US740803A - Tube-bending machine. - Google Patents

Description

N0."74o.,a03. r 'PATBNTED 00T. 6, 1903,

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TUBE BENDING MACHINE. APPLIUAIJIOfN` FILED JULY 16.4 l1903. l Y No MODEL. 2 SHEETS-SHEET 1;

No. 740,803." PATENTBD ocr.".,19os.

0: A. BRIIGEL.

" TUBE BENDING MACHINE. APEIIGATIDNFIIED JULY 16, 190.3.

K0' MODEL. 2 SHEETS-SHEET 2.

Z ,unllmum i' u imm xwmlm'' 1t HS NEM WITNESSES I INVENTOR lag im? UNITED STATES Patented october e, 1903.

CHARLES A. BRIIGEL, OF VVILLIAMSPORT, PENNSYLVANIA. y

TUBE-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 740,803, dated October 6, 1903.

l Application tiled July 16,1903. Serial No. 165,751. (No itnoclel.)V v I To all whom, it may concern:

Be it known that I, CHARLES A. BRIIGEL, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania', have invented certain new and useful Improvements in Tube-Bending Machines; and I do hereby declare that the following is a full, clear, and exact description of the saine, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference markedthereon.

The present invention has relation to that class of machines used for bending or form ing curves in metal pipes or tubes in which are employed astationary grooved former and apivoted hand leverconnectingtherewithand carrying a grooved roller which presses the pipe or tube around andagainst the former to give to the pipe or tube the required shape.

The object of the invention is to provide a machine of the above character that will be especially adapted for bending straight or taw pering tubing used in the manufacture of musical band instruments, which requires special care in the operation to avoid injury to the tube orin any man ner marits appearance.

The invention consists in a tube-bending machine constructed substantially as shown In the accompanying drawings the grooved Y former, which gives the desired curve to the tube, comprises two separable sections A B, detachably held together by a screw at (shown in dotted lines of Fig. 3 of the drawings) or by any other suitable andwell-known means. These sections A B have segmental grooves, so that when together a complete hemispherical groove l) will be formed, to correspond with the groove c in the presser-roller D. The lower section B of the former has a downwardly-extending grip-bar E, which extends transversely thereof and upon the under side of the section, to enable the machine tn be held by a suitable vise or other grip holdingtool. Upon the upper side of the separable wit-h which engages a guide-roller Gr, pivotally connected to the under side of a handlever C through the medium of a screw or other suitable fastening e, the curved track being detachably connected to the formersection by means of screws d or other like fastenings.

The hand-lever G is pivot-ally connected to the former by means of a stationary pivotpin f, which extends up through an elongated slot g in the endof the hand-lever, said lever being held in engagement with the pin by a suitable key h extending through a key-slot in the end of the pin.

The above construction enables the handlever not only to have a movement on the arc of a circle, or, in other words, a pivotal movement, but a movement lengthwise to adapt the guide-roller to the curve in the guide-track, the elongated slot in the end of the lever admitting of this movement.

The feature of the guide-track F and the guide-roller'- G in connection with the longi-V tudinal movement of the hand-lever C will admit of making the bendingof any form of `tubing desired. At the back of the former is a clamp H, which is adjustable to adapt it to tubes ofvarying diameters, said clamp having a concave jaw c' to grasp the tube to be bent and hold it stationary while the presserroller D is'breught into contact therewith to press it in the groove of the former to give it the required shape.

. `The clamp H extends through a slot in the end of a stud j, projecting from the former and held therein by a tapering key lo, which engages a slot in the endof the clamp, thereby providing an adjustable clamp that can be adapted to hold the end of ythe tube of whatever size or diameter, the tapering key drawing the jaw of the clamp tightly down against the end ot" the tube to -hold it while being bent.

The former, comprising the separable sections A B, may be variously changed in shape to adapt it to the form or shape otkthe tube to be bent, 'the former being modified or changed as circumstances require without in any manner departing from the principle of the invention, and any such changes as would come within ordinary mechanical judgment ICO regarding the details of construction may be resorted to and still come Within the scope of the invention.

The former, as hereinbefore described, is constructed of two separable sections, which enables a circle greater than a half-circle to be bent and removed from the machine, which could not be done Were the former made in one piece.

The presser-roller D is adjustable on the hand-lever C to adjust its position with relation to the former, and one of many means that may be employed for this Purpose is forming in the lever an elongated slot Z, through which the stationary shaft m extends, and providing a bearing 'n on said shaft for the end of a set-screw o, said setscrew engaging a stationary screw-nut p, depending from the lever, nuts q o 5 engaging the screw-threaded ends of the shaft to hold it to the level' and the grooved roller upon the shaft.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-- A tube -bending machine, comprising a grooved former consisting of two separable sections each having a segmental groove to form when together a hexnispherical groove, a curved track detachably connected to the former, apivoted hand-lever carrying a guiderolier, said lever having a movement length- Wise to adapt the guide-roller to the curve in the track, a grooved pressure-roller carried by the lever, and a suitable clamp adjustably connected to the former to adapt it to hold tubes of different diameters, substantially as and for the purpose set forth.

In testimony Whereofl afx my signature in presence of two witnesses.

CHARLES A. BRIIGEL.

Witnesses:

A. L. RANK, GEORGE TRUEMPE.

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