Year: 1887

page_text: Date of Application, 19th Feb., 1887
Complete Left, 18th Nov., 1887
Complete Accepted, 20th Dec., 1887
I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the County
of Mid Lothian, North Britain, Engineer, do hereby declare the nature of this
Invention to be as follows, that is to say :-
My said Invention comprises improvements on and modifications of apparatus
described in the Specification of my patent No. 16939 of 1884.
In the said Specification there are described certain arrangements for effecting the
sluing of the crane jib and the raising or lowering of its outer end by one action. By
my present Invention I propose to effect the sluing operation in an improved manner,
or so as to be more conveniently managed in some circumstances.
In carrying out my Invention I pass a rope or chain attached to the outer end of
the jib to a block or pulley attached to a yard arm which may be a sail yard of the
ship or a specially provided yard. From the block or pulley on the yard arm I lead
the rope or chain to tackle pulleys arranged to be actuated by means of an hydraulic
cylinder fixed on the ship's mast. According to one modification one hydraulic
cylinder is arranged to effect both the sluing operation and the raising and lowering
operation, as is done but in a different manner according to my earlier Specification
hereinbefore referred to. In some cases however when circumstances and special
requirements render it desirable I employ a separate hydraulic cylinder fixed on the
mast for effecting the sluing operation.
The precise arrangements of the tackle pulleys in connection with the hydraulic
cylinder will vary in different cases accordingly as the mast is or is not raked or
inclined and in cases in which the mast is raked, accordingly as the crane jib is at the
fore or aft side of the mast. In cases in which a yard arm is not available the rope
or chain may pass from the tackle pulleys of the hydraulic cylinder fixed on the mast
to a block.or pulley on the jib and thence to a ring bolt or other fastening at the side
of the ship, the block or pulley on the jib being attached thereto at a point some
distance from the end when it is required to slue the jib with its end well over the side
of the ship.
1000
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in or Connected with Hydraulic Cranes for Ships.
I, ANDREW BETTS BROWN, of Rosebank Iron Works, Edinburgh, in the County
of Mid Lothian, North Britain, 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 that is to say :-
:-
My said Invention comprises improvements on and modifications of apparatus
described in the Specification of my patent No. 16939 of 1884.
In the said Specification there are described certain arrangements for effecting the
sluing of the crane jib and the "topping" or raising or lowering of its outer end by
one action. By my present Invention I effect the sluing operation in an improved
manner, or so as to be more conveniently managed in some circumstances.
And in order that my said Invention and the manner of performing the same,
may be properly understood I hereunto append two sheets of explanatory drawings
to be hereinafter referred to and showing my improved apparatus.
Figures, 1, and 2, on sheet, 1, of the drawings are a plan and a side elevation
showing one arrangement; and figures, 3, and 4, on sheet, 2, are a plan and a side
elevation showing other arrangements. In these drawings the same reference
numerals are used to mark the same or like parts wherever they are repeated.
In carrying out my Invention according to the modification shown in
figures, 1, and 2, I connect the jib. 10, by a rope or chain, 11, indicated by
peculiarly dotted lines, to a yard arm, 12, which may be a sail yard of the ship,
or a specially provided yard. The end of the rope or chain, 11, may be attached
either to the jib, 10, or to the yard arm, 12, and in either case it is led round a
pulley, 13, on the other part. In the figures, this pulley, 13, is shown as attached
to the jib, 10, being mounted so that it can swivel. From the pulley, 13, the
rope or chain, 11, is led over a swivelling pulley, 14, to a combination of tackle
pulleys, 15, arranged to be actuated by means of an hydraulic cylinder, 16, fixed on
the ship's mast, 17. This hydraulic cylinder, 16, is arranged to effect both the sluing
operation and the topping or raising and lowering operation, as is done, but in a
different manner according to my earlier Specification hereinbefore referred to. For
this purpose the hydraulic cylinder, 16, in addition to the piston rod issuing through
a stuffing box at its upper end to work the combination of tackle pulleys, 15, by
means of which the sluing operation is effected, has an extension of its piston rod
issuing through a stuffing box at its lower end to work a combination of tackle
pulleys, 18, by means of which and a rope or chain, 19, the topping operation is
effected. In some cases, however, when circumstances and special requirements
render it desirable, I employ the hydraulic cylinder, 16, fixed on the mast, 17, for
effecting the sluing operation only.
The precise arrangements of the tackle pulleys, 15, 18, in connection with the
hydraulic cylinder, 16, will vary in different cases, accordingly as the mast, 17, is

page_text: or is not raked or inclined; and in cases in which the mast is raked, accordingly as
the crane jib, 10, is at the fore or aft side of the mast.
In cases in which a yard arm (12) is not available the arrangements shown in
figures, 3, and 4, may be adopted. These figures show arrangements for both fore
and aft sides of a raking mast as applied to the same mast, 17, but in many cases,
only one or other of the arrangements will be required in connection with one mast.
The rope or chain, 11, for sluing passes from the tackle pulleys, 15, of the hydraulic
cylinder, 16, fixed on the mast, 17, round a swivelling pulley, 14, to a swivelling
pulley, 13, on the jib, 10, and thence to a ring bolt or other fastening at the side of
the ship, the pulley, 13, on the jib being attached thereto at a point some distance
from the end when it is required to slue the jib with its end well over the side of the
ship. In consequence of the rake or inclination of the mast, 17, the jib, 10, tends
to slue by gravitation, inboard when arranged at the after side, as shown at the left-
hand side of figures, 3, and 4, and outboard when at the fore side as shown at the
right-hand side of those figures; and the ends of the sluing ropes or chains, 11, must
be fixed accordingly so as when drawn by the action of the hydraulic cylinder, 16,
to slue the jib, 10, outwards if at the after sido of the mast and inwards if at the fore
side. And in the latter case the piston rod of the hydraulic cylinder, 16, must be
connected to the tackle pulleys, 15, so as to impart a reversed motion. For this
purpose the piston rod end has attached to it a pair of chains, 20, which pass round
guide pulleys, 21, and thence proceed in a reversed direction to the tackle pulleys, 15.
When the cylinder, 16, is not used also for topping the reversing action of the
chains, 20, and pulleys, 21, will not be required.
In cases in which the strains to which the chain or rope, 11, is subjected renders it
desirable, such chain or rope may be passed round two or more pulleys so as to increase
the number of its folds.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is :-
1-In, or in connection with hydraulic cranes for ships, providing in each case, an
hydraulic cylinder fixed on the mast with tackle pulleys and accessory gear for sluing
the crane jib, the same cylinder being also used for topping or not, substantially as
herein before described.
2-Arranging the hydraulic cylinder referred to in the first claim to operate only
on the sluing gear substantially as hereinbefore described.
Dated this Seventeenth day of November 1887.
EDMUND HUNT,
Per pro David Ferguson,
Applicant's Agent.