IMPROVED APPARATUS FOR OPERATING BOATS ON SHIPBOARD.”
Year: 1873

page_text: LETTERS PATENT to George Washington Mallory, of Mystic Bridge,
County of New London, State of Connecticut, in the United States
of America, for the Invention of "IMPROVED APPARATUS FOR OPERATING
BOATS ON SHIPBOARD.”
PROVISIONAL SPECIFICATION left by the said George Washington
Mallory at the Office of the Commissioners of Patents, with his
Petition, on the 7th May 1873.
I, GEORGE WASHINGTON MALLORY, of Mystic Bridge, County of
New London, State of Connecticut, in the United States of America,
do hereby declare the nature of the said Invention for "IMPROVED
APPARATUS FOR OPERATING BOATS ON SHIPBOARD," to be as follows:-
One portion of the Invention relates to modifications in the means
of operating davits so as to more effectually and conveniently take in
and put out a boat. It is adapted for being successfully operated in a
panic, or by inexperienced and unskilful persons.

page_text: One important feature consists in branching the bottom or hinge
of a hinged davit, in connection with suitable operating means, so as
to afford a wide bearing and hold the davit firmly in its proper position
relatively to the ship and boat.
Another consists in the employment of a single guide bar fixed in a
proper position on one side of a hinged davit, in combination with
means for connecting the davit to the guide bar by a piece taking hold
of each. As the guide bar is liable to be a little misplaced the con-
necting piece should be allowed to slip or play a little upon the davit.
The guide bar may be straight, but it is preferably curved to correspond
to the motion of the adjacent part of the davit. The connecting piece
may take hold of the guide bar by partially or entirely embracing it,
or it may be provided with a T head working in a corresponding groove
in the guide bar.
Another consists in provisions for operating the hinged davit by a
screw. I mount the screw in a bearing at or near the bulwarks, so that
it is incapable of traversing, but may swing or change its angular
position vertically, and employ a nut mounted on trunnions in the
davit, the screw being provided with a suitable hand wheel, or other
means of operating. The turning of the screw moves the davits with
the dependent boat inboard or outboard at will.
I propose as an important modification of the above, operating by
an endless chain with a pulley at each end of its path, and gearing or
other suitable mechanism for operating the chain. The chain is thus
made the means for moving the davit inboard or outboard at will, in
place of a screw.
Another modification may be to employ a small gear wheel mounted
in bearings in each davit with a crank, or the like for turning it, and
gearing into a curved rack or segment on the guide bar or other bar
adjacent to the path of the davit.
Another feature consists in the employment of a safety pawl con-
nected to the davit, and acting in a ratchet on a guide bar or other bar
alongside. This pawl is very useful in heavy weather to prevent any
backward movement in consequence of the rolling of the vessel, and the
swinging of a heavy boat.
The pawl may be made ineffective by a simple adjustment. It may
be made to act in both directions, but its most important use is in the
movement of the davits outboard in preparing to lower the boat.

page_text: Another portion of the Invention relates to the means for hoisting
and lowering the boat. This may be used in connection with the above
novel provisions for operating the davits, or it may be used with any
other suitable means for effecting the other parts of the work.
I provide a suitable windlass with a rope or chain extending there-
from around a sheave at the base of each davit, and thence guided by
other sheaves leads to the supporting sheave at the head of the davit
from which latter sheave the boat depends. The rope may run directly
without the intervention of any multiplying sheaves or blocks.
I propose to lower the boat rapidly by a quick thread screw, and to
employ in connection therewith the mechanism known as gypsey gear,
or gypsey windlass, to aid in hoisting the boat. The gypsey gear assists
or takes the place of the screw in hoisting the boat. It acts by the aid
of a lever or of several levers, each provided with one or more pawls,
and the windlass is worked by the motion of the lever in one direction.
Another modification of this part of the apparatus may be to provide
suitable gearing worked by a crank or otherwise on the stanchion which
supports the inner end of the guide bar, or the gearing may be mounted
on any other fixed part, or even on the hinged davit itself, with a small
windlass, which as the gearing is worked winds in the rope or chain.
In such case the rope leads, as before, first to a sheave at or near the
hinge or axis of motion of the davit, and thence leads up and is rove
through the supporting sheave.
I propose to employ an ordinary strap break worked by a lever in
connection with this modification, or with any other part of the
mechanism to restrain the motion. In lowering the boat the lever
which controls the brake may be held in the hand of a person remaining
in the ship, or a cord may be attached to the lever and held in the
hands of a person in the boat.
I esteem it important, especially in some of the modifications that the
gearing shall be connected so that the mechanism of both davits shall
be worked together.
Another portion of the Invention relates to provisions for casily and
certainly detaching the boat at the desired moment, and setting both
ends free at once. For this purpose I construct the boat with a board
or plank extending lengthwise upon the thwarts along the centre from
one point of attachment to the other. Hooks capable of being opened

page_text: to liberate the boat are provided at each point, and the lowering ropes
are securely held thereby. To liberate the boat at the right moment
a sliding bar is mounted extending lengthwise immediately under the
protecting plank before described, and a lever is provided by which it
can be rapidly moved endwise at the desired moment. Each end of the
bar carries an iron with two inclined grooves which control the halves
of their respective hooks. The movement of the bar endwise causes
these grooves to act on the hooks opening the hook at each end of the
boat simultaneously and with absolute certainty.
'In any weather, however violent may be the motion of the ship,
women and children may be placed in the boats while inboard and on
the chocks. Afterwards, the chocks being suitably removed, the screws
or other provisions may be operated, and the davits with the boat
depending therefrom may be moved rapidly and surely outboard until
the boat hangs properly over the side of the ship. Then the lowering
devices being put in operation, either by the means operated by a man
on the ship, or by the brake controlled by a man in the boat, the boat
descends.
The disengaging of a boat in heavy weather, and while a vessel is in
rapid motion, must always be a critical period, and one which calls for
activity and discretion. My Invention greatly reduces the danger.
When the boat strikes the water, the man having control in the boat
moves the longitudinal bar and liberates both ends instantaneously.
SPECIFICATION filed in pursuance of the conditions of the Letters
Patent, and of an Order of the Lord Chancellor, by the said George
Washington Mallory in the Great Seal Patent Office on the 14th
November 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
WASHINGTON MALLORY, of Mystic Bridge, County of New London,
State of Connecticut, in the United States of America, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of May, in the year of our Lord
One thousand eight hundred and seventy-three, in the thirty-sixth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
90

page_text: unto me, the said George Washington Mallory, Her special licence,
that I, the said George Washington Mallory, my executors, adminis-
trators, and assigns, or such others as I, the said George Washington
Mallory, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time, and at all times there-
after during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "APPARATUS FOR OPERATING BOATS ON SHIPBOARD," upon the condition
(amongst others) that I, the said George Washington Mallory, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office on or before the Eighteenth day of November
1873.
NOW KNOW YE, that I, the said George Washington Mallory,
do hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, that is to say :-
Certain features of the Invention relate to modifications in the means
of operating davits so as to more effectually and conveniently take in
and put out a boat.
Other features relate to means for hoisting and lowering the boat.
These may be used in connection with the above-mentioned provisions
for operating the davits, or may be used with any other means for
effecting the other parts of the work.
Other features relate to means for liberating the boat when lowered.
The improvements are adapted for being successfully operated in a
panic, or by inexperienced and unskilful persons.
One important feature consists in branching the bottom of a curved
and rigid hinged davit, and mounting it a little inboard on the deck, so
as to afford a wide bearing and hold the davit firmly in its proper
position relatively to the ship and boat.
Another consists in a double windlass with two ropes or chains
extending therefrom, each passing around a sheave at the base of a davit,
and thence guided by other sheaves if necessary leading to the

page_text: supporting sheave at the head of the davit, from which latter the boat
depends. The ropes may run directly without the intervention of any
multiplying sheaves or blocks.
Another consists in provisions for lowering the boat rapidly by means
of a quick threaded screw, and to employ in connection therewith the
mechanism known as gypsey gear or gypsey windlass to aid in hoisting
the boat. The gypsey gear acts by the aid of a lever provided with
one or more pawls, and the windlass is worked by the motion of the
lever in one direction. The gypsey is set free by removing its operating
lever.
Another consists in provisions for operating each hinged davit by a
screw, I mount the screw in a bearing at or near the bulwarks so that
it is incapable of traversing, but may swing or change its angular
position vertically, and employ a nut mounted on trunnions in the davit,
the screw being provided with a suitable hand wheel or other means of
operating. The turning of the screw moves the davits with the de-
pendent boat inboard or outboard at will.
Another feature consists in a modification of the provisions for raising
the boat. I provide suitable gearing worked by a crank or other suitable
means mounted on the hinged davit itself, with a windlass, which as
the gearing is worked winds in the rope or chain.
Another feature consists in provisions for employing an ordinary strap
brake worked by a lever in connection with this modification, or with
any other part of the mechanism, to restrain the motion in lowering the
boat. The levers which control the brakes on the respective windlasses
may be held in the hand of a person in the boat or of one remaining on
the ship, as may be most convenient.
Another feature consists in provisions for supporting the feet of the
davits on changeable bearings in a manner analogous to that described
in my Patent dated March 19th, 1872, but without any cavities in which
water may be retained or ice or snow accumulate.
A web of metal projects upward from a suitable support on the deck,
and is recessed to receive cross pins which are fixed in a slot in the
foot of each davit, and as the davit is inclined outboard or inboard the
bearing shifts from one of these cross pins to another.
Another feature which I propose as an important modification of the
operating means provides for moving the davits by an endless chain with

page_text: a pulley or wheel at each end of its path, and suitable mechanism for
operating the chain. The chain is thus made the means for moving
the davit inboard or outboard at will in place of a screw.
Another feature consists in the employment of a safety pawl con-
nected to the davit and acting in a ratchet on a guide bar or other bar
alongside. This pawl is very useful in heavy weather to prevent any
backward movement in consequence of the rolling of the vessel and the
swinging of a heavy boat.
The pawls may be made ineffective by a simple adjustment. It may
be made to act in both directions, but its most important use is in the
movement of the davits outboard in preparing to lower the boat.
Another feature consists in providing a moveable pinion arranged
to be operated by a crank, with provisions for shifting its position end-
wise, and holding and operating it at either extreme of its motion.
In the one position it operates the davits outboard and inboard at will,
and in the other position it raises or lowers the boat.
Another and final feature of my Invention consists in mechanism for
detaching instantaneously and with absolute certainty. With ordinary
mechanism much difficulty is experienced in connection with operating
boats on shipboard in consequence of the inability to certainly and
safely dotach the boats from its hoisting and supporting means both
ends at the same time. I provide simple mechanism in the boat which
may be operated by one hand of the boat steerer or other competent
person. The moment the boat is sufficiently lowered it is by a pull
of the hand set free both ends at once.
The following is a description of what I consider the best means of
carrying out the several parts or features.
Figure 1 is an end view, and Figure 2 is a side view of apparatus
which shows the first four features of the Invention. The view in
Figure 2 is from the outside of the vessel, the planks of the bulwarks
being represented as removed to show the mechanism.
In these Figures A is the hull of the vessel. A¹ are rigid frames
extending inboard from the bulwarks and supporting the boat upon
chocks, the outboard half of each of which is hinged to turn down at
pleasure and allow the boat to be swung outboard so soon as it is lifted
a little by the ropes e, e. D, D, are davits curved as represented, and

page_text: equipped with the proper tackles E, by means of which the boat is
hoisted and lowered, the ropes being both operated by one windlass as
will presently appear. The bottom of each davit is forked and the
branches are widely spread apart as shewn by D¹. The feet of these
branches are hinged in stout eyes C, which form axes on which the
davits may be turned in being moved outboard and inboard. Each
rope e is led through an eye or pulley d, on the davit, and through
another eye or pulley a, on the deck, the latter being very near
the axis of motion of the corresponding davit, so that the moving
of the boat outward or inward does not materially raise or lower
the boat. The hoisting and lowering are effected by turning windlasses
B, B, so as to wind up or unwind the ropes e, e. To raise the boat the
gypsey K is reciprocated powerfully by acting on the lever R. In this
gypsey K a pawl acts on the teeth of a ratchet wheel K¹ fixed on the
shaft B¹; I prefer that the pawl shall be equipped with a spring to urge
it into contact with the teeth, and that it be mounted on the under side
of the gypsey, so that in operating the lever R by hand the up motion
is easy and the down motion is effective in lifting the boat. G is an
endless screw provided with a hand wheel or other suitable means for
operating conveniently, and working in the periphery of a wheel N, 1
which is keyed fast on the shaft B'. The threads of the screw G, and the
corresponding teeth or half threads on the wheel N are made so oblique
as to form what is sometimes called a quick screw, and being smoothly
finished and properly lubricated the weight of the boat is nearly sufficient
to cause the screw G to turn of itself when caused to depend on the
ropes e.
A little assistance from a man or boy will cause the screw G
to turn rapidly, and the boat to be gently and steadily lowered into the
water, or when the davits D, D, are properly inclined inward to be
lowered into the chocks. In hoisting the boat the quick screw G is
able to hold with one man or boy in attendance all that the gypsey a
turns the shaft. During the idle up motion of the lever R. the pawl of
the gypsey K. slides over the teeth of the ratchet wheel K³, and the
shaft B¹ is held against turning backwards by means of the screw G.
On the depression of the gypsey lever R the shaft B' is turned, and the
ropes e, e, are taken up upon the windlasses B, B, the screw G being
actively turned during this movement by the attendant so as to hold all
it gets. It may be necessary when the windlass shaft B¹ is long and
slender to provide a stanchion on one side or on each side of the gypsey K
close to the same, in addition to the end supports. I propose to move the

page_text: davits D, D, outboard and inboard with the boat properly suspended
thereto by turning the endless screws H, H, which are threaded through
nuts of brass or other suitable material hung in trunnions between the
branches of the davits. The outboard end of each screw is fitted in a
bearing with proper liberty to change its inclination a little to accommodate
the varying inclinations of the screws as the davits are moved out and in.
I can connect the two screws H, H, by a cross shaft with suitable
gearing so as to compel both to operate uniformly if desired. My
experiments however induce a belief that an advantage will result from
allowing the davits to be moved independently. Thus arranged a weaker
man or a smaller number of men can get a boat outboard or inboard by
moving one end at a time. On removing the lever R the gypsey
revolves idly with the shaft B². There may if preferred be provisions
by an eccentric box or otherwise for lifting the endless screw G out of
its engagement with the wheel N during the hoisting motion of the boat.
In such case the wheel N, or some other suitable toothed wheel should
be provided with one or more pawls mounted on fixed centres. The
branched form of the davits D, D', gives each a wide base, so that the
davit is efficiently guided without any necessity for addition of guides or
braces. This breadth of base fore and aft is important, especially in case
of a pitching motion of the vessel. The broad base may be obtained by
a T shape of the davits at their feet, but I prefer the forked form as
represented.
Figures 3 and 4 show a modification in which the hoisting and
lowering machinery is carried on the davits. In this form of the
Invention the rope which depends from one davit will usually be
operated independently of the rope which depends from the other
davit, one or more attendants being stationed at each davit to operate
them, but it is practicable to operate them together by a shaft extending
across from one to the other.
Figure 3 is a cross section of a portion of the vessel and a corre-
sponding view of the boat and operating mechanism.
Figure 4 is a side elevation of a portion of the vessel with a corre-
sponding view of one of the davits and the attached mechanism. In
5 this Figure the davit is represented as cut off near the highest point
of the curve. The position of the parts retained corresponds to that
represented in Figure 3. These Figures show the fifth and sixth
features.

page_text: The davit has been moved outboard nearly to its extreme outer
position. The mode of operating it outward and inward is by a screw
and hand wheel, the same as in Figures 1 and 2, but the mode of
raising and lowering the boat is different.
: Gearing provided with a crank is mounted on each davit, so that the 5
power of a man or any number of men on the vessel being applied to
the crank can raise the boat. A strap brake embraces a wheel on the
shaft of the windlass and is controlled by a cord which may be operated
by a man on the boat so as to control the lowering. It will be under-
stood that the cords controlling the lowering of the respective ends of 1
the boat may be both operated by the same man.
The operator may
be on the ship instead of on the boat if preferred.
In these Figures 3 and 4, K is the crank, and k a pinion operated
thereby, while K¹ is a larger gear wheel on the windlass shaft. I is
the brake lever controlling the strap brake i. J is the operating cord, 1
and L. is a pawl which may be brought into use whenever desired to
hold the windlass in the required position. The pawl is represented
as engaged so that the boat will remain suspended with the brake
cord J slack. When the boat is to be raised or lowered the pawl may
be held out of the way by any suitable means. It will of course be 20
practicable to lower the boat by turning the crank K, but it will usually
be expedient to liberate the crank and allow the descent of the boat to
be controlled and arrested at will by the simple force of the brakes.
Figures 5 and 6 represent another modification, Figure 5 being a cross
section of a portion of the vessel and a corresponding view of the boat 25
and operating mechanism, and Figure 6 is an elevation of the mechanism,
as seen from the inboard side. These show features 7 to 10 inclusive.
In these Figures the davits and the boat supported thereon are
represented near the middle position, but rather nearer the inboard than
the outboard extreme of the motion. The support at the foot is not a 30
plain hinge but is adapted to shift its bearing from one point to another
as the davit is inclined outward or inward. The davits and the boat
supported thereon arc caused to move by means of chains running
around wheels with suitable operating means. The hoisting of the boat
is effected by gearing operated by a crank, the parts being supported 35
on the fixed work instead of on the davit. The lowering of the boat
may be effected by the crank or by the brake. K is the crank, and k¹

page_text: the pinion which in one position acts on the gear wheel K' to turn the
windlass shaft B¹ and wind in the rope to hoist the boat. I is the
brake lever, and J the operating cord which may, as before described,
be held either in the boat or on the vessel. L is a pawl which is made
available when required to hold the gear wheel K₁. The chain G runs
upon wheels "g', 9³, and is secured at one point in an eye on the davits
as représented. The wheel g¹ should be made with indentations and
projections after the fashion sometimes called a sprocket wheel so as to
take a firm hold of the chain G and prevent its slipping. G' is a gear
wheel keyed on the shaft g which carries the sprocket wheel g'. This
wheel G' is adapted to gear with and receive motion from the pinion k¹
but not at the same time that the said pinion is engaged in raising or
lowering the boat. The crank shaft k is capable of being shifted
endwise and held by a dog P. When shifted to one extreme of its
endwise motion it meshes into the gear wheel K³, and the turning of
the crank in this condition of the parts raises or lowers the boat. When
the crank shaft is shifted endwise the pinion ¹ detaches itself from the
gear wheel K', and on being moved further in the same direction to
the other extreme of its endwise motion it meshes into the gear
wheel G¹. In this condition of the parts the turning of the crank K
operates the chain G and moves the davit with the depending boat
outboard or inboard.
There may usually be assumed to be an ample force of men at hand
when the boat is hoisted and taken inboard upon the chocks, but in
case of disaster requiring the sudden lowering of the boat there is liable
to be great confusion and it is important to provide for the operating of
the boat by the smallest number of men possible.
I have provided a rack a¹ on the side of the slotted guide bar or
frame A¹ which guides the davit. When in consequence of the rolling
of the vessel or other cause the davit with its supported load tends to
move inboard it is restrained by the pawl F engaging in the rack a¹,
and on the next roll of the vessel in the opposite direction the attendant
can readily move it further until it reaches its extreme outboard
position where it will be held by the pawl as long as may be desired.
I provide holes in the guide bar and a pin or pins which may be
inserted at will to stand transversely across the slot in the guide bar
to hold the davit in any required position either in connection with the
pawl or independently.

page_text: The foot of each davit is peculiarly formed, and as before observed
supports the weight on different points at different times. The
supporting plate or casting is bolted upon the deck with an upright
web O, standing in a slot in the foot of the davit, as plainly shown in
Figure 6. The slot in the foot of the davit is traversed transversely by
three pins d', ď³, ď³. The middle pin d³ is removable and stands in a
vertical slot in the web O. The other two are received alternately in
corresponding deep notches in the web O, according as the davit is
inclined to its outboard or inboard position.
I have shown in my Patent, dated March 19th, 1872, a plan in which
the davit will roll or rock in the manner of a rocking chair in a trough-
like support.
The present arrangement is preferable on account of
being less liable to be clogged by snow or ice. When the davit is in
its extreme inboard position it rests on the pin d³. As it moves
outboard it bears for an instant on both that and the pin d³, and being 1
moved further outward it bears for a time solely on the pin ď³ and
ultimately bears alone on the pin d³.
The provisions for easily and certainly detaching the boat at the desired
moment and setting both ends free at once are very important. For
this purpose I construct the boat with a board or plank extending
lengthwise across the thwarts along the centre from the bow to the
stern of the boat. Eyes capable of being opened to liberate the boat are
provided near each end and the lowering ropes are securely held thereby.
To liberate the boat at the right moment a sliding bar is mounted
entending lengthwise immediately under the protecting plank before 2
described, and a lever is provided by which it can be rapidly moved
endwise at the desired moment. Each end of the bar carries an iron
with two inclined grooves which control the halves of their respective
open eyes. The movement of the bar endwise causes these grooves to
act on the eyes, opening them at each end of the boat simultaneously 3
and with absolute certainty.
In any weather, however violent may be the motion of the ship, women
and children may be placed in the boats while inboard, and on the
chocks. Afterwards the chocks being suitably removed the screws or
other mechanism may be operated and the davits with the boat depending 3
therefrom may be moved rapidly and surely outboard until the boat
hangs properly over the side of the ship. Then the lowering devices
being put in operation, when the proper moment arrives the man

page_text: having control moves the longitudinal bar and
simultaneously.
Пperates
DOM CHUN
.
The disengaging of a boat in heavy weather and while a vessel is in
rapid motion must always be a critical period and one which calls for
activity and discretion. My Invention greatly reduces the danger.

page_text: nections are moved forcibly aft, causing the inclines d³ to act on the
interiors of the respective eyes, and thus rapidly and simultaneously open
them, liberating the tackle hook and allowing the boat to drop. A closed
cye instead of a hook may be used on the tackle or rope at each end of
the boat to engage with the open eye if desired. I prefer in practice to
finish both faces or ends of the parts E¹, E², so that they are joggled into
each other a little, to prevent fore and aft misplacement relatively to
each other. I also prefer that there shall be fixed guards each side just
forward and aft of each part of the eye, to avoid the possible clinging of
the tackle hook upon either half of the eye, and thus holding the boat
suspended when the eye is open. I have represented such parts, marked
A³, in dotted lines in Figures 10 and 11. One or more rollers may be
introduced to reduce the friction due to the play of the lever B, through
the slot in the casting D¹. The rod D, may be made in several pieces
coupled together in any suitable manner.
Having now described the nature of my Invention, and the manner in
which the same is to be performed, I claim as my Invention,―
Referring to Figures 1 and 2,-
1st. The wide based hinged davits D, D¹, and widely separated eyes
or bearings C, arranged inboard on the deck as shown, whereby the davits
are made self-guiding, and the boat is brought inboard upon the chocks
by a direct movement, as herein set forth.
2nd. The arrangement of the quick screw G and connecting gears so
as to be operated on the ship in combination with the windlass B,
ropes e, and davits for the purposes herein specified.
3rd. In combination with the double windlass B, davits D, D¹, and
ropes e, the gypsey K, provided with a removable lever R, so that it
may be thrown out of use at will, as herein specified.
4th. In combination with the forked or widely hinged davits D, D¹,
the davit operating screws H, H, traversing through suitable threaded a
nuts connected to the self-guided davits, the whole operating together
substantially as herein specified.
Referring to Figures 3 and 4,-
5th. The mechanism for hoisting and lowering the boat, in combination
with davits inclining outboard and inboard, as required, when the 3
mechanism is mounted an the

page_text: 6th. In combination with hinged davits adapted to incline outward
and inward the brake strap i, lever I, and rope J, arranged to control the
delivery of the supporting rope from the windlass as and for the purposes
herein specified.
Referring to Figures 5 and 6,-
7th. The shifting centres d², d², d³, arranged at the base of the davit D,
in combination with the supporting web O, being recessed to receive
the supporting pins, substantially as herein specified.
8th. The chain G and wheels 9, 9², with suitable operating means
arranged to serve relatively to davits D, adapted to be inclined outboard
or inboard, as herein specified.
9th. The pawl F and rack a¹ in combination with davits D, inclining
outboard and inboard, as herein specified.
10th. The changeable pinion and crank K in combination with
the hoisting wheel K¹ and davit operating wheel G', as herein specified.
Referring to Figures 7, 8, 9, 10, and 11,—
11th. The open eyes E¹, E³, and operating inclines d³, d³, in combination
with the operating rod D, and adapted to open simultaneously at each
end of the boat by a single motion of the lever B.
In witness whereof, I, the said George Washington Mallory, have
hereunto set my hand and seal, this Fourteenth day of October,
in the year of our Lord One thousand eight hundred and
seventy-three.
5 Witness,
THOMAS D. STETSON,
Patent Solicitor,
New York, U.S.A.,
GEO. W. MALLORY. (L.S.)