US1321562A

US1321562A - Submarine vessel

Info

Publication number: US1321562A
Authority: US
Publication date: 1919-11-11
Anticipated expiration: 1936-11-11

Description

W. D. SISSON.

SUBNIAHINE VESSEL.

AILICATlON FILED JUNE 25. i918. RENEWED OCT. |3. 1919.

6 SHEETS-SHEET l.

W. D. SISSON.

SUBMARINE VESSEL. APPLlcAnoN FILED 1uNE 25.1918. RENEWED ocr. 13,1919.

1,321,562. Patented Nov. 1l, 1919.

j; l Q 57 w`. o. slssoN. SUBMARINE VESSEL.

APPLICATlON FILED JAUNE 25. |918- RENEWED OCT. 1.3.1919.

6 SHEETS-SHEET 3.

Patented Nov. 11, 1919.

W. D; SISSON.

SUBMARINE VESSEL. APPLlCATloN F1LED1uNE25.1918. RENEwED ocT. 13,1919.

W. D. SISSON.

SUBMARINE VESSEL.

APPLICATION FILED JUNE 25. 19'18- RENEWED OCT. I3. 1919.

W. D. SISSON.

SUBMARINE VESSEL.

APPLICATKON FILED JUNE 25.1918. RENEWED OCT. 13,1919.

sirnTns PATENT ormoni.

'lllJLLAIVI DAVID SISSN, 0F NEW YORK, N. Y., ASSIGN?, TU THE AMERICAN SALVAGE ooiirrmvr, INC., or weer New JERSEY.

NEWT JERSEY, A CGB/PORTION Oli NEW SUBMARINE VESSEL.

Application :filed June 25, 1913, Serial No. 241,767. Renewed October 13, 1919.

ing to vbe a. full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to ina re and use the same.

rlhe present invention relates to improve.

ments in subn'iarine vessels, particularly adapted for salvage Work on sunken ships.

ln my prior Patent No. 1,134,963, dated rrpril (i, 1915, l have shoivn a vessel of this type in which there is a hollow shell adapted to carry the operators of the vessel and be submerged alongside of the hull of a sunken vessel to the sides of Which the salvage vessel may be magnetically attached by means of magnets niovably mounted upon the'eX- terior of the shell and controlled from the interior thereof so that after the magnets have been attached to the hull of a sunken vessel, the salvage vessel may be moved with respect to the sunken vessel as may be desired, The salvage vessel is also provided with a drill by means of` which a hole n'aay be bored in the side of the sunken vessel and into this hole may be inserted a hook to v-.fhich a. chain leadingto a lifting` pontoon or other devicemay be attached. In order to permit the hook to be manipulated from the interior of the shell, a magnetic member extending through the wall of the shell and to the outer end of which the hook may be attached is provided.` lt is intended that the salvage vessel shall be lowered from suit able supporting devices, but it is provided with a. propeller and a rudder by means of which it may be navigated through the Water after 1t has been submerged to enable it to be brought into the desired position adjathe shell to be easily brought to the sniff'ace,`

in ease of accident to the hoisting' apparatus or' any other emei'sueies.

The shell of the sa :age vessel 1s also pro' Specification of Letters Eatent.

s; and l do hereby declare the follovv-v `Fatel'ited Nov. 11, 1919.

sei-iai No. 330,321.

vided with suitable view ports and means for illuminating the area sur'rounding` the shell so that the progress of the salvage Workmay be observed.

lt is a general object of the present invention to improve the mechanism of a salvaging` vessel of this type so that it may be operated with greater reliability and accuracy when submerged and also with increased safety for its occupants. To attain'V this lgeneral object as Well `as other objects Which Will appear more clearly hereinafter, thel pres ont' invention comprises a vessel of such buoyancy that it will normally iioat in Water and the shell of the vessel is provided with an opening through which entrance and eXit may be obtained and this opening is providedv with a cover having suitable clamps and an automatic arrangement for lifting; the cover when the clamps are released so that in case of emergency the cover may be quickly opened. The shell of the vessel isalso provided with suitable port holes and lights upon its exterior for illuminating the surroundings. It is intended that the vessel shall be suspended from suitable hoisting apparatus, but since its buoyancy Will cause it to float in Water, propellers are provided for submergingr the vessel. ln or der that the vesselmay be navigated when submerged, other propellers and a rudder are provided, and all of the propellers are driven by a motor Within the vessel and may be suitably controlled.

The present invention also comprises an in-iproved arrangement for mountingv the attachino` magnets upon the vessel. In accordance with the present invention, each mag; net is attached to a carriage which is carried by a pair of screws rotatably mounted upon theexterior of the vessel and adaptedform of hook for attaching the liftingpontoons to the side of a vessel that is to be raised.

Other features `of the. present invention y and improvements over prior devices of this character will appear more clearly from a description of a preferred embodiment of the invention asshown in the accompanying drawings Vin which Figure 1 is an elevation of the exterior of the vessel; Fig. 2 shows Y the exterior ofthe vessel viewed from the left of Fig. 1; Fig. 3 is aview in section -walong .the line 3-3'of Fig. 2.showing the i mechanism within the vessel; Fig. 4 is a plan view of the bottornof the interior of the Vvessel, thefsection through the shell being taken at approximately the midpoint thereofpFig. 5 is a plan View of the mecha- *nism mounted within theshell on a somewhat lower section plane than Fig. 4; Fig. 6 is a detailed view in section along the line y6-6 of F ig. 5; Fig. 7 is asectional elevation ofthe bottomV portion of the shell along the lines7-7 of Fig. 4; Fig. 8 is a plan View showing the salvage vessel held in position against` the side of a submerged vessel; Fig. 9 is a `plan view partly in section of the hook inserting device with a hook held Y' line 1010 of Fig. 9;

thereon in position to'be inserted in holes in the side of a. submerged vessel; Fig. 10 is an elevation partly in section along the Fig. 11 shows the positionoccupied by the hook after it has A been inserted inthe aperture in the side of 35V hook.

thevessel and Fig. 12 is an end view 0f the Referring to the drawings in which similar reference characters denote similar parts throughout the several views', the shell of vunderstood that in practice suitable gaskets will'be provided to insure water-tight oints. Upon thev'exterior'of the shell aire formed y lugs 24 for attaching suitable lifting chains i or cables, which have not however, been Y shown inthe drawings.

suitable vi ew Attached to the exterior' of the bottom section 20 is a frame* work constituting a. standard for supporting the vessel whenfit is not suspended Y or-i'nKVV use. The bottom section is also pro Y vided'iwith suitable brackets and supports for other parts of the apparatus as will hereinafter-appear; I

The middle section 22 isprovided with port-'

holes

26 and 27. Also mounted upon this` section of the shell are brackets 28 for supporting lights fOl.' l111mnating the surroundings, these lights heilig preferably protected by cages 29.

The top section 21 of the shell is provided with port holesk 30 having glass windows, and an aperture serving as a passageway into and out of the shell. This aperture is pi'ovided with a cover 31 hinged at 32 and provided on its interior with clamps comprising depending links adapted t0 fit with in slots in the outer ends of lugs 34 projecting from the inner wall of the passageway. Operating handles 35 are attached to the lower ends of the links and engage the under surfaces of the lugs 34 by a cam action to enable the cover to be tightly clamped in place. A suitable gasket 36 for forming a water tight'joint should be provided. In order that the cover may be automatically lifted when the clamps are released, itis provided with an upwardly extending portion 37 adjacent the hinge 32 and to tie upper end of which is attached one end of a spring 38, the other end of which is attached to a. bracket 39 fastened to the outside of the shell. By virtue of this arrangement, it is only necessary for the operator to disengage the clamps, after which the cover will be pulled open by the spring so that he will not havel to lift the same. The upper section is also provided with a water tight gland 40 through which passes an electric cable 41 containing the conductors for supplying current to the apparatus within the shell.

Mounted upon a suitable .frame-work 45 within the bottom section of the shell is a motor 46, the speed and direction of rotation of which may be controlled by a suitable controller 47 provided with an operating handle 4S, the cable 41 being connected to the controller through suitable fuses and main switches as may be desired. The diiv ing pulley 49 of the motor which should preferably be in the form of a sprocket wheel, is connected by means of a sprocket chain 50 to asprocket wheel' 51 on a shaft 52 supported in bearings 53 attached to the frame-work in the bottom section of the shell. A sprocket 54 is loosely mounted near one end of shaft 52 and is adapted to be rotatably connected to this shaft by means of a clutch 55 having an operating handle 56 extending into position to be conveniently manipulated by the operator of the vessel. Sprocket wheel 54 is connected by sprocket chain 57 to a sprocket wheel 58 on a shaft 59 supported in suitable bearings 60 projecting inwardly from the wall of the shell. Loosely mounted upon shaft 59 are

pinions

61 and 62, each of which may be connected to rotate with the shaft by clutches 63 and 64 respectively, and these clutches are controlled by corresponding operating levers 65 and 66.

Pinions

61 and 62 mesh with pinions 67 and 68 respectively, and as shown most clearly a pinion 86 upon shaft 59.

in Fig. 3, each oi the last named pinioiis is attached to a shaft extendingthrough the wall of the shell. The shaft 69 which carries the pinion 67 has at its outer end a propeller 70, while the shaft 71 which carriespinion 68 has at its outer end a propeller 7 1t will be understood that the shafts 69 and 71 are carried through the walls of the shell in suitable bearings 73 provided with watertight packing. The propeilers and 72 are for the purpose of navigating the vessel in a horizontal plane, but in order to steer the vessel a rudder 71 provided. This rudder is attached to a post 75 extending through a suitable water-tight bearing in the wall of the shell and carrying at its inner end a gear 70 which meshes with a gear 77 on the end of a rod 78 provided with a steering` wheel 7 9 in position to be conveniently reached by the oihierator of the vessel.

As described above, the propellers 7 0 and 2 are adapted to be driven from the main shatt- 52 through the sprocket chain 57 under he control ot clutch 55, but there is also pro-vided another ,driving connection between this main shaft and the propellers so that they may be drivenv at a different speed than that produced by the sprocket chain 57. This alternative driving connection coinprises a pinion 80 mounted on shaft 52 at the end opposite to that at which the sprocket wheel is mounted. Pinion 80 meshes with a pinion. l81 loosely mounted upon the end of the shaft 82 and adaptedtobe rotatably connected to the shaft byaa clutch 83 having an operating handle 841. *Attached to the other end of shaft 82 is a pinion 85 meshing with There is thus foi-ined a driving connection between ina-in shaft 52 and the shai't 59 which may be used instead ot the driving connection formed by the sprocket 4chain 57, it being undestood that either one ot these driving connections may be used as desired, and that in addition to the variations in speed of the propellers produced by these two driving connections, the speed` of the motor may be governed by its controller, so that the speed of the propel- 1ers may be controlled to a degree sufficient iler practical purposes. the tact that the operating connections of the nropellcrs te the shaft 59 are under the control of separate clutches 63 and 64, either or both of the propellers may be operated., so that the vessel may be steered by the propel- 1ers. ii ne essary.

Attached to one end of the main shaft 52 is a sprocket wheel which is connected by a sprocket chain 91 to a sprocket wheel 92 on a shaft 93 mounted .in suitable bearingsv 94.k lli-oosely mounted on shaft 93 is a gear 95 adapted to be rotatably connected to the shalt by clutch 9G Ahaving any operating handle cfiear meshes with a gear 98 on one end of a shaft 991 There is also Also by virtue oi2V mounted upon this shatt a somewhat larger gear 100 which meshes with a gear 101 loosely mounted upon shaft 93 and adapted to be connected to this shaft by a clutch 102 provided witli an operating handle 103. 0n account of the difference in gear ratio, between the pairs of

gears

95, 98 and 100, 101, the shaft 99 may be driven from the sha't't 93 at two different speeds, and by controlling the speed of the motor, the shaft 93 may be driven at dillferent speeds, so that in prac tice the speed of the shaft 99 may be varied within limits as desired. Upon the shaft 99 are pinioiis 1011 and 105 which engage gears 106 and 107 respectively, on the ends of vertical sha'ft-

s

108 and 109 respectively, which lpass through suitable water-tight liiearings in the bottom of the shell and carry at their lower ends piopellers 110 and 111. These propellers are for subinergiiig the vessel, an d in order to prevent rotation of the entire vessel about a vertical central axis, the pro-A The free end ofshaft 93 is provided with a pinion 112 engaging a pinion 113 on a shaft 114 to which is attached a sprocket wheel 115 connected by a sprocket chain 116 with a sprocket wheel 117 loosely mounted upon a sha1-t 118 but adapted to be connected to the latter by a clutch 119 controlled by an operating handle 120. rlhe shaft 118 eX- tends through a suitable water-tight bearin 121 in the wall of the shell and carries at its outer end a pinion 122 meshing with a pinion 123 upon a 'horizontal shaft 124 mounted in suitable bearings on the exterior of the shell. Upon shaft 124- are four pinions 125, each oi which engages a pinion 126 on the end of a vertical screw 127 rotatably mounted in suitable bearings formed at the outer ends of brackets 128 projecting` from the exterior of the shell. As appears most clearly in Fig. 2, these vertical screws are arranged in pairs and upon each pair is side of a sunken vessel, there will be a certain amount of ileXibility between them and the shell of the salvaging vessel. Since any suitable form ot swivel connection may be used for the magnets., the saine has not beenV shown in detail herein.

In' addition to the pairs of vertical screws there are airs of horizontal screws 135 reach mounted upon the exterior of the casing, i

1 supported inrsuitable bearings at theouter ends of brackets 136 projecting from the ex- Y terior of the shell. .Y Upon each pair of horizontal screws is a carriage and a magnet in all` respects Vlike the magnets 131 mounted VVupon the vertical screws, it Vbeing underzontal' screws 135, there isassociated with each of these screws, a pinion 137, each of Y which meshes'with a pinion 138 on a vertical shaft 139 which carries Vnear one end a pinion 140 meshing with a pinion 141 on the end of a shaft 142 extending into the shell throughY a vsuitable water-tight bearing 143 in the wall thereof. Within the i shell, the shaft 142 carriesa sprocket wheel 144 connected bya sprocket chain 145 with za sprocket wheel 146 loosely' mounted on theshaft118 and adapted to be operatively connected to the sprocket wheel 116 by a `shifting of .the clutch handle 120 in a direc- :tion opposite to that which as previously described is necessary to connect the sprocket wheel 116 in operative relation to the shaft'118 through clutch 119. There is` thus provided a simplel construction by Vmovement of the corresponding magnets which either of the

shafts

118 or 142 may Vbe operatively connected to the shaft 114 which is driven from the motor, and furthermore, the arrangement is such that both ofthe

shaft

118 and 142 cannot at the same time be connected to the shaft 114 thus preventing any possibility of simultaneous operation of the horizontal and vertical screws which wouldY result in injury to the apparatus in case all of the magnets were energized' and in engagement with a` submerged surface. c Y

VIn order that the operator within the shell may be advised of the extent of movement imparted to the magnets on the Iexteriory of theV shell, there isprovided on the end of eachof shafts 118 and 142 a travelingV pointer 147, each of which is adapted to be moved back and' forth along a scale 148 by a screw on the endk of the corresponding shaft, the extent of movement'of theindex yalong the scale Vbeing proportional tov the with respect to the shell. f. l

` For the purpose of vboring holes in the sides of a 'sunken vessel for attachment of a hook, there is provided a drill 156 on the end of a shaft 151 which passes through a sleeve 152 slidably mounted in a-water-tight bearing 153 inzthe wall of the shell.`

Splinedupon the inner end of the shaft 151 is af gear 154A mounted' between stops- 155 holes in a submerged surface.

which also serve as bearings fr the inner end of shaft 151. Gear 154 meshes with a gear 156 loosely mounted upon the main shaft 93 to which it is adapted to be con nected by a clutch 157 controlled by an operating handle 158. For the purpose of feeding the drill through the side of a sunken vessel, the sleeve 152 is provided Within the shell with a cross piece 159 through the ends. of which are threaded screws 160 rotatably supported in suitable bearings and carrying at their outer ends pinions 161 which mesh with worms 162 on a shaft 162 lto one end of which is attached a gear 163 meshing with a gear 164 on one end of a shaft 165, to the other end of which is attached a pinion 166 engaging a worm 167 loosely mounted on a shaft 93 but adapted to be rotatably connected to this shaft by a clutch 168 controlled by an operating handle 169. A pulley 170 is loosely mounted upon the other end of shaft 162 but may be connected to rotate with this shaft by a clutch 171 provided with an operating handle 172. Pulley 170 is connected by a belt to a small motor 173.

The arrangement for holding and inserting a hook within holes drilled in the side of' a sunken vessel comprises a shaft 180 extending through a water-tight bearing 181.in the wall of the shell and supported at its inner end in a bracket 182. The inner end of shaft 180 is screw-threaded to receive a gear 183 which meshes with a pinion 184 loosely mounted on shaft 93 but which may be connected to rotate with this shaft by a clutch 185 controlled by an operating handle186. In order that rotation of gear 183 may produce longitudinal movement of shaft 180, this gear is attached to the bracket 182 by means of pins 187 fitting in a groove in the hub of the gear as shown most clearly in Fig. 6. The arrangement described above will provide for longi* tudinal movement of the shaft 180, but since it may be necessary when inserting a hook in the holes whichk have been bored in the side of a sunken vessel that the shaft 180 be given a rotary movement, a hand lever 190 is splined upon the shaft 180 between the arms of a bracket 191 as shown most clearly in Fig. 6.' The lever 190 is provided with a locking` device 192 adapted to be inserted into teeth cut on a retaining member 193. Attached to the outer end of shaft 180 is a magnetic member for holding the hook preparatory to inserting it in This magnetic member comprises a base portion 195 screwed upon the end of shaft 180 and pro- Yvided with washers to form .a tight joint.

Attached to each end of the base 195 is an electro-magnet comprising an outer shell 196, the coil 197 and a core 198, the latter Vbeing formed with a shoulder'199 near its inner end adapted to engage the end of the outer shell 196, and a smaller portion which extends through the end of the shell and receives a bolt 200 for fastening the magnet to the base member 195. A washer 201 is provided for making a tight joint. The magnet conductors 202 are carried through an aperture inthe end of the casing 196 and then through a bore in the base member 195 and finally through a bore in the shaft 180 by which they are led into the interior of the shell to suitable controlling switches. By the provision of the washers as described, there will be no leakage of water into the shell through the magnetic head and the bore in shaft 180. The outer face of each of the magnets is formed with a conical depression as at 203 adapted to receive a correspondingly shaped end of a portion of the hook.

The hook userfor attaching a pontoon to the side of a sunken vessel comprises a yoke 205 having the shape shown most clearly in Fig. 12, and to the cei'rtral portion of which a chain 206 may be connected. rl`he enlarged ends of the yoke arc each provided with an aperture as at 207 within each of which is mounted a shank 20S of the hook. Each of the shanks is provided with a pointed outer end 209 and an enlarged pointed inner end 210 adapted to it .vithin the conical depression 203 in the face of the magnet. Along the sides of each shank are a number of Slots 211, the outer ends of which are under-cut as at 212 to serve as sockets for retaining the ends of latching members 213 placed within the slots and adapted to be forced outwardly by springs 214. It is intended that the shanks shall be so related to the yoke 200 that the latter will normally hold the latching members in place within the slots as shown most clearly in Fig. 10, and in order to prevent the yoke from dropping off of the shanks, the apertures in the yoke may be provided with inclined depressions forming shoulders as at 215, which shoulders engage the outer corners of the latches when the hook is in its normal condition. The latches 213 should preferably be formed with a squared portion as at 216 so that after the shank has been pushed into the hole, the latches will be forced outwardly into the position shown in Fig. 11.

While the occupants of the vessel may be .supplied with air through a hose leading to a pump on a tender ship at the surface, prefer to provide the shell with means for furnishing fresh air to the occupants, so that the `air supplied is independent of any surface connections. For this purpose, reservoirs of compressed air or any other well known method of providing oxygen for the occupants of the shell may be used. In order to exhaust the foul air, there is provided a compressor 220 driven by a motor 221 and having its intake within the shell and its outle-t communicating with a port in the wall of the shell. A relief valve 222 controlling a discharge pipe within the shell is provided in order to permit the compressor to be started in case difficulty should be experienced in overcoming the external pressure. The vessel will also be provided in practice with suitable gages for indicating the depth to which it is submerged, as well as gages and other instruments for indicating the pressure and condition of the air within the vessel to avoid any danger to the occupants. The vessel should also be provided with suitable signaling devices and telephones by which communication may be held with the tender ship.

W hen the vessel is to be used for salvaging work the operators enter the saine and clamp the cover in place. The vessel is then lowered into the water in the vicinity of the wrecked vessel and the submerging propellers are connected to the driving motor 46 by manipulating either one of the clutch handles 97 or 103 according to the speed at which it is desired the propellers shall be rotated, and as has been explained above, the motor may be governed by the controller 117 to produce other variations of speed. The propellers will draw the vessel downward through the water, and since they rotate in opposite directions they will not produce any turning effect upon the shell. While it is intended that the vessel shall be connected to suitable hoisting apparatus on the tender ship, it may be navigated after it has been submerged by the submerging propellers as well as by the propellers 7 0 and 72 and the rudder 74. As has been explained above, the driving shaft 59 for the last named propellers maybe driven at either one of two speeds by manipulating either the clutch handle 50 or clutch handle 84rto connect the driving connections controlled thereby to the driving shaft for the propellers. Either or both of the propellers may be operatively connected to this driving shaft by manipulation of clutch handles 65 and (3G, so that the propellers and 72 may be used for steering the vessel, as well as for causing horizontal travel of the same.

The salvaging vessel may thus be navigated until the sunken vessel is located, and it may then be further navigated along` the side of the sunken vessel until a point is reached at which a hook should be applied for attaching a pontoon or lifting cable. The lifting pontoons may be of any desired construction and have not been shown in the present case. The method described in my prior Patent #1,134,963 may be used for carrying the pontoon to its desired location and the hooks may be suspended from buoys on the surface so that they will be approximately at the points at which theyshould 30 171 ymaybe connected to drive the screws V16,()1in a. reverse direction at rapid rateto l be applied to the sunken vessel, but it will be understood that instead of the procedure outlined .in my prior patentk any other ymethod of` bringing the pontoons and hooks into their proper location may be used.

`llien the salvaging vessel is adjacent the Yhullof the sunken vessel at the point where a" hook should be applied, it may be madnetically attachedto the sunken. vessel by energizing the magnets y131. During the operation of drilling a hole inthe side of the vessel, all'of the magnets should preferably be energized so that the thrust of the drill -will not by its reaction .produce any appreciable movement of the salva'glng vessel.

The drill is put into operation by manipulation of clutch handle 158 which controls the gears 154c and 156 for producing rotatlon ofthe drilland the clutch handle 169 which controls the

gears

166, 167, shaft 165, gears 164 'andr163 which drive the screws 160 to advance the sleeve 152 throughthe wall of .the shell. The drill is thus rotated and fed throughthe side of the sunken vessel until a hole has been bor-ed through the same. Since the ,advance of thedrill is comparatively slow, means have been provided for Y producing a quick withdrawal of the drill,

and this means consists of the motor 173 which through kthe Ypulley 17 0 and clutch "cause the withdrawallof Vthe drill from. the

holein the side of the vessel, it being understood of course, that .the `gears forrotating andadvancing the drill are at this time disconnected from the @nain driving shaft 93.

v Since/the attaching hook comprises two shanks,` itwill be necessaryito drill two holes closely adjacent each other. rvIt is preferred that these two Aholes shall be placed horizonT tally, although they may be placed -verti Acally or at any other angle, if desired. If

theya're to be placed horizontally, the two 'magnets 131 carriednponthe pairs of vein tical screvvsl are denergized, but the mag- 1 nets carried upon the horizontal'pairs of screws are energized and therefore hold against the side of the sunken vessel. By suitable manipulation of theV clutch handle 120,the 'shaft 142 may be operatively connecte'd to the shaft 11st through the'sprocket chains '116s andlfl-. ARotation ofthe shaft 112 will through pinions 1&1 and 140 rotate the shaft 139 and therebyrotate all of the horizontalI screws. vSince the magnets are salvagingvessel witlifrespect to the side of scale la7-:148 within the shell, the amount est of.movementfnecessary to bring the drill in positi n forV the; second .hole may jbe gaccu' rately determined. When the salvaging vessel has been moved the proper amount, the rotation of the horizontal screws is stopped and the magnets on the vertical screws are again energized to clamp the salvaging vessel securely to the side of the sunken vessel. The drill is then operated to bore a second hole, after which the drill is withdrawn, the magnets on the vertical screws again denergized and the horizontal screws rotated to cause the salvaging vessel to be moved into such a position that the hook inserting device registers with the holes drilled in the side of the sunken vessel. If at any time the movement .desired to be imparted to the salvaging vessel with respect to the sunken vessel is more than can be taken care of by the length of the horizontal screws, the magnets on these screws may be denergized and the salvaging vessel heldin place against the `side of the slinken vessel by the magnets on the vertical screws, while the magnets on the horizontal screws are being moved toward one end of the horizontal screws, so that upon .subsequent attaclnnent to the side of the Asunken vessel, the necessary horizontal movement of the salvaging vessel may take place. If the hook is held in submerged posit1on,-it may be necessary to move the salraging vessel until the hook can be located and seized by the magnets on the end of shaft 180. After the hook has been seized by these magnets, the salvaging vessel may he moved by suitable manipulation of the horizontal and vertical screws to bring the hookinto position to be applied to thelside of` the sunken vessel. For this purpose, the clutch handle 186 is manipulated to operatively connect gears 18.3 and 18st to the main driving shaft 93, and if necessary, the lever 190 may be moved to swing the two Shanks of the hook into exact alinement with the holes in the side of the sunken vessel. The outward movement of shaft 180 will thrust the Shanks of the hook through the holes in the side of the sunken vessel until finally they reach a position such as shown in Fig. 11, where the latches 213 will be forced outward to engage the inside of the plates of the vessel, after which the hook holding magnets may be dcnergized and the rod 180 retracted by reversing the driving motor to cause the shaft 93 to rotate in the opposite direction.

In Fig. 8, I have shown somewhat diagrammatically in solid lines the position occupied by the salvaging vessel with respect to a submerged surface when the hole is being bored, and in broken lines, there has been shown the position occupied bv`the salvaging vessel and the hook retaining magnets when the hook is to be inserted in the holes in the side of the sunken vessel. In this case, the movement of the salvaging vessel from the position shown in full lines to thatshown in broken lines has been produced by rotation of the horizontal screws 135, it being understood that the magnets .arried upon these horizontal screws are energized, and thus lirmly held against the side or' the sunken vessel.

r1`he light furnished from the lamps on the outside of the she-ll of the salvaging vessel will sufficiently illuminate the surroundings so that the work may be observed through the observation windows .in the sides of the shell. lvhenever it is desired that the salvaging vessel be brought to the surface, rotation of the submerging propellers may be stopped so that the natural buoyancy or' the vessel will carry it to the surface of the water, and when it reaches the surface it is only necessary for the occupants to release the clamps holding the cover 31 in place when the spring 38 will automatically lift the cover. While the salvaging vessel is principally intended for use in attaching lifting devices to the sides ot sunken vessels, it may also be used for any kind of submarine work and since it is built to withstand high water pressures, it may be used for taking observations or performing other salvaging work at depths beyond that to which divers can safely descend. lt will also be understood that various changes in the details oit construction of the apparatus may be made without departing trom the principles of the invention.

I claim:

1. 1n a submarine vessel, the combination of screws rotatably mounted upon the exterior of the vessel and magnets carried upon said screws and adapted to be moved with respect to the vessel by rotation of said screws.

2. 1n a submarine vessel, the combination ol' a plurality of pairs of screws rotatably mounted upon the exterior of the vessel, a plurality of magnets each carried on each pair of screws, and means for rotating the screws of each pair in unison to move the magnet mounted thereon with respect to the vessel.

3. 1n a submarine vessel, the combination of a plurality of pairs of screws rotatably mounted upon the exterior of the vessel, means for driving` the screws or' each pair in unison, an electromagnet carried upon each pair of screws, and means for rotating the screws of each pair in unison to move the magnet mounted thereon wlth respect to the vessel.

t. ln subnnrine vessel, the combination of a plurality of pairs of screws mounted upon the exterior of the vessel, an elec tromagnet carried upon each pair of screws, a pinion attached to each screw, a worm gear meshing with the' pinions of each pair of screws, and means for driving each of said worm gears to rotate the screws of each pair in unison and thereby move the electromagnet mounted thereon with respect to the vessel.

5. In a submarine vessel, the combination of two pairs of horizontal screws rotatably mounted upon the exterior oi the vessel, two pairs O'f vertical screws rotatably mounted upon the exterior of the vessel, a plurality of magnets, one carried upon each of the pairs of screws, means for driving both pairs of horizontal screws in unison to cause horizontal. movement of the magnets carried on said screws with respect to the vessel, and means for driving both pairs or' vertical screws in' unison to cause vertical movement of the magnets carried on said vertical screws with respect to the vessel.

6. ln a submarine vessel` the combination of two pairs oi. l'iorizontal screws, rotatably mounted upon the exterior of the vessel, two pairs o vertical screws rotatably mounted upon the exterior of the ves sel, a plurality ot magnets, one carried upon each of the pairs oi.l screws, a motor, counections for driving both pairs ot' horizontal screws in unison to cause horizontal mover ment ot the magnets carried thereon with respect to the vessel, connections iior driving both pairs ot vertical screws in unison to `cause vertical movenient ot' the magnets carried on said vertical screws with respect to the vessel, and means :for selectively connecting to said motor the driving connee tions for said horizontal and vertical pairs of screws.

7. In a submarine vessel, the combination or a plurality of pairs of horizontal screws rotatably mounted upon the exterior oi' the vessel, a plurality of pairs of vertical screws rotatably mounted upon the exterior of the vessel, a plurality of magnets each carried upon each pair oli screws, means ttor driving the pairs oli horizontal screws in unison, means for driving the pairs oi' vertical screws in unison, means 'for imlepeiulently controlling the driving means 'for said horizontal screws and the driving moans vfor said vvertical screws, circuit connections for simultaneously energizing the magnets carried upon the horizontal screws, circuit connections for simultaneously energizing the magnets carried upon the vertical. screws, and means for independently controlling said circuit connections'whereby the magnets carried by said 1norizontal and vertical screws may be selectively energized.

S. ln a submarine vessel, the combination of a plurality of pairs of screws rotatably mounted on the exterior of the vessel, a carriage mounted on each pair of' screws, a sup-- port attached to each carriage, a magnet slidably mounted on each support and a spring associated with each support for moving the magnet outward thereon.

9. In a submarine vessel the combination of screws rotatably i'nounted on the exterior of the vessel, electromagnets carried upon the screws and adapted when energized to be held against a submerged surface and means for rotating said screwsrto produce move-v ment of the vessel with respect to the submerged surface when said electro-l'nagnets areV held against thek surface.

' 10. In a submarine vessel, the combination of a sleeve slidably mounted in the wall of the vessel, a shaft rotatably mounted in the sleeve, a motor for rotating the shaft, a member attached to the inner end ofthe sleeve,

*ond motor'and impartin-g to said screws a vrelatively rapid rotation to cause a quick movement of the sleeve and shaft with respect to the wall of the vessel.

` ll. In a submarine vessel the combination of a shaft extending through the wall of the vessel, means for imparting longitudinal movement to theI shaft without rotation thereof, a pair of electro-magnets mounted on the outer end of the shaft for holding a hook in position to be inserted in holes in a submerged surface by forward movement of the shaft, means associated with the shaft for rotating the same while permitting relative movement between the shaft and such means for changing the angular relation of the pair of magnets to the vessel, a latch associated with the shaft rotating means, and means cooperating with the latch for retaining it and the shaft rotating means in any desired position of adjustment.

12. A hook for use in connection with a submarine vessel comprising Shanks provided wit-h slots in their sides and enlarged heads, latches mounted in the slots of said shanks, springs for forcing said latches outwardly and a link provided with apertures within which the Shanks are fitted with the latches normally held within the slots by the walls of the apertures.

In testimony whereof I affix my signature June 2Q, 1918.

VILLIAM DAVID SISSON.

Witness:

DOROTHY M. LANG.

Copies of `this patent niay be obtained for five cents each, vby addressing the Commissioner of Patents,

v Washington, D. C.