Improvements in and applicable to Derricks and Cranes.
Year: 1896

page_text: Date of Application, 15th Jan., 1896
Complete Specification Left, 14th Oct., 1896-Accepted, 28th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in and applicable to Derricks and Cranes.
I WILLIAM MILLER WALTERS of 7 and 9 Portland Street, Liverpool in the
County of Lancaster Manufacturer, do hereby declare the nature of this invention
to be as follows:-
The main objects are to provide means whereby the jibs of derricks and cranes
whether pivotted to a stationary upright or turning therewith may be readily
moved from side to side so as to lift and desposit the load from and at the desired
place.
The invention consists essentially in combining with the jib a rope or like
flexible agent led from a motor at the foot of the jib up each side of the jib
around pulleys or blocks at each side thereof and thence to stanchions eyebolts
or other securing devices at either side of the said jib. The rope or ropes or like
flexible agent or agents pass around a drum or wheel on the motor or are otherwise
connected thereto so that as the rope or flexible agent is taken in on on one side of
the jib it is payed out on the other.
Dated the 14th day of January 1896.
J. JOHNSON,
Agent.
Improvements in and applicable to Derricks and Cranes.
I WILLIAM MILLER WALTERS of 7 and 9 Portland Street Liverpool in the
County of Lancaster, Manufacturer, 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 main objects are to provide means whereby the jibs of derricks and cranes
whether pivotted to a stationary upright or turning therewith may be readily
moved from side to side so that the load may be lifted and deposited from and at
the desired place.
The invention consists essentially in combining with the jib a rope or like
flexible agent led from a motor at the foot of the jib, up each side of the jib
around pulleys or blocks at each side thereof and thence to stanchions, eyebolts, or
other securing devices at either side of the said jib. The rope or ropes or like
flexible agent or agents pass around a drum or wheel on the motor or are other-
wise connected thereto so that as the rope or flexible agent is taken in ou one side
of the jib it is paid out on the other.
The accompanying drawing is a view showing apparatus constructed according
to my invention. a is a jib pivotted at 6 in the usual manner to a mast or
stationary upright c. The jib may be attached to a revolving upright if desired.
d, are ropes passing around a drum e on the motor f, placed at or near the foot of
the jib. The ropes d pass from the motor up each side of the jib to and around
pulleys or blocks g at each side of the jib and thence to stanchions or other
securing devices h placed at any suitable points on each side of the jib. The

page_text: ropes d are wound on the drum e in different directions so that as one rope is paid
out, the other is drawn in. i is the usual hoisting chain or rope. The motor f
may be operated by hand, steam, or other desired power. By the above means,
by revolving the drum e the jib and the load suspended therefrom can be swung
laterally as desired. The top of the jib is supported in any usual manner by the
upright e.
In cases where it is necessary or advantageons to lower the top of the jib so as
to give a varying radius, as for instance, on board ship when the angle of jib
suitable for lifting from the hatch does not give sufficient radius to carry the load
outside the ship's bulwarks, I make use of a rope j passing round pulleys or
blocks k, on the upright c and jib a for supporting such jib and I wind one end of
such rope j around the drum e so that as the drum e revolves to swing the jih to
one side, the ropej is paid out so as to lower the top of the jib to such an extent
as may be desired; when the drum revolves to swing the jib back to the centre,
the ropej is drawn in and the top of the jib is raised. If the jib is to be swung
to the other side of the ship, the rope j is wound on the drum in the reverse
direction.
When the appliance for raising and lowering the jib is being used, it is necessary
for efficient operation that the stanchions should be placed on a straight line
passing through the pivot b of the jib.
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 :-
Apparatus for giving lateral motion to jibs of derricks and cranes substantially
as set forth.
Dated than 12th d of Datahon 1906
W. B. JOHNSON.