Improvements relating to the Hoisting and Stowing of Ships' Boats.
Year: 1889

page_text: Date of Application, 27th Apr., 1889
Complete Specification Left, 25th Jan., 1890-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements relating to the Hoisting and Stowing of Ships'
Boats.
We, ARCHIBALD DENNY, of Leven Ship Yard, Dumbarton, in the County of Dum-
barton, North Britain, Shipbuilder, and GEORGE BROWN, of the same place, Draught-
man, do hereby declare the nature of this Invention to be as follows, that is to
say:
This Invention relates to arrangements for hoisting and stowing ships' boats in which
ordinary swivelling davits or similar devices are employed, and in which the boat is
placed on the ship's rail or inboard when hoisted up; and the object is to provide the
boat with appliances admitting of the tackle ropes being vertical or nearly so when the
davits are turned inwards as well as when they are turned outwards.
In carrying out the Invention there is fixed at each end of the boat a guide bar
which is in the central vertical plane of the boat and may be horizontal or slightly
inclined in either direction. On each guide bar there is placed a kind of block having
cheeks between which the bar passes, an antifriction roller to bear up against the
underside of the bar, and a bow or cross pin at the top for the hook of the bottom
tackle block to engage in. When the tackle gear is connected to the boat with the
davits in their outward positions the blocks on the guide bars are at their outermost
positions on the bars and may be retained there by pins entered into holes in the bars.
After the boat is hoisted or when it is about to be hoisted the retaining pins are with-
drawn and then when the boat has been hoisted and the davits are turned inwards the
blocks on the bars run to the inner ends of the bars, so as to place themselves under
the top blocks at the ends of the davits.
D Tunute ninth dow of Anril 1889
EDMUND HUNT,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements relating to the Hoisting and Stowing of Ships'
Boats.
We, ARCHIBALD DENNY, of Leven Ship Yard, Dumbarton, in the County of Dum-
barton, North Britain, Shipbuilder, and GEORGE BROWN, of the same place, Draughts-
man, 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:-
This Invention relates to arrangements for hoisting and stowing ships' boats, in
which ordinary swivelling davits or similar devices are employed, and in which the
boat is placed on or above the ship's rail, or inboard, when hoisted up; and the
object is to provide the boat with appliances admitting of the tackle ropes or falls
being vertical or nearly so when the boat is being taken inwards, from the outward
position on to the rail or outwards from the inboard on to the rail, and without its
being necessary to angle the boat.
In carrying out the Invention a horizontal or inclined guide bar is fixed at each end
of the boat, and on each bar there is a block or sling fitted with a roller at its lower
part to run and bear up against the bottom of the bar, and with its upper part
arranged to be connected to the hoisting tackle. When the davits are turned outwards
for hoisting or lowering the boat the blocks or slings with the rollers are at the outer
ends of the inclined bars but as the boat swings in from the outward position or out-
wards from the inboard position the rollers run towards the centre of the boat, the

page_text: tackle ropes remaining vertical or nearly so, with the result that very little effort
is needed to move the boat inwards or outwards, and no angling of the boat is
required.
And in order that our said Invention and the manner of performing the same
may be properly understood, we hereunto append a sheet of explanatory drawings
to be hereinafter referred to, and representing parts of a ship's boat as fitted with
our improved appliances. In these drawings the same reference letters are used
to mark the same or like parts wherever they are repeated.
Figure, 1, is a sectional plan of one end of the boat, and figure, 2, is a corre-
sponding longitudinal vertical section. Figure, 3, and 4, are enlarged views of
parts of figure, 1, and 2; and figure, 5, is a transverse vertical section corre-
sponding to parts of figures, 3, and 4.
At each end of the boat there is fixed a guide bar, A, which is in the central
vertical plane of the boat and which may be horizontal, or inclined in either
direction. Its inner end is fixed to a stanchion, B, which is fixed to the keel, C,
of the boat and to a thwart, D, and its outer end is made with a palm or flange, E,
by which it is bolted to the stem, F, of the boat. On each guide bar, A, there
is placed a kind of block, G, having cheeks between which the bar passes, an
antifriction roller, H, to bear up against the underside of the bar, and a bow or
cross pin at the top, for connecting it to the bottom tackle block, J, of the
hoisting gear. When the hoisting gear is connected to the boat with the davits
in their outward positions each block, G, on its guide bar is at its outermost
position on the bar, and can be retained there by a pin, K, fitted to turn on a
fixed pin, and held in the retaining position as shown in the drawings, by a
handled locking piece, L. This locking piece, L, is fitted to turn in a fixed socket, M,
and is made with a half boss which when in one position holds the pin, K, but allows the
pin to turn away when it is turned over. After the boat is hoisted or when it is
about to be hoisted, the retaining pins, K, are set free, and then when the boat has
been hoisted and the davits are turned inwards, the blocks, G, on the bars, A,
run to the inner ends of the bars, so as to place themselves under the top blocks
at the ends of the davits.
Having now particularly described and ascertained the nature of our sail
Invention and in what manner the same is to be performed, we declare that what
we claim is-
Providing a ship's boat with longitudinal bars fixed at each end and fitted with
blocks for the attachment of hoisting gear, such blocks being capable of moving
along the bars so as to be vertically or nearly so under the top hoisting blocks
in different positions of the davits, substantially as hereinbefore described.
Dated this Twenty-fourth day of January 1890
EDMUND HUNT,
Applicants' Agent.