US674574A - Metal-bending machine. - Google Patents

Description

Patented May 2|, 190|.

c. nEcRETTE. METAL BEN'DING MACHINE.

(Application led Aug. 1, 1900.)l

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C. DECRETTE. METAL B ENDING MACHINE.

(Application iled Aug. 1, 1900.) (No Model.) 2 Shasta-Sheet 2.

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A noa/v5 Ys NITE STATES CHARLES DECRETTE,

OF NEV YORK, N. Y.

METAL-BENDING IVIACHIN E.

SPECIFICATION forming part of Letters Patent No. 674,574, dated May 21, 1901.

Application tiled August l, 1900l Serial No. 25,524. (No model.)

T all whom, t may concern:

Be it known that' I, CHARLES DEORETTE, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Metal- Bending Machine, of which the following is a full, clear, and exact description.

This invention relates to improvements in machines for bending metal bars; and the object is to provide a simple machine of this character by means of which the metal may be turned ata sharp angle at one operation and requiring but one heating of the metal, thus materially saving in time and consequent expense as compared with the bending-machines in which several beatings of the metal are required.

I will describe a metal-bending machine embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which'similar characters of reference indicate corresponding parts in all the figures.

Figure l is a plan View of a bending-niachine embodying my invention. Fig. 2 is a front elevation. Fig. 3 is a section on the line :c of Fig. 2, showing the position of parts after bending a strip of metal. Fig. 4 is a section on the line y y of Fig. 2, and Fig. 5 is a section on the line z e of Fig. 2.

The machine comprises a base l, from the rear side of which a standard 2 extends upward and forward, and on the upper end of this standard is a fixed bending-head 3 and a swinging bending-head 4. The upper end of the swinging head 4 swings on a lug 5, attached to the head 3, and the lower portion of this swinging head 4 has a block 6, from which a pivot rod 7 extends downward through a bearing 8 and also through a bearing 9 at the lower end of the upright 2. Extended outward from the fixed head 3 is a table consisting of side bars l0 and 11,'connected at the outer end to a block l2, from which a brace 13 extends downward to a connection with the base 1. Adjustable along this table, consisting of the bars 1U and ll, is an abutment-block 14, the body portion of which is provided at the front or inner side with a slot l5 in which the web of a wedgeshaped adjusting-block 16 may slide, and

this adjusting-block is held as adjusted by means, as here shown, of a pin 17, passing through openings in the block 14 and through either one of a series of openings in the block 16. The lower portion of the block 14 passes between the sid-e bars l0 and 1l and is provided with toothed plates 1S, designed to engage with teeth formed on the under side of said bars l0 and ll, so as to securely hold the block as adjusted lengthwise of the table. When adjusted, the parts may be clamped together by means of a bolt -l9.

Extended outward from the swinging head 4is a table'similar to the first-named tablethat is, it consists of the side bars l0 and l1 and the adjusting device movable thereon similar to the first-named adjusting device, the parts being .indicated by the same numerals. s

At the inner end of the fixed table a holding-block 2O is mounted to slide against a guide-block 21 and underneath a guide-plate 22, secured on the upper side thereof. From this guide-block 20 an arm 23 extends outward, and from the arm 23 an arm 24 extends t0 a fixed connection with a rod 25. The arm 24 has pivotal .connection with the arm 23, as plainly shown in the drawings, and the rod 25 has bearings 26 and 27 at the inner end of the fixed table. The upper end of thisxed rod 25 is provided with ahandle 28. Asimilar sliding guide-block 29 is adapted to move on the inner end of the swinging table and is guided by the block 30 and the top plate 3l, and on this block 29 is an arm 32, pivotally connected to an arm 33', extended from a vertical rod 34, provided with a handle 35 on its upper end and having bearings at its lower portion in projections 36 37.

The holding-blocks 2l and 29 are provided on their inner surfaces or on the sides adjacent to the bending-heads with longitudinal channels to receive the metal strip to be bent, as plainly indicated in Fig. 4. From the outer end of the swinging table a brace-rod 38 extends down to a connection with a collar39, attached to the lower end of the pivot bolt or Vrod 7 In operation the metal bar after being heated sufliciently is placed in the machine, as indicated clearlyin Fig. 2-that is, it is IOO placed with the part to be bent against the bending-heads 3 and 4 when said heads are in alinement. Then the` adjusting devices on the tables are to be moved up against the ends of the strip and irmly clamped. The close or fine adjustments against the ends of the strips may be made by moving the wedgeshaped blocks 1G. After this the rods 25 and 34 are to be turned in a direction to move the holding-blocks 2l and 29 into engagement with the strip, the inner or adjacent ends of said holding-blocks being near the point to be bent- Now the swinging table is to be swung forward sufficiently to bend the strip to the required angle. After the bending of course the rods 25 and 34 are to be rot ated to disengage the holding-blocks 2l and 29 from the strip, so that it may be readily removed.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. In a machine for bending metal, a iixed bending-head, a bending-head mounted to swing, supporting-tables extended outward from said heads, adjusting devices movable on said tables, channeled holding-blocks, and means for slidin'g said holding-blocks toward and from each other lengthwise of the tables, substantially as specified. v

2. A machine for bending metal, comprising a stationary bending-head, a swinging bending-head, tables extended outward from said bending-heads and each consisting of two side bars, adjusting-blocks movable between the side bars, means for clamping said blocks as adjusted on the tables, wedgeshaped adjusting-blocks for engaging with the first-named adjusting-blocks, longitudinally-movable holding-blocks provided with channels to receive the bar to be bent, and means for moving said holding-blocks, substantially as specified.

,3. A machine for bending metal, comprising a standard, a fixed bending-head on said standard, a bending-head mounted to swing relatively to the standard, tables extended outward from Said heads, adjustable clamping or adjusting blocks movable on said tables, holding-blocks movable toward and from each other provided with channels to re- -ceive the bar to be bent, vertical rotary rods,

arms extended from said rods and having pivotal connection with the holding-blocks, and guides for said blocks, substantially as specified.

4. A machine for bending metal, comprising a standard, a fixed bending-head on said standard, a bending-head mounted to swing on said standard, tables extended outward from the heads, one being mounted to swing with the swinging head, clamping or adjusting devices having locking engagement with said tables, and devices for engaging a bar to be bent near its point of bending, the said devices being mounted to slide, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES DECRETTE. fL. s]

Witnesses:

FRANK OswALD, WILHELM FLSCHNER.

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