US46147A

US46147A - Improved rudder with corrugated surfaces

Info

Publication number: US46147A
Authority: US
Publication date: 1865-01-31
Anticipated expiration: 1882-01-31

Description

UNITED STATES dPATENT OFFICE.

sAMUEL J. sEELY, oE'NE'w YORK, N. Y.

Specification forming part of Letters Patent No. 46, [47, dated January 31, 1865.

.T0 a/ZZ whom it may concern:

Beit known that I, SAMUEL J. SEELY, of the city, county, and State of New York, have invented a new and useful Improvement in Rndders, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a side view of a rudder having one modification of my improvement attached. Fig. 2 is a section through the line :t w of Fig. 4. Fig. 3 is a back view of Vthe rudder, and Fig. 4L is a side view of a rudder with its corrugations at an angle different from those shown in Fig 1.

It is the object of my invention to give to rudders an increased area of surface without increasing their dimensions, and such a form as to secure the greatest resistance within any given area of resistingsurface; and to this end my invention consists in corrugating the sides of the rudder, and in placing these corrugations in any relation to or at any desired angle to the rudder-stock which experience may demonstrate will give the greatest resistance to the varied currents through which ships may navigate.

To enable others skilled in the art to make and use Iny invention, I will proceed' to describe its construction and operation.

l build my rudder in any of the approved modes, and usually of wood, the parts being united in the most approved manner to secure the utmost strength of the materials and of any desired form of outline. The sides ofthe blade are corrugated from the stock to the heel with parallel corrugations A, to increase the area ot' the bearing-surface against whch the water is to exert its pressure, and these corrugations may be placed at any angle desired to the stock of the rudder, although those shown in Figs. l and 2 will, it is be, lieved, be found effectual. These corrugations may be made of any size suitable to the proper thickness of the rudder. After the eorrugations are formed of the size and in the directions desired on the wooden surfaces of the sides of the blade of the rudder, (care being taken to so form them that their projections and depressionsshall truly register, as shown at B, Fig- 3,) the whole surface may be sheathed with any desired sheet metal, 'and this sheathing may be securely fastened by nails or throughbolts c, which willfelamp and hold securely in place the metal sheathing and cause it to cover neatly and smoothly in every part all the corrugations over the whole surface of the blade, when the sides of the rudder will have the appearance shown in Figs. l and 4. After the sides have received their sheathing the back edge of the rudder mayalso be covered with copper or other sheet metal, as shown in Fig. 3, and securely fastened by the ordinary sheathingnails. The rudder-stock may also be similarly sheathed.

My invention, it is obvious, may be applied at little cost to any ofthe known forms ot' rudders now in use by forming the corrugationson their sides, either by fastening a series of ribs of the proper curvature thereto in the proper angle and sheathing them properly, or by sinking proper grooves therein at the angle desired and sheathingl the parts, as

hereinbefore described. It is likewise obvious that the corrugations may be made perpendicularly on the blade or parallel to the rudder-stock, and that rudders entirely ot' metal may be made in the form desired. For smaller craft a single corrugated sheet may used. Vhen metal alone is used, I prefer to have two sheets to form the blade, and interpose cork or some equivalent buoyantmaterial between them, and secure the blade on a tubular stock likewise filled with buoyant material. The corrugations, moreover, may be made in curved or wave lines on the blade without departing from the spirit of my invention.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is-f Gorrugating the sides of the blade of rud ders, substantially in the manner and for the purpose set forth.

In testimony whereof I have hereunto subscribed my naine.

SAML. J. SEELY.

Witnesses WM. D. BALDWIN, EDM. F. BROWN.