US3103019A

US3103019A - Method of fabricating a hull and the product hull

Info

Publication number: US3103019A
Application number: US122121A
Authority: US
Inventors: Freire Edward
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-07-06
Filing date: 1961-07-06
Publication date: 1963-09-10
Anticipated expiration: 1980-09-10

Description

p 1963 E. FREIRE 3,103,019

METHOD OF FABRICATING A HULL AND THE PRODUCT HULL Filed, July 6, 1961 a o c 0 a o 0 o o n I o 0 a c w a I IN VEN TOR. E D W4 ED FRI-72E {WM-M United States Patent 3,103,019 METHOD OF FABRICATING A HULL AND THE PRODUCT HULL Edward Freire, Firdale St, Centereach, N.Y. Filed July 6, 1961, Ser. No. 122,121 7 Claims. (Ci. 9-6) This invention relates generally to small craft hulls and more particularly to a novel substantially unsinkable small craft hull and to the method of fabricating the novel hull.

Heretofore, small craft have been modified with extraneous means to introduce the unsinicable factor. Such extraneous means comprised flotation chambers or air tight cells that supported the craft in water in the event of accident or capsizing. The present invention produces a small craft having an inherent buoyancy that results from the novel method of fabrication and from the structure of the craft per se. More important, the relative cost of manufacture of a small craft having the safety unsinkable feature varies with basic material and shape of the hull. Fiber or plastic hulls require molds that are expensive and subsequently increase the selling price of the craft. Conventional wood or metal hulls require a relatively considerable amount of skilled labor to assemble the basic wood or metal elements into the finished hull. The present invention eliminates the mold requirement and reduces the assembly labor to a heretofore unobtainable minimum, thus substantially reducing the cost of manufacture.

One of the principal objects of the invention resides in the novel inexpensive method of fabricating a small craft hull.

Still another object of the invention is to provide a method of fabricating a small craft hull with simplified steps that can be readily performed by persons not skilled in the boat building ar-t.

Another object is to provide a novel method of fabrieating the novel hull wherein the basic components can be preformed and sold in kit form for assembly by the purchaser.

Yet another object is to provide a hull having relatively high resistance to damage or shape distortion resulting from excessive temperature, excessive loads, or accidental impacts.

A further object of the invention is to provide a basic hull that is readily adaptable to sail and/ or engine power.

Other ancillary objects will be in part hereinafter pointed out and will be in part hereinafter apparent.

In the drawings:

FIGURE 1 is a plan elevation of an assembled hull.

FIGURE 2 is a longitudinal cross-sectioned view taken along line 2-2 of FIGURE 1.

FIGURE 3 is a front elevation of the hull.

FIGURE 4 is a rear elevation of the hull.

FIGURE 5 is a transverse cross-sectioned view taken along line 55 of FIGURE 1.

FIGURE 6 is an isometric projection of the longitudinal spacer member.

FIGURE 7 is a partially cut-away side elevation of the spacer member being inserted between the hull forming sheets.

Referring to the drawing in detail, 1% generally designates the assembled basic hull. Hull 1i) comprises upper and

lower sheets

12 and 14, respectively, spacer member 16 land stern plank 18. Sheets 12 and lid are preferably formed of 1a marine-type plywood consisting of laminations of wood sheets bonded into predetermined thicknesses by waterproof glue or a similar binder. Marine plywood composition is well known to those skilled in the art and need not be described in detail herein.

ice

Briefly, the sheet 12 is preferably pre-cut as a unitary member with a rounded forward end portion such as designated 20* in FIGURE 1. The radius of portion 20 is predetermined and of such shape as to conform to the accepted conventional contour of the bow section of small pleasure craft. The end portion 20 could be formed in other shapes without departing from the scope and intent of the present invention. The sheet 14 is similarly formed with a contoured end portion 20 which is of such predetermined pattern to produce a matching contour when the

sheets

12 and 14 are united one to the other. As shown in the various figures of the drawing, sheets .12 and 14 are disposed one on the other wherein the peripheral edges of one sheet are aligned with the related peripheral edges of the other sheet. Prior to the mounting of one sheet on the other, a sealing compound 22 maybe applied on the adjoining surface of each sheet adjacent to the periphenal edges thereof.

The substantially

planar sheets

12 and 14 are then secured one to the other by fasteners 24 circumferentially disposed around the aligned sheets with the exception of the stern portion 26. Portion 26- is not fastened in this step of assembly for reasons hereinafter apparent.

Spacer member 16 comprises a longitudinal box-like structure having upper and

lower walls

28 and 30 respectively and

side walls

32 and 34 respectively. The outer peripheries of the upper and

lower walls

28 and 30 are transversely arcuate in shape for reasons hereinafter described. "Fhe forward end portions of the

walls

28, 30, 32, and 34 are pre-shaped to provide a reduced or tapered end portion as of the assembled spacer 16. Intermediate stitfeners or baffles 38 may be disposed in secured spaced relation within the box-like spacer 16 to further strengthen the members defining the

walls

28, 30, 32, and 34- and to provide compartments therein if so desired.

In fabricating the hull '11), FIGURE 7, preformed sheets 12 land 14 are partially bonded and secured one to the other, as hereinbefore described, with the stern defining portion 26 not bonded or fastened. The sheet 12 and the sheet I14 at portion 26 are then centrally separated apart one from the other and the tapered end 36 of spacer 16 is inserted between the separated sheets. Spacer 16 is urged forwandly between

sheets

12 and 14 to longitudinally separate and space the sheets 12 land 14 one from the other. The maximum separation is along the longitudinal axis of the sheets. The separation gradually reduces to substantially zero where the upper sheet 12 is fastened to the lower sheet 14 along the longitudinal edges and in the bow section 20. The stern plank-18, precut to shape, and peripherally coated with a sealing compound 22, is then inserted between the

sheets

12 and 14 adjacent to the stern portion 26 and fastened by means of fasteners 24. With stern plank 18 so assembled, the oavity formed by the

spaced sheets

12 and 14 is substantially sealed, thereby providing an air chamber.

It will be noted that the upper and

lower walls

28 and 30 of spacer 16 are aarcuate to conform to the contour of the

separated sheets

12 and 14. The inherent resiliency of sheets 1-2 and 14 when separated by spacer 16, secure said space in its longitudinal axial relation to the sheets 12 and '14.

The upper surface of sheet 12 now provides a deck area while the lower surface of sheet 14 forms the water contacting area of the hull. The substantially iarcuate lateral portions of sheet 14 disposed oppositely of the'spacer 16 form a planing or lifting surface for the hull 10 when said hull travels forwardly in water. The beam or width of the hull relative to the limited depth of the center section of the hull provides a high degree of stability and reduces to a minimum the tendency of the hull to capsize.

Extraneous equipment, such as rigging, motive means, and other conventional aids, may now be mounted on hull '10 in accordance with the desired application.

While but a single embodiment of the invention has been illustrated and described, it will be understood that many modifications and changes could be made without departing from the scope of the invention as set forth in the following claims.

The invention claimed is:

1. The method of fabricating a boat hull comprising the steps of positioning a pre-shaped fiat sheet of laminated wood on a matching pre-shaped fiat sheet of laminated wood in stacked edge aligning co-planar relation, sealing and securing plural portions of one sheet to matching plural portions of the other sheet adjacent to the aligning edges of the sheets, separating the unsecured central portions of the sheets one from the other, inserting a spacer member between the separated portions of the sheets, and sealing and securing closure means between the separated edges of the sheets to enclose said spacer member in a hollow sealed chamber.

2. The method of fabricating boat hull comprising the steps of positioning a pair of matching pre-shaped fiat laminated wood sheets one on the other in edge aligned relation, fastening a portion :of the sheets one to the other adjacent to the edges of said sheets, separating the unfastened portions of the sheets one from the other, inserting a spacer member between the separated sheets to form a hollow cavity and to maintain the unsecured portion of said sheets in separated spaced relation, positioning a preshaped wood plank between the separated sheets adjacent to the separated edges of said sheets, and fastening said sheets to said plank to substantially enclose the cavity formed by the separated portions of said sheets.

3. The method of fabricating a buoyant member, comprising the steps of positioning a pair of fiat elongated sheets of buoyant material one on the other in superimposed stacked edge aligning relation, fastening and securing a portion of the contacting peripheral edges of the sheets one to the other, separating the other portion of the contacting peripheral edges of the sheets one from the other to form a hollow cavity between the sheets, positioning spacer means between the separated sheets, and positioning means to enclose the cavity between the separated portion of the peripheral edges of the sheets, and securing said enclosing means to said sheets.

4. The method of fabricating a boat hull comprising the steps of positioning a pair of preashaped planar buoyant sheets in superimposed stacked edge aligned relation, securing a portion of one sheet to the corresponding portion of the other sheet adjacent to the edges of the sheets, separating the sheets one from the other at the unsecured edge portion, inserting spacer means between said sheets to form a hollow cavity between the sheets, and sealing the separated edge portion to substantially enclose the cavity.

5. The method of fabricating a boat hull, comprising the steps of positioning pro-shaped substantially planar sheets of buoyant material one on the other in contour aligned relation, each of said sheets having matching bow, stern, and side defining stacked edges, securing the sheets one to the other adjacent to the bow and side defining edges, separating the stern defining edges of the sheets one from the other, inserting spacer means between the separated sheets, positioning the spacer means centrally between and in parallel relation to the side defining edges, inserting a stern member between the separated stern defining edges of the sheets, and securing the stern member to said sheets.

6. A boat hull comprising a flat sheet of laminated wood having a predetermined peripheral shape, a second fiat sheet of laminated Wood having a similar predetermined peripheral shape superimposed in edge aligning relation on said first sheet, means securing the portions of the first sheet adjacent to the edges of said first sheet to matching edge portions of said second sheet, and means for spacing the unsecured portions of one sheet from the unsecured portions of the other sheet to form a hollow Watertight chamber between said first and second sheets.

7. A boat hull comprising a fiat sheet of laminated wood having substantially parallel side edges, a contoured forward edge and a linear rear edge, a second sheet of laminated wood having a shape similar to said first sheet and superimposed on said first sheet in stacked edge aligned relation, means securing the sheets one to the other in said stacked edge aligning relation, spaced means longitudinally disposed between the first and second sheet in equidistant spaced relation with the secured parallel side edges of the first and second sheet, said longitudinal spacer means substantially extending from the forward edges of the first and second sheet to the rear edges of the first and second sheet, and a stern member disposed between the first and second sheet adjacent to the rear edges of said first and second sheet to substantially enclose said spacer means in a hollow watertight chamber formed by the spaced first and second sheet and stern member.

References Cited in the file of this patent UNITED STATES PATENTS 2,379,883 Clement July 10, 1945 2,685,696 Oscanyan Aug. 10, 1954 2,956,292 Newsome Oct. 18, 1960

Claims

1. THE METHOD OF FABRICATING A BOAT HULL COMPRISING THE STEPS OF POSITIONING A PRE-SHAPED FLAT SHEET OF LAMINATED WOOD ON A MATCHING PRE-SHAPED FLAT SHEET OF LAMINATED WOOD IN STACKED EDGE ALIGNING CO-PLANAR RELATION, SEALING AND SECURING PLURAL PORTIONS OF ONE SHEET TO MATCHING PLURAL PORTIONS OF THE OTHER SHEET ADJACENT TO THE ALIGNING EDGES OF THE SHEETS, SEPARATING THE UNSECURED CENTRAL PORTIONS OF THE SHEETS ONE FROM THE OTHER, INSERTING A SPACER MEMBER BETWEEN THE SEPARATED PORTIONS OF THE SHEETS, AND SEALING AND SECURING CLOSURE MEANS BETWEEN THE SEPARATED EDGES OF THE SHEETS TO ENCLOSE SAID SPACER MEMBER IN A HOLLOW SEALED CHAMBER.