US437829A - Box-bending brake - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1'.

H. BORN.

BOX BENDING BRAKE.

Patented Oct. '7, 1890.

INVENTU (No Model.) 3 Sheets-Sheet 3.

H. BORN.

BOX BENDING BRAKE.

No. 437,829. Patented Oct. 7, 1890.

-NlTE STATES PATENT OFFICE.

HENRY BORN, OF CLEVELAND, OHIO.

BOX-BENDING BRAKE.

SPECIFICATION forming part of Letters Patent No. 437,829, dated October 7, 1890.

Application filed March 4, 1890. Serial No. 342,648. (No model.)

To all whom it may concern.-

Be it known that I, HENRY Bony, a resident of Cleveland, in the county of Cuyahoga, State of Ohio, a citizen of the United States, have invented a new and useful Box- Bending Brake; and I do hereby declare the following to be a full, clear, and complete description thereof.

My invention relates to and consists in the peculiar construction and arrangement of the operative parts of said machine, the object of which is to facilitate the manipulation of said mechanism and to render it eifective for the purpose intended.

That the invention may be seen and fully understood reference will be had to the following specification and accompanying drawings, in which- Figure 1 is a side elevation of said machine. Fig. 2 is a detached plan view of the front part thereof. Fig. 3 illustrates parts of Fig. 2 in a different position. Fig. 4 is a vertical cross-section of said machine, on line a m, Fig. 1. Fig. 5 is a front end view of said machine. Fig. 6 is a rear end view of the same. Fig. 7 is a detached sect-ion, which will be hereinafter described. Fig. 8 is a side elevation of said machine, showing the beam raised.

Like letters of reference denote like parts in the drawings and specification.

Substantially this machine consists of a bed-plate or stationary clampingstoek A, the hinged clamping-beam B, and the bending bar 0, and the means for attaching and holding said stock, beam, and bar in position and in movable or operative relation.

The clamping-stock A is mounted upon the pedestals D D, as seen in Figs. 1, 5, and 8, and formed preferably as shown. The front side of said stock is provided with bearings E E for the journals F F of the bar O, whereas the face side is arranged to receive the beam B, as shown in Figs. 1, 2, and 6that is, at the rear end are projecting jaws G G, through which extends the pin H for a hinged connection with the beam B, which beam is fitted between said jaws and perforated to receive said pin, as shown in Fig. 7. At the front end is a clamping device for securing the reduced free end a of the beam B to said stock A, as seen in Figs. 1, 2, and 5. Said clampin g device consists of the bracket I and camthe cam-lever J is arranged to swing upon the bolt L, which extends through said bracket, as shown. In addition to the bolt-connection of the bracket and stock A, a lap-joint c011- nect-ion is formed by means of the flange c and the projection (1. Thus in using the clamplever J undue strains upon the bolts K K are prevented, owing to the resistance of the lug d.

In adapting this machine for the especial class of work for which it is intended it is essential that the free end of the beam B should be readily and easily disconnected and raised for removal of the bended sheet metal when in box form and for insertion of the sheets to be bent. To admit of a ready disconnection of the bracket I a notch d is used in the front lap d of said bracket, which allows of a simultaneous swinging back of the latter when and while the cam-lever J is loosened and turned, as indicated by the arrow in Fig. 1.

Figs. 1 and 2 illustrate the bracket and cam-lever in a locked position, while Fig. 3 shows said parts removed from engagement over the free end of the beam B, in which latter instance the beam is automatically tilted owing to the resiliency of the spring M, which is arranged in operative relation to the lever N of said beam, as seen in Fig. 1.

On inserting the material to be bent between stock and beam it is essential that the beam B should at either side be in tight c011- tact with the sheet to be bent. This condition is attained by adjustment of the set screw 0 and cam-lever J.

In Fig. 7 is shown the set-screw O, threaded into the cross-piece P of the jaws G. This set-screw is intended to bear upon the upper side of the beam B when the front end thereof lies upon the material to be bent. Thus when the bracket is drawn into engagement with the bolt K and the cam-lever J locked, then the beam B is caused to bind firmly upon the inserted material and prevents the same from slipping out of place while being bent. The oblong hole admits of at raising of the beam according to the thickness of the sheets of metal, and with the set-screw O the adjust- ICO ment is controlled or limited to assure a binding contact upon said metal.

In Fig. 4 is shown the stock A, the beam B, and the bending-bar C, each of them being lined with steel plates fff to increase the durability and effectiveness of the machine.

The grooves g g (shown inFigs. 1 and 8) ad Init of bending flanged sheet metal, the flange being placed in said grooves to enable the contact of the material with both the stock and beam,

The bending-bar C, as above stated, is journaled in the bearings E E. The journals F F being integral parts of said bar are so set as to admit of turning said bar in close proximity and in line with the bite of the stock and beam, as seen in Fig's. 1 and 4.

By means of the handles h h the bendingbar 0 is turned. The Weight R is provided with the hub R and secured to the extension of one of the journals F, as seen in Figs. 1, 6, and 8, to facilitate the turning of said bar by its counteraction. S S are clamps for securing the steel plates f to the bendingdoar O, as shown in Figs. 1, 4, and 8.

When the material is inserted in the manner as above stated, the bending-bar C is raised or turned according to the nature of the angle which is to be produced.

I claim and desire to secure by Letters Patent The combination of the stock A, the beam 13, hinged between the jaws G G of said stock and provided with a'lever N, with spring M at said hinged end, and the bracket I, with cam-lever J, for locking and unlocking said beam to the stock A, constructed and arranged substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY BORN.

Witnesses:

W. E. MOORE, W. H. BURRIDGE.

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