specification of former Letters Patent
granted to us and dated 17th June 1897, No. 14720, a bucket F being suspended
from the fall-block f of the said traveller by means of a bridle or bail F¹.
A pawl-carrier G is adapted to slide to and fro in a guide-way or race f² in
the frame f of the fall-block beneath the sheave H. This pawl-carrier is con-
nected at one end, by means of a cord or chain G¹ passing over guide-pulleys F³,
to a latch suitably arranged in the bail F of the bucket F, so that, when the
chain G is pulled upwards, the said latch will be disengaged from the bucket F
as hereinafter described.
A pawl or pair of pawls K is mounted on a pivot-pin K in the carrier G.
These pawls are adapted to engage with cocking shoulders H2 and operating
shoulders Hat opposite ends of recesses H¹ in the sheave H, which recesses are
deeper at the end H than at the other end H3 as shown.
In the rotation of the sheave H, while the fall-block f and bucket F are being
raised with the load into the position shown in Figures and 2, the pawls K
When, however,
are merely depressed by the shoulders H³ of the said sheave.
the load is lowered and the sheave H rotates in the direction indicated by the
arrow in Figure 1, the shoulder-H2 which first strikes the pawls K will cock the
same or turn them so that they point to the right therefore, when the fall-
block is again raised and the sheave H rotated in the direction indicated by
the arrow in Figure 3, the shoulder H3 which first comes in contact with the
pawls will engage therewith as shown in Figure 3, and move the carrier G
towards the left along the guide-way or race f into the position indicated by
dotted lines in Figure 3. In this manner the cord or chain G will be hauled
in so as to disengage the latch and permit the dumping of the load by the tilting
of the bucket about its trunnions F3.
It will be seen that the load-releasing or tipping mechanism is so arranged
that it remains inoperative whilst the lifting rope or chain D is being hauled
in and paid out in the first instance, but becomes operative immediately on
commencing to haul in the said rope or chain a second time.
We find it advantageous to connect the fall-block f with the bail F¹ of the
bucket in such a manner that the releasing cord or chain G₁ extends centrally
through the suspension device and consequently the swinging of the said bucket
will not affect the operation of the apparatus. For this purpose, in the arrange-
ment shown in Figures 1 and 2, we suspend the bail F from the fall-block f
by means of two links or a double link coupled to the fall-block frame by
separate pivot-pins F, and we arrange between these links one of the guide-
pulleys so that the groove thereof on one side is in a vertical plane extending
through the axes of the said pivot-pins F7.
In order that the pawl K shall, when free, always return to and remain in the
inoperative position, as shown in Figure 7, until cocked or turned over to the
right by one or other of the shoulders H2, its pivot pin K₁ is provided with a
pinion K geared with a rack L on a rod or bar L', which is adapted to slide
longitudinally within the carrier G on a flanged guide-roller G2 and guides G³,
and is held in a predetermined position by a stopped spring L2, which also
This spiral spring L² is
causes it to return to that position when free to do so.
placed upon the bar L' between washers L³ mounted loosely thereon but having

page_text: by means of a link M2, to a shifting lever M pivoted at M to the said frame. When
the outer end of the lever M is raised, as shown in Figure 10, the movable
part f of the guide-way is lowered and the pawl K thus withdrawn from the
sheave H. When, in the lifting of the load, the lever M is depressed relatively
to the fall-block frame into the position shown in Figure 9, by the guide-frame
or bell p on the traveller A, or by a weight hung from the jib of a crane, the
movable piece is raised to the position shown in this figure, so that the
pawls K can be acted upon by the shoulders H2, H3 on the sheave H, and is
locked in this position by the toggle-joint formed by the short arm of the lever M
and the link M2, further downward motion of the said lever being prevented by a
stop When the lever M and the movable part få are again brought to the
position shown in Figure 10, the shoulder fe is thus moved into a position relative
to the direction of the pull of the cord G which leaves the carrier G free to
slip off the said shoulder and return to the position shown in Figure 10 ready
for further operation.
The latch J shown in Figure 9 is pivoted at Js to an arm m pivoted at m' to
the bail F¹. The motion of the bucket F about its truunions F3 is limited in one
direction by means of a stop F, whilst the tipping of the said bucket by gravity
is controlled by the latch J, which rises about its pivot J8 to permit the edge of
the bucket to pass under it, and which is connected to the releasing chain or
cord G so that it can be thereby turned about its pivot to disengage it from the
bucket and permit the dumping of the load.
In Figures 11 and 12, we have shown a modification of the pawl-carrier in
which the bar L' is adapted to be locked in position, when the pawls are cocked,
by means of a spring detent or latch Lo which is pivoted at L8 to the frame of
the pawl-carrier G as shown, and which engages with a shoulder L5 on the bar L'.
In the movement of the pawl-carrier to the left, this latch L6 is disengaged
from the said shoulder by an inclined projection on the frame f, thus releasing
the rack L and allowing the pawls K fo return to their normal position.
In the arrangement shown in Figures 13 to 16, the pawls K are mounted on a
pivot-pin Kin the end of a lever N pivoted at N¹ to a lever P which turns about
a pin P fixed in the fall-block frame f. The lever P is coupled, by means of a
link M, to a lever M pivoted at M to the frame f of the fall-block, the motion
of the lever M being limited by the pin M³ which connects the lever M and
link M², and which works in slots f in the fall-block frame f. On the pin N
is also pivoted a bell-crank-lever Q, to the arm Q¹ of which the releasing cord
or chain G is attached. The said arm Q¹ bears against the fixed pin Plas
shown in Figures 13 and 14, and another arm Q2 of the said bell-crank-lever Q
bears against the lever N and serves as a stop for the latter. For the purpose
of holding the pawls K in their free or normal position and returning them to
that position when required, we also mount on the pin N¹ a third lever R which
is pressed by its spring R¹ against a cam K³ fixed on the pivot-pin K' of the said
pawls, and is adapted to enter a notch or depression in the said cam as shown
in Figure 14. The said spring R' is connected at one end to the lever R and
at its other end to the curved part Q3 of the bell-crank-lever Q, and therefore
serves also to hold the lever N against the arm or stop Q³.
The releasing mechanism is shown in Figure 14 out of action, the lever M
having been moved by hand so as to turn the lever P about its pivot P¹ and
thus move the pawls K away from the sheave H. When the fall-block f with the
bucket attached is lifted until the said block enters the guide-frame or bell of
the traveller, the action of the load-suspending hooks e forces the lever M and P
into the positions indicated in Figure 13, thus bringing the pawls K within reach
of the shoulders H³, H3 of the sheave H. The said lever P then remains in that
position because the toggle-joint formed by the lever M and link M is on, or
past, the dead centre, and therefore resists the upward pressure on the right
hand end of the lever P due to the weight of the bell-crank-lever Q and its
adjuncts.

page_text: extends through a slot Y2 in the sheave Y into a curved race or cam-groove f
in the fall-block frame f. When this stop-pin is at either extremity of the said
cam-groove f, the pawl K is out of reach of the shoulders H, H³ on the
sheave H. To bring the said pawl into the path of these shoulders when the
parts are in the position shown in Figure 18, the sheave Y requires to be turned
through a small angle in the direction indicated by the arrow, so as to bring the
pin Q3 into the circumferential part of the said cam-groove. This is effected,
in the lifting of the load, by a lever M pivoted at M to the fall-block frame f
and having a pin M projecting from it through a slot fi in the said frame and
adapted to press against a cam Y3 on the sheave Y, the weight W, or any other
suitable device provided for the purpose, turning the lever M from the position
shown in Figure 18 to that shown in Figure 19. The curved upper face of the
cam 1 is so shaped that it will retain the lever M in the position shown in
Figure 19, as is done by the toggle-joints in the arrangements. herein before
described. In the lowering of the load, the cocking of the pawl K will be
effected by the sheave H, and then, by again hauling in the lifting rope 1), the
sheave Y can be turned through the medium of the sheave H and pawl K in
the direction indicated by the arrow, so as, to wind the chain. G¹ more or less
upon the said sheave Y and thus effect the tipping of the bucket, or if desired
the disengagement of the bucket-latch. On raising the lever M by hand, the
weight of the bucket will move the sheave Y back to its original position and
throw the pawl K out of action.
By this form of construction we can provide for the hauling in of a consider-
able length of the cord or chain G', so as, if desired, to bodily tip. the bucket
or tray as indicated by dotted lines in Figure 18.
We sometimes pass the cord or chain Gover the auxiliary sheave Y and attach
both ends to the bucket or tray as shown in Figure 20, so that, as one end of
the said cord or chain is hauled in, the other is paid out, and the bucket or,tray
is thus tilted or tipped so as to dump, the load.
We do not confine ourselves to the application of our invention to a hoisting
machine provided with a multiple purchase lifting tackle. It is evident that.
when the load is raised directly by the lifting-rope D, an idle rope Di, Figure 21,
passing over a sheave H in a fall-block f suspended from the lifting rope D,
and kept taut by a counterweight W2 can be made to effect the same purpose.
We can also, in some cases, dispense with the use of a sheave for actuating
the releasing or tipping mechanism. For instance, in Figure, 22, we have shown
an arrangement in which the, reversible pawl K is actuated by a weight W
having cocking and operating shoulders H2, H3 and capable of sliding vertically
through a sufficient space upon a bar D2 attached to the lifting-rope or chain D
so as to answer, the same purpose as the sheave above described. The weight W3
is suspended from a chain 13 which passes over pulleys on the crane-jib or the
like and is provided with a counterweight that just balances the weight of W
The pawl-carrier N is mounted on a lever P pivoted at P to a frame P2, which
is restrained from vertical motion relatively to the lifting-rope D and rod D².
In the position shown, the load, has been lowered and the pawl cocked. On
again raising the load, the pawl-carrier N rises relatively to the weight W3 and,
the pawl Kengaging the shoulder H³, the releasing or tipping mechanism is
operated as in the other cases above described.
Figure 25 shows the application of our invention to a grab that is lifted,
lowered and operated by a single rope or chain D. The grab shown, with the
exception of the unlocking device, is similar to that known as "Hone's Patent
Grab" and need not be described further than to state that, when the grab is
closed, the opening of the same is prevented by means of the pin y carried by
the sliding block engaging in a notch in the side of the stem of the sliding
crosshead which is connected by the rods or links with the pivoted, jaws
of the grab; and the pin yl is also notched so that, when it is rotated through
an angle of say 60 degrees, the cross-heady is free to fall. We mount our pawl-

page_text: releasing or tipping mechanism is so constructed that it will be thrown out of
gear automatically or can be put out of gear by hand after the dumping or release
of a load, and will be automatically thrown into gear when the load is lifted or
transported to a predetermined position, substantially as herein before described
and for the purposes specified.
8. A sliding, reciprocating or oscillating carrier provided with a reversible
pawl or pawls and suitably connected to the releasing or tipping cord or chain,
Substantially as herein before described and for the purposes specified.
9. The combination, with a fall-block, having a sheave provided with cocking
and operating shoulders, of a sliding, reciprocating or oscillating carrier provided
with a reversible pawl or pawls, substantially as, and for the purposes, above
specified.
10. The combination, with a lifting or hoisting tackle, of load-releasing or
tipping mechanism suspended from the lifting rope or chain, and an operating
device therefor also suspended from the said rope or chain, substantially as, and
for the purposes, herein before described.
11. The herein described method of connecting the bucket with the fall-block
so that the releasing or tipping rope or chain extends centrally through the sus-
pension device, for the purposes above specified.
12. The combination, with the load-releasing or tipping-mechanism, of a latch-
ing device comprising two vertically movable blocks one of which carries the
latch and the other of which is connected with the reciprocating or oscillating
pawl-carrier, and which are coupled together in such a manner that they can be
readily disconnected by hand and will be automatically connected when the
releasing mechanism is thrown into gear, substantially as, and for the purposes,
above specified.
13. The combination, with the sliding, reciprocating or oscillating pawl-
carrier, of suitable means for holding the pawl or pawls in or returning them to
their inoperative position, and for automatically locking them in the cocked
position and unlocking them when the dumping or releasing of the load has been
effected, substantially as, and for the purposes, herein before described.
14. The guide-way or race for the sliding or reciprocating pawl-carrier, made
with a fixed part and with a movable part which is adapted to be raised and
lowered relatively thereto, substantially as, and for the purposes, above specified.
15. The rocking lever carrying the load-releasing or tipping mechanism and
coupled to a lever for turning it about its pivot to throw the said mechanism into
and out of gear, substantially as, and for the purposes, above specified.
16. The combination of the reciprocating or oscillating pawl-carrier, the bell-
crank-lever connected to the releasing or tipping cord or chain, and the spring
lever for holding the pawl in and returning it to its inoperative position, sub-
stantially as, and for the purposes, above specified.
17. The combination, with the load-releasing or tipping mechanism, of a latch-
ing lever pivoted to the bail of the bucket and adapted to be raised to move the
latch out of engagement with the bucket by a hook depending from the releasing
cord or chain, substantially as, and for the purposes, above specified.
18. The lever for throwing the releasing or tipping mechanism into and out of
gear, adapted to be actuated automatically by the guide-frame or bell or by the
load-suspending hook or hooks, or by other suitable means, substantially as, and
for the purposes, above specified.
19. The combination, with a fall-block, of an idle or auxiliary sheave to which
the releasing or tipping cord or chain is attached and which is adapted to be
actuated by the sheave of the said fall-block through the medium of a reversible
pawl or pawls, substantially as, and for the purposes, above specified.
20. The combination, with the idle or auxiliary sheave, of the oscillating pawl-
carrier and the bell-crank-lever pivoted thereto, the said bell-crank-lever being
provided with a pin or stud extending into a fixed cam-groove having inwardly-
curved ends, and means for turning the said sheave either automatically or by