Improvements in Boat Lowering Tackle.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Boat Lowering Tackle.
I, GEORGE VINCENT PIPER of Fowey, Cornwall, Master Mariner, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in connection with the lowering of boats
and has for its object to provide a simple means by which the tackle can be
released automatically from the boats when the latter touch the water.
In carrying out my invention I propose to employ a link or ring passing through
the seat of the boat and extending vertically, the lowering tackle being connected
to this ring or link. This link is not perinanently fixed to the seat, but when
released can be. entirely withdrawn, remaining in connection with the chain or line
by which the boat is lowered.
To connect the boat to. this link a strong pivoted hook is employed, the end
of which passes through the link engaging with it and fixing it to the boat. This
hook is arranged so that when released it will fall by its own weight, but the
weight of the boat will keep it engaged with the link.
When the boat reaches the water and is supported by it, the link or ring is
loosened and the hook consequently drops disconnecting the boat from the tackle.
To prevent the hook accidentally dropping while the boat is in the davits owing
to any sudden blow, a pin or stop is preferably provided placed below the hook so
as to prevent it falling; this pin or stop being withdrawn on lowering the boat.
Dated this 7th day of December 1896.
GEO. H. RAYNER,
37, Chancery Lane,, London, Agent for the Applicant.
I, GEORGE VINCENT PIPER of Fowey, Cornwall, Master Mariner, 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 connection with the lowering of boats
and has for its object to provide a simple means by which the tackle can be released
automatically from the boats when the latter touch the water.
In carrying out my invention I propose to employ a link or ring passing through
the thwart of the boat and extending vertically, the lowering tackle being connected
to this ring or link. This link is attached to the pulley block or tackle and engages
with a hook under the thwart as hereinafter described and must be entirely
withdrawn to disengage the boat..

page_text: To connect the boat to this link a strong pivoted hook is employed, the end of
which passes through the link engaging with it and fixing it to the boat. This hook
is arranged so that when released it will fall by its own weight, but the weight of
the boat will keep it engaged with the link.
When the boat reaches the water and is supported by it, the link or ring is
loosened an the hook consequently drops disconnecting the boat from the tackle.
To prevent the hook accidentally dropping while the boat is in the davits, owing
to any sudden blow, a pin or stop is preferably provided so as to prevent the hook
falling, this pin or stop being withdrawn on lowering the boat.
In order that the invention may be more clearly understood, reference is had to
the accompanying sheet of drawings, in which Fig. 1 is a side view of the apparatus
showing it applied to the boat the latter being in section, Fig. 2 is a section of the
apparatus, Fig. 3 is a view at right angles, and Fig. 4 is a plan of a boat showing
the holes in the thwart.
A is the pulley block over which the suspending ropes pass in the ordinary
manner, to the lower end of which a bar or link a is fitted formed with the hole a₁.
This bar passes through the thwart B and into the case C bolted or screwed to the
under side of the thwart. Within this case is fitted the weighted book D, one side
of which is formed of considerable size so as to drop down when released into the
position shown in dotted lines. The link a engages with the upper portion of this
hook as shown in Fig. 2, and when engaged prevents it dropping down. The hook
is pivoted at d immediately below the bar when the later is in locking position.
The case C is provided with the slot c through which the pin on the hook passes.
This slot and pin limit the motion of the hook and also allow it to be raised to
engage with the link or bar a. The case is also provided with the small hole c¹ and
the hook is furnished with a corresponding hole d' allowing the pin E to be passed
through and to secure the hook in locking position in order to prevent any danger
of the boat becoming detached when in the davits. The case is provided with the
fixed arm or bar F, which is forked so as to pass on each side of the case, and is
provided with an eye f at its lower end which is attached to the keel so that the
latter may assist in carrying the weight of the boat when suspended in the davits.
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) An improved device for use with lowering boats, consisting of a slotted bar
or link attached to the pulley block and passing through the thwart or seat, a hook
carried in a suitable case below the pulley engaging with the link or bar and releasing
automatically on the boat reaching the water, and means for operating the said hook,
substantially as described and for the purposes specified.
(2) An improved boat lowering tackle, consisting of a slotted bar or link fitted
to the pulley block and passing through the thwart or seat, a case fitted below the
thwart, a weighted hook within the said case engaging with the link or bar, a slot
in the case, a pin on the hook passing through the said slot and allowing it to be
operated, and a stop or pin securing the hook in locked position, substantially as and
for the purposes specified.
(3) The improved boat lowering tackle having a link attached to the pulley block
and automatically releasing it on the boat reaching the water, all constructed and
operating as described and shown in the accompanying drawings, and for the
purposes specified.
Dated this 19th day of August. 1897.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.