US1380110A - Vessel superstructure - Google Patents

Description

A. McDOUGALL.

VESSEL 'SUPERSTRUCTURE. APPLICATION. FILED OCT. 18. 1919.

Patented May 31,1921.

ATTORNEY.

c T all whom it may concern:

ALEXAN ER MenoUcrALL, or DULUTH, fiI1\Tl\T QS O IA;

i':VESSEL sornns'rnno'runn. T

Be it known that I, ALEXANDER MoDoU- GALL, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new useful Improvements in Vessel Superstructures, of which the following is a specification, reference being had therein to the accompanying drawing.

The invention'rel tes to'vessels and-has q special reference to a vessel adapted to the carrying of bulk oil or common freight as desired. I

-The principal sel of this character which may be employed in. either form of such service with as little inconvenience as possible, it being well known that tank vessels used in the oil business are not commonly employed in the carrying of any other form of freight. 7

Other objects and advantages of the peculiar means by. which I accomplish such conveniently convertible vessel will appear in the further description of the invention. In the accompanying drawing formlng partof this application and in which like reference characters represent like parts: Figure l is a side elevation of a flush deck self-propelled vessel embodying my invention. I

2 is a top plan view of same. 4 v I I Fig. 3 is a transverse sectional view 1 through the hatch coaming of the vessel.

Fig. 4 is a transverse sectional view of the hull of a vessel through oneiof the hatchways therein, illustrating two embodiments of the invention.

Fig. 5 is a similar view to Fig. 4c of a vessel having an upwardly extending trunk hatch coaming longitudinally the main deck vessel which are employed for other pur-' poses. These bulkheads are indicated at 1 and 2 in the drawings and which are no de-.

parture from those commonly used.

The holds of such vessels are also commonly divided into small compartments object is to provide a vesmade by numerous bulkheads, thwartships and fore and aft-,so as to confine the oil in Specification of Letters Patent; Application fileaoetoberis, 11919. 1S erialNo, 331,606.- i i i i small 'spaces to keep fit under control inthe event of the ship laboring ill-rough weather.

Over each of such compartments is lo-. cated an expansion tank orrelafti-vely smaller compartmentto allow for the expansion of the oil 'and'the 'carrying' ofi. of gasses arising from-samedue' to itsaction within'the compartments.

9. 100p. bf thev expansiontanks are mounted pipesand valve connecv tions for both filling and-emptying the com-: partments as well as providing the necessaryrelief therefor, andsuitable manholes are also provided within the tanks for 'accessto the compartments. In exclus ve Oil carrying. boats these tanks are made fixtures to" the deck or built up as parts of thevessel, such tank vessels having. no prov s on. for; carrying other formsof cargo, such as hatches or the like and are confined strictly to thejone form of cargo which naturally results in; their being able to 'carryacargo inbut onedirectionj only.

-, so Now in myimproved structure ITprovide: theusual numberof large hatches common" to theordinary freight carrying vessel and prefer to form such hatches with "a low flat coaming indicated at 3 fixed to the deck 40f the vessel with preferably a. single plate '5,* though two separate plates and expansionv tanksfimay be used if preferred, at-each hatch space.

hatch and the hatch lcover'is, securely ibolted Theupper face of the 'c'oammg 3 1s inclined slightly away from-the to the coaming as clearly'indicated 'inFigz if I 3 there being rubber or other forms of gasket employed intermediate of the cover and coaming to insure water and oil tight connection therewith.

By this form of hatch and coaming it is evident that the deck of the vessel can be made equally as strong and secure as if Iijo hatches were formed therein and such hatch covers may be quickly removed by taking out of the bolts 6 and sliding or lifting themto a position intermediate of the hatches as illustrated in one instance in Fig. 6 of the drawings. v

On top of the hatch plates 5 are permanently attached the rectangular shaped expansion tanks or compartments illustrated at 7 they corresponding in size and necessary equipment to those previously referred toas employed in theordinary tank ship,

the equipment usually consisting of a relief valve and pipe indicated at 8, manholes indicated at 9, and other pipe connections such as for filling and emptying the tanks or for heating purposes, illustrated at 10.

Such vessel may be provided with a double bottom or not as desired and when constructed with a double bottom, the tank below can be used for oil cargo space, water" ballast or for fuel oil for the vessel as. preferred.

Some oil carrying vessels are equipped with a fixed upwardly extending trunk hatch coaming asillustrated at 11 in Fig. 5 and in such construction the hatches would be formed transverse the top of the trunk and the hatch covers 5 carrying the expansion tanks 7 bemoved fore and aft when desired in thesame manner as when located directly upon the deck of the vessel. 7 I

Some compartments in the vessel may be fitted to carry liquid cargo for which no expansion tank is necessary or such compartments may not be entirely filled, in which event the manholes and pipe fittings would be located directly upon the hatch plates 5 as indicated at 12 Figs. 1 and 4 and-which may be inclosed within a small deck house illustrated at 13 securely fixed to the hatch plate. 7 This house being a fixture upon'the hatch cover would be moved fore-and aft with it when the latter is manipulated and such modification without the deck house might be especially desirable in'the vessel having a continuous trunk hatch'and'in which the latter is used as expansion tanks for all of the compartments.

While the invention is illustrated as ap plied'to a substantially rectangular shaped ship the samemay be employed with equal advantage to the common type of vessel.

From the foregoing it is evident that l have devised simple and comparatively inexpensive means whereby the usefulness of a vesselparticularly designed for the carrying of bulk liquid cargo may be substantially doubled and one which may be used in the transporting of other forms of freight with but little change in its equipment and the novel combination of hatch cover with the accompanying parts fixed thereto may he slid or raised and lowered as required with but little more difiiculty than the hatch covers without such equipment.

Having thus described my invention, what I claim as new and-desire to secure by Letters compartments therein for carrying bulk oil cargo, of hatchways through the upper deck of the vessel communicating with all of the compartments, large fiat covers for the hatchways and expansion tanks carried by the covers whereby the vessel may readily {oe usied for carrying cargo other than bulk iqui 3. A double purpose vessel of the character described comprising in combination a plurality of vertically separated cargo compartments, hatches in the" upper deck of the vessel communicating with all of the compartments, large fiat covers for the hatches and expansion tanks for the compartments carried by the hatch covers.

In testimony whereof I hereuntov affix my signature in the presence of two witnesses.

ALEXANDER MODOUGALL.

Witnesses W. H. DENHAM, S. GEO. STEVENS.

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