US2381631A - Boat construction - Google Patents

Description

Aug- 7, 1945 E. H. WARING BOAT CONSTRUCTION Filed May 22, 1944 /NVENTOR A TOR 'E Eug/Ene .-H. Wal-."l'nc/ Patented Aug. 7, 1945 UNITED STATI-:s PATENT OFFICE Western Plastics, Incorporated, Glenda! e, Calif.,

a corporation of California Application May 22, 1944, Serial No. 536,665

8 Claims. (Cl. 9-6) My invention relates to boat construction and has for one of its objects the provision of a boat incorporating a novel gunnel construction.

Another object is the provision of a boat embodying novel means providing added buoyancy at and adjacent the gunnels to prevent tipping,

It is also an object of my invention to provide a boat having unusual resiliency in its gunnel portions to render it capable of withstanding blows and abuse which would seriously damage a boat otherwise constructed.

My invention involves oth'er features of novelty and utility, the nature of which will vbecome obvious from the following detailed explanation of a presently preferred embodiment, for the pur- Doses of which explanation I shall refer to the accompanying drawing, in which:

Fig. 1 is atop plan view;

Fig. 2 is a cross section on line 2--2 of Fig, 1, but showing a fragmentary portion of the mold upon which the boat is formed; and

Fig. 3 is an enlarged fragmentary section of a gunnel portion.

In the drawing I show my boat as comprising sides 5 which converge at the bottom 6, a false bottom l being provided. The gunnel portions I are provided with sponsons I I as will be described.

I prefer to form the sides of woven fabric sheets impregnated with a substantially waterproof plastic solution such as cellulose in a volatile solvent solution, or of any of the well-known synthetic resin plastic solutions. I prefer to use a thermoplastic material because of its resiliency and lack of brittleness.

Typically, I may use bur-lap sheets I-2II, each of which is impregnated, before being laid, with a. volatile solution containing about 13 by weight of ethyl cellulose and suitable solvents and diluents such as ethyl acetate, isopropyl alcohol, toluene and benzene, each ofthe sheets being dipped in the solution before its application so that it becomes thoroughly impregnated.

In forming the boat I first place the impregnated sheet I5 on the mold, fragmentarily shown at M, and after allowing the sheet to preliminarily cure until most of its solvents are released, I

additionally brush coat its outer surface with some of the solution and superimpose thereon the next successive impregnated sheet I6, which is likewise allowed to cure and is brush coated, after which the third impregnated sheet I1 is applied and allowed to cure.

The top edges of the sheets I5--I 1 terminate in staggered relation as shown at I5a, ISa, I'Ia, said edge portions being curved outwardly and formed `upon a tube 30. The tube is preferably of a waterproof plastic such as a vinylidene chloride resin known under the trade mark Saran." The tube may be initially retained in place by any suitable anchorage or support and is filled with a buoyant material 3l. I prefer to use as the material 3l a waterproof plastic such as styrene foam, a. product made by Dow Chemical Company.

I then apply the next impregnated sheet I8 after brush coating the lower portion of the last applied sheet Il with the cellulosic solution. The sheet I8 adheres to the last applied sheet I'I at its lower portion but diverges therefrom adjacent its top edge, being there curved about the tube 30 to terminate in contact with the upper edge of sheet Il, being adhered to the tube with a suitable adhesive such as a coating of the cellulosic solution. The somewhat triangular space between the upper portions of sheets Il and I8 is filled by a like waterproof buoyant material 3i preformed to fit the space. Where styrene foam is used as the filling 35, its outer surface is first coated with a hydrophylic colloid such as th'iokol or urea or phenolic resin to render it impervious to the solvents contained in the cellulosic solution with which the sheet I8 is impregnated.

Next, the impregnated sheet I8 is applied and allowed to cure as before described, after which it is brush' coated with the cellulose solution and then the outer impregnated sheet 20 is applied and cured, after which a gunnel cover strip I0 is applied. Preferably, strip 40 is of a woven fabric such as cotton batting, having a relatively smoother iinish than burlap, and is impregnated and bonded to the sheets I5 and 20 with tire same cellulosic solution.

The top ends of the sheets I! and 2l preferably overlap the adjacent ends of sheets I6 and Il to provide an effective water-tight seal.

While I have described only six laminae, IB-ZO, it will be understood, of course. that any desired number of laminae may be employed to build up the boat to any desired section or thickness; and likewise the gunnel cover strip may be composed of a plurality of laminae. Also, the tube 30 may be composed of laminae of the same material as that of which the laminae I5-20 are composed, if desired.

A boat constructed in accordance with my invention possesses relatively great buoyancy above the water line so that it may not be easily tipped; the novel sponsons provide semi-circular gunnels of considerable diameter, so that the gunnels will not present any sharp edges; and since the sponsons are highly resilient. they will yield to blows instead of being punctured thereby.

I claim: y

1. In a boat comprised of laminations forming the sides thereof, a buoyant tube interposed between and housed by the laminations at the gunnel -portions thereof, said tubes holding the laminations apart at and adjacent the gunnel portions to provide a space of substantially triangular cross section therebelow, and a filling of buoyant material in said space.

2. A boat comprised oi.' superimposed sheets impregnated and bonded together with an adhesive plastic, said sheets forming the sides ot the boat, and a buoyant tube interposed between the sheets at each of the gunnel portions and spacing the sheets apart to provide a sponson associated with each gunnel portion.

3. A boat comprised of superimposed sheets impregnated and bonded together with an adhesive plastic, said sheets forming the sides of the boat, and a buoyant tube interposed between the sheets at each of the gunnel portions and spacing the sheets apart to provide a sponson associated with each gunnel portion, and a illling of buoyant material between the spaced portions of the sheets.

4. A boat comprised of superimposed sheets impregnated and bonded together with an adhesive plastic, said sheets forming the sides of the boat, and a tube interposed between the sheets at each of the gunnel portions and spacing the sheets apart to provide a sponson associated with each gunnel portion, and a filling of buoyant material in the tube and between the spaced portions of the sheets.

5. A boat comprised of superimposed sheets impregnated and bonded together with a resilient adhesive plastic. said sheets forming the sides of the boat, a tube of resilient material interposed between the sheets along each of the gunnel portions thereoi', the top edge portions of the sheets being curved about said tubes.

6. A boat comprised of superimposed sheets of fabric impregnated and bonded together with a resilient thermoplastic adhesive, said sheets forming the sides oi the boat and providing a gunnel portion along each top edge, and a tube composed of resilient material interposed between the sheets along each oi' the gunnei portions, the top edge portions of the sheets being curved about and adhered to the tubes whereby the tubes provide resilient foundations for the respective gunnel portions of the sheets.

7. A boat comprised of superimposed sheets impregnated and bonded together with a resilient adhesive plastic, said sheets forming the sides of the boat. a tube of resilient material interposed between the sheets along each oi the gunnel portions thereoi. the top edge portions of the sheets being curved about said tubes, and a plastic impregnated fabric sheet bonded to each gunnel portion in covering relation to the top edges of the sheets.

8. A boat comprised of superimposed sheets impregnated and bonded together with an adhesive plastic, said sheets forming the sides of the boat. and a buoyant tube interposed between the sheets at each of the gunnel portions and spacing the sheets apart to provide a sponson associated with u 'tionship at their top edges about said respective tubes.

EUGENE H. WARING.

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