Improvements in Boat Disengaging Gear.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Boat Disengaging Gear.
WILLIAM THOMAS Merddyn Holyhead Foreman Carpenters do hereby declare
the nature of this invention to be as follows:-
This invention has for its object an arrangement for automatically releasing
ships boats in davits by instantaneously removing all chocks, gripes or lashings.
Fig. I. shows a side view of a boat resting on chocks with gear connected.
Fig. II. shows an end view of a boat resting on chocks with gear connected.
Fig. III. shows an end view of a boat suspended in davits after gear has been
disconnected.
Fig. IV. shows a side view of a boat suspended in davits after gear has been
disconnected.
In carrying my invention into effect my plan is to have both sides of a boat
supported by chocks at each end, such chocks are resting on other bevelled lower
chocks or skids, that are secured to the deck or beams, as the case may be, as shown
in Fig. 1. D.
An iren rod E Fig. II. and III. is attached to each lower chock rotating freely
The iron rods have three
in iron eyes that are secured to such chocks with nuts.
prongs each, by which the upper chocks are held firmly in their places, they have
also two hooks each, the outer end being formed into one hook, the other hook is
attached to the rod between chocks and lever F. Fig. I. & 11.
The arrangement is worked by levers F Fig. I. The levers are connected by
two light wire ropes and slip-hook G. Fig. I.
The iron stays H Fig. 1. are provided as protectors, in case of interference with
slip-hook G.
Brass plates I Fig. III. are screwed on chocks to lessen friction, and are dove-
tailed into each other, so that upper and lower chocks are locked when gears are
connected.
The mode of action is as follows:-Take off the pins from stays H, and free the
slip-hook G, and the weight of the boat presses the upper chocks, so that they
slide down and fall flat on the deck, the boat then is suspended freely in the davits,
and is ready for swinging out, see Fig. III. and IV.
Dated this 16th day of September 1895.
WILLIAM THOMAS,
Applicant.
Improvements in Boat Disengaging Gear.
WILLIAM THOMAS Merddyn Holyhead Foreman Carpenters 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 has for its object an arrangement for automatically releasing
ships boats in davits by instantaneously removing all chocks, gripes or lashings: as
shown in drawings that were left with the Provisional Specification.

page_text: Fig. I, shows a boat resting on chocks with gear connected.
Fig. II, shows a cross section of a bont resting on chocks with gear
connected.
Fig. III, shows a cross section of a boat suspended in davits with gear
disconnected.
Fig. IV. shows a side elevation with gear disconnected.
The invention consists,-firstly :-in having a chock at each end of a boat, the
bottom edges of the upper chocks are bevelled to fit and rest on corresponding
bevelled lower chocks, that are secured to the deck or beams as the case may be,
shown in D. Fig. I.
The shafts E, Figs. Il and III, are carried by bearings or eyes secured to the
lower chocks.
Each shaft E has attached to it three short arms J. J. J. and one long arm or
lever F. and also two hooks K. K to which the gripes or lashings are fastened, as
shown in Figs. I and II. Each long arm or lever F has attached to its end,
farthest from the shaft, a short length of light wire or other rope, and when the
boat is in position on its chocks, the ends of the ropes are connected by the slip-
hook G. Fig. I.
H. H. are safety stays; one end of each is attached to the deck or beams, and
the other end pinned to the arms or lever F, and are for preventing the levers F F
being released in the event of anyone interfering with the slip-hook G.
Brass plates I. I. having dovetailed V shaped projections are attached to the
upper chocks and fit into dovetailed V shaped grooves in the brass plates 1*1* on
the lower chocks, when the chocks are in position under the boat. These brass
dovetailed grooves and projections act as guides, and allow the upper chocks
to slide down the inclined top surface of the lower chocks when the boat is to be
disengaged.
The action of my invention is as follows,-Wlien the boat is to be disengaged
for swinging out and lowering, the slip-hook G. and the stays H. H. are unhooked,
which releases the levers F. F and short arms J. J. J ; and as the short
arms J. J. J now no longer press against the upper chocks, these latter slide down
the grooves I. I. and fall flat on the deck, as shown in Figs. III and IV, leaving
the boat suspended in the falls P. P. ready for swinging out, and at the same
time the gripes or lashings are disengaged from the hooks, K. K.
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,-
-
1. The invention of releasing ships boats in davits of chocks and gripes or
lashings by freeing a slip-book, through the medium of the upper chocks being
bevelled and resting on corresponding lower chocks, that causes them automatically
to slide from underneath a boat and fall flat on the deck, leaving the boat suspended
in the falls.
2. The mode of securing the chocks in their places for supporting a boat with
iron shafts or rods rotating in bearings or eyes, such shafts having short arms to
press against the upper chocks by means of levers on the inner ends: attached to
the rods are hooks for gripes or lashings, also levers.
3. The manner of locking the upper and lower chocks by means of brass plates
made in a dovetailed form.
Dated this 8th day of June 1896.
WILLIAM THOMAS.