IMPROVEMENTS IN MACHINERY OR APPARATUS APPLICABLE TO CRANES, HOISTS, AND OTHER LIKE APPARATUS FOR OBTAINING INTERMITTENT AUXILIARY MOTION FOR DREDGING, TIPPING, FILLING, AND DISCHARGING BUCKETS, OR OTHER SIMILAR PURPOSES."
Year: 1881

page_text: LETTERS PATENT to William Clarke, of Victoria Works, Gateshead-on-Tyne,
Engineer, for an Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS
APPLICABLE TO CRANES, HOISTS, AND OTHER LIKE APPARATUS FOR OBTAINING
INTERMITTENT AUXILIARY MOTION FOR DREDGING, TIPPING, FILLING, AND
DISCHARGING BUCKETS, OR OTHER SIMILAR PURPOSES."
PROVISIONAL SPECIFICATION left by the said William Clarke at the
Office of the Commissioners of Patents on the 29th November 1881.
WILLIAM CLARKE, of Victoria Works, Gateshead on Tyne, Engineer. "IMPROVE-
MENTS IN MACHINERY OR APPARATUS APPLICABLE TO CRANES, HOISTS, AND
OTHER LIKE APPARATUS FOR OBTAINING INTERMITTENT AUXILIARY MOTION FOR
DREDGING, TIPPING, FILLING, AND DISCHARGING BUCKETS, OR OTHER SIMILAR
PURPOSES."
My Invention relating to improvements in machinery or apparatus for obtaining
intermittent auxiliary motion has more particular reference to cranes, winches, and
hoists, which frequently require a combined definite intermittent action to be
derived and converted from a continual source of motion, as is more especially
exemplified in cases of dredging, tipping, and filling and discharging buckets.
For this purpose I provide in such machines a second cylinder or barrel below
or in convenient relation to the usual primary barrel common to such appliances
for winding up or letting out the chain or ropes used for raising or lowering the
load.
The second cylinder or barrel is mounted loose on a shaft which is connected by
spur or other suitable gearing with the shaft carrying the ordinary primary barrel,
so that during the operation of the machine both shafts are caused to continuously
revolve at any desired relative velocity, although the former mentioned loose
mounted barrel would be unaffected thereby.
In order to bring this second barrel into intermittent operation at definite

page_text: L
intervals as may be required, I arrange on its shaft, preferably between it and the
spur gearing, a suitable number of toothed driving discs or clutches. The first
driving disc or clutch is fixed to the shaft, and consequently always revolves with
it, while the intermediate ones are mounted loose thereon. It will now be under-
stood that as the secondary shaft continually revolves at a certain ratio velocity to
that of the primary shaft, so the tooth or projection of the fixed driving disc or
clutch will engage in due course with a similar projection on a loose one and carry
it round with it, which on completing one revolution will in its turn similarly
engage with a third, and so on, until finally the last driving disc or clutch engages
with a projection on the barrel, and thus causes it to revolve with the shaft and
drivers, whereby the required intermittent actuation is obtained and communicated
to the desired portion of the machine or its appendages.
The motion of the second barrel will under the present described conditions
continue so long as the primary barrel continues its motion in the same direction,
but immediately the motion of the latter is reversed the driving discs or clutches
are thrown out of gear, when the former is again rendered inoperative.
It will be understood that the number of driving discs or clutches used must be
varied to suit the required intervals of intermittent action, or according to the
relative number of revolutions the primary barrel is desired to perform before
bringing into operation the intermittent actuating gear.
The top or primary barrel for lifting the load or for performing other similar
functions may be driven from an engine or other convenient motor in the usual
manner.
It will be obvious that the means and apparatus above described for obtaining
a simple intermittent auxiliary motion from a continuous source of motion may be
applied to various other machines requiring such arrangements, and the motion
thus derived may be modified and converted as desired in accordance with
requirements.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Clarke in the Great Seal Patent Office on the 25th May
1882.'
WILLIAM CLARKE, of Victoria Works, Gateshead-on-Tyne, Engineer. " IMPROVE-
MENTS IN MACHINERY OR APPARATUS APPLICABLE TO CRANES, HOISTS, AND
OTHER LIKE APPARATUS FOR OBTAINING INTERMITTENT AUXILIARY MOTION FOR
DREDGING, TIPPING, FILLING, AND DISCHARGING BUCKETS, OR OTHER SIMILAR
PURPOSES."
My Invention relating to improvements in machinery or apparatus for obtaining
intermittent auxiliary motion has more particular reference to cranes, winches, and
hoists, which frequently require a combined definite intermittent action to be
derived and converted from a source of continuous motion, as is more especially
exemplified in cases of dredging, tipping, and filling and discharging buckets.
The accompanying Drawing represents a machine to which my Invention is
applied. According to my said Invention I provide in such machines a second
cylinder or barrel G below or in other convenient position relatively with the
primary barrel A keyed to the shaft B commonly used in such appliances for
winding up or letting out the chains or ropes used for raising or lowering the load.
The second cylinder or barrel G is mounted loosely on a shaft E, which is con-
nected by a spur wheel D gearing with a spur wheel C on the shaft B, or by other
suitable gearing with the shaft carrying the ordinary primary barrel A, so that
during the operation of the machine both shafts B and E are caused to continuously
revolve at any desired relative velocity, although the former mentioned loose
mounted barrel would be unaffected thereby.
In order to bring this said second barrel G into intermittent operation at definite
intervals as may be required, I arrange on its shaft E, preferably between the said
barrel G and the spur gearing, as shewn, a suitable number of driving discs or
clutches F, F, F, provided with teeth f, as shewn, in the face view of one of the
said discs or clutches in the separate Figure. The first disc F has a tooth on one
side only, the others F1, F", have teeth on each side and opposite each other.
The first driving disc or clutch F is fixed to the shaft E, and consequently always
revolves with it, while the other driving discs or clutches F¹, F", are mounted
loosely on the said shaft E. It will now be understood that as the secondary
shaft G continuously revolves at a certain ratio of velocity to that of the primary
shaft B, the tooth or projection f of the fixed driving disc or clutch F will
eventually come against the similar projection f on the loose disc or clutch F¹ and
carry it round with it, and on completing one revolution the projection f on the
other side of this disc or clutch F¹ will in its turn similarly engage with the tooth f
of the third disc or clutch F, and that finally the tooth f on the other side of the
driving disc or clutch F" will come against the projection g on the barrel G, and
thus cause it to revolve with the shaft E and drivers F, F, F", whereby the
required intermittent actuation is obtained, which may be communicated to the
desired portion of the machine or its appendages from the barrel G.
The motion of the barrel G will under the present described conditions continue
so long as the primary barrel A continues its motion in the same direction, but
immediately the motion of the latter is reversed the driving discs or clutches
F, F, F, are thrown out of gear, when the barrel G is again rendered
inoperative.
It will be understood that I do not limit myself to the number of driving discs
or clutches shown, as one or a number of such driving discs or clutches must be
employed, varied in accordance with the required duration of the intervals between

page_text: the intermittent action, or according to the relative number of revolutions the
primary barrel A is desired to perform before bringing the barrel G into operation.
The top or primary barrel A for lifting the load, or for performing other
operations may be driven from an engine or other convenient motor in the usual
manner.
It will be obvious that the means and apparatus above described for obtaining
a simple intermittent auxiliary motion from a source of continuous motion may be
applied to various other machines requiring such arrangements, and the motion thus
derived may be modified and converted as desired in accordance with the require-
ments of the work to be performed by the machine.
Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider to be novel and original,
and therefore claim as the Invention secured to me by the herein before in part
recited Letters Patent is,-
The improvements applicable to cranes, hoists, and other like apparatus for
obtaining intermittent auxilliary motion from continuous motion, the said improve-
ments consisting in the combination with the primary or ordinary barrel or the
like of a second barrel or the like to which motion is communicated by a driving
disc or clutch, or driving discs or clutches, substantially as herein before described
and illustrated in the accompanying Drawings.
In witness whereof, I, the said William Clarke, have to this my Specification
set my hand and seal, this Twenty fifth day of May, One thousand eight
hundred and eighty two.
WILLIAM CLARKE. (L.S.)