Improvements in Apparatus for Lowering and Securing Boats.
Year: 1889

page_text: Date of Application 30th Sept., 1889-Accepted, 2nd Nov., 1889
Improvements in Apparatus for Lowering and Securing Boats.
I JAMES WATKIN KINNIBURGH of the City of Wellington in the Colony of New
Zealand Civil Servant 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 :-
My invention relates to improvements in apparatus for lowering and securing boats
and has for its objects securing boats in the davits effectually and enabling them to be
lowered and freed rapidly effectually and safely.
In order that my invention may be most easily understood I will now proceed to
describe the same and for that purpose shall refer to the accompanying sheet of
drawings in which similar letters of reference indicate corresponding parts.
.
Fig. 1 is a side view of my apparatus.
Fig. 2 is an end view of the same.
Fig. 3 is an end view of the hooked piece (e. e).
(a. a) is the keel of an ordinary ship's boat.
(b. 6) are the ordinary pulley blocks and ropes for hanging a boat in the davits.
(c. c) are uprights fastened firmly to the keel and having jaws and pins (c¹ c¹) at
their upper ends and at their lower ends pullies (p. p) as shown.
(d. d) are books fitting into the jaws (c. c) and moving freely on the pins (c¹ c¹).
(d' d¹) are levers or arms forming part of the hooks (d. d).
(e. e) is an oscillating hooked piece working freely in the jaw (e) which jaw is
fastened firmly to the keel (a. a).
(f) is a pin for a purpose to be hereinafter described.
(r. r) are ropes (of wire by preference) having their inner ends hung loosely to the
oscillating hooked piece (e. e) and their outer ends hung loosely to the hooks (d. d).
It will be seen from this description of the several parts and by reference to the
drawings that my improved apparatus or arrangement consists in hanging the boat
in the davits by hooks (d. d) which are themselves held in position by the hooked
piece (e. e) and that so long as the boat is in its normal position in the davits and
the pin () in its place both the cords (r. r) are equally in tension or nearly so and
therefore the hooks (d. d) remain in a horizontal position and hold the boat securely
but in lowering the boat and after withdrawing the pin (f) so as to leave the
oscillating hooked piece (e. e) free if one end touches the water first or the water hits
the boat unequally the strain on the ropes (r.) is relieved at one end so that one end
being relieved or partially relieved of its weight the other hook is raised dragging
with it the cord (r) and tilting the oscillating hooked piece (e. e) so as to relieve it of
one of the ropes and thus break the connection between the two hooks (d. d) when the
other hook will be instantly free and the boat instantly at liberty and freed from the
davits. When it is necessary to again raise the boats the ropes are replaced on
the several hooks the pin (f) returned to its place and the boat will hang
securely.
Having now described and particularly ascertained the nature of my Invention and
how the same is or may be carried into effect I wish it to be understood that I do not
confine myself to the exact details for the hooks (d. d) may be fastened to the seats
and the pullies (p. p) attached to the keel nor do I confine myself to any specific
shape of hooks and in other respects the mechanical details may be varied by a skilled
workman without departing from the principle of my invention but what I claim as
novel and useful and desire to secure by Letters Patent is :-
1st. In an apparatus for lowering boats the combination of the hooks (d. d) with
the cords (. ) and pullies (p. p) or the mechanical equivalents of the same substan-
tially as described herein and illustrated in the accompanying drawings.
ID 21

page_text: 2nd. The combination of the hooks (d. d) with cords (r. r) and pullies (p. p) with
the hooked piece (e. e) substantially as described herein and illustrated in the accom-
panying drawings.
3rd. The apparatus for lowering and securing boats substantially as described herein
and illustrated in the accompanying drawings.
JAMES WATKIN KINNIBURGH.
John P. O'Donnell, M.I.M.E., &c.,
2, Great George Street, Westminster, Agent.