US242359A - Half to john faeeell - Google Patents

Description

y {No Model.) 4Sheets-Sheet 1T R. G. NUGBNT. Machine fdr-Bending Metal Articles/ Patented May 31,1881.

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Machine for Bending Metal Articles;

No.. 242,359. Patented May 31,1881.

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. R. O. NUGENT. Machine for Bending Metal Artiolesn No 242,359. Patented May 31,1881.

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, R. G. NUGBNT.

Machin efo'r Bending Metal Articles. No. 242,359. Patented May 31,1881.

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Unrrnn STATE PATENT OFFICE.

RICHARD O. NUGENT, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO JOHN FARRELL, OF SAME PLACE.

MACHINE FOR BENDING METAL ARTICLES.

SPECIFICATION forming part of Letters Patent No. 242,359, dated May 31, 1881.

Application filed February 12, 1881. (No model.)

To all whom it may concern Be it known that I, RICHARD G. N UGENT, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Machines for Bending Sheet-Metal Articles; and I do hereby declare that the following is a full and exact description thereof, reference being bad to the accom'panyin g drawings, and to the letters of reference marked thereon.

My invention relates to an improvement in machinesfor bending sheet-metal articles; and it consists in a series of couiform rolls journaled in arms attached to segments furnished with r 5 gear-teeth adapted to mesh with the screwthreads of worm wheels, (commonly called endless screwj) said segments adapted to move in the arc of a circle and in adjustable guides arranged on arevolvingtable, the whole so arranged and operating that a circular disk of sheet metal placed between pairs of said rolls will be gradually bent to the form desired, as will hereinafter more fully appear.

To enable others skilled in the art with which 2 5 my invention is most nearly connected to make and use it, I will proceed to describe its construction and operation. 7

In the accompanying drawings, which form part of my specification, Figure 1 is a top View or plan of my improvement in machine for bending sheet-metal articles. Fig. 2 is a side elevation of the same. Figs. 3, 4, 5, 6, and 7 are detailed sections of the several parts of said machine. Fig. 8 represents a circular 3 5 disk of sheet metal and a vertical section of a vessel formed therefrom by said machine.

In the accompanying drawings similar letters of reference refer to same parts in the several figures of said drawings.

0 Arepresents the frame of the machine, which frame consists of a circular base, B, and arch O, the former furnished with gear-teeth, which mesh with the teeth of bevel-wheels D, the axes a of which are journalcd in hangers b, so

cured to the under side of a revolving table, E, which is journaled upon a hollow stand, F, projectingnpward from the center of the circular base B, with the periphery of said revolving table fitted to recesses in the arch 0,

as indicated atc.

0n the under side of the revolving table E are gear-teeth d, which mesh with the teeth of the driving-wheel G, the axes e of which are journaled in the arch O.

()n the upper side of the revolving table E are adjustable guides H for the segments I, to which the coniform rolls J and K arejournaled. The adjustable guides H move in slotsfin the revolvingztable E, and are secured in the position desired by means of bolts g, as shown in Fig. 4.

To the upper side of the revolving table are also secured uprights L, in the upper end, h, of which are screws M, which are connected to the guides H for adjusting them with relation to the axis of the revolving table E.

To the segments I are hinged, at 'i, arms N, in which the coniform rolls K are journaled. These arms are held in a fixed position with relation to the segments I by means of keysj. The rolls J are also journaled in arms 0, which are secured to the segments 1, as shown in Figs. 1, 5, and 6. The rolls Jand K are made tapering, so that throughout their entire action will be uniform on the disk of metal they are caused to act upon. Therefore the taper of said rolls must be in proportion to the distance of travel of the different parts of said rolls. The skillful mechanic will readily understand this when it is stated he must ascer- 8o tain the difi'erence of travel between the greatest and smallest diameter of said rolls and make the angle of taper accordingly.

In arch (J, at It, is an adjustable holding de vice, P, the axis of which is concentric with the axis of the revolving table E. The lower end,

1, of the holding device P must be made in form corresponding to that portion of the article which is directly under it. For example, in Fig. 1 the dotted lines m represeutaformed o kettle, such as is shown in vertical section in "Fig. 8. Therefore the lower end, I, of the holding device P is made to conform to the contour of the bottom of said kettle, which is shown in vertical section in Fig. 8. The part is of the 9 5 arch O is furnished with screw-threads corresponding to the screw-threads on the holding device P, the former serving as a screw-nut for the latter.

In the hollow stand F is placed a screw, Q,

on the upper end of which is a disk, n. This screw Q is furnished with a screw-nut, i", having arms 8 for operating it. The screw-nut 1" is rotated on the upper end of the hollow stand F, and is used for the purpose of elevating the screw Q and causing it to press the sheet metal from/which the article is formed against the part I of the holding device 1?.

The axes a of'the wheels D are furnished with worm-wheels or endless screws It, the threads of which mesh into the gear-teeth ton the segments 1. The bearings of the axes a should be so constructed and arranged that the bevel-wheels D can be thrown into and out of gear with gear-teeth a on the upper surface of the base B.-

The skillful mechanic will, from the foregoing description and by reference to the accompanying drawings, readily understand the construction and arrangement of the several parts of the machine hereinbefore described and the relation that said parts bear to each other. I will therefore proceed to describe the operation of said machine, which is as follows: The operatorcuts a circular disk, such as shown in Fig. 8, from a sheet of copper, (if he desires to make a copper kettle,) and places said disk concentric on the disk n, and between the coniform rolls J and K, the axes of which are at this time on a horizontal plane. The operator then, by means of a screw-nut, r, elevates the screw F, and its disk a will force the disk of sheet-copper up against the end I of the holding device P. The wheels Gr, being revolved by power applied to their shafts y, will revolve the table E, which carrying around with it the hanger b and axes Ct of the wheels D,the gearteeth of which mesh with the gear-teeth a on the upper face of the base 13, the wheels D will be revolved, thereby revolving the axes a and worm-wheels R, which, meshing with the gear-teeth t of the segments I, will cause them to travel up in their guides. H, carrying upward the outer ends of the coniform rolls J and K, which, during their upward movement, will be revolved by their frictional action on the copper plate placed between them. The coniform rolls J and K, by traveling over the surface of the copper plate, (which is held stationary,) while being gradually moved up into the position shown in Fig. 1, prevent all warping or wrinkling of the plate in the operation of bending it to the form desired. When the plates, two or more pairs of coniform rolls,

means for revolving them on their axes and around the axis of the plate between them, and means for elevating their outer ends from a horizontal plane toward a vertical plane,

substantially as herein described, and for the purpose set forth.

2. In a machine for bending sheet-metal plates, one or more pairs of coniform rolls and their bearings, a revolving table having guides in which the bearings of said rolls move, and means for operating said parts, substantially as herein described, and for the purpose set forth.

3. In a machine for bending sheet-metal plates, one or more pairs of coniform rolls and their bearings, a revolving table having adjustable guides in which the bearings of said rolls move, and means for operating said parts, substantially as herein described, and for the purpose set forth.

4.. The combination of the coniform rolls J and K, segments I, adjustable guides H, revolving table E, holding device 1?, screw F, and operating mechanism, substantially. as herein described, and for the purpose set forth.

5. The base B, having gear-teeth u, revolvin g table E, having gear-teeth 01, wheels G D, worm'wh eel R, and their shafts, in combination with the segment I, adjustable guides H, coniform rolls J K, holding device P, and screw F, constructed, arranged, and operating substantially as herein described, and for the purpose set forth.

6. The coniform roll K, journaled in arm N, hinged to the segment I, in combination with the coniform roll J,journaled in arm 0, at-

tached to said segment, substantially as herein too described, and for the purpose set forth.

R. U. NUGENT.

Witnesses A. G. JOHNSTON, .I. J. JOHNSTON.

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