Improvements in Electrical, Steam, or other Power or Hand Cranes, or other Apparatus for Raising and Lowering.
Year: 1890

page_text: Date of Application, 20th Mar., 1890
Complete Specification Left, 22nd Dec., 1890-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Electrical, Steam, or other Power or Hand Cranes,
or other Apparatus for Raising and Lowering.
I, REGINALD BOLTON, of the firm of R. Bolton & Co., of 110, Leadenhall
Street, in the City of London, Engineer, do hereby declare the nature of this
invention to be as follows:-
The improvement relates to :
The use of two winding drums or barrels, each independent of the other, though
they may be driven from the same gearing, and their use in connection with a single
chain or rope, one barrel being attached to each end and wound on in same direction
and the bight passed over two idle wheels, and through a hoisting pulley or fall to
which is attached the lifting hook.
Arrangements whereby the barrels may be of different diameters and may also be
separately reversible by suitable gearing adapted to be readily operable by the
attendant.
The arrangement of driving gear (preferably worm gear) by which the two
motions are taken from a single continuously running shaft operated by a motor or
hand power, the reversing being by clutch gear, and lowering by brake.
The two independent drums or barrels are mounted preferably on one shaft and
operated by a central worm wheel with clutches of suitable form to enable cach to
be independently connected to the driving gear and they may be connected by
levers so as to wind at once, in which case the two ends of the lifting rope will be
wound in at full speed; or, by stopping one barrel with the brake, the other barrel
will continue to lift at half-speed, or again by lowering out one barrel while the
other continues to lift, any desired speed of lift may be attained, by the difference
attained.
It will be apparent that by making one barrel smaller than the other a further
differential hoisting speed is obtained, and by winding on the small barrel and
lowering out the large one a very slow speed of lowering or hoisting may
attained.
be
In my arrangement for steam, electrical or other power cranes, travellers and the
like apparatus I prefer to use a central driving gear by worm gearing operated by
a cross shaft, and to connect the two barrels thereto by suitable friction or other
clutch apparatus and I control their lowering by frictional brake, but the lowering
may be attained by reversing the one barrel and holding the other by a ratchet
pawl or catch.
Again I may produce the same result by arranging the two barrels on separate
shafts at different heights from the worm or driving shaft, and making two halved
worm wheels of different diameters engaging in the driving worm, (or by two
different diameter spur wheels engaging in the same pinion). Thus the two barrels
may be driven at different speeds in the same direction.
By these means I am enabled to attain :
The use of two independent barrels on a crane, of the same or different diameters
with a single rope. Also, two barrels on a crane operating the same rope and
lowering or hoisting independently of each other.
And by the arrangement of two barrels as above operated to raise and lower by
a single continuously running driving shaft in one direction in a manner particularly
adaptable to electrical applications.
Dat the 20th dow of Mob 1890
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Electrical, Steam, or other Power or Hand Cranes,
or other Apparatus for Raising and Lowering.
I, REGINALD BOLTON, of the firm of R. Bolton & Co., of 110, Leadenhall
Street, in the City of London, 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 -
The improvements relate to :
The use of two winding drums or barrels each independent of the other, though
they may be driven from the same gearing, and their use in connection with a single
chain or rope, one barrel being attached to each end and wound on in same direction
and the bight passed over two idle wheels, and through a hoisting pulley or fall to
which is attached the lifting hook.
Arrangements whereby the barrels may be of different diameters and may also
be separately reversible by suitable gearing adapted to be readily operable by the
attendant.
The arrangement of driving gear (preferably worm gear) by which the two
motions are taken from a single continuously running shaft operated by a motor or
hand power, the reversing being by clutch gear, and lowering by brake.
Two independent drums or barrels are mounted preferably on one shaft and
operated by a central worm wheel with clutches of suitable form to enable each to
be independently connected to the driving gear and they may be connected by
levers so as to wind at once, in which case the two ends of the lifting rope will be
wound in at full speed; or, by stopping one barrel with the brake, the other barrel
will continue to lift at half-speed, or again by lowering out one barrel while the
other continues to lift, any desired speed of lift may be attained, by the difference
attained.
It will be apparent that by making one barrel smaller than the other a further
differential hoisting speed is obtained, and by winding on the small barrel and
lowering out the large one a very slow speed of lowering or hoisting may be
attained.
In my arrangement for steam, electrical or other power cranes, travellers and the
like apparatus I prefer to use a central driving gear by worm gearing operated by
a cross shaft, and to connect the two barrels thereto by suitable friction or other
clutch apparatus and I control their lowering by frictional brake, but the lowering
may be attained by reversing the one barrel and holding the other by a ratchet
pawl or catch.
Again I may produce the same result by arranging the two barrels on separate
shafts at different heights from the worm or driving shaft and making two halved
worm wheels of different diameters engaging in the driving worm, (or by two
different diameter spur wheels engaging in the same pinion). Thus the two barrels
may be driven at different speeds in the same direction.
By these means I am enabled to attain :
The use of two independent barrels on a crane, of the same or different diameters
with a single rope. Also, two barrels on a crane operating the same rope and
lowering or hoisting independently of each other.
And by the arrangement of two barrels as above operated to raise and lower by
a single continuously running driving shaft in one direction in a manner particularly
adaptable to electrical applications.
In the application of my winding gear to (say) cranes especially when designed
for ship's winches or hoisting engines, I prefer to arrange the parts as shown on
Figs. I and II.
Upon a shaft A carried in two bearings B. B' is keyed the worm wheel C. which
is provided on either side with a ring D D' internally bored tapered and thereby

page_text: forming a frictional connection to the externally turned cones E, E², which form
part of the winding barrels F and G.
These barrels are shewn of unequal diameters but this difference of diameter is
not essential as the differential speed of winding may be attained by difference of
speed of rotation by simple modification of the driving gear. A worm upon the
shaft H which is rotated by any suitable electrical or other motor, runs in an oil-
box 1, and is provided with lubricant by means of the side-lid j.
The power is thus transmitted by the worm shaft H, through the worm and
wheel C to the shaft A. and the warping barrels J J.
The barrels and G are however loose on the shaft A and only receive notion
when they are pressed sideways towards wheel C whereby the internal cones are
brought into gripping contact.
This is accomplished by a groove K K turned in the boss of the barrels F and G
in which a jawed lever L L', engages and which is set over by worm segment and
worm M, M and hand wheels N N'.
0,0 are fixed brake rings turned to a coned surface similarly to the driving
cones D, D, and the corresponding ends of the winding barrels F and Gare
provided with external axes to fit same.
Thus by throwing either barrel to the right hand or left hand it may be engaged
with the driving gear, or braked, or in the middle position is free to revolve.
The arrangement of ropes according to my improvement is clearly shewn in Fig. 3.
The barrels and G have each an end of the rope R wound upon them this rope
passes over a double pulley block s. and through a single sheave T provided with a
hook to engage the load to be hoisted, but this arrangement for carrying the rope
to its work may be varied. Fig. 4 is a front view of the arrangement of parts
previously described in the use of which a differential speed of winding by means of
two equally sized barrels is obtained. In this case the shafts a, a' each carried in
separate bearings bb, are provided with divided or part worm wheels of unequal
diameter engaging in the worm described. The barrels fand gare of equal diameter
but are operated in substantially the same manner as previously described.
Fig. 5 is another arrangement especially adapted for hand power appliances. In
this case the shaft 1 is driven by spur gear whee! 2 and pinion 3 upon a handle
shaft 4. The small barrel 5 being rigidly connected to the spur wheel but the
larger barrel 6 being operated by a friction clutch 7 as previously described formed
by external and internal cones or other well known metliods of frictional connection.
Upon the outer end of the said barrel 6 is a ratchet wheel rigidly connected
thereto and engaging same in usual manner is a pawl 8.
By this means attain a rotation of both barrels and thereby a winding in of the
rope or of the small barrel only the large barrel being either held fast by the pawl
or allowed to revolve checked as need be by the brake or pawl and paying out that
end of the rope. Thus to lower the load the handles are moved round in a reverse
direction. thus attain the benefits of frictional lifting gear with the security
characterising direct gearing. Instead of the brake ring an equivalent device may
be formed upon the ring 7 whereby this load may be lowered out under brake in the
usual method.
I am aware that independent unequal barrels have been used before for attaining
different speeds with separate ropes, but I am not aware of any such use with the
two ends of the saine rope.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I claim
is :-
In electrical, steam or other power or hand, cranes, or other apparatus for
raising or lowering,
1. The arrangement or combination and use of two independently rotating barrels,
on a shaft or divided shafts of the same diameter or different diameters operating
one and the same rope or equivalent flexible connection, substantially as set forth.

page_text: 2. The combination or arrangement and use of two independently rotating barrels
operating the same rope for the purpose of obtaining a differential motion or variable
speed of lift and lowering substantially as set forth.
3. The combination or arrangement and use of two independently rotating barrels
of the same or unequal diameters frictionally connected to the friction cones of a
central spur or worm-wheel operable by a motor, and alternatively to fixed friction
cones forming a brake the lowering being attained by the release of the friction
cones in the intermediate positions so that two ends of one and the same rope may
be wound on the said barrels substantially as shewn and described.
4. The combination or arrangement and use of two independently rotating barrels
on separate and independent shafts operated by independently operating worm or
gear wheels substantially as described.
5. The combination and arrangement of two independently rotating winding
barrels one barrel driven by directly connected gearing and the other barrel
frictionally connected to the driving gear and provided with a safety ratchet
substantially as and for the purpose described.
Dated the 20th day of December 1890.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.