US3670683A - Hulls of the ships and their methods of construction - Google Patents

Hulls of the ships and their methods of construction Download PDF

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Publication number
US3670683A
US3670683A US49865A US4986570A US3670683A US 3670683 A US3670683 A US 3670683A US 49865 A US49865 A US 49865A US 4986570 A US4986570 A US 4986570A US 3670683 A US3670683 A US 3670683A
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United States
Prior art keywords
ribs
skin
hull
frames
assembly
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Expired - Lifetime
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US49865A
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English (en)
Inventor
Bernard Jean Pierre L Bruniaux
Roger Jean Le Corre
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Direction General pour lArmement DGA
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Etat Francais Delegatien Minis
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/02—Hulls characterised by their construction of non-metallic material made predominantly of wood
    • B63B5/06—Decks; Shells
    • B63B5/10—Decks; Shells with multiple-layer planking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
    • B63B2005/242—Hulls characterised by their construction of non-metallic material made predominantly of plastics made of a composite of plastics and other structural materials, e.g. wood or metal
    • B63B2005/247—Hulls characterised by their construction of non-metallic material made predominantly of plastics made of a composite of plastics and other structural materials, e.g. wood or metal made of a composite of plastics and wood

Definitions

  • ABSTRACT A hull of a ship comprises a plurality of longitudinally spaced transverse frames on which are mounted in succession, a first continuous skin, a plurality of spaced longitudinal ribs and a second continuous skin. The skins and ribs are assembled on the frames with the latter in inverted position, and the assembly is inverted when completed.
  • the invention relates to hulls whose length lies between 20 and 60 meters and whose beam is between 5 and meters and which comprises at least ribs below the waterline. Vessels comprising such hulls may in particular be mine sweepers.
  • the invention is also such hulls.
  • An object of the invention is to make such hulls better able to meet the various practical requirements, particularly with respect to longitudinal resistance, sound insulation and elimination of the presence of the ribs from the interior space in the hull.
  • the invention contemplates the assembly of hulls of the type indicated above by successive superposition from the inside to the outside of transverse frames, a first continuous skin or plating, longitudinal ribs and a second continuous skin or plating, these various elements being preferably made of timber.
  • Each of the two skins is constituted in a known manner by superposition of a first wall formed of juxtaposed, longitudinal elements transversely spliced together and at least two other thinner walls of mutually crossing diagonals;
  • the enclosed spaces bounded transversely by the skins and ribs is divided lengthwise into compartments, preferably by bulkheads arranged transversely in relation to the frames, and the compartments are filled with a cellular substance;
  • each skin remains the same throughout its extent and the crosswise spacing between successive ribs is substantially the same between all these ribs, such spacing being practically the same as the width of one rib at the bot tom of the hull, whereas the height of each rib, i.e. its crossdirected to methods of construction of wise dimension perpendicular to the adjacent surfaces of the skins becomes greater the nearer such rib approaches the waterline;
  • the ribs are mounted on the outer face of the first skin by means of a first countersunk assembly passing through these ribs from the outside with their heads countersunk in the ribs, and the second plating is mounted on the ribs by means of a second countersunk assembly from the outside and being out of contact from the first assembly, the difierent elements of the assemblies being preferably spikes, screws or bolts of stainless steel.
  • FIG. 1 is a diagrammatic transverse section through a portion of a hull according to the invention.
  • FIG. 2 shows, on a larger scale, a segment of such portion of the hull.
  • the hulls of ships of comparatively large dimensions i.e. length greater than 20 meters and a width greater than 5 meters are generally constituted of:
  • This invention corrects these drawbacks by mounting the ribs on the outside of the skin itself fastened in the usual manner on the outside of the frames and then covering the assembly with a second skin or outer plating.
  • the frames are denoted by by 2, the ribs by 3 and the external skin by 4.
  • rigid bulkheads 5 are preferably added transversely with respect to the frames in various lengthwise positions each transversely bounded by the two skins 2 and 4 and by two consecutive ribs.
  • These bulkheads 5 divide the passageways between the skins and ribs into separate compartments which are filled with cellular material 6 such as a foam rubber.
  • Each of the skins 2 and 4 is preferably constructed in the manner described in French Pat. No. 1,355,791 filed Feb. 8, 1963 and issued Feb. 10, 1964.
  • These skins each comprises:
  • a first wall composed of juxtaposed, lengthwise elements (21, 41) each engaged with the next by insertion of round tou gues (22, 42) whose radius is slightly less than half the thickness of the element, in a corresponding groove comprising an arch slightly less than the arc of the tongue, so that two neighboring elements may, by intersplicing, assume an angular inclination with respect to the hull section;
  • a second wall composed of at least two layers of diagonals (23, 43) of planking or other material, the orientation of the elements corresponding to the successive layers being intercrossed.
  • the first skin comprises two layers of diagonals carried externally on the spliced element wall 21 and the second skin comprises four layers of diagonals of which two are carried internally and two externally on the wall of elements 4.
  • the outermost layer of the second skin is lined with a protective cover 7 composed preferably of a resin reinforced with glass fiber.
  • the various elements constituting the hull are preferably made of a material such as timber or reinforced plastic material which is magnetically and electrically insulative.
  • the frames and ribs are made of plywood.
  • the spaces between successive ribs remain identical all around the hull, as does the thickness of each skin: to obtain increased sound insulation and strength at the lower parts of the hull, all that is necessary is to vary the transverse sections of the ribs.
  • each rib is usually rectangular and the width of each rib is preferably of the same order of magnitude as the space between two consective ribs at the lowest portions of the hull. In these latter zones, the height of each rib is of the order of twice its width, while the rib section is substantially square at the level of the waterline.
  • the building of such a hull is preferably carried out in inverted condition: first the frames are placed with their concavity facing downward, then the frames are covered with first skin 2 in known manner, for example by means of screws or spikes 8 for wall 21 and coupling pins for walls 23; then onto the skin 2 are mounted the ribs 3 and bulkheads 5, preferably by means of screws 9 and nut-and-bolt units 10 countersunk into these ribs with their heads flush; the cavities thus formed are lined with foam material 6', and finally the second skin is mounted on the outside of the cavities thus lined, preferably by means of screws or spikes 1 I and coupling pins; the various assembly methods described above are supplemented by adhesively joining the elements together. It then suffices to line the assembly with the protective coating 7 and invert the finished hull.
  • the first skin be advantageous to obviate any contact between the various metallic assembly elements 8, 9, l0, and 11 and even to make these of a non-magnetic material such as stainless steel.
  • the hull thus constructed offers numerous advantages over those hitherto existing, and in particular, as follows:
  • the invention is not limited to its methods of utilization or to the methods of constructing its various parts, but on the contrary it covers all variants thereof as defined in the appended claims.
  • a ship hull comprising a plurality of longitudinally spaced transverse frames; a first continuous skin means positioned externally of said frames and enclosing the same, a plurality of longitudinally extending spaced ribs extending along the external surface of said first skin means, fastener means extending through said first skin means for securing said ribs to said frames, a second continuous skin means positioned externally of said ribs and enclosing same in spaced relationship to said first skin means to form an outer covering for the hull, a plurality of generally transversely extending longitudinally spaced bulkheads interposed between adjacent ones of said ribs and between said first and second skins so as to divide each of the spaces therebetween into compartments, and cellular material filling said compartments.
  • each of the two skin means comprises a first wall of longitudinal, juxtaposed elements transversely spliced one to the next, and at least two other thinner walls of intercrossed diagonals.
  • each skin means has a thickness remaining the same throughout its extent, the transverse spacing measured normal to the surfaces between the successive ribs being substantially the same between all said ribs, said spacing being substantially equal to the width of one rib at the bottom of the hull, the height of each rib as measured in its transverse dimension perpendicular to the adjacent surfaces of the skin means becoming proportionately smaller as the ribs approach the waterline.
  • a hull according to claim 1 comprising first assembly elements mounting said ribs on said first skin means on the outer surface thereof, said assembly elements extending through said ribs from the outside thereof and having heads which lie flush in said ribs and second assembly elements mounting said second skin means on said ribs, said second assembly elements extending from the outside of the second skin means and being out of contact with the first assembly elements.
  • a hull according to claim 5, wherein said assembly elements are fasteners of stainless steel.
  • a method of assembling the hull of a ship comprising the steps of; positioning a plurality of transversely extending frames in a longitudinally spaced array, mounting a first continuous skin assembly externally on said frames, positioning a plurality of longitudinally extending transversely spaced ribs on the outer surface of said first skin assembly, fastening said ribs to said frames, positioning a plurality of generally transversely extending longitudinally spaced bulkheads between adjacent ones of said ribs so as to form closed spaces, filling said closed spaces with a cellular insulating material, and mounting a second continuous skin assembly on the outer surfaces of said ribs in spaced relationship to said first skin assembly so as to form a hull having a plurality of insulated compartments.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Laminated Bodies (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Moulding By Coating Moulds (AREA)
US49865A 1969-06-25 1970-06-25 Hulls of the ships and their methods of construction Expired - Lifetime US3670683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6921218A FR2050783A5 (nl) 1969-06-25 1969-06-25

Publications (1)

Publication Number Publication Date
US3670683A true US3670683A (en) 1972-06-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US49865A Expired - Lifetime US3670683A (en) 1969-06-25 1970-06-25 Hulls of the ships and their methods of construction

Country Status (5)

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US (1) US3670683A (nl)
DE (1) DE2030261C3 (nl)
FR (1) FR2050783A5 (nl)
GB (1) GB1318636A (nl)
NL (1) NL170252C (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676080A (en) * 1996-05-15 1997-10-14 Quintrex Australia Pty Ltd. Watercraft
US20070001343A1 (en) * 2002-08-12 2007-01-04 Valspar Sourcing, Inc. Blush-resistant marine gel coat composition

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1403037B1 (it) * 2010-11-25 2013-09-27 Falegnameria Tradizionale Di Marco Olivieri Struttura multistrato e procedimento per la sua realizzazione
CN103057660A (zh) * 2013-01-04 2013-04-24 太仓锦阳宝船建造有限公司 一种船壳板复合关节

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1885198A (en) * 1930-06-28 1932-11-01 Hale Marine Corp Hull structure
US2310765A (en) * 1937-12-11 1943-02-09 Dornier Claude Aircraft structure
US2384966A (en) * 1945-01-13 1945-09-18 Forrest D Rowland Composite boat construction
US2397049A (en) * 1944-01-10 1946-03-19 Sandison Alexander Gre Seymour Boat construction
US2743465A (en) * 1953-12-09 1956-05-01 Vogel Dick Boat and method of making same
US2816298A (en) * 1954-11-12 1957-12-17 Joseph F Foster Boat construction
US3007208A (en) * 1959-03-31 1961-11-07 B B Chem Co Methods of applying resin foam
US3093847A (en) * 1961-09-07 1963-06-18 William V Strecker Reinforced fiber glass structure
US3339778A (en) * 1963-04-24 1967-09-05 Chantiers De La Seine Maritime Insulated tank for liquids at low temperatures
US3538878A (en) * 1968-10-30 1970-11-10 Solomon Zalman Apparatus for making a ship unsinkable

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1885198A (en) * 1930-06-28 1932-11-01 Hale Marine Corp Hull structure
US2310765A (en) * 1937-12-11 1943-02-09 Dornier Claude Aircraft structure
US2397049A (en) * 1944-01-10 1946-03-19 Sandison Alexander Gre Seymour Boat construction
US2384966A (en) * 1945-01-13 1945-09-18 Forrest D Rowland Composite boat construction
US2743465A (en) * 1953-12-09 1956-05-01 Vogel Dick Boat and method of making same
US2816298A (en) * 1954-11-12 1957-12-17 Joseph F Foster Boat construction
US3007208A (en) * 1959-03-31 1961-11-07 B B Chem Co Methods of applying resin foam
US3093847A (en) * 1961-09-07 1963-06-18 William V Strecker Reinforced fiber glass structure
US3339778A (en) * 1963-04-24 1967-09-05 Chantiers De La Seine Maritime Insulated tank for liquids at low temperatures
US3538878A (en) * 1968-10-30 1970-11-10 Solomon Zalman Apparatus for making a ship unsinkable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676080A (en) * 1996-05-15 1997-10-14 Quintrex Australia Pty Ltd. Watercraft
US20070001343A1 (en) * 2002-08-12 2007-01-04 Valspar Sourcing, Inc. Blush-resistant marine gel coat composition

Also Published As

Publication number Publication date
NL7009329A (nl) 1970-12-29
DE2030261C3 (de) 1980-03-27
NL170252C (nl) 1982-10-18
DE2030261A1 (de) 1971-03-18
DE2030261B2 (de) 1979-07-26
GB1318636A (en) 1973-05-31
FR2050783A5 (nl) 1971-04-02

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