US2365770A - Concrete ship - Google Patents

Description

R. NEBOLSINE CONCRETE SHIP Filed April 21., 1943 Dec. 26, 1944.

2 Sheets-Sheet l INVENTOR.

Dec. 26, 1944.

NEBOLSINE NVENTOR.

Patented Dec. 26, 1944 l Q ascend Y CGNERETE. Sm RossvNebol'sine, seaclifli, N2 HpplicatiomApril 21, 1943;. SeriabNo; 4835.845

The object of: the: invention: is: to provide: a. concrete; ship: of normal. exterior-'1 form and? which willv overcome" serious; defects ships of; this character heretofore proposed. These: defects" in concrete: ships include" as: a major: factor lack of adequate resistance to the heavy and reversible longitudinal bending; moments; and; accompanying shearing; stresses which. arewimposed; uponrthe shipsl hull, in; heavy weather;.; i V

The characteristic of. my construction. is; the provision of a: backbone composed; of. a. uni,- tary structure.- of hollow or box girders extending substantially from the bowtol stern: of. the hull and from. bottom to main deck positioned centrallyof\ the. hull: structure; this back. bone-,3 in. the preferred form, being tied to and coactin'g witha-steel-reinforced deck. and the. bottom shell ure 1 a cargo ship I having: deck hatches: 2 for rality of? spaced web: members 5. connecting: the

andpreferably to. a plurality of box girders, the

construction adequately resisting the: said. Ion..- gitudinal; bending, moments. The. said longitudinal: and, centrally disposed. integral combination ofv hollow or box. girder incidently serves. with the. transverse box. girder -constructions to divide the hull into a. plurality of holds; or waterrtight compartments and provide buoyancy chambers which are. ideal in refrigerated. ships: because the assemblies. of box girders arer hollow and are of such character that access to the; holds. may be reached; via. thetbox girder constructions. themselves through: the deck and. through side manholes wherever-desired. Also the. hollow girder construction provides; space for piping, and wirwalls at I. and 4'. l

shown in Figure: 3 the hull back bone? consists of a centrally disposed longitudinally extending box girder construction which extends the entire length of the hull and which consists of'spaced parallel walls 6* and l and connecting webs 8. As to'be'noted from Figure 3 the said back bonebox girderconst'ruction merges into the bottom of the hull indicated at 9', and. it also merges into the deck 3, being integral with the hull bottom and deck.

The major number of webs 5 and 8 are apertured so thatwalk-ways are provided for movementof men longitudinally of the box girders of the back bone or box girders of the. hull construction per se. However, at predetermined places in the said box girder construction, impering. in addition to the safety factor in event: of

puncturev of the outside shell;

The above. and further objects of the invention. willbel described with reference tothe accompanying, drawings, in. which:

Figure. 1 isa view in. elevation, showing, the embodiment ofthe invention in. at cargo ship.

Figure 2 is a planview, partly in horizontal section, on the lines 2-2, Figure 1.

, Figure- 3 is a transverse enlarged. section.- on the. line 3-3,. Figure 2;

Figure 4 is a fragmentary detailed. view showing: a. portionrof. the central longitudinal box girder construction and that area communicating with one of the transverse box girder constructions and illustrating access thereto from the deck and from one girder construction to another.

Figure 5 is a fragmentary sectional view, taken vertically through a side and part of the bottom of a modified form of hull in'which the bottom is cellular.

Referring to the drawings, I have shown in Figforate transversewebs are provided, as indicated at [0, H, [2, l3, and also at other areas. Thus should the hull be pierced at any point, the incoming water will be localized in an area bounded at each end bythe imperforate webs.

A plurality of spaced transverse box girder constructions are employed, each consisting; of spaced and opposed walls l4, 15, which merge into the walls of the back bone, the inner walls of the box girders forming the shell of the hull, includingthe bottom, and also the deck 3; The opposed walls I4, I 5, of the transversebox girder constructionsare connected by spaced perforated webs [6; each series' of these perforate webs being bounded at its ends by imperforate' webs H The deck 3 will be-provided witha plurality of manholes l8 placed directly over the transverse box girder constructions; Thus members of the ships staff or fitters may have access to each box girder section bounded by imperforate webs, may pass from the various sections of the transverse box girder constructions to the various sections of the back bone and also to the various sections of the box girder constructions at the sides of the hull as indicated, for example, by the arrows in Figure 3. If desired, water-tight doors may be provided in the holds for lateral or as a combined general freighter and oil carrier.

The provision of the central longitudinally extending box girder back bone" provides an ideally disposed support for erecting masts and booms employed in loading and unloading cargo. Also, and as an important factor, the said back bone gives strong support to the hull for side launching withmarine railways.

' Equally important to the above, is the function of the back bone in so taking up stresses particularly heavy and reversible longitudinal bending moments, so that reinforcing rods of steel and other reinforcing metallic members may be conserved and thicknesses of hull wallsreduced. In fact, the steel reinforced construction of the deck and bottom is, for the first time in hull structures of the present type, enabled to adequately resist lengthwise bending moments with the provision of relatively thin walls. For example, the walls I and 4, reinforced in the usual manner by steel rods or equivalent reinforcement, will be adequately strong in my hull construction when of -3-3 /2.

, In buildiing the hull and it constituent box girder constructions, the metallic reinforcing members may be supported by pins or other supporting means on the outside of forms, and the concrete blown by pressure onto the outside of the forms, which forms are pulled up before the deck is formed or placed. In this manner the density of the concrete is so increased that great strength is provided and, at the same time, the process of construction is simplified.

Extending from side to side of the longitudinal box girder constructions, and preferably lying at 7 both bottom and under-deck position, concrete girders, plain or steel reinforced, may be positioned, as indicated at l9, Figures 2 and 3. It will also be understood that various modifications may be made in the form and arrangement of the elements illustrated and described without departing from the spirit of the invention.

Having described my invention, what I claim and desire to secure by Letters Patent is as follows:

1. In a concrete ship, and in combination with a hull having sides consisting of hollow girders, a bottom and a deck, of a back bone construction consisting of a hollow girder construction extending substantially from end to end of the hull, longitudinally and centrally thereof and tied to the bottom and deck.

, 2. In a concrete ship, and in combination with (65 ter-tight compartments.

a hull having sides consisting of hollow girders, a bottom and a deck, of a back bone consisting of a hollow girder construction extending substantially from end to end of the hull, longitudinally and centrally thereof and tied to the bottom and deck, and a plurality of spaced transverse- 1y extending hollow girders tied to said back bone and to the hollow box girders, dividing the hull into a plurality of holds positioned at opposite 10 sides of the back bone.

3. A concrete ship construction in accordance with claim 1, in which the deck is of reinforced concrete construction merging into and integral with reinforced concrete walls of both the hollow girder side construction of the hull and the walls of the hollow girder constructions comprisingthe back bone.

4. A concrete ship [constructed in accordance with claim 1, in which the hollow girders are formed with spaced major concrete walls and series of transverse internal webs, each series including a plurality of perforate webs separated as to communication by imperforate webs, providing a plurality Ofwater-tight compartments extending both longitudinally and transversely of the hull.

5. In a concrete ship, and in combination with a hull having sides consisting of hollow girders, a bottom and deck, of a back bone construction consisting of a hollow girder construction, ex-

tending substantially from end to end of the hull, longitudinall and centrally thereof and tied to the bottom and deck, a plurality of spaced transversely extending hollow girders tied to the said backbone and to th side hollow girders,

dividing the hull into a plurality of holds po-' sitioned at opposite sides of the backbone, the hollow girders being formed Withspaced major concrete walls and transverse internal webs, in

140 cluding a plurality of series of perforate Webs,

each series of perforate webs being bounded at its ends by imperforate webs, providing a plurality of water-tight compartments extending both longitudinally and transversely of the hull, the

1, deck being provided with a plurality of spaced manholes, disposed over the hollow transverse girders for access to a plurality of the said water-tight compartments.

6. In a concrete ship, and in combination with a hull having sides consisting of hollow girders, a bottom and deck, a plurality of spaced trans versely extending hollow girders tied to the side hollow girders, dividing the hull into a plurality of holds, the hollow girders being formed with spaced major concrete walls and transvers internal webs, including a plurality of series of perforate webs, the series of perforate webs being separated by imperforate webs, providing a plurality of water-tight compartments extending both longitudinally and transversely of the hull,

ROSS NEBOLSINE.

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