Improvements in Derrick Cranes.
Year: 1894

page_text: Date of Application, 11th June, 1894
. Complete Specification Left, 9th Mar., 1895-Accepted, 13th Apr., 1895
:
Improvements in Derrick Cranes.
I, FRANCIS GOULD, MORONY STONEY, of Waterside Works, Ipswich, in the
County of Suffolk, Engineer, do hereby declare the nature of this invention to be
as follows,, that is to say:-
My said invention has for its object an improved construction of derrick crane,
suitable for being placed on a wheeled truck or otherwise. on land or for being
placed on a floating vessel or poutoon, and, comprising arrangements for .swinging
completely round and for balancing the weights of the apparatus and of the loads
lifted.
In carrying out my invention I have the crane details and motor apparatus
carried on a structure which rests by .annular or segmental bottom plates upon an
annular series of free rollers which roll upon an annular roller path. On the
carrying structure as made according to one modification, there are formed at
diametrically opposite points two tanks provided with pipe connections with each
other and with a centrifugal or other pump. The derrick jib, or it may be shear
legs or other, parts, are placed above one tank at the side which the jib or hoisting
gear overhangs, and the motor apparatus and some other parts are placed on the
opposite, side of the centre together with a permanent weight such as to hold the
parts.in balance when the crane is without a load and when the tank under
the crane is full of water, the tank at the weight side being empty.
crane takes a load a quantity of water is transferred by gravitation or by pumping
from one tank to the other, its effect in counterbalancing the load being twice what
corresponds to the weight transferred as it is taken from one side and added at the
other side. The transferring action may be controlled by a hand lever, or. by
automatic mechanism. Instead of employing water in tanks, a weight or weights
on a truck on wheels or otherwise made easily movable along a path crossing the
centre of, the structure may be employed.
11th day of June 1804
When the
EDMUND HUNT,
Applicant's Agent.
1
COMPLETE. SPECIFICATION.
Improvements in Derrick Cranes.
1,-Francis Gould - Morony STONEY, of Waterside Works, Ipswich, in the
County of Suffolk, Engineer; do hereby declare the nature, of this invention and
in what manner the same is to be performed, to be particularly described and
Pascertained in and by the following, statement, that is to say:-
My said invention has for its object an improved construction of derrick-crane,
suitable for being placed on a wheeled truck or otherwise on land, or for being
placed on
on a floating vessel or pontoon; and comprising arrangements for swinging
completely round and for balancing the weights of the apparatus and of the loads
lifted.
In carrying out my, invention the crane details.and motor apparatus are,mounted
on a structure rotating on rollers, and containing two or other number of tanks,

page_text: provided with pipe connections with each other and with a centrifugal or other
pump. One of the said tanks is placed at the side which the jib or hoisting gear
overhangs, and a second tank may be placed diametrically opposite to the first,
together with a permanent weight such as to hold the parts in balance when the
crane is without a load and when the tank under the crane is full of water, the tank
at the weight side being empty. When the crane is loaded, a quantity of water is
transferred from one tank to the other to preserve the balance.
Instead of employing water in tanks, a weight or weights on a truck on wheels
or otherwise made easily movable along a path crossing the centre of the structure,
may be employed.
Where necessary or desirable, a third water tank may be employed, which may
normally rest upon the revolving platform but to counterbalance heavier loads may
be carried upon a separate derrick, so as to be capable of being extended to a
radius outside the pontoon; and in special cases this tank may be wholly or
partially floated in the water, more or less in the manner described in my Patent
Specification No. 19166 of 1893.
And in order that my said invention and the manner of performing the same may
be properly understood, I append a sheet of explanatory drawings, to be hereinafter
referred to, and representing by way of example one application of my
improvements in derrick cranes.
Figure, 1, is a sectional elevation of my apparatus as placed on a floating vessel
or pontoon; and Figure, 2, is a plan showing the arrangement of the tanks..
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
As shown in Figure, 1, of the drawings a crane, A, is carried on a structure, B,
which is circular in plan, and which rests by an annular bottom plate or girder, C,
upon a series of free rollers, D, which roll upon a roller path formed upon an
annular plate or girder, E, fixed within the pontoon, F. The rollers, D, are upon
the ends of radial rods, fixed to a centre piece, G, fitted to turn on a pivot, H. On
the carrying structure, B, there are formed in diametrically opposite positions two
tanke, J, K, which are provided with pipe connections, L, M, and with a centrifugal
pump, N, (or it might be any other suitable kind of pump). The pair of shear
legs, P, with which in the example shown other parts, Q, are combined, or it might
be an ordinary crane or derrick jib, is placed above one tank, J, at the side which
the hoisting gear overhangs, and the motor apparatus comprising steam boiler, R,
engine, S, and winding gearing are placed on the other side of the centre, and if
required an additional permanent weight also, so as to hold the parts in
balance when the crane or hoisting apparatus is without a load and when the tank, J,
under the crane is full of water, the tank, K, at the weight side being empty.
When the crane takes a load a quantity of water is transferred by gravitation or
by pumping from one tank to the other, its effect in counterbalancing the load
being twice what corresponds to the weight transferred as it is taken from one side
and added to the other side. The transferring action may be controlled by means
of a hand lever or by automatic mechanism. For slewing or turning round the
apparatus the fixed annular girder, E, has spur teeth formed round its outer side,
and a pinion, T, gearing with these teeth is upon the lower end of a vertical shaft
carried by the upper movable structure, B, and arranged so that it can be driven
when required, from the gearing worked by the steam engine, S.
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 :-
1. In derrick-cranes, carrying the crane or other hoisting details and the motor
apparatus on a structure which rests and can rotate upon an annular series of free
rollers, combined with the balancing of weights of the apparatus and load, by means
of tanks for containing water, which is transferable by pumping or by gravitation
from one tank to the other, substantially as hereinbefore described.
!!

page_text: 2. Carrying and arranging the combination of parts forming the subject matter
of the first claim upon a floating vessel or pontoon substantially as hereinbefore
described.
Dated this Eighth dox of March 1805
EDMUND HUNT,
Applicant's Agent.