US1510283A - Submarine or submersible boat - Google Patents

Description

sept.- lan Filed July 7. 1917 ammala SUBIARINE 0R SUBMERSIBLE BOAT Filed July 7. 1917 5 Sheets-Sheet 2 31404 tot Hilo:

Sept. 30 1924.

s. LAKE SUBMARINE OR SUBMERSIBLE BOAT 5 Sheets-Sheet 3 Filed July '2., 191:7

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Sept. 3o 1924.

Y 1,510,283 s. LAKE sUBmRIN'E on sUMERsILE son 5 Sheets-Sheet 4 :med July v. 1917 Y 1,510,283' Supt 30 |924. s. LAKE SUBMARINE 0R SUBMERSIBLB BOAT led July 'L 1917 s sheets-smet s Patented Sept. 30, 1924.

UNITED STATES SIMON LAKE, 0F MILFORID, CONNEGTIGUT.

SUBMARIN'E on SUBMERSILE BOAT'.

Application led July 7,

To all y107mm t may' concern Be it known that I', SIMON LAKE, a citizen oi the llnited States residing at Mil ford, in tlie county'of New Haven andI State or Gonnecticut, have invented certain new andi useful Improvements in Submarine or Submersible Boa-Es, of iv'liic'li the following is af specification.

The invention relates to improvements in submarine or submersible boats of that class constructed oi a plurality of tubular hull sections, and has for its object to provide such a boat of shipshape form to permit of the fair lines for surface navigation, and to withstand the pressures incident to submergence, the irwenti'on being particularly designed and adapted for carrying cargoes in bulk, such as Wheat, sugar, oils, and other expansible commodities, and whichV shall be designed and adapted to provide great hull strength and' displaceinent, and to insure a maximum degreev of safety, Cruising range, surface and submerged speed, and which shall possess greatv longitudinal strength when operating upon the surface under `"llo'ggi`ng` and "sagging" stresses', the construction and arrangement beingV such as to provide greater lonfitudinalf strength; greater stability, bothA or surface and submerged operation; a greater maximum degree of safety, and greater seaworthiness than boats of the same general type as heretoi'ore constructed;

The invention relates particularlyf to improvements in the constructions s own in United States Letters Patents Nos. 756,030; 926907, and 1,169,9703 granted to me March Q95 1904; June E22, 1909, and February l, 1916, respectively.

The invention consists in the novel construction of a submarine or submersible boat composed ot' a plurality of longitudinally arranged hull sections, each being of suilicient strength to withstand the maximum i pressure of submergence for which the boat is designed, and in the novel arrangement of a longitudinally disposed control compartment of substantially cylindrical form in cross section, and in the arrangement of substantially cylindrical passageways connected to saidv control compartment and to said hull sections, said control compartment and said passagewuys providing a longitudinal girder Well above the neutral axis of the boat, thereby not only providing greater strength when operating under begging 1917*. serial m. 179,183:

and sagging stresses, but also a' constructien aiording greater com-forts for the per'- sormelE than i'n boatsof thisY general typ as" heretofore constructedl, theV construction and arrangement being such'V that access may beY had between the control compartment aint-lg the longitudinal p'assafgeways, and to the several compartments of the boat as WillV be hereinafter described. rlihe inventionV further consists in the peculiar and noveli arrangement of a central, longitudinali? arranged water ballast compartfmerrt,y conibined with means for controlling tfli'e con cents er the' Severin ballast compartments@ thematic hull", whereby the said2 ballast compartments may be maintained completely liiled under varying changes of temprature, and especially when carryin cargoes G15 oilV and other expansible comme ities'.

The invention further consists in the pe;- culiar and novel arrangement of an anchor hoisting compartment' arranged" Within the bow ot the boat and having communica/tion with the control compartnielt, and i the peculiar arrangement of azr tiller comparti ment arrangedg in the stern section'l of the boat and also having communieatowith the said control compartme1it`,and further, in the provision of means 1ii-*hereby access between the said compartments and the aforesaid communicating passageways of theV boa-t may be controlled.

The invention still" further consists in the peculiar and novel construction of main bulkheads arran di throughout the marin hull sections of tile' boat, in the peculiar and novel arrangement of strengthening mem'- bers arranged within the main hullscions, and in certain other novel features of con-j struction and arrangements of arts as will be hereinafter fully describe and then claimed.

In the drawings, illust-retin the invention, in the several Afigures o which like parte are similarly designated, Figure 1 is: a diagrammatic longitudinal' section' drawnthrough theY after end of the'boat ong the' line (z-c of Fig. 7 of the drawings; Fig'. 2" is; a similarview drawn on the same line of the for-Ward endl of the boat. Fig. 3 is aYV da;i gft-aromatic longitudinal section drawn through the after endY of the boatV on the line Zi-b of Fig. 7. Fig. l is a diagrammatic longitudinal Section of the forward* @ne also drawn on the line b-Z) of Fig. 7. Fig. 5? is a horizontal sectional planV View of tlieY aftex' indicated by the arrows.

section of the boat. Fig. 6 is a similar view of thedforward section of the hoist.; Fig. 7 is a transverse section drawn on a larger scale through the main hull sections and through the control compartment of the boat. Fi 8 is a transverse section drawn through t e main hull sections and through the after communicating passage and through the engine and battery compartments of the boat. Fig. 9 is a transverse section drawn on the line c--c of Fig. 2 of the drawings lookin in the direction idg. 10 is a detail of construction illustrating a different arrangement for filling the main cargo carrying tanks of the boat when designed for carrying liquid cargoes.

The boat is preferably constructed of two parallel main hull sections 1, substantially cylindrical throughout their length and having upwardly inclined tapered bow and stern sections 2 VVand 3, respectively, said .sections being of gradually diminishing sizes and preferably of circular form, and from which extend Vplatings 2 and 3', to provide for a shipshape form of hull best adapted for surface cruising. The said hull sections are connected throughout their lengthY by suitable truss frames (not shown), whereby the said sections are rigidly joined to form a unit, it being, of course, understood that thesaid hull sections 1 are constructed of ribs 1 (Figs. and 9), and shell plating l in the usual manner. The hull platings l of the main hull sections are connected by a horizontally arranged divisional plate 4, Figs. 7 and 9. The bottoms l orlower surfaces of said hull sections are connected. by a plate 5 forming the bottom of the boat, the space thus formed between the inner sides of the main hull sections and the plate 4 and plate 5 provides a longitudinal compartment 7 extending throughout the entire length of the main hull sections 1. Connected to the main hull sections 1, and to the bottom plate or plates 5, are longitudinal vertically arranged beams 6, extending throughout practically the entire length of the hull of the boat, and which serve to provide the said central longitudinally extending compartment 5, said com'- partment being divided by transverse partitions 9 into a plurality of compartments 9', which may be utilized for various purposes in the operation of the boat. The space, formed between the after transverse partition 9 and buikhead 9, closing the space at the end of the main hull sections, provides a battery compartment 10 in which arranged battery cells 10 for operating the boat under submerged conditions. It will` bennderstood that the longitudinally arranged beams 6 will be perforated throughout their length to afford communication with the compartments 8, designed to receive water ballast, and also to provide communication between the Ysaid longitudinal compartment 7 and the lateral compartments 8. Between the partitions 9, forming the battery compartment and various other compartments which it might be desired to maintain water-tight, the said beams 6 will be of solid construction, so that a plurality of water-tight compartments may be provided throughout the length of the boat, the said Water-tight compartments being so distributed as to serve to the best advantage in the operation of the boat, such, for instance, as for the installation of pumping apparatus, air bottles, fuel tanks, storage tanks for fresh water, and other apparatus or articles, and intorwhich access may be desired under various conditions of the operation of the boat. It will also be understood that by the arrangement of the lateral water channels or compartments 8, there is open communication between the several intermediate compartments 7 and the lateral compartments 8, tl'iereby eliminating a plurality of valves for controlling the admission of Water to and the expulsion of water from the central compartment 7, as would be the case were the several com artments 9 completely cut ofi' from eac other.

The main hull sections 1 are divided throughout their length by bulkheads 11, preferably arranged in pairs of concaveconvex form in cross section having their concave surfaces arranged opposite each other whereby to provide greater strength to the hull sections. The ends of the main hull sections 1 are closed by similar bulkheads 12, and the spaces 13, formed between the after bulkheads 12 and the adjacent bullrheads 11, provide engine compartments in which are arranged engines 14, shown diagrammatically in Fig. 3 of the drawings` the said engines having their shafts extended through the hull of the boat and having propellers at their outer ends in the usual manner. It will, of course, be understood that suitable stuiiing-boxes are provided in the bulkheads, and in the plating of the stern of the boat, in accordance with common practice.

Extending upwardly from the tops of the main hull sections 1 are side members 15 of a superstructure 16, and connected to the said side members 15 are decks 18 havin their longitudinal edges connected to vertical walls 1.7 extending from the hull platings of the main hull sections, as shown most clearly in Figs. 7, 8 and 9, the said decks 18 forming what I prefer to term a harbor deck. The said superstructure and the said harbor deck extend from the extreme bow of the boat to a point adja cent to the end of the stern section, as shown in Figs. 5 and 6. There may also be a cruis- Leashes' irigdedk 19 on top of the superstructure 16, as shown in fu'll lines in Figs. 1, 2, 3 and 4, and as indicated by the dotted lines in Fig. 7, this deck Abeing shown as arranged over the central control compartment next described.

Arranged centrally Within the'superstrnctitre lied hv'ing its longitudinal center arranged over the center of gravity and center-of buoyancy of the boat, is a central control compartment 20, and from the ends o the control compartment extend substentially cylindrical passagcways 21 having* communication with the ends of the compartment 2() through openings 2E-oontroliel by doors The seid controi ediiphrtinent is tor-med with laterally arranged hetchwsys 24 1(Fig. 7), controlled domi-S25, said lhatchvvays opening into t soperstructure 16. Hatchways 26 (Fig. 7), may also be provided leading from the eetral control compartment to the adjacent cargo carrying compartments of the mein hull sections, and these hatchwnys Will beelesei by 'hatch covers 27 opening into sedeontrol Acompartment 20. `pening into the several Ycompartments ot' therinain hull see-tions 1 are hatchways 28 provided with lntteh coversi), said covers being provided Withfsuitable pipe connections 30 for lling the c'a-r ocarrying 'tanks or compartments, and Wit ventsSl, as shown. lVhile I have shown and described an arrangement for filling the several cargo carrying Comparo ments o'r tanks throng'htlie heten covers, 'it will, of course,lbe understood that theilling openings also may be utilized for Ypumping liqiiid cargoes from said tanksfo'r compartments, and, if desired, the said tanks or compartments may be filled and emptied through pipes SQlFig. 10). extending into thelbottoms of said tanks or compartments, and having connections through pipes 33 with suitable pumps (not shown), arranged Witlii-nthe boat, simil-ar to those employed infill siibmarine'boats lfor pumping Water intoend out-of the ballast-tenksfand in a iifraiinersomewhat similar-fico the method of pumping oii into and from surface oil carryreg-vessels.

oniiectedto the topof the central water compartment 7 are pipes 34 having their ends extending 'into and opening into the seid heitchiveys 2S. The pipes 34 vare provided with valves 35 having their stems extending' into V.the control compartment 2() and into Vthe passegew'ays, and provided with e 'rating handles. Ot course, it will be Vun" ersteod that one-of sech pipesand their'V valve connections nre' arranged Vin each cargo carrying'tank or compartment, end serve the pfurpose of controlling the contents of said tanks or compartments as viiilbe 1best understood from the genere] description of the operation of `the boat.

Admission of Vwater to the water conmem-4 incnts 7 is controlled by valves ith' (Fig. 7), having their stems extended upwardly throughthc horiiontal divisional plates 4, forming the top of the central water cornpart-ment T, and through the plating oi' the central control compartment 2f). and hnving their inner ends provided with hand wheels by which the valves :i6 are controlled.

The main hull scctions i arc provided throughout their length with lteelson beams 37, having their upper ends connected by horizontally arranged piates which mal,vr be solid to provide ballast compartments 39, or perforated so :is to provide continustions of the several ballast tanks or compartments oi' the main hull sections 1. ln either case, however, it Will be understood that the said keelson beams 3T and the said horizontally arranged plates 3S serve to strengthen the main hull sections 1, and from the inner longitudinal edges o the plates 38 there. may be extended strengthen ing plates 40 providing strengthening menibers upon opposite sides of the water ballast compartment 7, and the spaces adjacent to the several tanks of the boat.

The battery compartment l() may be thrown int-o communication with the engine compartments 13 through a passageway 4l extending through the hull platings of the main hulls and having its ends provided with doors or covers 42, and opening through one side of the said passageway 41 is a door way 13 controlled by a suitable door ieading` into said battery compartment. The said battery compartment :is also arranged in communication with the after passageway 21 through a hatchway 14 controlled by a cover 45, :i suitable ladder 4G (shown in dotted lines in Fig. S). being' provided to facilitate entrance to und exit from thc bettery compartment.

To the platiugs oi' the main hull sections, within the compartments 13 'forming the engine rooms, there are arranged a plurality of frames 47 tFig. 8), having their inner members connected airend Water-tight by plates 49, heving ends 50 which are also connected ai-rand water-tight to the hull plat ings of the main sections 1, whereby to provide compartments 5l.. which mag| bc ittilzed either as Water ballast compartments, or as inell compartments for the engines as occasion may dictate.

ln the extreme bow section of the boat there is arranged an anchor compartment 5:2 hav-ingv access with the forward ends of the psssageways 21 through tubular passages or tunnelsf, the entrances to which are controlled by doors'l controllingr openings formed in the bulkheads 12. The said anchor compartment 52 is provided with anchor weils 55 (shown in dotted lines in Fig. Q). which serve to house the anchors when lli the boat is operating either upon or below the surface of the Water, the said anchors being, of course, supported by suitable anchor cables (not shown), Wound upon hoisting drums (not shown), mounted Within the anchor compartment 52, it being understood that suitable mechanisms operable from Within the anchor compartment, or from within the central control compartment, are arranged for operating the hoisting drums for controlling the raising and lowering of the anchors ince this feature of the invention is common in submarine boats, and particularly that class shown and described in my United States Letters Patent No. 716,059. l do not deem it necessary to dwell in detail upon this feature of the invention; and While the construction shown in my said latent No. 716,059 shows the anchor cable wound upon drums on the sides of the conning tower or turret of the boat, it is obvi ous that similar drums may be arranged within the anchor compartment, and operated either from said con'ipartment, or from the central control compartment, Without departing from the broad idea of the invention.

In the stern section of the boat there is located a tiller compartment 60 having snit.- able connections (not shown) arranged therein for controlling the position of the rudder, and this compartment 60 is connected through a passage tube 61 with the after ends of the after passageway 2l, and, like the passageway at the forward end of the forward passage tube, is controlled by a hatch cover or door 62. It will be understood that suitable connections will be made between the tiller compartment and the control compartment for operating the rudder. but as this feature also forms no part of the present invention, it is not thought necessary to show or describe the same.

It will, of course, be understood that the boat, as herein described, will, of necessity. be provided With suitable observation towers, periscopes, and guard rails as is customary 1n all submarine or submersible boats.

I do not claim the broad idea of constructin a submarine or submersible boat of a plurality of parallel tubular hull sections` since this construction is clearl shown and described in my aforesaid l nited States Letters Patent ho. 926,007, of J une 22, 1909, but what l do claim is that the construction shown in the present application provides a form of construction Aglving greater longitudinal strength than that of an ordinary ship under begging and sagging stresses, due tothe fact that both the moment of inertia and section modulus of the material entering into the construction of the hull is greater than that entering into the construction of lthe hulls of other vessels of the same. length, breadth, and depth of hold. The hull is constructed of tubular sections extending throughout the greater part of `the boats length with keelsons of great strength, by Which, combined with the upper tubular section, there is provided a construction which serves to take up all tension imposed upon the vessel under hogging stresses, and with my special arrangement of deck plates located well above the neutral horizontal axis of the boat, the strains coming upon the vessel under hogging" stresses, such as occur when riding the crest of a Wave, are also taken care of. Also, nity novel method prevents the shifting of liquid cargoes of expansible nature, whereby the cango carrying tanks or com partments may be maintained to their full capacity, or as expressed in nautical terms chock-a-block, which is an absolutely essential feature of navigation, as it prevents the shifting of the cargo, and hence the excessive pitching or rolling of the vessel. which would otherwise occur when the tanks are only partly filled. This feature of my invention may be best understood from the following description of the general operation of the invention, attention bein invited particularly to Fig. 7 of the drawings, in which the central ballast tank 7 is shown provided with water inlet valves 36 open to the sea, and operated from Within the central control compartment 20, whereby the flooding of said compartment 7 may be controlled. It is Well known that oil expands under rising temperatures. To provide for such expansion, I purpose to first admit a certain amount of sea water into the tank or tanks 7 corresponding to the maximum amount of expansion which may be expected` which depends upon the specific gravity of the cargo. The valves 36 are then closed. Oil may be pumped into the several com partments of the main hull sections 1 with the vents 31 and valves 35 open so that the said compartments may be filled chock-ablock, after which the said vents are closed and the filling pipes removed. The water inlets 36 to the said compartments are then sealed. This operation, of course, will take place when the several ballast tanks or compartments are being filled through` the hatches arranged in the harbor decks of the boat, and when the said ballast tanks or compartments of the boat are ben ing filled or emptied through the pipes 32 leading into the bottom sections of the said tanks or compartments, the said inlets 3() connected to the hatch covers 29 will be maintained closed, and the vents '3l will remain open so as to insure the complete filling of the said tanks or compartments. The valve or valves 36 controlling admission to the Water channels 7 and 8 may then be o en to the sea, and dueto the fact of the di erences between the specific gravity of water 4Jun . several tanks or compartments, the consequenee would be to form a vacuum within the tanks or compartments so that sea Water will be drawn into the tanks 7 to thus force the-oil inthe upper end thereof back into the tanks or compartments of the hull sections l, thus always maintaining the compartments completely filled, which is essential especially in submarine boats. since it prevents the shifting of the center of gravity of the li uid contents, which would otherwise take ptlace andhence cause difficulty in maintaining the trimV of the boat.

It will be noted that the tubular pressure resisting members 1 of the vessel have their forward and after ends connected by the bow and stern sections 2 and 3', which sections are preferably constructed so as to be normally open to the sea, and that the 'torward and after main hull sections have their axes arranged in upwardly inclined directions so that they will merge fairly into the no-npressureresisting bow and stern sections, to permit of the fairing lines of the boat. `It will also be noted that by providing the double bulkheads of the shape described, I provide a plurality of coii'er damsV throughout and at the ends of the main hull sections so that in the event of injury or an explosion in any one of the several tanks or conipartrnents of the boat, it Will be understood that one ot the bulkheads will be under tensionand the'other under compression, hence providing-a very strong construction capable of preventing the force of the explosion in any one compartment Jfrom extending into the adjacent compartment. Compressed air pipes (not show-n). will be extended into the cotfer dams and into the several compartments: of the boat, whereby water may be blown from and the compartments kept free from Water in the event' of rupture to the platings of the boat at or near the bottom thereof. It will also be appreciated that the spaces formed: by and between the double bulkheads may be used as ballast tanks, or as fresh iva/ter tanks, fuel tanks, or for the storage of other commodities carriedfby the boat.

It will thus be seen that l provide a construction of hull whereby a boat of greater length and of exceptionally shallow-draft commensurate with the length and beam may be produced,y and one that possesses great longitudinal. and transverse strengthq and particularly adaptedV for the carrying' of liq uid cargoes, By this construction also the shifting ot' ,liquid cargoes of expansib-le nature may be prevented or provided tor, so that the boat may be maintained upon an even keel when travelling submerged, or in a semi-sulnnerged rendition, and whereby is avoided excessive ioiling and pitching motion ci the ship when operating upon the surface ot the water, and furthermore, whereby the longitudinally arranged substantially cylindrical control and communieating compartments, combined with the arrangement of keelsons. is provided :i novel 'forni ot submarine boat possessing greater advantages and greater strength than that ot similar vessels heretofore constructed.

.lt will. ot' course, be understood that various strengthening plates, or, in other WordsE bulkheads. may be arranged throughout the several cargo carrying tanks or compartments to add greater strength to the hull sections,V and that the central Water compartment 7 may also be provided with suitable longitudinally arranged beams or keelsons T0, as shown in Fig.` 9', and' which may be connected by transversely arranged per- Vtorated bracket plates 7l having their opposite ends connected to the beams 6, thereby providing supports both for the beams or keelsons 70 and the beams 6.

What I claim is:-V

l. In a submarine or submersible boat` a plurality of hullV sections having a 'plurality of oil carrying tanks or compartments, a control compartment arrangetl above and connectcd to said hull sections and communicatinnr therewith. and means operable from Within said control compartment for governing the contents of said tanks or compartments,

2. In a submarine or submersible boat, a plurality of main hull sections having transversely extending passages, means for controlling the said passages, a superposed control Vcompartment connected to and communicating with saidmain hull sections, bulkheads arranged within said main hull sectionsV providing a plurality of cargo carrying tanks. and means operable Jfrom Within said control compartment for governing the contents of said tanks, substantially as set forth.

3. ln a submarine or submersible boat, a plurality of main hull sections havin transversely extending passagesgnaens or controlling the ends ofsaid passages, a superposed control compartment connected to and' communicating with said main hull sections, bulkheads arranged within said main hull sections providing a plurality of cargo carryingrtanks. means operable from Within said control compartaient for governing the contents of said tanks, as specified, and a superstructure extending from said hull sections and surrounding said control compartment.

4. A submarine or submersible boat, comprising a lurality of hull sections provided with bulklieads, a central control compartment arranged above said hull sections and communicating therewith, bow and stern sections connected with said hull sections and with said control compartment, an anchor compartment arranged in the bow section ot the boat and a tiller compartment arranged in the after section of the boat, and passage Ways ali'ording communication with said anchor compartment and with said tiller compartment.

5. A submarine or submersible boat, comprising a plurality of substantially cylindrical hull sections united to each other, a substantially cylindrical control compartment arranged above and connected to said hull sections, and substantially cylindrical sections connected to said hull sections and to Said control compartment, said control compartment and said cylindrical sections providing a longitudinal girder above the vertical axis of the boat.

6. In a submarine or submersible boat, constructed of a plurality of substantially cylindrical hull sections united to each other, a superposed substantially cylindrical control compartment, and substantially cylindrical passageways connected to the forward and after ends of said control compartment, said control compartment and said assageways providing a longitudinal gir er well above the neutral axis of the boat.

7. A submarine or submersible boat, comprising a plurality of independent hull sec tions united to each other and having platings providing the bottom of the boat, longitudinally arranged beam-s connecting the platings of said hull sections and said botr tom plates providing a central longitudinal water compartment, a substantially Vcylindrical control compartment arranged above and connected to said hull motions, and substantially cylindrical members extending fore and aft of said central control compartment and communicating therewith, said central control compartment and said cylindrical members providing a superposed girder, substantially as specified.

8. A `submarine or submersible boat, comprising a pluralityr of substantially *cylindrical hull sections, bow and stern sections connected thereto, bottom platings connected to the platings of said hull sections, longitudinally arranged beams connected to the plating of said hull sections and to said bottom platings, as and for the purpose specified, a superstructure extending from the said hull sections, a control compartment arranged within said superstructure and connected to andV communicating with said hull sections, and longitudinally arranged tubular sections connected to and communicating with said central Control compartment, said control compartment and said tubular sections providing a longitudinal girder well above the neutral axis of the boat.

9. In a submarine or submersible boat, a plurality of hull sections united to each other and having bow and stern sections to provide a shipshape structure, platings connecting the lower sides of said hull sections providing a longitudinal water channel, as and for the purpose specilied, a superstructure arranged above and connected to said hull sections, Va centrally disposed control compartment connected to and communicating with said hull sections, and substantially cylindrical passageways connected to the ends ot' said control compartment and to said hull sections and communicating with said control com artment and with the said hull sections, sai control compartment and said passageways providing a longitudinal girder well above the neutral axis of the boat. i

10. A submarine or submersible boat, comprising a plurality of individual hulls containing individual ballast tanks or compartments, a central water compartment commuuimitingV with said ballast tanks or compartments, and means for controlling the admission of water to said compartments.

l1. A submarine or submersible boat, comprising a plurality of individual self-con tained hull sections having a series of individual cargo carrying compartments, an intermediate water compartment, a control compartment arranged above said hull seetions, and means tor controlling the admission of water to said water compartment and operable from said control compartment.

l2. A submarine or submersible boat, comprising a plurality of individual self-contained hull sections having a series Vof individual cargo carrying compartments, a centrally disposed water compartment communicating with said cargo carrying compartments. said Water compartment being disposed below said cargo carrying compartments, a central control compartment arranged above said hull sections, and means operable from within said control compartment for governing the contents of said cargo carrying compartments when said cargo carryingr compartments contain expansible cargoes.

13. In a submarine or submersible boat. a plurality of self-contained hull sections structurally connected and provided with a harbor deck and a superstructure, a substantiallyr cylindrical control compartment arranged within said superstructure and communicating with said hull sections, and a substantially cylindrical passageway extend ing,r from nach end of said control Campert ment and cmnmunicntinY therewith and connerted tn said hull Sections substantially ne; Hperified,

14. A Submarine nr submereiblc heilt, mmprising :i` plurality of individual self-mntaining hull sentirme, having a lnngit'ndiA nully arranged Water compartment located in and by the space formed between Said hull Sectio-ns and communica/singf with said hull sections, a central control compartment arranged above and connected fosaid hull sections, and means controlling the admiseinn nf Water from said longitudinally arranged Water compartment lio said hull sections.

15. A submarine 0r submersible bont. coinprisingr a plurality of self-contained linll Sections united to each olher` and a substantially cylindrical control coinpirtmen arranged above and ronneted. tn Said hull Ser-tions and rumn'mnimiing therewilh. and snhetzmtinlly cylindrical sections arranged frirward and aft of Said control compartment and connected therewith and 1'0 said hull sections providing a` longitudinal gil-der above the neutra] axis of the boat.

In testimony whereof I have hereunto set my hand this 3rd day of July ik D. 1917.

SIMON LAKE. lllitnesses:

M. EVELYN KEEFE, LILLIAN T. MORAN.

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