Improvements in Boat Detaching Gear.
Year: 1890

page_text: Date of Application, 14th Aug., 1890
Complete Specification Left, 10th Apr., 1891-Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Boat Detaching Gear.
I, JAMES SAMPLE, of Industrial Terrace, Wallsend on Tyne, in the County of
Northumberland, Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide detaching gear which will operate:
1st. Simultaneously at both ends of the boat by pulling upon two lanyards which
unite into one at or near the centre of the boat.
2nd. At either end of the boat independently of the other end when necessary.
3rd. Automatically and simultaneously at both ends when the boat reaches the
water.
At each end of the boat is a tumbling hook standing just above the deck working
which extends down to the
upon a bolt in a double eye on top of a "stanchion
keel. The hook has upon it a tail piece which when the boat is suspended from
the tackles is held down by a "bridle" working on a pin in a projecting arm on the
double eye, the lower arm of the "bridle" carrying a weight at such an angle
that it tends to keep the "bridle" engaged with the tail piece and the hook closed.
From the weight at each end of the boat a lanyard" or hand-line is carried over
leading sheaves below the "thwarts" towards midships of the boat when the two
join into one which leads toward the centre line over sheaves and terminates in a
handle which, being pulled, disengages the "bridles" at both ends simultaneously
and the hooks fall open and detach the boat from the blocks.
::
When it is required to detach either end of the boat separately, a lanyard is
attached to an eye on top end of each "bridle" and by pulling either of these the
"bridle" is disengaged at either end and the corresponding hook falls open and
detaches the shackle.
Automatic detaching is effected by connecting the handle, in which the two
"lanyards" terminate by a chain or cord to a heavy weight the momentum of
which, when the boat is water borne, operates by gravity to pull the two lanyards
so as to disengage the bridles and both hooks fall open simultaneously and detach
the boat.
The tumbling hooks are of peculiar shape to facilitate the attaching of the
shackles and also to prevent them being liable to slip out of the hooks, should the
boat be lifted by a wave, without need of "mousing" the noses of the hooks,
though this is provided for when the boat is hanging at the "davits."
The gear is strong, simple in construction and action, economical in first cost
and maintenance and has no projecting parts except the hooks and their double
eyes all other parts being under the thwarts and out of the way of the boat's
crew.
1800
T. J. DANSON,
Per L. W.

page_text: COMPLETE SPECIFICATION.
Improvements in Boat Detaching Gear.
1, JAMES SAMPLE, of Industrial Terrace, Wallsend-on-Tyne, in the County
of Northumberland, Engineer, do hereby declare the nature of said invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
The object of this invention is to provide detaching gear which will operate:
1st. Simultaneously at both ends of the boat by pulling upon two lanyards which
unite into one at or near the centre of the boat.
2nd. At either end of the boat independently of the other end when necessary.
3rd. Automatically and simultaneously at both ends when the boat reaches the
waber.
ઃ
At each end of the boat is a tumbling hook standing just above the deck
working upon a bolt in a double eye on top of a stanchion" which extends down
to the keel. The hook has upon it a tail piece which, when the boat is suspended
from the tackles, is held down by a "bridle" working on a pin in a projecting arm
on the double eye, the lower arm of the "bridle carrying a weight at such an
angle that it tends to keep the "bridle" engaged with the tail piece and the hook
closed. From the weight at each end of the boat a "lanyard" or hand line is
carried over leading sheaves below the "thwarts" towards midships of the boat
when the two join into one which leads toward the centre line over sheaves and
terminates in a handle which, being pulled, disengages the "bridles" at both ends
simultaneously and the hooks fall open and detach the boat from the blocks.
":
When it is required to detach either end of the boat separately, a lanyard is
attached to an eye on top end of each bridle "and by pulling either of these the
"bridle is disengaged at either end and the corresponding hook falls open and
detaches the shackle. This enables the boat to be instantly slipped when being
towed behind the vessel or if accidently dragged by the tackles.
"
Automatic detaching is effected by connecting the handle, in which the two
"lanyards "terminate by a chain or cord to a heavy weight the momentum of
which, when the boat is waterborne, operates by gravity to pull the two "lanyards
so as to disengage the "bridles" and both hooks fall open simultaneously and
detach the boat.
The tumbling hooks are of peculiar shape to facilitate the attaching of the
shackles and also to prevent them being liable to slip out of the hooks, should the
boat be lifted by a wave, without need of "mousing" the noses of the hooks,
though this is provided for when the boat is hanging at the "davits."
The gear is strong, simple in construction and action, economical in first cost
and maintenance and has no projecting parts except the hooks and their double
eyes all other parts being under the thwarts and out of the way of the boats
crew.
DESCRIPTION OF DRAWINGS.
Fig. 1 represents a longitudinal section of an ordinary ships lifeboat, hanging to
the tackle blocks, as fitted with my detaching gear.
Fig. 2 represents a plan of same with automatic detaching by the momentum of
a heavy weight.
Fig. 3 represents a partial plan with hand detaching by pulling on a lanyard or
chain.
Figs. 4 and 5 represent to a larger scale details of the tumbling hooks and their
operating mechanism Fig. 4 shewing the bridle pulled off the tail of the hook, by
the lanyard attached to a lever and leading to the middle of boat, by hand or the
automatic action of a heavy weight and Fig. 5 the bridle pulled off by the lanyard
attached direct to its upper end.

page_text: On all the figures the same letters refer to the same or corresponding parts.
A A' are brackets either forged upon or attached to the stanchions B B at each
end of the boat upon bolts C C¹ on which the hooks turn. DD' are the tumbling
hooks each having upon it a tail piece E E' which are kept down and the hooks
closed by bridles FF working on fulcrums G G carried on projecting arms from
the brackets A A. J Jare the shackles of the tackle blocks which are prevented
slipping out of the hooks, should the boat be lifted by a sea when hanging from
the davits, by the detents K K (shewn in detail by Figs. 4 and 5) which act
instead of mousing" the hooks but which do not prevent the shackles being
detached from the hooks by hand when required and offer no obstruction to the
insertion of the shackle into the hook. The peculiar shape of the lower inside
portion of the hook, see Figs. 4 and 5, also tends to prevent the shackle coming
out of the jaw. In Figs. 1. 2. 3. and 4 the disengaging of the bridles F F is
effected by the lanyards or chains L L' which unite into one at or near the centre
of the boat and lead thence separately over guide sheaves under the thwarts to
each end of the boat where they take hold of lever arms M M' forming an
extension of the "bridles" and carrying balance weights which tend, in any
position of the boat, to prevent the "bridles" disengaging accidentally. In Figs. 1
and 2 the weight N is shown by which automatic detaching is effected simul-
taneously at both ends as soon as the boat is water borne and in Fig. 3 the lanyards
or chains L L terminate in a handle O which being pulled in either direction
simultaneously detaches both hooks. In Fig. the lanyard or chain L as shewn
may be operated either by a heavy weight or by pulling by hand in either case the
detaching of both hooks being simultaucous. In Fig. 5 the lanyard is attached to
the top of the bridle and is pulled direct by a man at that end of the boat thus
if a boat is being towed behind a vessel or accidentally from the "falls "-
dangerous position in a seaway-the hook can be instantly slipped out and the boat
set free.
-a most
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
First. The improvements in boat detaching gear, comprising the various parts
in their several combinations, constructed and operating substantially as described
and shewn, by which the following operations may be performed viz. :-
A. The simultaneous disengaging of the hooks from the tackles at both ends
by pulling a handle at, or near, the centre of the boat as shewn on Figs. 1,
3 and 4 of drawing.
B. The simultaneous disengaging of the hooks from the tackles by the
momentum of a weight falling when the boat is waterborne as shewn by
Figs. 1. 2 and 4 of drawing.
C. The simultaneous disengaging of both hooks, or of the hook at one end of
the boat, by pulling lanyards attached direct to the bridles, or either of the
lanyards, when the boat is being towed or accidentally dragged by the
tackles as shewn by Fig. 5 of the drawing.
Second. In boat detaching gear having vertical tumbling hooks the application
thereto of a "detent" kept in position by a balance weight or spring for the purpose
of preventing the shackle accidentally slipping out of the hook as shewn in detail
on Figs. 4 and 5.
O
1001
T. J. DANSON, F.I.P.A.,
Newcastle-upon-Tyne, Agent for Applicant.