US116647A

US116647A - Improvement in methods of drawing patterns for flaring vessels

Info

Publication number: US116647A
Authority: US
Publication date: 1871-07-04
Anticipated expiration: 1888-07-04

Description

4b. Fil/zdffzhzrg: awz'nyPaZZr/zf far lz! .11d ZZ PATEmn J U1. 41871 v @Hummm UNITED STATES ORLANDO B. VANDENBURG, OF FINDLAY, OHIO.

IMPROVEMENT IN METHODS OF DRAWING PATTERNS FOR FLARING VESSELS.

Specication forming part of Letters Patent No. 116,647, dated July 4, 1871.

To all whom it may concern:

Be it known that I, ORLANDO B. VANDEN- BURG, of Findlay, in the county of Hancock and State of Ohio,have invented a new and Improved Method of Drawing Patterns i'or Cutting' Sheet Metal; and I do hereby declare that the following is a full, clear, and exact description thereof7 which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this speciiication, in which the diagram illustrates my improved method ot' drzuving patterns.

The object of the present invention is to pro Vide a convenient and reliable system of laying' out on sheet metal the necessary lines so that the metal can be cut to be bent into truncated cones.

The follo\\'i11g is the description of my method: The height of the conc irst measured on a line a b, the extremities ot' which meet, at right anglee, the lines c d and cf. The Iine c d is equal in length to the long, and the line c fto the short, diameter of the cone. Both the last-named lilies are bisected by a. b. Lines are next drawn through the points c c and l f, so that the point g is found. An cquilateral triangle, cf l1, is erected on the line cf, and a semicirclc, e if, described from the center b. The sides l@ j' and lL e of the triangle are extended until they meet a tangent,

j i lr, of the circle e if, the said tangent being at right angles to the line a b. The length j k thus found is next, by perpendiculars j l and k m, transferred to the tangent l 'In of a circle, An o, which is described from the point g and radius g e, said tangent m being parallel to j k. On the diameter n o I next erect an equilateral triangle, n 0 p, from the point p of which I draw lines to the points l and m, cutting the circle n o at yr and s. From the point g and radius g c I next describe the outer circle tu. The radiuses yr c and s fw of this circle7 through the points 1' and s, produce between the two circles a o and t u just one-half the desired length ot' sheet. By addin g another length, as far as n and the entire sheet a s Iw t is produced, to the ends of which suiiicient material for overlapping may he added.

Having thus described my invention7 I claim as new and desire to secure by Letters Patent- The method of drawing patterns for cutting sheet metal, substantially as herein shown and described.

ORLANDO Il. VANDIJNBURG.

Vitnesses:

E. T. DUNN, D. B. BEARDSLEY.