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

page_text: Date of Application, 8th Apr., 1890
Complete Specification Left, 7th Jan., 1891-Accepted, 7th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Holding and Detaching Gear for 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:-
My invention relates to improvements in gear such as is described in the
Specification of Letters Patent No. 8126 of 1884 granted to me and has for its
objects the providing of such gear wherein an eye on the lower blocks of the
lowering tackle can be easily and quickly locked to and unlocked from detaching
gear or hooks which are situated in the boat itself.
The gear constructed according to my present invention consists of frames (two
for each boat) attached to the boat in any suitable way for example by being bolted
to the upright bolts which pass through the boat keel. Each of the said frames
has centred in it a hook with a notch in the inner portion of its boss and there is
also centred to each frame a lever with a projection to engage with the said notch
in the boss of the hook and with a projection to prevent it from being put out of
its safe position by any weight put on it or on the lines connecting the levers of
the two frames.
On each frame is a projection in which is centred a self locking pawl. The top
end of the pawl stands up above the open part of the frame for receiving the eye in
the block and comes close to the point of the hook on the lowering tackle. This
pawl is so centred and weighted that it can only be moved one way and just to allow
the eye of the block on being pressed in to pass into the recess in the hook. When
the eye has passed over the top end, the pawl falls back to its upright position and
cannot be turned outwards from the point of the hook by the eye coming against it
from the inside, because the weighted end of the said pawl rests against the frame
or the upright to which the frame is bolted. The eye being thus locked can only
be unlocked by the hook being moved outwards. The levers of the two frames are
connected together by wire or other rope and the slip hook has a retaining eye for
holding the ends of the lines and for keeping the two parts thereof together so as to
be ready for connecting the lever. By this arrangement the gear is put in order
for locking the eyes of the lowering tackle to the boat before the weight of the boat
is put on the gear so that as soon as the said eyes are pressed into engagement
with the hooks the apparatus is ready for raising, no delay arising owing to the
weight of the boat being on the gear as the gear is ready for raising the boat
before its weight is on. In addition to the aforesaid attachment a pin can be used
instead of the lines for quickly raising the boat out of a dangerous sea.
When the eyes on lower block of the lowering tackle are to be unlocked the
slip is unrestrained by the retaining link being removed and then the weight of
the boat causes the levers and hooks to turn and release the boat from the eyes
of the lowering tackle.
Dated this 8th day of Anril 1890.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Holding and Detaching Gear for 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 in and by the
following statement :--
#
My invention relates to boat holding and detaching gear such as is described
in the Specification to Letters Patent No. 8126 of 1884 granted to me and has
for its objects the providing of such gear with means whereby an eye on the
lower blocks of the raising and lowering tackle can be easily and quickly locked
to and unlocked from the gear or hooks which are situated in the boat itself.
The gear constructed according to my present invention is illustrated in Figures 1
and 2 of the accompanying drawings Figure 1 representing the parts of the
gear in the position they occupy when attached to the raising and lowering
tackle and Figure 2 shewing the parts in the position they assume when the boat
is detached. A are metal frames (two for each boat) attached to the boat in
any suitable way for example by being bolted to upright bolts H in connection
with the boat keel. Each frame A consists of two cheeks a having centred
between them a hook B free to turn on the bolt or pin and provided with a
notch in the inner portion of its boss. There is also centred between the
cheeks of each frame a lever C having a projection to engage with the notch b³
in the boss of the hook B. A projection is provided on the boss of this lever to
prevent it from being put out of its safe position by any weight put on it or
on the lines D which connect together the levers of the two frames. On each frame
there is a projection E in which is centered at e a self locking pawl F. The top
end of this pawl extends into the open part or recess G in the frame which
receives the eye or hook d of the block of the raising and lowering tackle and
comes close to the point 3 of the hook B. This pawl F is so weighted that it can
only be moved one way just to allow the eye d on the block of the lowering tackle,
on being pressed, to pass the point 3 of the hook into the recess G in the frame.
When the eye has passed over the top end e² the pawl falls back to its upright
position and cannot be turned outwards from the point of the hook by the eye
coming againt it from the inside, because the weighted end of the said pawl rests
against the frame or the upright H to which the frame is bolted. The eye d being
thus locked in the recess G can only be unlocked by the point 63 of the hook B
being moved outwards. The levers C of the two frames A are connected together
by the wire or other ropes D and the slip hook I. The ropes D are attached to
the members gy of the slip hook and for keeping the two members together so as
to be ready for being quickly connected a rope or cord D is attached by one end
to one of the members the other end of the cord passing through an eye or loop h
on the other member and provided with a button to prevent it from becoming
detached. In order to connect the members g g the button end of the cord D' is
hauled so as to draw the members close together then the hook g³, on the member g³
is passed into the loop or eye of the member g and the tail end of the hook passed
through the loop h. The hook B is turned into position for locking the eye of the
- raising and-lowering tackle to the boat, before the weight of the boat is put on the
gear, and is locked in this position by the act of coupling the members of the slip
hook as described as by so doing the levers C of both frames are turned on their
centres.causing the projections c.thereon to enter the recesses 62 in the hooks Bas
shewn in Figure 1. To connect the boat to the raising and lowering tackle the
eyes d on the lower blocks thereof are pressed between the points 68 of the hooks B
and the upper projecting ends of the pawls F the pawls being forced by the eyes d
into the position shewn by dotted lines in Figure 1 to admit of the eye d entering
the recess G but which pawl resumes its normal position, shewn in full lines, as
soon as the eye has entered the recess. The boat is now ready to be raised or

page_text: lowered no delay arising owing to the weight of the boat being on the gear, as the
gear is ready for raising or lowering the boat before the weight thereof is on the
gear. In addition to or instead of the aforesaid attachment a pin can be used
connecting the lines D for quickly raising the boat out of a dangerous sea.
To release the boat from the raising and lowering tackle the loop is slipped off
the tail of the hook on the member of the slip hook I whereupon the
members g g will separate and then the weight of the boat causes the levers C and
hooks B to turn on their respective centres and admit of the eyes d of the lower
blocks of the tackle slipping out of the recesses G thereby releasing the boat.
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 :-
1. In holding and detaching gear for ships boats the combination with raising
and lowering tackle of a frame attached to the boat and carrying an engaging
hook retaining lever and self locking pawl, arranged to operate substantially as
and for the purpose hereinbefore described with reference to the accompanying
drawings.
2. In holding and detaching gear for ships boats the combination of the frame A
attached to the boat hook B, lever C, and self locking pawl F constructed and
arranged to operate substantially as hereinbefore described and illustrated in the
accompanying drawings.
3. In holding and detaching gear for ships boats the combination with the
frames A attached to the boat, hooks B, levers C, self locking pawls F, and slip
hook or coupling I the whole being constructed and arranged to operate sub-
stantially in the manner hereinbefore described and illustrated in the accompanying
drawings.
4. The general construction combination and arrangement of gear for holding
and detaching ships boats substantially as hereinbefore described and illustrated by
the accompanying drawings.
Dated this 7th day of January 1891
J. H. JOHNSON & Co.,
Agents.