Year: 1887

page_text: Date of Application, 5th Apr., 1887
Complete Left, 28th Dec., 1887
Complete Accepted, 10th Feb., 1888
COULSON DOUGLAS of 20 Harold Street Sunderland in the County of Durham
Master Mariner do hereby declare the nature of this invention to be as follows:-
I claim improvements in boats davits being lowered and lifted over ships side by
eccentric motion, eccentrics working between deck standards both eccentrics being
conected by one rod passing through standards and by one or two levers the outer
chocks hinged to davits & placed or displaced under boats & by lashings attached to
outer end of chocks & passed over boat & hook on davits and set up to lever on
deck which is arranged to let go instantaneously. I can by my arrangement either
lower the davits to its required position over ships side or let the davits fall out as
soon as the chocks are detached the eccentric is designed to stop the davit suddenly
falling out and I have a pawl fitted to davits at the back, and pawl rack on standards
to stop the davitts from coming in board when the ship is rolling I also claim the
right to apply an arrangement by which I lift the outer chock into position under
the boats with the motion of the eccentric I use in lifting or lowering the davits.
Dated this 5th day of April 1887.

page_text: I COULSON DOUGLAS of 20 Harold Street Sunderland in the County of Durham
Master Mariner 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 consist as follows, There are two Metal Standards placed on deck,
each consisting of two Chocks bolted together between which the Davits work, as
shown in Fig. A. in the accompanying Drawing.
The Davits are lowered and lifted by eccentric motion as shown in Fig. A. The
outer or loose Chocks are hinged to Davits and are kept in position by Boats lashings
as shown in Fig. A. when the Boat is at rest in Chocks.
The Davits shown in dotted lines, is the position of Davits, after the Boat has been
lowered over the side of the Ship, showing loose Chocks and Lashings hanging
down.
On the top of Standards, there are Pawl racks and on back of Davits, there is a
Pawl which prevents the Davits coming back when the Ship rolls in a seaway.
Fig. B. shows the Shaft that passes through both Standards on which are fixed the
Eccentrics by which the Davits are lowered and lifted, on each end of Shaft are
fixed Hand levers for working the Eccentrics as shown in Fig. A.
Fig. C. is a Bar with short levers to which the Boats lashings are attached. There
are four Levers with plain ends, the two End Levers to which are attached the
Lashings connected with the loose Chocks, the two Intermediate Levers to which are
attached the extra Lashings. There is also one Lever, in centre of Bar, in which
there is an Eye formed to pass over a Staple, fixed to Deck and fastened by a Keep
pin, when the Pin is withdrawn, the Lever, is let go and the Boats lashings are
detached instantaneously, leaving the Boat free to be lowered by the eccentric
motion.
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
The Eccentric motion and the loose Chocks, Lashings and Detaching gear and
Racks on top of Standards and Pawl.
Dated this Twentieth day of December 1887