Slipping Shackle and Tumbler for Disengaging Boats.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Slipping Shackle and Tumbler for Disengaging Boats.
I, THOMAS HUDSON 58 Toronto Road, Buckland Portsmouth, Hampshire,
Shipwright do hereby declare the nature of this invention to be as follows:-
Fig. 1, Sheet 1, shews general arrangement of gear, details of which are given
on succeeding sheets; B is part of a boat; C is a catch rope, of sufficient length
to ensure required drop of lever 1 to release bat; R is 14 wire rope.
Figs. 5 & 2 Sheet 2, shows the plan & elevation of slipping arrangements: P is
a safety pin; & b are engineer bolts, with split pins.
Figs. 6 & 3 Sheet 3, shows the plan & elevation of tumbler; p is a safety pin
to keep ring in place; p' is a pin to keep thimble of 11 wire rope Rover slip
until gear is to be used; E is hole for thimble of i wire rope R; b is
engineer bolt with split pio.
Fig. 4, Sheet 1, is the other view of lower block of pulley on davits showing
hook H, fitted with spring S to keep gear in hook, during working of boat, in a
heavy sea. Instead of eye in block, a shackle can be used.
All pins to be made as shewn on drawings & to have small catch chains attached
to ensure safe keeping.
The apparatus to be made of maleable steel, excepting all pins & bolts, which
are to be made of mild steel. The bolts b to have split pins as shewn.
Directions for working invention :-
Safety pins p, p' & P to be removed, whilst lever L is held against 14" wire
rope R, by a man, the ring is removed, & the boat can then be dropped at
pleasure, by releasing lever L, which, in turn, releases lever L, & the boat is free.
The advantages of this invention are:-
(1.) That boat can be immediately dropped from any height.
(2.) That gear can be made to fit any pair of davits, by increasing or decreasing.
length of 14 wire rope.
(3.) That no danger arises to occupants of boat, as whole of gear is left hanging
in the davits.
Dated this 27th day of March 1806
THOMAS HUDSON.
DHACKIC ани
I, THOMAS HUDSON of 58 Toronto Road, Buckland, Portsmouth, Hampshire
Shipwright do hereby declare the nature of this invention and in what manuer the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to an improved slipping shackle and tumbler for releasing
boats from the davit hooks and the objects are to perform the operation without

page_text: requiring the aid of more than one person; to prevent injury from the gear; to
enable the gear to be fitted to any pair of davits; and to permit of the boat being
dropped from any height in a heavy sea. These objects are attained by a peculiar
arrangement of parts, of which the following is a description, having reference to
the accompanying drawing which represents a side view of my invention, a few
parts being also shewn in end view.
a are the davit hooks which may be provided with spring catches b to prevent
the unhooking of the gear during rough weather. Suspended from a are the
releasing eyes c which are provided with the open slotted ears d and e.
Between the
open slotted ears d are the notch ended links pivotted on the bolts g: and between
the open slotted ears e are the levers 7 pivotted on the bolts i, and having notched
ends to receive the notched ends of f, the two notched ends being shewn in gear
at j. kare safety pins passing through the open slots of e, and also through h, and
these pins are held to the eyes 1 by the chains m. At the ends of the lever hare
the eyes n carrying the thimbles o of the wire ropes p and p'. At the other end
of the ropes p and pl are the thimbles q and q'. The thimble q is placed over the
"slip "projection ŕ of the lever s of the tumbling arrangement consisting of the
lever and the open slotted link t which is pivotted to s by the bolt u and provided
with the eye v in which is held the thimble 21 of the rope p'. w is a safety pin in
the "slip", and a chain attaching w to the eye y. 2 is a catch rope of sufficient
length to allow the whole arrangement to go out of tension as hereafter described.
z is provided with thimbles A running on the ropes p and p' behind the thimbles q
and . The extreme end of the lever s is formed with a stop B and provided
with a safety pin C held by chain D to the eye E. F is a ring by which the
lever & is held against p and prevented from slipping while C is in place. G is the
upper-part-of-the boat, which is suspended from the links by the chain H. As
sbewn in the drawing, the levers h; the ropes p and 1; and the tumbler t, s, are
all in tensional condition. In order to release the boat, it is necessary to put them
out of this tensional condition, and this is effected in the following manner. All.
the safety pins having been removed from their holes, the person controlling the
dropping of the boat, holds against p by one hand and slips off ring F with
the other hand. On removing the hand from s and p the end of s will fall down
as shewn by the arrow, the thimble q will slip off and simultaneously the ends
of will spring upwards in the direction of the arrows, thus turning on the bolts i,
and removing their notched ends from the notched ends of f, whereupon these
latter will turn on the bolts g and fall into the vertical position shewn by the
dotted lines thus allowing the chain H to slip off and the boat to drop. The catch
ropez prevents the parts right and left of the tumblers t, s from slipping entirely
asunder.
I do not restrict myself to the precise shape, relative proportions or disposition
of parts, as shewn in the drawings, or described in the above specification, as any
or all of them may be considerably varied without departing from the spirit of my
invention.
.
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 ;-
CLAIMS.
1. An apparatus for releasing ships' boats, the said apparatus consisting
essentially of two eyes hanging from the davits, the boat being suspended from
links pivotted to the eyes, each of the said links being held horizontally during the
time that levers, also pivotted to the eyes, are kept in tension by ropes connecting
these levers to a tumbler, on release of which tumbler the whole arrangement goes

page_text: and operating substantially as described in the above specification, and exemplified
in the accompanying drawing.
2. The combination of parts substantially as described in the above specifica-
tion, and exemplified in the accompanying drawings, and together forming an
improved slipping shackle and tumbler for disengaging boats.
Dated this 25th day of September 1896.
HUGHES & YOUNG,
23, Coleman Street, London, E.C., Agents for Applicant..