IMPROVEMENTS IN DETACHING GEAR FOR SHIPS BOATS ANCHORS OR LIKE PURPOSES to be as follows:
Year: 1884

page_text: I WILLIAM ROBSON NISBET West View Wallsend Newcastle on Tyne Blacksmith
do hereby declare the nature of said Invention for "IMPROVEMENTS IN DETACHING
GEAR FOR SHIPS BOATS ANCHORS OR LIKE PURPOSES to be as follows:-
"
My Invention has for its object to provide gear for detaching ships boats anchors.
or for other like purposes which will enable the boat, anchor or other article to be
readily detached, in the case of a boat simultaneously and instantaneously detaching
both ends of the boat whether the boat be resting on the water or not and at
whatever speed the vessel may be going and without the gear going with the boat-
The gear is also automatic and cannot be detached by a sea striking one end only
of a boat held thereby but will detach when the boat is water borne at both ends.
I will describe the gear constructed according to this Invention with reference to
its use for a boat-It consists of frames (two for each boat) which are suspended
by means of ordinary blocks and swivel eyes from the davits or other place the
connection between the swivel eyes and the frames being preferably made by a
square (or equivalently shaped) pin to keep the frame in a vertical position. To
each frame is centred a hook for receiving the eye bolts or ring bolt or other
suitable arrangement attached to the boat, the bearing of the eye bolt on the said
hook being outwards of the vertical plane in which is situated the centre upon
which the hook turns. The inner portion of the boss of the hook has a notch or
notches in it in which engages a projection or projections on a short arm of a lever
centred in the frame which may be retained in position to secure the hook by means
of a locking or safety pin or its equivalent. The lever is so constructed that
it cannot be put beyond its proper position so ensuring the detachment in
circumstances required only. The levers may be connected together by ropes or
chains and a slip hook but they may be manipulated independently of each other if
desired. The frame is so arranged that in each case the point of the hook is close
to the frame when the safety pin is in its place or the connecting line is fastened
and thus the boat cannot be accidentally unlocked. In detaching the boat the
locking or safety pin or its equivalent is removed and the slip hook is unfastened

page_text: or the levers otherwise operated and then the hooks carried by the frames turn
down and release the boat. The automatic action is caused by the lever falling
owing to their weight and thus releasing the hook without the connecting line
being unfastened as when the boat is waterborne the tension is taken off the Blocks
and frames and the two frames are freed to move towards each other. The
apparatus when used for releasing anchors or for analagous purposes may incline
upwards at an angle of say about 45 degrees instead of being at right angles to the
frame so as to clean the anchor.
By the arrangement of Gear above described the apparatus is always ready to be
attached to the boat.

page_text: I WILLIAM ROBSON NISBET of West View Wallsend Newcastle on Tyne
Blacksmith do hereby declare the nature of said invention for IMPROVEMENTS IN
DETACHING GEAR FOR SHIPS BOATS ANCHORS OR LIKE PURPOSES and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My said Invention has for its object to provide gear for detaching ships boats
anchors or for other like purposes which will enable a boat anchor or other article
to be readily detached and (in the case of a boat) simultaneously and instantaneously
detaching both ends of the boat whether the boat be resting on the water or not
and at whatever speed the vessel may be going and without the gear going with
the boat.
The gear is also capable of acting automatically but cannot be detached by a sea
striking one end only of a boat held thereby it will however detach the boat when
the boat is sufficiently water borne.
And in order that my said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 of the drawings is a side elevation of my improved detaching gear in
its position when engaging or supporting an article and Figure 2 represents in side
elevation and edge view the gear in the position it occupies when disengaged.
Figures 3. 4. 5 and 6 illustrate the gear as applied to a ships boat and Figure 7
represents the gear as supporting a ships anchor.
Referring to Figures 1 and 2 A is a metal frame consisting of two checks a a
connected together by bolts or otherwise between which checks a hook B is fitted to
turn on a centre b This hook is provided with a notch or recess c which (when the
hook is in its engaged position as in Figure 1) engages a projection d formed_on
the short arm of a lever D centred at e between the checks of the frame A. The
hook is thus prevented from turning on its centre until it is released by depressing
the long arm of the lever D so as to remove the projection & out of the recess c
E is a safety or locking pin which when inserted in a hole fin the frame A beneath
the lever D will prevent the lever being accidentally depressed.
I will now describe the gear with reference to its use for a ships boat (as shewn
in Figures 3 to 6) Two frames A are provided for each boat which frames are
suspended by means of ordinary blocks F and swivel eyes g from the davits or
other place of suspension the connection between the tackle and the frames A being
preferably made by a square or equivalently shaped pin H to keep the frame in a
vertical position.
The book B of each frame receives an eye bolt I or ring bolt or other suitable
arrangement attached to the boat the bearing of the eye bolt on the said hook
being outwards of the vertical plane in which is situated the centre b upon which
the hook turns When the hook is inserted in the eye bolt the lever D is turned
so as to cause the projection d on the short arm thereof to engage with the notch
or recess c on the inner portion of the boss of the hook and may be retained in
position to secure the hook by means of the locking or safety pin E or its
equivalent. The lever D is also provided with a projection g₁ which by coming
into contact with a projection h on the hook B prevents the said lever from being

page_text: put beyond its proper position when engaging the eye bolt thereby ensuring the
detachment of the boat only when required.
The levers D of the two frames A may be manipulated independently of each
other if desired but I prefer to connect them together by ropes or chains K and a
slip hook or coupling L which may consist of a shackle i (Fig 5) secured to the
lever D of one of the frames A. by a chain or rope K, the lever of the other frame
having connected thereto by a chain and link l, a hook k. This hook is centred so
as to be capable of turning on the link 7 and is provided with a tail piece k¹
to which is attached one end of a cord or chain m the opposite end of which cord
is passed over a cross bar in the shackle i and is provided with a button to prevent
the shackle and hook being entirely separated from each other, and to enable them
to be readily connected when required.
In order to connect the parts i and k the button end of the cord or chain m is
bauled so as to bring the parts close together the hook k is then passed under and
caused to embrace the front bar of the shackel i, the cord or chain m being hauled
taut and then passed once or twice round the exterior of the shackle and tail
piece or otherwise secured so as to prevent it from slipping.
When the hook B is in its engaging position the point of the hook is close to the
frame A and is maintained in that position by inserting the safety pin E in its place
beneath the lever D or by connecting the lines or chains K of the two levers D by
means of the slip hook or coupling L thus the boat is prevented from being
accidentally detached-In order to detach the boat the locking or safety pins E
are removed from beneath the levers D and the slip hook or coupling L unfastened
or released; the levers D will then turn on their centres into the position shewn in
figure 5, the projections d being thereby removed from the recesses c and allow the
hooks B to turn down and release the boat.
The automatic action of the gear is as follows: The boat being suspended from
the davits the locking pins E are removed from beneath the levers D and the boat
lowered by means of the pulleys F until it enters the water, and as soon as the
weight of the boat is removed from the hooks B and is borne by the water the
levers D will descend and thus release the hooks without uncoupling the slip hook,
as when the boat is water-borne the tension is taken off the blocks F and frames A,
and the two frames are free to move towards each other as shewn in Figure 6.
By the arrangement of gear above described the apparatus is always ready to
be attached to the boat.
When the gear is used for releasing anchors or for analogous purposes the lever D
instead of being at right angles to the frame A may incline upwards at an angle of,
say about 45 degrees as shewn in figure 7, so as to clear the anchor, the lever being
maintained in its elevated position by a rope n attached to any suitable support.
In order to release the anchor the locking pin E is removed and the chain or
rope slackened or let out. The lever D will then turn so as to disengage the
hook B which being free will turn on its centre and allow the anchor to slip
therefrom.
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
First, In detaching gear for ships boats anchors or the like, the combination
with raising and lowering tackle of a frame carrying an engaging hook and
retaining lever constructed and arranged to operate substantially in the manner
hereinbefore described and illustrated in the accompanying Drawings.
Second, In detaching gear for Ships Boats Anchors or the like the combination
of the frame A, hook B, lever D and locking pin E constructed and arranged to
operate substantially as herein before described and illustrated in the accompanying
Drawings.
Third, In detaching gear for Ships Boats Anchors or the like, connecting
together the levers D of the two frames A by means of lines or chains and a slip

page_text: hook or otherwise so as to allow the levers D, to turn on their centres automatically
when the weight or Strain of the boat or the like is removed from the hooks B and
is borne by the water or otherwise, thereby allowing the hooks B to turn and
release the boat or the like substantially as herein before described with reference to
Figures 3, 4, 5 and 6 of the accompanying Drawings.
Fourth, In detaching gear for Ships Boats Anchors or the like, the combination
with the frames A, hooks B and levers D, of the slip hook or Coupling L,
constructed substantially in the manner herein before described with reference to
Figures 3, 4, 5 and 6 of my Drawings.
Fifth, The general construction and arrangement of gear for supporting and
detaching Ships Boats anchors or for other like purposes substantially as herein-
before described and illustrated by the accompanying Drawings.
Dated this 30th day of Sentember 1884.