Improved Means for Securing Boats on Board Ship and Elsewhere, and for Expeditiously Releasing and Rendering them Ready for Lowering.
Year: 1897

page_text: Improved Means for Securing Boats on Board Ship and Elsewhere,
and for Expeditiously Releasing and Rendering them Ready for
Lowering.
I, CARL JOILANN FRIEDRICH DE Vos, of 70, Goudsche-Straat, Rotterdam, in the
Kingdom of Holland, Merchant, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improved means for berthing or securing boats on
board ship, landing stages, or elsewhere, and for expeditiously releasing the same
and rendering them ready for turning or running out and lowering.
In carrying out my invention, the boat is supported, near each end, in chocks
or supports shaped to fit the bottom of the boat, the said supports being pivoted
to foundation plates secured to the deck of the vessel. The chocks or supports
are connected together, preferably in the line of the keel of the boat, by means
of rods or links; a plate which slides in a guide secured to the deck of the vessel
being provided between the links. Through the plate and guide is passed a bolt
which serves to retain the chocks or supports in position when the boat is berthed.
The bolt may be released by hand or by means of any suitable mechanical appli-
ance. The boat when berthed is secured by lashings or by means of chains and
hooks, the latter engaging with the gunwale of the boat.
The davits are arranged to work in unison, being coupled together by means of
a rod. One of the davits carries a worm-wheel, the latter being actuated by a
worm and hand wheel. Thus, on turning the hand wheel, the worm effects the
rotation of the worm-wheel and thereby the turning simultaneously of both the
davits. The boat hanging by her tackles moves in the direction of the davits,
thereby upsetting the chocks.
The falling chocks may be used separately from the turning out gear above
described.
When it is desired to launch the boat, the lashings or other holdfasts are released
and the locking bolt withdrawn. The first movement in turning out the boat being
in the direction of the keel, the chocks are caused to fall over on their sides, the
boat being thus left suspended from the davits. These, together with the boat,
are then turned outwards and the boat lowered into the water.
100~

page_text: Improved Means for Securing Boats on Board Ship and Elsewhere,
and for Expeditiously Releasing and Rendering them Ready for
Lowering.
"
I, CARL JOHANN FRIEDRICH DE Vos, of 70, Goudsche-Straat, Rotterdam, in the
Kingdom of Holland, Merchant, 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:
This invention relates to improved means for berthing or securing boats on
board ship, landing stages, or elsewhere, and for expeditiously releasing the same
and rendering them ready for turning or running out and lowering.
Apparatus constructed according to my improved method is illustrated in the
accompanying drawings, whereof Fig. 1 is an end view and Fig. 2 a side view;
the dotted lines in the latter fig. representing the position of the chocks and
links when the boat has been released and rendered ready for turning out and
lowering.
In carrying out my invention, the boat is supported, near each end, in chocks
or supports a a shaped to fit the bottom of the boat, the legs a' a¹ of the said
supports being pivoted to foundation plates bb secured to the deck D of the vessel.
The chocks or supports are furnished with depending plates a preferably in the
line of the keel of the boat, and are connected together by means of rods or
links cc; a plate d, which slides in a guide e secured to the deck of the vessel,
being provided between the links. Through the plate & and guide e is passed a
bolt which serves to retain the chocks or supports in position when the boat
is berthed. The bolt may be released by hand or by means of any suitable
mechanical appliance. The boat when berthed is secured by lashings or by
means of chains g and hooks g¹, the latter engaging with the gunwale of the boat.
The davits h h are arranged to work in unison, being coupled together by
means of a rod i. One of the davits carries a worm-wheel k, the latter being
actuated by a worm 7 and hand wheel m. Thus, on turning the hand wheel m,
the worm effects the rotation of the worm-wheel and thereby the turning
simultaneously of both davits h h. The boat hanging by her tackles moves in
the direction of the davits, thereby upsetting the chocks a a.
The falling chocks may be used separately from the turning out gear above
described.
When it is desired to launch the boat, the lashings or other holdfasts g g¹ are
released and the locking bolt f withdrawn. The first movement in turning out
the boat being in the direction of the keel, the chocks a a are caused to fall over
on their sides, as shown in dotted lines in Fig. 2, the boat being thus left suspended
from the davits. These, together with the boat, are then turned outwards and
the boat lowered into the water.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I claim :-
1. The improved means for securing boats on board ship and elsewhere and for
expeditiously releasing and rendering them ready for turning or running out
and lowering, constructed or operating substantially as described with reference
to the accompanying drawings.
2. For securing boats on board ship and elsewhere and for expeditiously releasing
and rendering them ready for turning or running out and lowering, the improved
means constructed or operating substantially as herein described, and comprising

page_text: pivoted chocks connected by rods or links and a retaining bolt for securing and
releasing the chocks.
3. For use in securing boats on board ship and elsewhere and for expeditiously
releasing and rendering them ready for turning or running out and lowering,
the combination of the falling chocks and securing and releasing gear with turning
out gear comprising coupled pivoted davits and worm gearing, arranged or
operating substantially as set forth.
4. In apparatus for securing boats on board ship and elsewhere and for expe-
ditiously releasing and rendering them ready for turning or running out and
lowering, the combination, with the pivoted chocks a a, of the links c c, plate or
slide d, guide e and bolt f, arranged or operating substantially as set forth.
Dated this 9th day of May 1898.
For the Applicant,
G. G. M. HARDINGHAM,
Chartered Patent Agent, 191, Fleet Street, London, E.C.