Improvements in Gear for Holding and Detaching Ships' Boats.
Year: 1890

page_text: Date of Application, 18th Apr., 1890
Complete Specification Left, 19th Jan., 1891-Accepted, 21st Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Gear for Holding and Detaching Ships' Boats.
I, WILLIAM ROBSON NISBET, of Hadrian Road, Wallsend, Newcastle-on-
Tyne, Blacksmith, do hereby declare the nature of this invention to be as
follows:-
--
This invention relates to improvements in gear for holding and detaching ships
boats and has for its object to provide means whereby the boat may be easily
connected and locked to ordinary eyes in the lower blocks of the falls or lowering
tackle and unlocked and released therefrom whether or not the weight of the
boat be on the tackle. The gear constructed according to my present invention
may be attached to the boat in any suitable way for example I attach to each of
the bolts commonly used for lifting boats two sides or cheeks constituting a frame
which may be bolted or rivetted to the bolts. On each of these sides or cheeks are
two lugs or projections one of which is at a higher level than the other lugs or
projections. To the higher lugs or projections is centered a hook having a projection
or stop formed thereon and resting against a stud suitably situated to prevent it
turning too far towards the foreside, and in position to admit of the eye on the
lower block of the lowering tackle to pass under the point of the hook. The point
of the hook is suitably shaped to permit of it being easily pressed into the eye of
a self locking lever centered to the lower lugs or projections on the frame before
referred to. The eye in the self locking lever stands up above the said lugs
or projections to receive the point of the hook which when ready for hooking may
rest either on the outside or inside of the eye. The opposite end of this self locking
lever which is weighted may be of any length required and passes between the two
sides or cheeks of the frame and rests when in its locked or locking position on the
thwart of the boat. To an arm projection from the weighted end of this self
locking lever there is attached one end of a rope which may pass either along the
top bottom or side of the boat as most convenient and is attached at its other end
to an eye or ring to which a rope in connection with similar apparatus at another
part of the boat is also attached. By hauling on this eye the locking levers of
both apparatus will be caused to simultaneously release the points of the hooks in
the upper lugs or projection of both apparatus and thereby detach the boat after
which by again hauling on or jerking the rope the hook may be returned into
position to engage the eye on the block of the lowering tackle. These ropes may
be guided through pulleys and quadrants if desired but I prefer to use pulleys
only. The rings or eyes to which the ropes or lines are attached may be placed in
any convenient part of the boat to be readily accessible to those in charge.
To enable the gear to be operated from the deck of the vessel there is attached
to the weighted end of the self locking lever of each frame or apparatus a line or
rope or lines or ropes leading to the deck of the vessel so that by hauling on these
lines or ropes the self locking levers may be caused to release the hooks (even with
the weight of the boat thereon) so as to detach the boat.
DL: 1011L
Ail
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.

page_text: Improvements in Gear for Holding and Detaching Ships' Boats.
I, WILLIAM ROBSON NISBET, of Hadrian Road, Wallsend, Newcastle-on-Tyne,
Blacksmith, 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 improvements in gear for holding and detaching ships
boats and has for its object to provide means whereby the boat may be easily con-
nected and locked to ordinary eyes or hooks on the lower blocks of the falls or
raising and lowering tackle and unlocked and released therefrom whether or not the
weight of the boat be on the tackle. I will describe my invention with reference to
the accompanying drawings,
Figure 1 of which is a longitudinal section of a boat shewing the gear connected to
the raising and lowering tackle.
Figure 2 is a side elevation of the gear with the parts in the position they occupy
when released from the tackle.
Figure 3 shows the gear in position ready to be attached to the tackle the eye of
the tackle being in position to press down the hook of the gear for the purpose of
attaching the boat and
Figure 4 shews a modification in the arrangement of the ropes for releasing the
gear.
The gear constructed according to my present invention may be attached to the
boat in any suitable way. As shewn in Figure 1 for example to each of the
bolts A commonly used for lifting boats are secured two sides or cheeks a
constituting a frame B which may be bolted or rivetted to the bolts A. On each
of these sides or cheeks a are lugs or projections 2 the lugs & being at a higher
level than the lugs or projections b. To the higher lugs or projections is
centered a hook Chaving a projection or stop e formed thereon resting against a
stud d suitably situated to prevent the hook turning down too far and to ensure it
occupying a suitable position to admit of the engagement therewith of the eye
on the lower block of the raising and lowering tackle. The point of the hook is
suitably shaped to permit of it being easily pressed into the eye f on a self-
locking lever D which lever is centered to the lower lugs or projections b on the
frame B. The eye f stands up above the lugs or projections 2 in position to
receive the point of the hook C which when ready for hooking to the tackle may
either rest on the outside of the eye as shewn in Figure 3 or on the inside of the
said eye as shewn in Figure 1. The end of the self locking lever D opposite to
that which carries the eye fis weighted as shewn at g. This lever which may be
of any length required passes between the two sides or cheeks a of the frame B
and may rest when in its locked or locking position on the thwart of the boat as
shewn in Figure 1 or on any other suitable support. To an arm E projecting from
the hub or boss of this self locking lever D is attached one end of a rope F which
may pass along the top of the thwarts if desired or beneath the thwarts as shewn
by dotted lines in Figure 1 or along the bottom of the boat beneath the floor
boards as shewn by full lines or in any other direction as most convenient. This
rope F passes round guide pulleys and through an eye c² in a handle G and is
connected at its opposite end F to a lever D of a similar apparatus situated at the
opposite end of the boat. Figure 4 shews the ropes F F2 arranged along one side
of the boat and connected to a bar or plate G fitted to slide on guides H.
The hook C of the gear may be normally kept engaged with the eye f on the
lever D and when it is required to attach the gear to the raising and lowering
tackle the eye may be forced off the point of the hook C by the eye e on the
block of the tackle so as to pass the said eye e onto the point of the hook as
shown by dotted lines at Figure 1. By forcing the eye off the hook C the
weighted end of the lever D is raised into the position shown in Figure 2 and

page_text: when the eye e is passed onto the hook C the weighted end g of the said lever will
again descend and cause the loop or eye f to engage the point c³ of the hook and
thus prevent the eye e from slipping off the said hook. When the boat is to be
disengaged from the tackle this may be effected by an occupant of the boat hauling
the ropes F F by means of the handle or ring G whereupon the levers D of both
apparatus will be simultaneously turned on their centres the weighted ends of the
said levers being thereby raised and the eyes f removed from the hooks C which
hooks will then turn on their centres and slip out of engagement with the eyes e
on the blocks of the tackle as shown in Figure 2. The hook C is flung back by
the eye e (as it ascends) onto the end g of the lever D which lever is then allowed
to return to its normal position with the end g resting on the thwart or other
support. The hook C may be returned into position to be again engaged by the
eye f by jerking the rope F by means of the handle G so as to cause the end g of
the lever D to jerk the lever C into the required position shown in Figure 3.
When the ropes F F are arranged as shewn in Figure 4 the disengagement of
the boat may be effected by the occupant of the boat depressing by means of his
foot the slide G to which the ropes are attached.
To enable the gear to be operated from the deck of a ship or vessel there is
attached to the weighted end of the self locking lever D of each frame or
apparatus a line or rope F3 leading to the deck of the vessel so that by hauling on
this line or these lines the self locking levers D may be caused to release the
hooks C so as to detach the boat although the weight of the boat may be on the
hooks.
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 :-
1st. The combination and arrangement of parts constituting holding and detaching
gear for ships boats substantially as hereinbefore described and illustrated by the
accompanying drawings.
2nd. In holding and detaching gear for ships boats the combination of the
hook C and self locking lever D with its loop or eye f substantially as herein-
before described and illustrated in the accompanying drawings.
3rd. In holding and detaching gear for ships boats the combination with the
hook C of a self locking lever weighted at one end and having an eye at the
other end for engaging the hook C and means for readily disengaging the eye from
the hook whether or not the weight of the boat be on the hook substantially as
herein before described.
4th. In holding and detaching gear for ships boats the combination with the
hook C of a stop such as d against which projections on the hook come into contact
to limit the motion of the hook substantially as and for the purpose hereinbefore
described with reference to the accompanying drawings.
5th. In holding and detaching gear for ships boats the two levers D of the gears
connected to a single eye or handle G or its equivalent so as to operate both levers
simultaneously substantially as and for the purpose hereinbefore described with
reference to Figure 1 of the accompanying drawings.
Dated this 19th day of January 1891.
J. H. JOHNSON & CO.,
Agents.