US317002A - Hand bending-tool - Google Patents

Description

(No Model.)

G. A. OHL.

HAND BENDING 1300L.

No. 317,002. Patented May 5, 1885.

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NrTEn STATES PATENT OFFICE.

GEORGE A. oni., or NEWARK, NEW JERSEY.

HAND BENDING-TOCJL.

SPECIFICATION forming part of Letters Patent No. 317,002, dated May 5, 1885.

I Application led August 30, 1884. (No model.)

.To all 1.071.071?, it may concern:

Be it known that I, GEORGE A. OHL, a citizen of the United States, residing in Newark, Essex county, New Jersey, have invented certain new and useful Improvements in Hand Bending-Tools, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to that class of bending-tools used by cornice and gutter makers and other sheet-metal workers in preparing angle-pieces of i'lat iron, and of round, halfround, and oval rods for strengthening and joining their sheet-metal manufactures; and my improvements consist, partly, in making the bending-gage reversible, partly in providing the edge of the gage with grooves for bending oval, round, or half-round rods, and partly in the casting of the bending-lever with a chilled cast-iron face.

In the drawings annexed one size of the bending-tool is shown of its full dimensions, Figure 1 being a plan of the tool with the handle elevated as in bending. Fig. 2 is a transverse section of the same on line w m in Fig. 1, with the handle depressed for the insertion of the iron to be bent, the latter being shown in dotted lines at c c as inserted in the gage, and in dotted lines at d das when bent. Fig. 3 is a front elevation of the parts as seen in Fig. l. Fig. 4 is a plan, and Fig. 5 an end, view of the bed and boxes for the bending-lever. Figs. 6 and 7 are respectively a top view and edge view of the reversible gage as seen in Fig. 1.

' A is the bed, a flat plate shown provide with holes a, to fasten it to a table or bench, and having an end bracket indicated in dotted outline at A in Fig. 3, which maybe provided to secure the bed to a post for the greater convenience of the workman.

B B are bearing-boxes affixed to the bed for the pivots C C of the bending-lever D, the center of motion being on a line with the corner of the gage E, and the working end of the lever being cut back to the samelineatD, asis common in such bending-tools. The gage is formed of a body, E, and seatsE, thelatter being shown in the drawings as formed at both ends of the body and projectingbeyond its surface, so as to raise the body from the bed for the insertion of the metal rods to be bent between the gage and the bed. The seats when thus .formed restupon the bed and leave a passage between them for the passage of the rods to be t bent; but the seats may, if preferred, be formed upon the bed itself of the proper height and the gage be of even thickness throughout.

Two adjacent sides of the gage are formed with a series of grooves, b, to steady rods or bars of rounded character and to hold them square with the bending-corner while the hand-lever D is operated, and such grooves may obviously be made to suit the class of rods they are intended to guide.

This tool is intended to be perfectly portable, and to furnish a workman upon a roof or similar place with the means of bending either fiat or round bars without heating the iron or resorting to a smiths shop, and the gage is therefore removably secured to the bed A, as by screws-e e, so that the proper sides may be turned toward the bed A andtoward the working end of the lever at D, for operating upon hoop-iron or round rods, as may be required. In the drawings the flat sides are thus adjusted, and apiece of hoop-iron is represented before and after bending by the dotted lines c c and d d in Fig. 2. The gage is therefore reversible, and is intended to be secured with its dat side or grooved side in proximity to the bed, as may be required, by the operator for bending either iiat or round bars.

With the tool thus described, rods, wires, v

and thin flat bars that will pass between the gage and the bed may be readily bent to any desired shape, or the lever D may be used to partially bend a straight bar at numerous points, and thus form any desired curve upon the bar. In practice I find that the gage requires no adjustment to suit the range of work done by the tradesmen to whom I have referred above when bending iiat bars, as their `requirements vary only from band to hoop iron, and the seats upon the gage or bed may therefore be made high enough to admit the thickest of the bars to be bent, the thinner ones then bending without any detriment, although not fitting the space quite closely. I nd, however, that round bars cannot be well treated in the same manner, and therefore to accommodate wires of various thicknesses beneath the gage I form the series of i grooves b b of various depths, and thus adapt the gage to many sizes Without adjustment.

The Working end of the lever at D is obviously much exposed to Wear by the pressure of the bars that are bent, especially if they are of convex form, and I therefore cast the end D with a chilled-iron face, and thus secure great hardness at such point without any material expense. l

I am aware that a hand bending-tool with an adjustable gage has already been used 5 but have invented the construction shown herein to effect other objects than can be secured by adjusting the same gage-namely, cheapness of construction-arising from the simplicity and small number of the parts, and the combination, in one gage, of means for holding fiat or rounded bars by the reversible construction adopted. I also claim a grooved gage, broadly.

Having thus described my invention, what I claim herein isl. In a hand bending-tool, the combination, with a bed and bending-lever pivoted thereto, of a reversible gage provided with bearingsurfaces for different kinds or sizes of bars, and with means for securing it removably upon the bed, substantially as shown and described.

2. The combination, with a bed and bendinglever pivoted thereto, of the reversible gage provided with two fiat adj aeent faces, and with tWo similar series of grooves of increasing depth upon the opposite adjacent faces, as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of tWo subscribing Witnesses.

GEO. A. OHL.V

Witnesses:

L. LEE, Trios. S. CRANE.

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