Improvements in or relating to Means for Raising and Lowering Boats from Ships.
Year: 1899

page_text: Improvements in or relating to Means for Raising and Lowering
Boats from Ships.
I, EUGENE JACQUES BENOIT OGEZ, of Dunkerque, France, do hereby declare the
nature of this invention to be as follows:-
The present invention relates to means for the purpose of rapidly raising and
lowering boats from a vessel in case of collision, wreck or other emergency.
All the component parts of the apparatus have been devised and so arranged
as to allow of their being worked by any person quite unfamiliar with work of a
mechanical nature. The operation of launching is simple, rapid and easily carried
out.
The boat is supported at each end by a cable passing around two blocks. The
upper blocks are suspended on hooks depending from the frames of grooved
pulleys. These grooved pulleys are supported by davit arms which, as will be
explained further on, are arranged to take two positions: either an outwardly
inclined position or an upright position.
The position occupied by the different parts of the davit apparatus when the
boat is placed in its normal position on board the vessel will now be described.
The two arms which are hinged on upright standards are substantially upright
and the pulleys are pressed against the short arms at the upper extremities of the
standards. The boat rests on a cradle or support made of wood or of any other
suitable material. Each of these supports consists of two parts one on either
side of the keel, the inner one fixed, the other hinged or movable. The movable
part can be turned on its hinges, so as not to obstruct the boat when about to be
launched. It will be described subsequently how at the moment required the
When the boat is on board
parts are made to swing out of the way of the boat.
the vessel the two outer parts stand upright, and with the other parts support the
boat. The davit arms are hinged at their outer ends to star rods which, in their
turn, are articulated at their lower ends to sleeves so arranged as to be capable
of sliding up and down the vertical standards.
The two standards being symmetrically arranged only the details and working
of one of them, will be described and what is said of one applies equally to the
other.
A rope is attached to the sleeve, which can, as has been already stated slide up

page_text: and down the standard, the rope passing beneath a roller or guide and having
its free end secured on a winch or drum provided with or without gearing. From
this drum a second rope passes round a guide pulley thence upwards and over
another pulley or guide fixed at the upper end of the other standard, whence it
redescends to the socket of the standard to which its end is secured.
From the movable part of the support on which the keel of the boat rests,
passes a rope the other end of which is provided with a ring which is hooked onto
a hook fixed on a second drum. On the opposite side of the part of the cradle
or support is fastened a second rope which after having passed round a guide
pulley is fixed to the same drum. Supposing the boat to be on board the opera-
tions which it is necessary to carry out in order to get the boat free of its cradle
and launched on the water will be described.
The first operation consists in rotating the second drum. The purpose of this
movement is to put the strain on the cords connected to the hinged parts of the
boat support, in consequence of which the parts will swing round their hinges
and out of the way of the boat. The boat is now free for launching which is
effected by a movement of the davit arms, as will now be described.
After having thus removed the boat supports the other drum is turned. This
rotation will result in winding up the ropes. The sleeves at that time are at the
upper part of the standards, and are therefore drawn down to the base of the
standards, thus drawing the davit arms downward and slightly below the hori-
zontal, so that a simple push by hand against the boat will be sufficient to cause
the rollers from which it is suspended to run down to the outer ends of the davit
arms, the rollers being stopped at the end of the arms by suitable projections.
The person who at the time of launching is in the boat will then lower the boat
by releasing the tackle by which it is suspended.
In order to resist the force of the sea it is important that the davit arms should
always remain at the same distance from each other. For this purpose they are
on the one hand united by a rope or the like, whilst each of them is also secured
to a rope which can slide through a pulley or eye on the gunwale or deck. The
other end of the rope is secured to the sleeve. "Owing to this arrangement the
two davit arms always remain the same distance apart when the arms are swung
outwards.
It should be observed here that to secure a good working of this apparatus the
distance between the ends of the davit arms should be slightly less than that
between the two standards.
The apparatus might be found fault with on account of the great height to
which the davit arms extend when they are drawn up. In order to avoid this
inconvenience I may make use of the arrangement in which cach davit arm
instead of being articulated to the standard is made to slide in a socket or guide
fixed to the upper end of the standard. In the operation of hoisting and replac-
ing the boat on board the vessel, the arms instead of being lifted upwards, may
be lowered by sliding them along the sleeves or guides.
It is evident that instead of moving the davit arms in vertical planes, it is also
possible to turn them horizontally around their standards. In this case the drum
is arranged perpendicularly to its position in the former case, i.e., in line with the
boat. A rope is fastened to one of the sides of the upper part of the davit arm and
is wound round the drum. At the other side of the upper part of the arm another
rope is fastened, passing round a pulley or guide arranged the necessary distance
outside the standard and also wound round the drum. It will be now easily
understood that under such conditions by simply rotating the drum either one
way or the other, the horizontal movement may take place in one or the other
direction around the standard.
Dated this 23rd day of September 1890
:
BOULT, WADE & KILBURN,
Agents for the Applicant.

page_text: Improvements in or relating to Means for Raising and Lowering
Boats from Ships.
I, EUGENE JACQUES BENOIT OGEZ, of Dunkerque, in the Republic of France, 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:-
The present invention relates to means for the purpose of rapidly raising and
lowering boats from a vessel in case of collision, wreck or other emergency.
All the component parts of the apparatus have been devised and so arranged.
as to allow of their being worked by any person quite unfamiliar with work of a
mechanical nature. The operation of launching is simple, rapid and easily carried
out.
In order to render the following description as clear as possible, I have repre-
sented, by way of example, in the accompanying drawings, a boat suspended
from my improved davit apparatus.
Figure 1 is a front view of the apparatus, the boat occupying its normal place
above the vessel..
Figure 2 is a side view, showing the position which the davits take when
launching the boat.
Figure 3. illustrates a modification of the construction represented in Figure 1,
while
Figures 4 and 5 refer to further modifications.
The boat a is supported at each end by a cable passing around two blocks c.
The upper blocks care suspended on hooks d depending from the frames of
grooved pulleys e. These grooved pulleys are supported by davit arms f which,
as will be explained further on, are arranged to take two positions; either an
outwardly inclined position as shown by full lines in Figure 2, or an upright posi-
tion as represented by the dotted lines in the same figure.
The position occupied by the different parts of the davit apparatus when the
boat is placed in its normal position on board the vessel will now be described.
The two arms f which are hinged on upright standards are substantially
upright, as indicated by dotted lines in Figure 2, and the pulleys are pressed
against the short arms at the upper extremities of the standards g. The boat a
rests on a cradle or supports h h made of wood or of any other suitable material.
Each of these supports consists of two parts one on either side of the keel, the
inner one h fixed, the other 2 hinged or movable. The movable part 2 can be
turned on its hinges so as not to obstruct the boat when about to be launched.
It will be described subsequently how at the moment required the parts 2 are
made to turn about their hinges out of the way of the boat. When the boat is
on board the vessel, the two outer parts 2 stand upright, and with the other
parts support the boat. The davit arms f are hinged at their outer ends to
stay rods which, in their turn, are articulated at their lower ends to sleeves k so
arranged as to be capable of sliding up and down the vertical standards g.
The two standards being symmetrically arranged, only the details and working.
of one of them, will be described, and what is said of one applies equally to the
other.
A rope is attached to the sleeve k which can as has been already stated slide
up and down the standard, the rope passing beneath a roller or guide m and
having its free end secured at n on a winch or drum n¹ provided with or without
gearing From this drum n¹ a second rope o passes round a guide pulley o

page_text: thence upwards and over another pulley or guide fixed at the upper end of the
other standard g, whence it re-descends to the sleeve on the standard to which
its end is secured.
From the movable part h² of the support on which the keel of the boat rests,
passes a rope the other end of which is provided with a ring which is hooked
on to a hook fixed on a second drum q. On the opposite side of the part h²
of the cradle or support is fastened a second rope r which, after having passed
round a guide pulley, is fixed at 2 to the same drum. Supposing the boat to
be on board and occupying the position represented by Figure 1, the operations
which it is necessary to carry out in order to get the boat free of its cradle and
launched on the water will be described.
The first operation consists in rotating the second drum q in the direction indi-
cated by the arrow 1. The purpose of this movement is to put a strain on the
cords connected to the hinged parts 2 of the boat support, in the direction indi-
cated by the arrows 2, in consequence of which the parts will swing round their
hinges and out of the way of the boat. The boat is now free for launching which
is effected by a movement of the davit arms f now to be described.
After having thus removed the boat supports 2 the other drum n is turned in
the direction indicated by arrow 3. This rotation will result in winding up the
ropes. The sleeves which are normally at the upper part of the standards are
thereby drawn down to the base of the standards, thus drawing the davit arms f
downward and slightly below the horizontál, so that a simple push by hand
against the boat a will be sufficient to cause the rollers e from which it is sus-
pended to run down to the outer ends of the davit arms, and to cause the boat to
occupy the position a¹ (Figure 2), the rollers e being stopped at the end of the
arms by suitable projections 6. The person who, at the time of launching is
in the boat will then lower the boat by releasing the tackle b by which it is
suspended.
In order to resist the force of the sea it is important that the davit arms f
should always remain at the same distance from each other. For this purpose
they are on the one hand united by a rope 7, or the like, and on the other hand to
a rope 8, 8 8 which is passed through a pulley or eye 9 on the gunwale or deck.
(In the drawing the eyes 9 are shown close to the standards on account of want
of space, but in practice they will be some distance away in the direction indi-
cated by the parts S 8ª of the rope. The end Sb of the rope is secured to the
sleeve k. Owing to this arrangement the two davit arms always remain the
same distance apart when the arms are swung outwards.
It should be observed here that to secure a good working of this apparatus the
distance between the ends of the davit arms f should be slightly less than that
between the two standards g.
The apparatus might be found fault with on account of the great height to
which the davit arms f extend when they are drawn up. In order to avoid this
inconvenience, I may make use of the arrangement represented in Figure 3, in
which each davit arm f, instead of being articulated to the standard is made to
slide in a socket or guide 10 fixed to the upper end of the standard g. In the
operation of hoisting and replacing the boat on board the vessel, the arms f
instead of being lifted upwards, may be lowered by sliding them along their
sleeve or guides 10.
It is evident that instead of moving the davit arms f in vertical planes, it is
also possible to turn them horizontally around their standards g, this latter modi-
fication as regards position is represented by way of example in Figures 4 and 5.
In this case the drum n' is arranged perpendicularly to its position in the former
case i.e. in line with the boat. A rope 11 is fastened to one of the sides of the
upper part of the davit arm f, and is wound round the drum. At the other side
of the upper part of the arm f another rope 12 is fastened, passing round a
pulley or guide 13 arranged the necessary distance outside the standard, and also
wound round the drum. It will be now easily understood that under such con-

page_text: ditions by simply rotating the drum either one way or the other, the horizontal
movement as indicated in Figure 5 in plan may take place in one or the other
direction around the standard.
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
1 claim is:-
1. Ships davit apparatus comprising two vertical standards with extension arms
adapted to extend outward from the ship in a substantially horizontal direction,
grooved pulleys adapted to run on said arms and carrying the tackle supporting
the slung boat, and means for turning the extension arms from a vertical or sub-
stantially vertical position into their outward horizontal position whereby the
pulleys supporting the boat can run outwards along said arms to carry the boat
free of the ship for launching substantially as described.
2. Ships davit apparatus coniprising two vertical standards with extension arms
adapted to extend outwards from the ship in a substantially horizontal direction,
stays hinged to the outer end of the extension arms and to the standards or mov-
able parts thereon pulleys adapted to run on said extension arms and support
the slung boat in combination with drums and cables for turning the extension,
arms into an outward horizontal position whereby the pulleys supporting the boat
can run outwards along said arms to carry the boat free of the ship for launching
substantially as described.
3. Ships davit apparatus of the kind described in combination with a boat sup
port comprising hinged plates as h² and means for releasing said hinged plates
substantially as described.
4. The complete ships davit apparatus substantially as described or illustrated
in Figures 1 and 2 or in Figure 3 or in Figure 4 or in Figure 5 of the accom-
panying drawings.
Dated this 10th love of Luna 1000
BOULT, WADE & KILBURN,
Agents for the Applicant.