US2023047A

US2023047A - Tubular extruded shape

Info

Publication number: US2023047A
Application number: US671567A
Authority: US
Inventors: John E Ganoe
Original assignee: Aluminum Company of America
Current assignee: Howmet Aerospace Inc
Priority date: 1933-05-17
Filing date: 1933-05-17
Publication date: 1935-12-03
Anticipated expiration: 1952-12-03

Description

Dec. 3,1935. JVAE, 2,923,047

TUBULAR 'EXTRUDED SHAPE Filed May 17, 1933 Patented Dec. 1935 UNiTED; STATES.

"PATENT. Sort-ice,

TUBULAR EXTBUDED snare John a. Ganoc, New Kensington, Pa, assignor to.

Aluminum Company of America, Pa., a corporation of Pennsylvania Application M1111. 1933, Serial No. 671,567

4 Claims. (01. 156-14) This invention relates to improvements in tubular shapes of irregular cross section and par-- ticularly to improvements in such tubular shapes as are used for window and screen frames and 5 the like.

Difliculties encountered in obtaining uniformity frames, and the like, which are. more resistantv to deformation and of better appearance than previous shapes. A further object is the provision of such improved shapes which can be 20 readily produced by simple metal working operations. Other objects will be apparent from the following specification and the drawing in which;

Fig. 1 shows a shape as extruded and embodyscribed, and only lead to complicated tool con- 25 25 ing one-form of my invention;

Fig. 2 shows the extruded shape of Fig. 1 in its completed form; I

Fig. 3 shows a modification of my invention as extruded; 30 Fig.4 shows the extruded shape of Fig. 3 in its completed form.

. The shape shown as extruded infFlg. 1, and in its finished form in Fig. 2, is typical of the shapes used in the manufacture of screen frames. As ex 35 truded the shape consists essentially of a base portion I and a cantilevered portion 2 of angular shape provided with a depending leg 3, the base portion I being provided with an upstanding leg I, and a second'and longer upstanding leg 5. The

10 opening between legs 3 and 4 'isessential to provide support for the portionbftheextrusibn die extending interiorly of the base l-, cantilevered portionz and legs land 4.

- The particular section chosen for illustration is l5 adapted to provide a: supporting frame for a window screen or the like, the screen cloth being fixed in the groove partially formed by the leg 5 by some suitable fastening means.

The process of extrusion consists in forcing a i body of metal, usually heated, through a die of suitable cross-sectiomand the metal as extruded takes substantially the same form as the die opening. After the shape shown in Fig. 1 has been produced by this process the cantilevered portion 2 is folded down either by drawing the shape tubular form. The closing through a die or dies or in some other convenientmanner. The legs land I are thus brought into abutting relationship, forming a longitudinal seam along the tubular portion of the finished shape.

Previous shapes produced in this manner I have 5 had'the abutting faces of the legs fiator substantially fiat. When such shapes are closed it has-been found difiicult to obtain a structure in which the faces coincide exactly. This results in an irregular and non-uniform shape. To cor- 10 rect'this diificulty I provide the legs 3 and lwith a plurality of complementary inclined surfaces 6 and l, to insure positive alignment of the parts. Such surfaces can form a simple V, as illustrated in Figs. 1 and 2, or can have, a fiat portion 8, as

7 shown in Figs. 3 and 4, which while slightly difv -ferent in form are otherwise the same as the first two figures.

- I have found the shapes so formed besubstantially more resistant to deformation than shapes without such inclined complementary sur-' faces. While'more complex positioning means have been tried, they are no more effective for the Purpose than the simple structure shown and de ing a plurality of inclined plane complementary 40 surfaces.

2. An extruded metal shape for screen frames and the like, consisting of a hollow tubular portio'n having at least one substantially'flat side wall and another side wall of greater thickness substantially perpendicular thereto, an'integrally 1 .formed continuation of said fiat side wall extending beyond said perpendicular side wall and provided with a substantially perpendicular up standing leg which is substantially parallel with .the thicker side wall for at least a part of its length, the said thicker side wall of said tubular portion having a longitudinally extending seam formedby two parts abutting to form said wall,

each of said parts having a plurality of inclined plane surfaces engaging complementary inclined plane surfaces on the other of said parts.

3. An open extruded metal shape adapted to be drawn closed to form a hollow tubular memher, said shape in open form comprising separated adjacent portions provided with complementary inclined surfaces, and said inclined surfaces providing surface contacting aligning means for the adjacent portions when the shape is drawn closed. 4. In an open extruded metal shape adapted to be drawn closed to form a hollow tubular memher, a, seam comprising inclined surfaces formed onthe faces of adjacent separated portions of said open shape, said inclined surfaces being compleinentary in form and adapted to provide alignment of the separated portions on drawing the shape closed, said inclined surfaces providing only superposed surface bearing therebetween.

Jomi E. GANoE.