US313134A - Machine for bending bars - Google Patents

Description

(No Model.) 2 Sheets-Sheet 2.

' A. URBAHN.

MACHINE F011 BENDING BARS. No. 813,134. Patented Mar.- 3, 1885.

lisirrnn States Patent tries.

ALVVILL URBAHN, OF PATERSON, NEW JERSEY, ASSIGNOR TO JACOB MAY, OF BROOKLYN, NEXV YORK.

MACHINE FOR BENDlNG BARS.

SPECIFICATION forming part of Letters Patent No. 313,134., dated March 3, 1885.-

Application filed June 10, 1884.

T aZZ 2117mm it may concern.-

Be it known that I, ALWILL URBAHN, a resident of Paterson, in the county of Passaic and State of-New Jersey, have invented an Improved Machine for Bending Metal, of which the following is a full, clear, and exact description, reference being made to the accompanying drawings, in which Figure 1 is a perspective view of my imro proved machine for bending metal. Fig. 2 is a plan or top view of the same. Fig. 3 is a vertical central section of the same on the line 0 c, Fig. 2. Fig. at is a detail top view of the clamping mechanism, showing the parts there- 1 of separated.

The object of this invention is to produce a machine on which rods or straps of metal may be bent at one or two different places.

The invention consists in the novel combi- 2o nation of parts hereinafter specified.

In the drawings. the letter A represents a suitable table or platform. Upon this table is secured by suitable bolts, a plate, B, of metal or other material, of circular or other form. Upon this plate Blies a bar, O,which, by a vertical swivel-pin, a, is swiveled to said plate B, as is more clearly shown in Fig. 3. At the ends of the bar 0 are upwardlyprojecting lugs Z) and d. The bar O is straddled by the fork of a lever, D, said fork being pivoted to the uprights b d of the said bar by horizontal pivot-pins c. The ends of the fork of the lever D are provided with upwardlyprojecting lugs f and g, which are in line with the projections b (1, respectively, as shown, so that a bar or plate of iron to be bent may be clamped between the lugs f b and g (1 whenever the'free end of the lever D is depressed; but when the free end of the leverD is raised,

40 as in Fig. 1, the said clamping-jawsfb and g (l are open. The free end of the lever D carries a roller or enlargement, h, which bears upon a spring, E, that is fastened upon the table A. WVhen the lever D is in the position shown in Fig. 1, its free end is raised by a raised portion of the spring E, so as to hold the clamping-jaws open. The lever D can be vibrated around the vertical swivel-pin a, together with the swivel cross-bar G, from about the position which is shown in Fig. 1, in the direction of the arrow shown in that figure (No model.)

until it (the lever) strikes an abutment, i, which is fastened to the plate B, or may be fastened to the table A. This abutment should be removable, so that it may be replaced by another, for the purpose of varying the sweep of the lever.

When the cross-bar and lever are in the position shown in Fig. 1, the said cross-bar is between two raised portions, j and Z, of the plate B, said raised portions being about on a level with the forked portion of the lever D, which is between them. To the projection j is secured, in line with the cross-bar C while the same is in the position shown in Fig. 1, a further projection, m, which serves as a gage for locating one end of the bar or strap of metal to be bent. To the projection j is also fastened a roller, n, and to the projection Z is likewise fastened a similar roller, 0, both said rollers turning on vertical axes.

The operation of the device is as follows: hen the machine is in theposition shown in Fig. 1, a plate or bar of iron to be bent is placed over the crossbar C, so that it fits between the jaws f b and r d. the end of said plate or bar which is to be bent bearing against the abutment m. The attendant now moves the lever D in the direction of the arrow which is shown in Fig. 1, at the same time bearing down upon said lever, so that it will, while vibrating around the vertical axis (I, also vibrate around the horizontal axis 0 and reach the lowered portion of the spring E. The movement of the lever D around its horizontal pivot causes the jaws f g to approach thej aws 0 (Z, and thereby to firmly clamp the piece of metal which is between said jaws and prevent it from sliding lengthwise. The lever D having thus clamped the piece of 0 metal which is tov be bent against the upright lugs of the crossbar 0, the further motion of said lever D around the vertical pivot a causes it to carry said piece of metal against the rollers n and 0, thereby bending its ends at sub- 5 stantially right angles in opposite directions, as clearly appears from Fig. 2, in which figure the letter F represents the strap of metal, and the letters p and r the bent ends thereof. The attendant next moves the lever D back to the position shown in Fig. 1, thereby opening the jaws and allowing the removal of the bent piece of metal and the reinsertion of another piece to be bent.

I have described the projecting portions j Z as being two separate projections; but they may be united into a single projection, if desired.

The abutment m may be adjusted to different distances from the axis of the vertical pivot a, or may be removable to be replaced by another abuttingpiece differing from it in thickness.

Although I have shown the bending-blocks to be rollers a 0, and although such rollers, by causing less friction, are preferable to rigid bending-blocks, I desire it, nevertheless, to be understood that bending-blocks supported rigidly on the plate B or table A in the place of the rollers n 0 will be the equivalents for the purposes of my invention of said rollers.

I claim- 1. The combination of the plate B, having projections j l and the roller a, with the swiveled bar 0, having the lugs b d, and with the lever D, having the lugs f and 9, said lever being carried by the horizontal pivot e, which joins it to the bar 0, substantially as herein shown and described.

2. The combination of the plate 13, having projections j l and rollers 42 0, with the swiveled cross-bar 0, having lugs b d, forked lever D, having lugs f g, and with the horizontal pivot e, which joins the lever D to the bar 0, substantially as herein shown and described.

3. The combination of the lever D, having lugs f g, with the pivot e, swiveled cross-bar G, bending-blocks a 0, and abutting-piece m, substantially as herein shown and described.

4. The combination of the spring E with the lever D, swiveled cross-bar G, and one or more bending-blocks, n o, substantially as herein shown and described.

ALWILL URBAHN.

Vitnesses:

WILLY G. E. SCHULTZ, J OHN O. TUNBRIDGE.

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