US180436A - Improvement in bending-machines - Google Patents

Description

' SSheets-Sheetl. C. A. SCOTT & M. SCHULTZ.

' BENDING-MAGHINE. No.180,436. Patented Aug.1,1876;

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3SheetsSheetZ. C. A. SCOTT & M. SCHULTZ.

BENDING-MAGHINE. No.180,436.

Patented Augnl, 1876.

N.PETEHS. FHOTO-UTHOGRAPHER. WASHINGTON. D. C.

SSheets-SheetS; 0. L SCOTT & "M. SCHULTZ.

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N. PETERS. FHDTWLITHOGRAPNER. WASHINGTON. D, Q

UNITED STATns PATENT Grrroa.

CHARLES A. SCOTT AND MICHAEL SCHULTZ, OF CINCINNATI, OHIO; SAID SCHULTZ ASSIGNOR TO SAID SCOTT.

IMPROVEMENT IN BENDINGJ' ACHINES.

Specification forming part of Letters Patent No. 180,436, dated August 1, 1876; application filed August 17, 1874.

To all whom it may concern Be it known that we, CHARLES A. Soorr and- MICHAEL SCHULTZ, of Cincinnati, Ohio, have invented an Improved Sheet-Metal-Bending Machine, of which the following is a speci- Thisjinvention is a special machine, adapted to bend the roofing-plates covered by patent of G. A. Scott, January 20, 1784,146,555; and consists, mainly, in certain details of construction, which will be fully described hereinafter.

In the drawings, Figure 1 represents a front elevation of our improved machine; Figs.2 and 4, vertical sectional elevations of the same Figs.3 and 6, Sheets 1 and 2, views ofthe eccentric sleeve or collar detached; Fig. 5, a front elevation of the bending-cylinders detached; Fig. 6, an exaggerated view representing the tapering form of the lower bending-surface; Fig. 7, a perspective view of a series of plates when bent and united to cover the roof; Fig. 8, a perspective view of the edge of a single plate properly bent; and Fig. 9, a similar sheet, showing a plate improperly bent.

To enable others skilled in the art to make and use our invention, we will now proceed to describe fully its construction and manner of operation. I

A represents any suitable frame-work or table adapted to strongly support the machine proper which'is attached thereto. B represents the cylinder forming the lower bendingsurface, which is rigidly secured to one end of-the table, in such position that its upper surface lies in the same plane as the table-surface, as

the ends of the fixed cylinder B, as shown in Fig. 5. 0 represents a frame consisting of the standards or arms 0 c, separated below to hold the ends of the upper bending-cylinder, but bent together and united above to form a common handle, 0 as shown in Fig. 1. 0 0 Fig. 5, representjournal-openings at the ends of the arms 0 c, which are adapted to inclose the journals 1) b of the fixed cylinder B. c 0 represent journal-openings, in which are held the eccentric collars of the upper cylinder. 0 represents a recess in the handle, and c a transverse shaft or pin adapted to hold the handle of the catch-lever, as will be hereinafter described. D D, Figs. 3, 5, and 6, represent eccentric collars, consisting of an inner portion, 01, adapted to turn in the journal-openings c and an outer portion, d of enlarged area, to which the handle F, for actuating the eccentric, is attached. d represents the journal-bearing for one end ofthe upper cylinder, this beingv located upon one side-of the center of the collar, as shown. E represents the cylinder which forms the upper bending-surface, which is provided with a convex surface corresponding with the depressed portion of the lower cylinder, and has also journals 6 0, adapted to rest in the corresponding bearings of the eccentric collar, as shown. F represents a bar properly bent to form a convenient handle, as shown, which is fastened at its ends to the outer portion d of the collar. G represents a lever, pivoted .in the recess of the handle,-which is provided at one end with an inclined face, g, and a catch, 9 adapted to hold the bar F, as shown. g represents a spring'of suitable construction secured at one end to the frame 0, and at the other to the handle of the catch-lever, by means of 4 which the latter is held in proper position to catch the bar when it is brought into contact with it. H represents a transverse bar, united at its ends to the edges of the standards of the frame (J, in front of the opening between the bending-cylinders, as shown. sent guide-stops, consisting of square sockets k h adapted to slide freely upon the bar, and depending arm 71. k adapted to arrest the movementofthe plateinserted between the rollers, and hold it in proper position to be acted h h repreon by them. I I represent recesses or depressions in the bending-cylinders, by means of which they are adapted to act upon the plates, which have already a folded edge when presented to this machine for action.

The operation of our machine is as follows: The plates, having been previously bent upon the edges in another machine, are successively presented to this machine for action. Aplate having been laid upon the table, one end is inserted between the opening between the cylinders, which have been separated to permit this operation, and pushed forward until its forward edge comes in contact with the guidestops, as shown in Fig.2. The handle F is then raised until it is caught by the catchlever, by which means the eccentric collars are partially revolved, and the upper cylinder consequently brought down upon the lower. The frame 0 is then brought forward, as shown in Fig. 4, by means of which action the upper cylinder is caused to pass over the lower, and by its pressure theintermediate metal plate is caused to assume the form of the bending-surfaces. The bar F, being disengaged from its catch, is left in its depressed position, while the frame 0 is raised for the purpose of elevating the upper bending-surface, in order that the plate may be removed from the machine. The plate may be held from moving, when acted-upon, by a suitable clamp upon the table.

The lower bending-surface is made tapering from end to end, as shownin Fig. 6, and the upper surface caused to conformthereto, in order that the plate, when acted upon, may be bent more at one end than the other, so that when a series is put together, as shown in Fig. 7, the adjacent ends will interlock readily, the narrow end of one fitting accurately the wide end of the other, as shown.

This will be understood by inspecting Fig. 7, in which the lines a: a; and y 3 indicate the relative width of the upper and lower ends of the plate, the lower end of the plate, it being observed, being less in width just the distance necessary to enable it to fit within the bent sides of the upper end of the plate below it, the sides of each plate being bent on a taper for the purpose, as indicated in the drawing by the lines 2 z. The lower bending-surface is depressed, and the upper surface caused to conform thereto, in order that the sheet may be bent more in the middle than the ends, this excess of pressure in the center being necessary to cause the sheet toassume a uniform curve throughout its length, as shown in Fig. 8. The edges of the sheet, being double, retain their place when bent; but the central portion, being single, has a tendency to spring backward, as shown in Fig. 9, after the pressure has been removed, and hence the central portion requires an excess of pressure, as described.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. The combination of the fixed bendingcylinder and the movable bending-cylinder, V

with the'eccentric clamping mechanism, the

movable cylinder, when actuated by the clamping mechanism, being adapted to pass over the fixed bending-surface, substantially as described.

2. The combination of the fixed and movable bending-cylinders with the frame 0, ec-- centric collars D D, and bar F, as described.

3.-The combination of the bar F and catchdouble portion, for the purpose of securing uniformity of curvature, as described.

6. The bending-surfaces provided with recesses, as and for the purposes described.

7. The tapering bending-surfaces, adapted to make the plates narrower at one end than the other, as described.

8. The bending-surfaces provided with the tapering surfaces, the depressed and projecting portion, and the recesses, as described.

CHARLES A. SCOTT. MICHAEL SCHULTZ.

Attest:

S. H. WHrrMoRE, Gno. P. BROWN.

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