Improvements in and relating to Boat Lowering Appliances.
Year: 1898

page_text: PROVISIONAL
SPECIFICATION.
Improvements in and relating to Boat Lowering Appliances.
I, FRANK RUSSELL PATEY, of Arranmore, Malone Park, Lisburn Road, Belfast,
in the County of Antrim, Shipmaster, do hereby declare the nature of my inven-
tion to be as follows:-
This invention has reference to and comprises improvements in and relating to
boat lowering appliances, more particularly adapted for use on board ship, but
capable of application in other situations, whereby the boat can be lowered into
the water with ease and safety even though the ship should have a considerable
list.
According to this invention when applied on board ship the boat is suspended
from an oscillating framework instead of the ordinary davits, constructed and
operated all as follows:-
The framework consists of two vertical standards connected at their tops by a
horizontal transverse bar or stay, or it may be made in one piece of a bar bent
into the requisite form.
The vertical standards are jointed to the deck near the ship's side, at a distance
apart to allow of the boat passing between, in a manner to permit of an oscillating
movement outward and inward.
The boat is suspended from the horizontal bar of frame by ropes passing
through blocks secured to the bar and carried to the drum of an ordinary winch
erected on the deck within the boat or boats, and furnished with a brake and which
may be actuated by hand or otherwise. To the winch or other convenient part
a small oscillating frame is jointed, and rotating in this frame is mounted one
end of a long screwed spindle held in position by a nut on its end. The screwed
spindle is rotated by means of hand actuated bevel gearing; one bevel wheel
being secured on the screwed spindle and the other on the frame carrying same.
Instead of bevel gearing worm screw and wheel gearing may be employed. The
screwed spindle screws into a nut secured to the ends of two angled stays which
are connected to the horizontal bar of the framework by eyes, stops being pro-
vided on the, bar to obviate any tendency to convergence of the angled stays.
The action is as follows:-When it is desired to lower a boat over the ship's
side, the boat is first raised off its chocks by the winch, and the oscillating frame-
work and boat is gradually pushed outward by rotating the screwed spindle until
the maximum distance from the ship's side is reached when the boat is lowered
into the water.
With this arrangement two boats may be used in conjunction with one lower-
ing appliance, one boat being carried on the deck inside of the other.
1000
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow,
Agents.

page_text: I, FRANK RUSSELL PATEY, of Arranmore, Malone Park, Lisburn Road, Belfast,
in the County of Antrim, Shipmaster, do hereby declare the nature of my inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement in writing reference being
made to the accompanying drawings:
--
This invention has reference to and comprises improvements in boat lowering
appliances more particularly adapted for use on board ship; but capable of applica-
tion in other situations, whereby the boat can be lowered into the water with ease
and safety even though the ship should have a considerable list or inclination to
one side.
And in order that my said invention may be properly understood I have here-
unto appended one sheet of illustrative drawings in which Figure 1 is a side
view, from amidships, of the appliance with the boat stowed in its chocks, and
Figure 2 is an end view showing the boat suspended ready for lowering into the
water.
Referring to these drawings:-
According to this invention when applied on board ship the boat is suspended
from an oscillating framework instead of the ordinary davits, constructed and
operated all as follows.
The framework consists of two vertical standards a connected at their tops by
a horizontal traverse bar b or stay, or it may be made in one piece of a bar bent
into the requisite form. The vertical standards are jointed to the deck near the
ship's side at c, at a distance apart to allow of the boat passing between, in a
manner to permit of an oscillating movement outward and inward.
The boat is suspended from the horizontal bar b of frame by ropes passing
through blocks d secured to the bar and carried to the drum e of an ordinary
winch erected on the deck near the boat or boats, and furnished with a brake,
and which may be actuated by hand as shown or otherwise. To the winch or
other convenient part a small oscillating frame f is jointed, and rotating in this
frame is mounted one end of a long screwed spindle g held in position by a nut,
or a pin engaging with a groove, on its end and supported by the parallel rods h
and crosshead i sliding thereon.
The screwed spindle g is rotated by means of a hand actuated screw worm j
and worm wheel k or bevel wheel gearing may be used.
The screwed spindle g screws into a nut 7 secured to the ends of two angled
stays m which are connected to the horizontal bar of the framework by eyes n,
stops o, being provided on the bar b to obviate any tendency to convergence of
the angled stays.
The action is as follows:-When it is desired to lower a boat over the ship's
.side, the boat is first raised off its chocks by the winch, and the oscillating frame-
work and boat is gradually pushed outward by rotating the screwed spindle until
the maximum distance from the ship's side is reached, or preferably when the
oscillating frame forms an angle of 45° with the deck, when the boat is lowered
into the water.
With this arrangement two boats may be used in conjunction with one lower-
ing appliance, one boat being carried on the deck inside of the other, or three may
be used one carried suspended to the oscillating frame.

page_text: 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:―
First. Boat lowering appliances constructed and arranged substantially as herein
described in reference to the accompanying drawings.
Second. In a boat lowering appliance the combination comprising an oscillat-
ing frame, a screw spindle for oscillating same actuated by worm wheel or like
gearing, and means for raising and lowering the boat substantially as herein
described in reference to the accompanying drawings.
Third. In a boat lowering appliance the combination comprising an oscillating
frame and a screwed spindle, actuated by worm wheel gearing, acting on its upper
part to oscillate same substantially as herein described and illustrated by the
accompanying drawings.
Dated
the 1st July 1079.
W. R. M. THOMSON. & Co.,
96, Buchanan Street, Glasgow,
Agents
W. R. M. THOMSON. & Co.,
96, Buchanan Street, Glasgow,
Agents