Improvements in and connected with Steam Derricks or Hoisting Apparatus.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in and connected with Steam Derricks or Hoisting
Apparatus.
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 relates in part to derricks of the kind described in McKinlay's
Patent Specification No. 16+16 of 1892, and has partly for its object to combine
therewith improved steam winding machinery, and partly to modify or improve
parts of the derrick arrangements. The improved steam winding machinery may
also be advantageously combined with hoisting apparatus of various kinds.
A considerable portion of the improved "winding machinery is enclosed in a
casing consisting of a bed frame with bearing and other supporting parts, and
provided with a cover. A crank shaft driven by two horizontal steam cylinders
fixed to one side of the casing, has loose on it a worm which gears with a worm-
wheel on an upper horizontal shalt on which is keyed a winding barrel. The upper
shaft has loose on it a second wormwheel and a second winding barrel, these
two being fixed together. The second worm wheel is driven by a worm on a
shaft parallel to the crank shaft and driven therefrom by a pair of spurwheels.
The loose worn and the spurwheel, which latter also loose on the crank shaft,
are provided with a double frictional clutch which can be set by means of a hand
lever so as to engage either of them (but not both) with the crank shaft; and
they are made with brake rims to which brake straps are applied the straps being
acted on by springs which prevent rotation except when relieved by means of
the hand lever. For reversing the motion of the crank shaft, the steam-cylinder
distribution valves are combined with a controlling valve which is adjustable by
means of a hand lever, this arrangement being similar to what is in use in some
steering engines.
The upper shaft is extended beyond its bearings which are outside of the two
winding barrels, and ordinary overhanging winch barrels are fixed on its ends.
Within the casing there is placed at a convenient height a reservoir to contain
lubricating oil which finds its way from the reservoir by gravitation to the various
parts requiring lubrication, and which is continually being pumped up again by a
small pump worked off one of the valve eccentrics or other convenient part.
With the machinery hereinbefore described either of the two winding barrels,
can be driven in either direction, and one of them is arranged to act on the hoisting
rope of the derrick jib, or boom, the other being arranged to act on the rope by
means of which the derrick is slewed so as to move its outer end outboard or
inboard of the ship.
The improvement in the derrick apparatus is to admit of the jib or boom being
slewed to either side of the ship without having to alter any fixings or adjustments.
For slewing the jib I attach to the outer end of it two pulley blocks; and through
one of them pass a rope the end of which is secured to a suitable fixed point at one
side of the deck, a similar rope being also passed through the other pulley

page_text: block and having its end secured to a suitable fixed point at the other side of
the deck. From the pulley blocks at the end of the jib the ropes pass up to
pulleys on the mast and thence down, and if required round guide pulleys, to
winding apparatus arranged so as when winding or drawing one rope to let out the
other.
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LM 1905
EDMUND HUNT,
Applicant's Agent.
COMITIE SI PALETATION.
Improvements in and connected with Steam Derricks or Hoisting
Apparatus.
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 relates in part to derricks of the kind described in McKinlay's
Patent Specification, No. 16416 of 1892, and has partly for its object to combine
therewith improved steam winding machinery, and partly to modify or improve
parts of the derrick arrangements. The improved steam winding machinery may
also be advantageously combined with hoisting apparatus of various kinds.
A considerable portion of the improved winding machinery is enclosed in a casing.
A crank shaft driven by two horizontal steam cylinders has loose on it a worm
which gears with a wormwheel on an upper horizontal shaft on which is keyed a
winding barrel. The upper shaft has loose on it a second worm wheel and a second
winding barrel, these two being fixed together. The second worm wheel is driven
by a worm on a shaft parallel to the crank shaft, and driven therefrom by a pair
of spurwheels. The loose worm and the spurwheel, which latter is also loose
on the crank shaft, are provided with a double coil or other clutch which can
be set by means of a hand lever so as to engage either of them (but not both)
with the crank shaft; and they are made with brake rins to which brake straps
are applied, the straps being acted on by springs which prevent rotation except
when relieved by means of the hand lever. For reversing the motion of the crank
shaft, the steam-cylinder distribution valves are combined with a controlling valve
which is adjustable by means of a hand lever.
The invention also comprises certain improvements in the derrick apparatus
which are hereinafter described.
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 apparatus as made with some of my
improvements.
Figure, 1, ou Sheet, 1, of the drawings is a side elevation of my improved
apparatus. Figure, 2, is a vertical section of the same.
Figure, 3, on Sheet, 2, is a vertical section of the apparatus as at right angles to
Figure, 2.
Figure, 4, is a horizontal section of the apparatus.
In these drawings the same reference letters and numerals are used to mark the
same or like parts wherever they are repeated.
A considerable portion of the improved winding machinery is enclosed in a
casing, A, consisting of a bed frame with bearing and other supporting parts, and

page_text: provided with a cover, A 1. A crank shaft, B, driven by two horizontal steam
cylinders, B 1, and B2, fixed to one side of the casing, has loose on it a worm, C,
which gears with a wormwheel, D, on an upper horizontal shaft, D 1, on which is
keyed a winding barrel, E. The upper shaft, D1, has loose on it a second
wormwheel, G, and a second winding barrel, G 1, these two being fixed together.
The second wormwheel, G, is driven by a worm, H, on a shaft, H 1, parallel to the
crank shaft, B, and driven therefrom by a pair of spurwheels, J, and J 1. The
loose worm, C, and the spurwheel, J, which latter is also loose on the crank shaft, B,
are provided with a double coil or other clutch, K, which can be set by means of a
hand lever, K 1, so as to engage either of them (but not both) with the crank shaft;
and they are made with brake rims to which brake straps, L, and, M, are applied
the straps being acted on by springs, L 1, and M 1, which prevent rotation except
when relieved by means of the hand lever, K 1. The hand lever, K 1, is connected
by a rod, K2, a link, K 3, a shaft, K4, and an arm, K 5, to the clutch, K; and the
shaft, K4, is also connected by arms, Ĺ 2, and M 2, and links, L 3, and M 3, to the
springs, L1, and M 1. For reversing the motion of the crank shaft, B, the steam-
cylinder distribution valves, are combined with a controlling valve in the valve
box, N, and which is adjustable by means of a hand lever, N 1, and intermediate
parts, this arrangement being similar to what is in use in some steering engines.
The controlling valve is kept shut, except when actuated by the hand lever, N 1,
by a spring, N 2, arranged on the valve spindle, N 3.
The upper shaft, D 1, extended beyond its bearings, D 2, which are outside of
the two winding barrels, E, and G 1, and ordinary overhanging winch barrels, D 3,
and D4, are fixed on its ends.
Within the casing, A, there is placed at a convenient height a reservoir, P, to
contain lubricating oil which finds its way from the reservoir by gravitation to the
various parts requiring lubrication, and which is continually being pumped up
again by a small pump, P 1, worked off one of the valve eccentrics, P 2, or it might
be any other convenient part.
With the machinery hereinbefore described either of the two winding
barrels, E, G 1, can be driven in either direction, and one of them is arranged to
act on the hoisting rope of the derrick jib, or boom, the other being arranged to
act on the rope by means of which the derrick is slewed so as to move its outer end
outboard or inboard of the ship.
The improvement in the derrick apparatus is to admit of the jib or boom being
slewed to either side of the ship without having to alter any fixings or adjustments.
For slewing the jib attach to the outer end of it two pulley blocks; and
through one of them pass a rope the end of which is secured to a suitable fixed
point at one side of the deck, a similar rope being passed through the other
pulley block and having its end secured to a suitable fixed point at the other
side of the deck. From the pulley blocks at the end of the jib the ropes pass
up to pulleys on the mast and thence down, and if required, round guide pulleys,
to winding apparatus arranged so as when winding or drawing one rope to let out
the other.
If it is desired to work the winding apparatus hereinbefore described with an
ordinary derrick, the worm, H, the shaft, H1, the spurwheels, J, and J 1, and the
clutch, K, with its accessory parts can be dispensed with.
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. The improved combination of parts constituting the winding or hoisting
mechanism substantially as herein before described.
2. The enclosing of the driving mechanism of winding or hoisting machinery in
a casing in combination with apparatus therein for repeatedly rasing the lubricant
substantially as hereinbefore described.

page_text: 3. The enabling of a ship's derrick to slew to either side by means of two ropes
arranged and operated on substantially as herein before described.
Dated this Second day of December 1895.
EDMUND HUNT,
Applicant's Agent.