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Патент USA US3030915

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April 24, 1962
Filed- Nov. 26, 1957
4 Sheets-Sheet 1
April 24, 1962
Filed NOV. 26, 1957
4 Sheets-Sheet 2
BMW M6! 14W
April 24, 1962
Filed NOV. 26, 195'?
4 Sheets-Sheet 3
Aprll 24, 1962
Filed NOV. 26, 1957
4 Sheets-Sheet 4
vwm9 mm
F a.
.IV 0
E .R
United States ate
Patented Apr. 24, 1962
alternative lifting buoys or pontoons which may be em
John J. Metzger, 5198. 2nd St., Lindenhurst, N .Y.
ployed in the lifting process being shown in phantom
lines, the illustration of the surface elements of the rig
being simpli?ed;
Filed Nov. 26, 1957, Ser. No. 699,001
24 Claims. (Cl. 114-—55)
FIG. 4 is a view in side elevation with the ship lifted
to lie on the surface of the water and with the hole in
This invention relates to a method of and an apparatus
the hull of the ship temporarily patched;
for salvaging large heavy objects such as ships lying
FIG. 5 is a view in side elevation of a preferred form
below the water. The invention is particularly useful
of drawline and/ or lifting cable or chain-laying appara
in, although it is not restricted to, the salvaging of large 10 tus, such apparatus including a trench-forming tool;
ships sunk in deep water at a depth beyond that at which
FIG. 6 is a view in transverse section through the
divers may normally work for an extended period.
cable-laying apparatus of ‘FIG. 5, the section being taken
The invention has among its objects the provision of
generally along the line 6-6 of FIG. 5;
a novel method of salvaging objects sunk in the water.
FIG. 7 is an enlarged fragmentary view in longitudi
Another object of the invention lies in the provision
nal axial section through the cable-laying apparatus, the
of a novel rig for water salvaging operations.
view being taken adjacent the transverse central portion
Yet another object of the invention resides in the pro
of the apparatus;
vision of a novel method of and an apparatus for salvag
FIG. 8 is an enlarged view in transverse section
ing sunken objects substantially without or totally with
through ‘one of the drawline storing and dispensing guide
out the use of divers.
20 means disposed along the length of the trench~forming
Still another object is the provision of a salvage rig
tool in the apparatus of FIGS. 5, 6, and 7;
for use in water salvaging operations which may be left
FIG. 9 is a view in side elevation of a shoe or runner
without risk of damage and without the loss of any sub
which forms a part of the cable or chain-laying means
stantial amount of work in the event of a storm, and with
of the apparatus of FIGS. 5, 6, and 7;
which the salvage work may immediately be picked up 25 FIG. 10 is a view in side elevation of a lifting device
again when the storm has subsided.
in the form of a pontoon or buoy, a portion of the pon
A further object of the ‘invention resides in the pro
toon intermediate the length thereof being broken away
vision of novel salvaging apparatus which is simple, eco
for economy of space, the wall of the pontoon being
nomical to assemble and operate, and is rugged and
broken through at the water inlet and exhaust port, the
trouble-free in operation.
A further object of the invention resides in the pro
vision of salvaging apparatus wherein the various parts
thereof are under complete control at all stages of the
salvaging operation.
Still another object lies in the provision of salvaging
wall of the pontoon being additionally broken through
at the passage therethrough receiving the lifting means
such as a chain or cable, portions of the lifting chains
and the agitating hoses disposed about the portions. of
the chains below the pontoons being fragmentarily shown;
apparatus which is e?icient in breaking the object to be
FIG. 11 is a fragmentary view in side elevation of a
salvaged ‘free from the mud or silt in which it may lie at
the bottom of the water.
Still another object of the invention lies in the pro
vision of an improved drawline and/or lifting cable or
lifting chain employed in the apparatus shown in FIG.
10, FIG. 11 showing the operating mechanism for the
latching dogs on the chain, the dogs being shown in in
chain laying device.
Yet another object of the invention resides in the pro
vision of an improved trench-forming device, in the
speci?c apparatus shown such trench-forming device
The salvaging method and apparatus of the present in
forming a part of the line or cable laying apparatus.
Other objects of the invention include the provision of
operative position, that is, lying along the length of the
vention are illustrated herein in connection with the rais
ing of a large ocean liner sunk in deep water which,
for purposes of illustration, is assumed to exceed in depth
that at which divers may safely operate ‘for extended
a novel object-lifting device, a novel agitator means as
periods. The present invention, as apparent from above,
sociated with the lifting device for aiding in the breaking
is designed to eliminate or substantially eliminate the use
of the object ‘free from the mud or silt at the bottom of
of divers, thereby markedly decreasing the hazards of
the water, and a novel remotely controllable, adjustable 50 the salvaging operation.
connecting mechanism between object-lifting devices and
Since the salvaging method and apparatus of the
the lifting cables or chains which partially embrace the
invention require no divers, at least after brief explora
object to be lifted.
tions of the object to be salvaged, the site of the salvag
The above and further objects and novel features of
ing operation can be left at almost any time by the sur
the invention will more fully appear ‘from the following 55 face vessels and personnel, ‘after ‘a minimum of opera
tions necessary to secure the parts at the surface, since
description when the same is read in connection with the
there is no problem of returning divers to the surface.
accompanying drawings. It is to be expressly under
Thus the rig may be quickly left, for example, when a
stood, however, that the drawings are for the purpose of
storm of such force arises that it would be inadvisable
illustration only and are not intended as a de?nition of
60 to continue salvaging operations at that time. The sal
the limits of the invention.
vaging rig of the invention is of such character that the
‘In the drawings, wherein like reference characters re
salvaging operations may quickly be resumed upon the
fer to like parts throughout the several views,
return of the surface vessels and personnel to the site.
FIG. 1 is a somewhat schematic view in plan of a
sunken ship to be salvaged, the ?gure showing an inter
mediate position in the assembly of the salvaging rig;
v‘FIG. 2 is a schematic view in perspective of the salvag
ing rig assembly in substantially completed condition,
the distance from the surface of the Water to the ship
being greatly foreshortened for clarity of illustration;
'FIG. 3 is a view in front elevation of the ship in
righted and intermediate lifted position, additional or
At each stage of the salvaging operations, from the initial
65 placement of the main parts thereof to the lifting of the
object to be salvaged, the various parts of the rig are
under complete control at one or more stations at the
surface of the water.
Proceeding now to a consideration of the drawings,
70 there is shown in FIGS. 1 ‘and 2 a large ship such as an
ocean liner designated v10‘, lying on the bottom 11 of the
ocean. The water above the ship is designated 12, and
the surface of the water by the character 14. The partic
ular ship shown is one that has been sunk by an accident
which resulted in the formation of a large hole 15 in a
side thereof. ‘For the purpose of description, it will be
assumed that the bottom 11 lies at a comparatively great
distance, on the order of 200 feet or more, below the sur
lifting members 31 are shown attached to the secondary
bridle members at 32 and 32’. Although for the sake of
simplicity only one lifting member 31 is shown at each
location, and such locations are widely spaced, it will be
apparent from FIG. 2 that a ‘large number of lifting de
vices will be employed. Preferably the means attaching
the lifting devices 31 to the secondary bridles are in the
form of clamps, whereby the lifting devices may be taken
up and re-clamped on the secondary bridles as the ship
face, although it will be appreciated that the method and
apparatus of the invention display great advantages in
salvaging operations conducted at less depths.
In starting the salvaging operation, after the ship has 10 is gradually lifted. It will be understood that a sub
stantial length of each end of lifting device 31 will be
been located, it is convenient to outline the ship by the
left extending beyond the secondary bridle, particularly
series of small locating buoys connected by cables to
on the “high” side of the ship, if the latter lies in tipped
magnetic grappling devices which attach themselves to the
ship. For the purpose of simpli?cation, such locating
In the embodiment shown, the apparatus 24 is sym~
buoys and magnetic grappling devices are not shown in
metrically supplied with ?uid, preferably water, under
the drawings. It will be understood, however, that the
pressure, from both ends thereof. Flexible multiple sup
ply hose devices 25 are connected between the respective
ends of apparatus 24 and two tenders 22, as shown in
two laterally spaced main forward buoys 16 and two aft
buoys 17 ‘are now located at positions somewhat forward 20 FIG. 1. The tenders 22 move with the apparatus 24, so
as to supply dredging ?uid under pressure thereto and
ly of and rearwardly of, repectively, the bow and stern of
ship may be outlined at the surface of the water in other
manners. After the ship has been located and outlined,
the ship. Buoys 16 and 17 may be secured in position by
to serve as stations from which to draw in or deposit the
anchor lines, of which typical ones are indicated at 19.
The respective buoys 16 and 17 are now connected by
drawlines and/or lifting devices beneath the ship 10.
Apparatus 24 may be drawn progressively along and be
buoys 16 and '17 are connected as shown by transverse
attached at one end to terminal members 40 of the tool
primary or longitudinal bridle cables 20, and the pairs of 25 neath the ship 10 by means of draw cables 26 which are
by means of suitable eye members 29 thereon, the draw
cables running over suitable pulley devices 27 on the
and 17 and the bridle cables, as described, may be con
transverse bridle 21’ and being drawn in by suitable
veniently carried out by small surface, tender vessels 22.
The buoys 16, 17 and the longitudinal and transverse 30 winching means on the respective tenders 22. The ten
ders 22 will themselves be propelled as required to travel
bridle cables not only serve to outline the site of the
bridle cables 21 and 21’. The placing of the buoys 16
ship, but also function as the means at the surface of the
water supporting the upper ends of the drawlines and/ or
ship-raising or lifting devices in the assembly of the sal
with apparatus 24. Thus, in the embodiment shown, the
tenders 22, which carry pumping and valve devices (not
shown) to supply multiple hoses 25, move progressively
along the sides of the location of the ship 10, and by
vaging rig.
A cable-laying apparatus or tool 24 is now sunk to the
bottom of the ocean in a location somewhat forwardly
of or rearwardly of, as the case may be, the bow or the
cables 26 to cause apparatus 24 to move longitudinally
includes a tunnel or trench-forming device supplied with
toons 34 are attached to the lifting devices 31.
their winching devices, progressively pull in the draw
beneath ship ‘10.
After the apparatus 24 has made a complete pass be
stern of the ship. In the assembly illustrated in FIG. 1,
the apparatus 24 has been sunk forwardly of the bow of 40 neath the ship 10, and has laid drawlines and/or lifting
devices at spaced intervals in such travel, the apparatus
the vessel. Apparatus 24, which will be described more
24 and its traversing and ?uid supply means may be re
fully in connection with FIGS. 5-9, inclusive, is in the
moved from the site of the salvaging operations. If only
form of a laterally symmetrical broad general V-shaped
drawlines were initially laid beneath the ship, the lifting
conduit which is of such breadth and depth as to em
brace the lower part of the ship to be salvaged while 45 devices, such as cables or chains, are now drawn into
place and are secured at their ends to the surface rig in
having the branches or legs of the apparatus substantial
the manner shown in FIG. 2. Thereupon lifting pon
ly spaced beneath and laterally of the ship. Apparatus 24
In the
?uid, preferably water, under pressure; the trench-forms
arrangement shown, each of the pontoons 34 is adjustably
longitudinally of the ship.
run of lifting devices 31 are removed from their respec
tive secondary bridle, the pontoon is installed on the
ing device is so constructed and arranged as to dredge a 50 secured to a set of three lifting devices 31. In mounting
the particular pontoons shown, the upper ends of one
trench or passage beneath the vessel as the tool is moved
Apparatus 24 is provided
with one or more drawlines and/or lifting cable or chain
lifting cables or chains, the pontoon is lowered along the
laying devices, so that the drawlines and/or lifting devices
may be deposited or drawn in, respectively, beneath the 55 lifting devices to the level desired, and the upper ends
of such runs of the lifting devices are reattached to the
ship and left at positions spaced longitudinally of the ship
secondary bridle. Consequently, such lifting devices re
as the apparatus 24 travels therealong. For the purpose
main available for the attachment of additional lifting
of simplicity of illustration, in FIGS. 1 and 2 of the draw
pontoons or the removal of the pontoons already assem
ing the elongated ?exible means designated 31, which are
shown in FIG. 1 as having been deposited by the ap 60 bled thereon at any time. After a sufficient number of
pontoons 34 have been initially mounted upon the lift
paratus 24, are assumed to be the actual lifting devices
such as chains or cables.
As will appear in connection
with FIGS. 6 and 7, however, the ?exible members de
ing devices 31 at each side of ship 10, the pontoons
are given su?icient buoyancy, by the blowing of a part
of the water therefrom, to start the raising of the ship.
posited beneath the ship initially may be drawlines, the
If the ship has become embedded to a substantial extent
actual lifting devices being subsequently drawn into place 65 in mud or silt on the bottom, the initial freeing of the
around the ship.
ship from the bottom may be facilitated by agitating
The ends of the thus deposited drawlines and/ or lift
means, such as those shown in FIG. 10, disposed about
ing devices 31 are secured to the portion of the salvaging
the lower portion of the lifting devices beneath the ship.
rig which lies at the surface of the water. For this pur 70 The number and location of the pontoons, and the man
pose there are preferably provided two secondary bridle
ner and degree to which they are rendered buoyant dur
members 30 and 30’ which are secured between the
traverse bridles 21, 21’ and lie parallel to longitudinal
ing various stages of the ship-raising operation, depend
upon the attitude and orientation of the ship in its sunken
position, the extent and nature of the damages to the
bridles 20 but inwardly thereof, preferably somewhat
laterally outwardly of the sides of the ship. The ends of 75 hull which caused its sinking, and the manner and the
distance through which the ship is to be towed after being
thereof shown in FIG. 7 is typical of the construct-ion of
the compartments therealong. In the portion of the tool
shown in FIG. 7, there are three subsections 44, 45, and
46, which are joined together in forming the tool. The
joint between sections 44 and 45, which is typical of
the joints, except that at the apex, in the tool, is formed
by partitions 49 on the respective sections, the partitions
In the present instance, by Way of illustration, it will
be assumed that it is desired to tow the raised ship in
upright position and that a large part of the required
buoyancy can be contributed by the hull of the ship after
temporary repairs thereto. It will also be assumed that
the sunken ship lies somewhat on its side, as shown.
Accordingly, initially it is desired to produce more buoy
having outwardly directed ?anges 49", the ?anges being
sealed by gaskets and joining studs 56’, as shown. Apex
ancy in the pontoons on the low side of the ship than on 10 joint 37 may be formed, for example, by welding the
the high side, so as to turn the ship into upright position.
With the salvaging rig of the present invention, such
abutting sections together. The side wall of each of the
tool sections is provided with a plurality of jet-forming
operations can be carried out completely from the surface
ori?ces 50, as shown in FIG. 7. Ori?ces 50 are prefer
ably so disposed as to slant upwardly and outwardly so
Since lifting devices 31 will engage the ship substantial 15 as to displace the mud and silt of the ocean bottom in that
ly without slip, the degree to which the ship has been
direction when ?uid under pressure escapes from such
turned may accurately be gauged by the travel of the
ori?ces. The sections of the tool are divided by trans
of the water.
upper ends of lifting members 31 through the respective
fastening means 32, ‘32' therefor, it being understood that
versely extending partitions there being a partition 59
shown at the apex 37, two generally equally spaced inter
the connections at 32, 32’ are constantly taken up or 20 mediate partitions 56 and 57 in section 44 and a somewhat
similar partition 55 in section 45. Either one or both
of ?anged members '49 also functions as a partition.
let out as the position of the ship changes. After the ship
has been turned into upright position, it may be lifted
from the bottom by blowing the water to various degrees
Each of the thus formed compartments 51, 53, 58, 52,
54, etc., in the tool is fed by its respective conduit extend
pontoons and ship the required buoyancy. During all 25 ing longitudinally of the tool and connected at its outer
these operations, the attitude or orientation of the ship
end to an appropriate one of the hoses 42. The pipes
both laterally and longitudinally is apparent at all times
69, 61, 61’, 62, etc., which serve the various compart
from the length of the various lifting devices and/or
ments of the tool are arranged in the manner more
drawlines extending upwardly from connections 32, 32'
clearly shown in FIG. 6. The central pipe 69, for exam
at the secondary bridles.
30 ple extends through all the transverse partitions and is
It is assumed that the character of the damage to the
welded thereto, terminating at its inner end within the
ship has already been surveyed and that a temporary
sub-compartment ‘54. To aid in the distribution of ?uid
patch, which may be of the pneumatic type, to seal the
from conduit 6%‘ throughout compartment 54-, partition
opening 15 in the hull thereof has been made and is ready.
59 is provided with a generally conical projection 64 con
As the ship nears the surface, the prepared patch, shown
fronting the ori?ce of the conduit.
diagrammatically at 35 in FIG. 4, may be applied and
Others of the pipes extend sequentially through and are
sealed thereto. After this, buoyancy may be given the
sealed as by being welded to the various transverse parti
hull without any other operations, once the upper hatch
tions, each conduit terminating in the particular com
covers of the hull have emerged from the Water, merely
partment which it is to serve. The various hoses 42,
by pumping the Water from the hull. Should it be desired
which are connected to the respective conduits of which
to utilize the added buoyancy of the hull which is poten
those shown at 6tl—62, inclusive, are exemplary, are dis
tially available while it is still an appreciable distance
posed in the ?exible hoses 25, and lead to pumping ap
under water, this can be done, once the hull has been
paratus on the respective tender 22. A separately oper
raised to a level at ‘which divers may normally work for
ated valve, not shown, is associated with each such hose
extended periods, by sealing as by welding the various 45 on such tender, whereby the ‘rate of ?ow of dredging
from the several pont-oons so as to give the assembly of
hatch covers of the hull as well as applying the patch 35
when the ship is still under water at that level.
Turning now to the detailed construction of the cable
?uid, such as water, under pressure to each sub-compart
or a broad U-‘shape, having a depth su?icient to extend
cause the tool to sink and/or bite its way into the ocean
ment of the dredging apparatus may be separately regu
laying apparatus 24, the shape of such tool in side eleva
During operation of the apparatus 2t, its various com
tion is dictated by the shape of the cross section of the 50 partments are supplied With ?uid such as Water in the
object to be raised. Thus, for the operation described,
required amounts. Such ?uid, escaping from ori?ces
the tool is: made generally symmetrical and of a broad V
50, in combination with the Weight of the tool, initially
below the ship 10‘ at its greatest depth, and having a
bottom in a position in alignment with the ship. There
width at its upper end such that the branches or legs of 55 after, the winching devices on the tenders 22 draw the
the apparatus lie spaced from the object at its greatest
tool slowly through the ocean bottom, the tenders keep
width. The apparatus 24 will ordinarily have been as
ing pace with apparatus 24. The amount of tension in
sembled from a plurality of sections after a survey of the
the draw cables 26 required to move apparatus 24- is no
object to be raised. In addition to the above require
more than that well within the capabilities of ordinary
ments, it is ordinarily preferable that the legs of the ‘ap 60 winching apparatus, due to the cutting action exerted upon
paratus be of su?icient length so that their terminal mem
the ocean bottom by the jets issuing from ori?ces 50.
bers 40 lie above the upper level of the bottom :11 upon
The tool 24, which is thus propelled through the ocean
bottom beneath the object to be raised, makes possible
The apparatus ‘24 as shown has two oppositely disposed
the laying or drawing in, at various positions longitu
bottom sections 36 joined at an apex 37, the upper ends 65 dinally of the ship, of drawlines and/ or lifting cables and
of sections 36 having extensions 39 connected thereto.
chains. In the embodiment shown, there are disposed a
The above mentioned terminal ?ttings 40, at the upper
plurality, four shown, of tube-like guide members 66
which are disposed longitudinally along the upper edge of
end of each section 39, house joints (not shown) between
the separate hose members 42 in the multiple ?exible
tool 24 in the manner shown in FIG. 6. In the embodi
ment shown, the ?anges 49' are cut out on the top there
hoses 25 and tubes, to be described, supplying each of
the sections of apparatus 24 with dredging ?uid under
of, at a zone 65, to provide a space within which mem
bers ‘66 are received. The construction of members 66
pressure. The apparatus 24 is preferably subdivided into
and the nature of the bundles or packs of drawlines con
a number of compartments longitudinally thereof, each
tained therein will be more readily appreciated from a
compartment having its separate dredging ?uid supply.
The tool shown is laterally symmetrical. The portion 75 consideration of FIG. 8.
which the object lies.
As there shown, the tube 66 has a longitudinally extend
ing slot 67 in the upper wall thereof, the slot being of a
width but little exceeding the diameter of each of the
drawlines 69 contained within tube 66. The drawlines
87' is so located vertically of the pontoon that when the
water in the pontoon is exhausted to the level of such
port, the pontoon will have a predetermined buoyancy.
_ are preferably initially held in a bundle or pack form,
the pontoon, the latter is preferably provided at the bot
In order to allow the further exhaustion of water from
tom with a similar port and surface-controlled valve
being secured together by a plastic material such wax or
means therefor. Such port and valve means are desig—
tar. Thus the drawlines and their matrix of plastic mate
nated by the same characters as those ?rst described, but
rial may be charged as a whole into the guide 66. The
with an added prime.
pack or bundle of drawlines will have been carefully
The pontoon shown is designed to cooper-ate with three
assembled and oriented in guide 66 so that the draw 10
lifting chains 84. Three longitudinally spaced laterally
lines may be removed from the member 66 through the
central passages receiving the chain are disposed in sealed
slot 67 in a designated succession without any danger of
relation to the interior of the pontoon, the passages being
entangling the drawlines with each other. Thus, after
formed by tubes extending centrally through the pon
the tool 24 has reached a certain location beneath the
ship, assuming that it is desired to deposit a drawline 15 toon. The chains 84, in that portion thereof to which
the pontoons are to be selectively coupled, are provided
thereat, it is necessary only to exert tension upon the op
with selectively remotely operable dog devices 99 which,
posite ends of the drawline next to be withdrawn, so that
the drawline passes radially outwardly through slot 67
and may be drawn upwardly partially to embrace the
ship. Following this the opposite ends of the drawline
are secured to the surface rig, as for example, to second
ary bridles 30, 30'. Conveniently, the drawlines are of
such length as to extend between tenders 22 when such
drawlines are in devices 66, so that all drawline-laying
when in operative position, couple the chain to the pon
toon and, when in inoperative position, allow the chain to
pass freely through the passage through the pontoon.
Each dog device 99 has a latch member 100 which is
connected at a central hole 102 to one end of a long link
1101 of the chain 84. When latch member 100 extends
across the length of the chain, it spans the end of the
25 passage through the pontoon and thus couples the pontoon
operations may be conducted from the tenders.
to the chain. Preferably, although not necessarily, the
The means for drawing in the lifting cables or chains
surface of member 100 which is to contact the pontoon
are somewhat similarly disposed along the bottom of
is provided with a central pilot portion 104 which stably
tool 24. As shown in FIG. 6, there are three tubular
positions it in the end of the passage through the pon
guide members 72 disposed longitudinally of the tool, the
guide members ?tting within aligned pockets 71 provided 30 toon. The end of the next consecutive length of chain is
attached to latch member 160 at a hole 105 which is later
in the ?anges 49' joining sections of the tool. Each of
ally offset from the central hole 102. To one end of the
tubes 72 has a longitudinally extending slot 74 therein,
latch member there is attached a latch-opening cable 106
there being a travelling runner or shoe 75 ?tting within
and to the other end of the latch member there is attached
tube 72. Projecting in a radial plane from body 75 is a
vane-like member 76 which provides a means of attach 35 a latch-closing cable 107. Such cables extend upwardly
longitudinally of the chain to a control station at the
ment of either a lifting chain 84 to be drawn in beneath
respective tender. When the latch member is in its col
the ship or a lifting cable 85 for the same purpose. The
lapsed or inoperative position, it and the cables connected
shoe 75 is provided with conical end portions 79 to
thereto extend freely downwardly through the respective
which are attached eyes 80. Oppositely extending draw
chains 81 are attached to rings 80 and extend along the 40 chain-receiving passages through the pontoon.
The manner of operation of the dog devices will be
tubes 72. Draw chains 81 are of su?icient length so that
readily understood by a comparison of FIGS. 10 and 11,
each has its outer end, provided with a ring 82, extend
in the latter of which the dog devices are shown in opera
ing upwardly beyond the upper end of the respective tube
tive position. It will be apparent, that upon the pulling
72 and to the respective tender 22. Thus the personnel
on the two tender vessels 22 may readily cooperate to 45 of cable 166, each of the latch devices there shown will be
swung to a cross or operative position. The latch devices
draw one of chains 81 while releasing the other, so that
either a draw chain or a draw cable may be pulled into
may be retracted from such operative position by pulling
upon cable 167. The dog devices may selectively be
operated to engage either the top or bottom of the pon
toon, as required.
To aid in the initial freeing of the ship from the mud
or silt in which it may have settled, the portions of lifting
cables 85 which are to lie initially centrally of and be
neath the ship are provided with sheathing in the form of
rings v86 by which it may be manipulated. The pontoon 55 perforated hoses 109 as indicated in FIG. 10. There is
no necessity for such hoses to extend upwardly into the
is provided with a valve port ‘87’ and with a selectively
passages through the pontoons, since the pontoons are
positionable valve member 89 so as to open or close the
not positioned at any time beneath the upper surface of
port. Port 87' is employed both as an inlet and an ex
the bottom upon which the ship rests. The hoses 109
haust for admitting water into or exhausting it ‘from the
pontoon. The valve member 89 is under the control of 60 may be connected to a suitable source of pressure, prefer
ably water pressure, by a supply hose 111 connected
a hydraulic or pneumatic motor 90, and is normally
thereto by a ?tting 110. The hydraulic pressure may be
urged into valve-closed position by a coil tension spring
derived from the same source, that on the tender, that
91. Motor 90 is provided with two ports 92 and 94,
supplies the dredging and cable-laying tool 24. At the
connected to sources of pressure to hoses, not shown,
leading to the tender vessel. When port 92 is subjected 65 beginning of the lifting operation, and simultaneous with
the exertion on the ship of the ?rst large lifting effort by
to pressure and port 94 is opened to the atmosphere the
the pontoons 34, the hoses 109 may be supplied with
valve port 87’ is opened. When valve port 92 is con
?uid, preferably water, under pressure. This has the ten
nected to the exhaust and valve port 94 is connected to
dency to break the vacuum between the ship and the mud
pressure, the port 87 will close. The pontoon is pro
vided with an air inlet pipe 95 connected by a ‘hose 96 70 or silt of the ocean bottom, thereby markedly decreasing
the lifting effort which the pontoons would otherwise
to a source of air under pressure, as for instance to
have to exert in the initial part of the lifting operation.
pumping apparatus on one of the tenders. By proper
Although only a limited number of embodiments of
manipulation of the source of air pressure leading to
the invention have been illustrated in the accompanying
hose 96 and of valve port 87', the pontoon 34 may be
given the desired buoyancy at any time. Preferably port 75 drawings and described in the foregoing speci?cation, it
place beneath the ship 10.
The vessel is assumed in this example to be lifted by
lifting chains 84. The construction of the pontoons 34, of
the chains 84, and of their selectively operable means
for attachment to pontoon 34 will be more readily under
stood upon consideration of FIGS. 10 and 11. The pon
toon 34, as shown, is provided with the usual lashing
is to be expressly understood that various changes, such
as in the relative dimensions of the parts, materials used,
and the like, as well as the suggested manner of use of
the apparatus of the invention, may be made therein
without departing from the spirit and scope of the ‘in
vention as will now be apparent to those skilled in the
tion of the trench to travel longitudinally of the object
upon movement of the tool longitudinally of the object,
and means attached to the tool for depositing elongated
?exible object-embracing means extending from side to
side of the object in the trench beneath the object at
positions spaced longitudinally of the object.
12. A salvage rig as de?ned in claim 11, comprising
means vfor moving the tool longitudinally of the object.
l. The method of salvaging a large heavy object lying
13. A salvage rig as de?ned in claim 11, wherein the
on the bottom of a body of water, comprising forming a 10 trench-forming tool comprises a conduit having a plural
trench in the bottom below the level of the object, the
ity of ori?ces in its sidewall, and means to supply the
trench extending from one side of the object to the other,
interior of the conduit with ?uid under pressure whereby
progressively extending the trench to cause its instanta
to form material-displacing jets at the ori?ces.
neous'position to travel substantially from one end of the
14. A salvage rig as de?ned in claim 13, ‘wherein the
object to the other, and during the formation and ex 15 ori?ces in the wall of the conduit generally on the respec
tension of the trench depositing elongated ?exible object
tive sides of the midpoint of the length of the conduit are
embracing means extending from side to side of the ob
inclined radially outwardly and toward the respective
ject in the trench beneath the object at positions spaced
outer ends of the conduit.
longitudinally of the object.
15. A salvage rig as de?ned in claim 13, wherein the
2. The method as de?ned in claim 1, wherein the trench 20 conduit is provided with a plurality of serially arranged
is formed and extended by a laterally extending bottom
compartments, and comprising means separately to con
cutting tool, and the elongated object-embracing means
trol the ?ow of ?uid under pressure to the compartments.
are deposited in the trench at the location of the cutting
16. A salvage rig as de?ned in claim 15, comprising
a plurality of ?uid supply pipes within the conduit, the
3. The method as de?ned in claim 2, wherein the ob 25 pipes being connected to a source of ?uid pressure at an
ject-embracing means are adapted to lift the object.
outer end of the conduit, the pipes terminating at their
4. The method .as de?ned in claim 2, wherein the ob—
inner ends in the respective compartments which they
ject-embracing means are drawlines, and comprising draw
ing elongated ?exible object-lifting means beneath the
17. A rig for salvaging a large heavy object lying on
What is claimed is:
object by the drawlines.
30 the bottom of a body of water at a depth substantially
5. The method as de?ned in claim 1, wherein the ma
beyond that at which divers may normally work for ex
terial of which the bottom is composed is relatively soft,
tended periods, comprising an elongated, trench-forming
and‘ comprising forming the trench by directing a plu
tool adapted to be introduced into the material of the
rality of streams of ?uid under pressure outwardly against
bottom to lie beneath the object, the tool being adapted
the material of the bottom from an elongated laterally dis 35 to form a trench extending beneath and laterally beyond
posed source of ?uid under pressure, and causing the in
the object and progressively to cause the instantaneous
stantaneous position of the trench to travel longitudinally
position of the trench to travel longitudinally of the ob
of the object by moving the source of ?uid pressure and
ject upon movement of the tool longitudinally of the
the streams of ?uid longitudinally beneath the object.
object, and means for depositing elongated ?exible object
6. The method of salvaging a large heavy object lying 40 embracing means extending from side to side of the ob
on the bottom of a body of water, comprising forming a
‘ject in the trench beneath the object at positions spaced
trench in the bottom below the level of the object, the
longitudinally of the object, the tool having an elongated
trench extending from one side of the object to the other,
casing, and the means for depositing ?exible object
progressively extending the trench to cause its instan
embracing means in the trench comprising an elongated
taneous position to travel substantially from one end of
open-sided guide secured to and extending longitudinally
the object to the other, during the formation and exten 45 of the casing.
sion of the trench depositing elongated ?exible object-em
18. A salvage rig as de?ned in claim 17, wherein the
bracing means extending from side to side of the object
guide has a tube-like body and is located on the top of
in the trench beneath the object at positions spaced lon
the casing, and there is a longitudinally extending narrow
gitudinally of the object, positioning a longitudinally ex
slot in the upper side of the body.
tending bridle line at the surface of the water along each
19. A salvage rig as de?ned in claim 18, comprising
side of the object, and securing the ends of the object
a plurality of relatively thin ?exible drawlines disposed
embracing means to the respective bridle lines.
in parallel relationship in the tube-like body and adapted
7. The method as de?ned in claim 6, comprising posi
for sequential withdrawal therefrom generally radially
tioning the longitudinal bridle lines by buoys anchored to
outwardly through the slot.
the bottom.
20. In an underwater salvage rig, a holder and dis
8. The method as de?ned in claim 7, comprising posi
penser for a plurality of drawlines comprising an elon—
tioning by buoys anchored to the bottom laterally ex
gated tube-like body adapted to be disposed across an ob
tending bridle lines at the surface of the water beyond the
ject to be engaged by one or more drawlines, said body
ends of the object, the longitudinal bridle lines being se
having a longitudinally extending narrow slot in the wall
cured to the lateral bridle lines.
thereof, and a plurality of relatively thin ?exible drawlines
9. The method as de?ned in claim 2, wherein the bot
disposed in parallel relationship in the tube-like body and
tom-cutting tool is moved by cable means attached to the
adapted for sequential withdrawal therefrom generally
ends of the tool.
radially outwardly through the slot.
10. The method as de?ned in claim 9, wherein the 65
21. A drawline holder and dispenser as de?ned in
cable means are guided at the respective sides of the ob
claim 20, comprising an adhesive material for temporarily
ject whereby the tool moves longitudinally of the object.
holding the drawlines together as a group in the body, the
11. A rig for salvaging a large heavy object lying on
the bottom of a body of Water at a depth substantially
beyond that at which divers may normally work for ex
adhesive material yielding to allow the sequential with
drawal of drawlines from the group.
22. A salvage rig as de?ned in clam 17, wherein the
tended periods, comprising an elongated, trench-forming 70 guide is located on the bottom of the casing, the open
tool adapted to be introduced into the material of the bot
side of the guide is located adjacent the bottom thereof,
tom to lie beneath the object, the tool being adapted to
and comprising a shoe-like runner adapted to be pulled
form a trench extending beneath and laterally beyond the
along the guide therewithin, said runner having a ?n
object and progessively to cause the instantaneous posi 75 adapted to project outwardly through‘ the open side of
the guide, the ?n having means adjacent its outer end
for the attachment of an elongated ?exible object-lifting
References Cited in the ?le of this patent
means whereby the last named means may be drawn into
object-embracing position by the runner.
23. A salvage rig as de?ned in claim 17, wherein the 5
casing is in the form of a portion of a loop and is adapted
to pass through the material of the bottom in a path
spaced from the bottom and sides of the object.
24. A salvage rig as de?ned in claim 23, comprising
means at both ends of the tool for supplying it with fluid 10
under pressure, and means at the ends of the tool for
drawing it beneath the object.
Adams ______________ __ Sept. 18, 1877
Midford _____________ __ Dec. 1, 1896
Arbuckle _____________ __ Mar. 3, 1903
Cummings et al. ______ __ Dec. 29, 1903
Serres _______________ __ Aug. 29, 1911
Tognacci ____________ __ Apr. 29, 1919
Dawson _____________ __ Mar. 1, 1921
Jensen et al. _________ __ Feb. 25, 1958
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