IMPROVEMENTS IN APPARATUS FOR HOISTING, LOWERING, AND DISENGAGING SHIPS' BOATS." PROVISIONAL SPECIFICATION
Year: 1879

page_text: LETTERS PATENT to James Harrold Barry, of the City of Limerick, Ireland,
and now of 217, Pentonville Road, in the County of Middlesex, Master Mariner,
R.N.R., for the Invention of "IMPROVEMENTS IN APPARATUS FOR HOISTING,
LOWERING, AND DISENGAGING SHIPS' BOATS."
PROVISIONAL SPECIFICATION left by the said James Harrold Barry at the
Office of the Commissioners of Patents on the 22nd January 1879.
"
JAMES HARROLD BARRY, of the City of Limerick, Ireland, and now of No. 217,
Pentonville Road, in the County of Middlesex, Master Mariner, R.N.R. IMPROVE-
MENTS IN APPARATUS FOR HOISTING, LOWERING, AND DISENGAGING SHIPS' BOATS."
The davits are placed a little inside the ship's rail; one of these davits is called
the standard, and the other the moving davits, which are moved out and in on a
pin or hinge about a foot above the rail on the standards, and controlled by a chain
from the top or bottom of these standards, or to the water-ways when necessary.
(The standards, moving davits, and the boats' chocks are made to fit the bottom of
the boats, and nearly the same shape.) To the lower part of these moving davits
is fitted a short arm with a screw to secure the davit at any angle, or when in or
out, and working in a slide. Also attached to the same pin on which works the
davits are chocks with short arms fitted to the shape of the boat's bottom, and to
the lower part is attached a slip hook and ring. The boats' lastings are also fast to
these chocks, so that on releasing the hooks the boats swing to their tackles, and
draw the davits with them. The lowering of the boats is effected by similar
arrangements to those mentioned in Letters Patent granted to me of the 14th
September, No. 3632, of 1878, that is, two sheaves governed by a break between
them, and placed near the centre of the boat, and by natch blocks at each end, the
bight of the falls are taken round these, or a pendant mode of chain at one end
with a ring attached to hook the tackles to, and of rope the remainder, or by the same
species of sheaves attached to the ship's rail inside, and with cog wheel & pinion for
Drine G21

page_text: hoisting. When this is used the detatching gear will be that mentioned in the
aforesaid Patent, or two sheaves, one at each end of the boat connected by a rod
& catch to keep them fixed, and round these are taken two short pieces of chain, the
under links of which are placed on a catch or hook on this sheave, and the other end
is fitted with a ring to hook the boats to. These sheaves are rigid until released,
or will work automatically.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Harrold Barry in the Great Seal Patent Office on the 22nd
July 1879.
JAMES HARROLD BARRY, of the City of Limerick, Ireland, and now of 217,
Pentonville Road, in the County of Middlesex, Master Mariner, R.N.R. "IMPROVE
MENTS IN APPARATUS FOR HOJSTING, LOWERING, AND DISENGAGING SHIPS' BOATS."
This Invention relates to an improved apparatus for hoisting, lowering, and dis-
engaging ships' boats, whereby these operations are performed with far greater
facility than has hitherto been practicable.
The first part of my Invention relates to an improved arrangement of double
davits suitable for heavy boats, illustrated at Figures 1 and 2 of the accompanying
Drawings, Figure 1 being a side elevation, and Figure 2 a front elevation thereof,
when seen from inboard.
Such double davits are placed a little inside the ship's rail. One of such davits a
is rigid, and is called the standard, while the other b moves out and in on a pin or
hinge joint c placed at a convenient height above the ship's rail on the standard a,
and is hereafter called the moving davit. The two standard davits are strengthened
by a horizontal rod or har a¹ secured to the head of each standard. The boat is
suspended to the moving davits b, as seen in Figure 1, and such davits are con-
trolled by chains or wire ropes & affixed to their upper extremities, which chains
pass over the heads of the standards a, and thence down their inner sides through
suitable guides, and are connected to tackles d¹ carried through blocks on the
waterway, by which they are worked. Both the standards and moving davits, as
also the boat's chocks e, are shaped to fit the boat's bottom, so that when she is
hoisted in they form a cradle for her to rest in. The chocks c work upon a hinge
or pin joint e', and are furnished with arms e³, which hold the chocks in position
when the boat is hoisted in. These arms are secured by two slip hooks connected
by a line, upon pulling which the arms are instantly released, and the chocks fall
away, and the boat swings out, drawing the moving davits with it. Projecting
from the base of each of such moving davits is a short curved arm or its equi-
valent b', having a shoulder 6 formed therein, and terminating in an arc b³, which
has a bolt hole b* formed therein. Such arm 61 butts on the ship's rail or other
support in which a suitable socket hole is formed, wherein the are 6 works up

page_text: and down.
When the boat is hoisted out this shoulder b³ comes in contact with
the head of the support f, and arrests the moving davit, and by passing a pin or
cotter 6 through the bolt hole b the arc is secured in position when the boat is
either in or out. Suitable books &³, Figure 2, are attached to the falling chocks, to
which the boat's gripes are fastened, and which are released by the fall of the
chocks. When the boat is hoisted in, the moving davits recede inwards until they
butt against the standards, which prevent them coming in too far.
The second part of my Invention relates to an improved arrangement of single
davits adapted for light boats, and illustrated at Figures 4 and 5, which shew side
and front elevations thereof. In this modification the upper arm of the standard a
is dispensed with, and a dwarf standard m is substituted, which supports the
moving davit b, and upon which it moves in and out, being controlled by a chain
or wire rope d attached to the foot of the davit at n, whence it is carried through a
block n' on the waterway, and worked by tackles. If necessary an additional
support can be placed beneath the dwarf standard when the boat is on her chocks.
Such single davits b have jointed sliding stays p working in slots p' formed in the
curved shoulder of the davit, so that when the boat is out such stay by its own
weight slides down the slot and straightens itself, as indicated by dotted lines in
Figure 4, thus forming a brace. The remaining parts of this arrangement are
similar, or nearly so, to those already described with reference to the first arrange-
ment.
The third part of my Invention relates to an improved arrangement of dis-
engaging gear, worked either by hand or automatically, and illustrated at Figures 3
and 6. Two sheaves are placed one at each end of the boat in suitable bearings,
and are controlled by a rod and lever k', k³, which either retains them in position
or releases them to allow of their revolving, and thus disengaging the two chains /³
placed round them, the end link of each chain being passed over a pin fixed in
each sheave, while the other ends of such chains are fitted with rings k to hook
the boat to. The automatic arrangement before mentioned is as follows:-A clip
hook, of the improved form shewn in Figure 6, is placed at each end, either fastened
to the boat itself or to the chains. Such clip hook has two jaws and ke
hinged at K, the inner jaw being longer than the outer one, and having an orifice
therein to receive the safety pin i, presently mentioned. Each clip hook is fur-
nished with a movable locking arm i hinged or pivotted at I, which when the
hook is locked is secured by a safety pin i attached to a chain fastened to the
hinge joint of the arm or elsewhere, and which pin also passes through the orifice
in the lower end of the inner jaw, and thus securely locks it. In the outer
extremity of such locking arm is an eye, through which a running line k' is fast.
This line passes over a roller k on the inner jaw of the clip hook, and is continued
to the corresponding clip hook, where it is arranged in a similar manner. Such
running line is fitted in its centre with two eyes, which are connected by a slip
link of any convenient form. The automatic operation of this arrangement is as
follows: When the boat touches the water or is lifted by a sea at either end the
running line is slacked up by the motion of the boat, and immediately releases
both the clip hooks and frees the boat.. When desired to detach the boat by hand
it is only necessary to knock away the slip on the link, and thus release the
boat.
Having thus particularly described and ascertained the nature of my said
Invention, and the manner of carrying the same into effect, I would have under-
stood that I claim,―
1°. The improved arrangement of double davits and falling chocks, together with
the mechanism for working and controlling the same, substantially as herein before
described and illustrated.
2°. The improved arrangement of single moving davits with slotted shoulders and
jointed sliding stays and falling chocks, together with the mechanism for working
and controlling the same, substantially as hereinbefore described and illustrated.

page_text: 3°. The improved arrangement of detaching gear capable of acting either auto-
matically or by hand, substantially as hereinbefore described and illustrated.
4°. I also claim as novel the improved form of clip hook, herein before described
and illustrated.
In witness whereof, I, the said James Harrold Barry, have hereunto set my
hand and seal, this Twenty second day of July, in the year of our Lord One
thousand eight hundred and seventy nine.
Witness,
ELT, & Co.,
British and Foreign Patent Office,
33, Southampton Buildings,
Holborn, London.
JAMES H. BARRY. (L.S.)