US1131429A - Construction of ships. - Google Patents

Description

A. E. SCOTT.

CONSTRUCTION OF SHIPS.

APPLICATION FILED 41m. 6, 1914.

Patented Mar. 9, 1915.

2 SHEBTSSHEET 1.

THE NORRIS PETERS CO" PHOTO-LlTHO-, WASHINGTON, D. C.

A. E. SCOTT.

CONSTRUCTION OF SHIPS.

APPLICATION FILED AUG. 6, 1914.

Patented Mar. 9, 1915.

2 SHEETS-SHEET 2 THE NORRIS PETERS CO. PHOYD-LITHO-I WASHINGIDN, D- C.

pnrrnn snares PATENT CONSTRUCTION OF SHIPS.

memes.

Specification of Letters Patent.

Patented Mar. 9, 1915.

Application filed August 6, 1914. Serial No. 855,376.

To all whom it may concern:

Be it known that I, ARGHIBALD EDWARD Soon, a subject of the King of Great Britain and Ireland, residing at est Hampstead, in the county of Middlesex, England, have invented Improvements Relating to the Construction of Ships, of which the following is a specification.

he present invention relates to improved constructions of bulkheads, an object being to obtain in a simple manner increasing strength from top to bottom in correspondence with the pressure head of fluid the bulkheads may have to resist.

According to this invention each bulkhead is built up of a number of curved trough shaped plates the troughs of which are shallow at one end and deep at the other relatively to the width, which plates are secured together in a water-tight manner by riveting or otherwise to form a bulkhead. The plates may be riveted together so as to present to the one side alternate convex and concave portions or so that all the plates present their concave portions to the one side and their convex portions to the other.

To form a bulkhead, the curved plates are arranged with their deeply curved portions toward the bottom and their shallow curved portions toward the top so that the strength will increase from topto bottom in correspondence with the pressure head of fluid the bulkhead may have to resist. The deep curves at bottom make a broad base for the bulkhead and the rivets fastening it are consequently subjected only to shear strain and lifting strain is avoided; while the serpentine line of these base rivets eliminate the danger which, in a flat bulkhead of usual construction, arises from the straight line of close rivet holes perforating and cutting across the ship. The bulkhead will practically conform to the section of the ship but any space between the outer trough shaped plates and the hull will be filled by suitably shaped plates of the required strength.

The top and bottom of the bulkhead may be attached to the deck and tank top by lengths of bar of suitable section of wrought or cast metal conforming to the concave or convex portions of the bulkhead and the required height of bulkhead may be obtained by riveting together two or more lengths of trough shaped plates.

The invention is specially applicable for collision bulkheads, the trough shaped plates being made with narrow deep curves at the bottom and wide shallow curves at the top so that a given number of plates will approximate in breadth to the section of the ship at any depth.

Bulkheads according to this invention may advantageously be employed either as transverse or athwartship, or as longitudinal or fore-and-aft bulkheads.

In the accompanying drawings, Figure 1 is a front elevation of half a midship bulkhead, Fig. 2 a transverse section, and Fig. 3 a section at the base or level of the junction with the tank top. Figs. 4, 5 and 6 are similar views of a collision bulkheac In both of the constructions shown, the plating of the bulkhead is composed of plates 1 riveted together so as to present to the one side alternate convex and concave portions, and arranged with their deep portions 2 indicated by full lines in Figs. 8 and 6 toward the bottom, and their shallow portions 3, indicated by broken lines in these figures, toward the top of the bulkhead.

The bulkhead is attached at its top and bottom respectively to the deck 4 and tank top 5 by lengths of angle iron or other metal 6, 7 conforming to the concavities of the end portions 2 and 3 of the troughs.

In preparing the plates for the midship bulkhead shown in Figs. 1 to 3 from flat plates, the plates are out so as to be some what narrower at the top than at the bottom, so that when bent into trough shape the curves are of greater depth at the bottom than at the top, and so that the sides of the bulkhead built up from a number of similar plates will practically conform to the midship section of the ship as shown. In the case of the collision bulkhead shown in Figs. 4 to 6, where the side walls of the ship diverge from below upward, the plates 1 may be wider at the top than at the bottom and formed into troughs the curves of which are of less depth at the top than at the bottom, the sides of the bulkhead still practically conforming to the section of the ship. The contour of the bulkhead at the levels 9, 10, 11 of Fig. t is indicated by correspond ing broken curved lines 9, 10, 11, in Fig. 6.

In the constructions heretofore usual, the tank does not extend forward beyond the collision bulkhead; in the case of a collision bulkhead constructed as shown in Figs. 4 to 6, however, the top plating 5 of the tank may advantageously be extended one or more frame spaces forward of the tank end 8, as shown at 5 to form a specially strong support for the bulkhead.

What I claim is 1. A bulkhead of zig-zag, angled or corrugated section built up of a number of Y trough shaped plates the troughs or curves of Which are shallow at one end and deep at the other relatively to the Width, Which platesare secured together in a Watertight .manner by riveting or otherwise.

2. A bulkhead of zig-zag, angled or corrugated section built up from a number of plates of decreasing Width from one end to the other, the said plates being formed into 15,

ARGHIBALD EDWARD scoTT.

Witnesses LEROY 'lVEBER, FRED MIDDLETON.

Copies of this patent may be obtained for five cents each, by addressing the Com mlssioner of Patents,

Washington, D. O. Y

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