US1439118A - Pipe-bending machine - Google Patents

Description

Dec. 19, 1922.

NI. L. PETERSON. PIPE BENDING MACHINE..

2 Shins-SHEET x.

FILED OCT. 29, |920.

Q, .....m mm 2.3i --1 Dec.` 19, 1922.

M. L. PETERSON.

PIPE BENDING MACHINE.

FILED ocT. 29, 1920.

"l lll Q1 flamme/12a atente Der. 19, 1922.

MARTIN L. PETERSON, OF DETRTfMICEIGAN.

pira-Banniere. Macallan n Application file/d ctober 29, i920. Serial tifo. af.

To all whom tmay concern:

Be it known that l, MARTIN L. PETERSON,

a citizen of the United States of America,-

residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Pipe-Bending Machines, of'which the following 1s a specification, reference being had thereln to the accompanying drawings.

This invention relates to a machine for bending pipe, tubes, wire, rods andthe like and more particularly to a machine, for forming continuous coils from such materials. An object of the invention is' to provide a machine which is adapted to form from a straight piece of pipe or the like of any desired length, va continuous coil of aniform or varying diameter, and further, to' form two or more coils of different diameters from a single continuous piece of tubing or the like, with the several coils arranged con-A centrically, one within the other. A further object is to cheapen and Ifacilitate the operation of bending and coiling stock of any desired diameter or length and securing accuracy and uniformity in the diameter and spacing of the turns of the coils.

A further object isto enable the o erator during a continuous operation of t e machine, to vary the diameter of the turns of a coil at will and to accurately graduate a turn of one diameter int0,another turn of a different diameter during such continuous'operation. f A

It is also an object of the invention to enable the operator to form any desired number of pieces or lengths of stock into separate coils with a continuous operation of the machine, and to provide simple means for adjusting the machine, whichv means maybe adjusted to vary the product during the continuous operation of the machine.

It is also an object to provide novel means for feeding and forming the stock whereby the use of separate forming or like devices fon each size or. form of coil is dispensed with, and to provide certain other new and useful features, allv as will hereinafter more fully appear,

lVith the above and other -ends in view, the invention consits in the matters hereinafter` set forth, and incre particularly pointed out 1n the appended claims', reference being had to the accompanying drawvin s, in whichigure l is a side elevation of a machine illustrativev of the invention; 4 l

Fig. 2, a plan view of the same;l

Flg. 3 an enlarged sectionalA4 detail of the bendmg rolls and adj acentparts;

Fig. 4 an enlarged transverse section 'of the carrier and showing a tube in place thereon; ,y

F .5, a'detail of a short portion of the carrier in side elevation with a tube in place thereon;

Fig, 6 is a detail illustrative of the manner 1n which a single coil is formed with .evenly spaced turns;

Fig. 7 is a similar view illustrative of the manner of forming concentric coils from a single piece of tubing, and

ig. 8 isa detail illustrative of the manner 1n which concentric coils are formed, and showing the same in endl elevation, together wlth the bending rolls.

It has `been known that. tubing and the like ma' be bent by running it between rolls, but di culty has always been encountered in-forming by this method coils having turns of uniform diameter and spacing. This uniformity is secured throu h the manner in which the rolls are placed and the manner in which the tubing is run between them. So faras known to applicant he is' the first to .devise a'machine which will form concentric coils of different diameters from a lcontinuous piece of tubing or the like and with a continuous movement -of'the stock through the machine.

The bending rolls are indicated in the accompanying drawing by the numerals 1, 2, and 3, the roll 1 being supported in a mannerto engage the upper side of the tube or other member to be bent and the roll 2 being located below the tube being bent and slightly forward of the roll l in the direction of the travelof the tube therebetween. The roll-3 is also located below the tube but to the rear of the roll l in the direction of travel 'of the tube and this roll 3 is carried by a suitable movable support so that it may tion of the machine this roll is first loweredso that the end of the tube may be inserted between the rolls 1 and 2 and then by raising the lroll 3 relative to the rolls `l and 2 the pipe or tube is given the desired .bend as it is forced endwise between the roll 1 and the opposed rolls 2 and 3. The degree of elevation of the roll 3 relative to the rolls 1 and 2 determines the amount of the bend which will be given the tube and this particular arangement of the roll 1 intermediate the rolls 2 and 3 and the position of the roll 1 rearwardly of the roll 2 gives the setting action or permanent bend which accuratelydetermines the diameter of each turn of the finished coil. The roll 3 simply determines the angle or inclination at which the tube is fed to the rolls 1 and 2 and therefore the amount of the bend which will be put in the tube, but the rolls l and 2 give the setting action which takes the spring out of the turn of the coil and gives/it a permanent set or bend. The coiled or bent portion of the tube issues from between the rolls 1 and 2 freely, as the tube is -forced through between these rolls in contradistinction to being pulled through or fed by a positive drive of 011e or more of the rolls, and therefore the turns of the coil retain the set or permanent curvature imparted to them by the rolls 1 and 2, which set determines the diameter of the turns and makes them uniform.

In order that the several turns of the coil may be accurately spaced apart and that the coil as it is progressively formed will be projected laterally away from the path of that portion of the tube issuing from between the rolls, a thrust member is placed in a position to engage one side of the tube after it issues from between the rolls so that the formed turn of the coil will be pushed sidewise or in a'direction longitudinally of the coil, bending the pipe or tube laterally as it is formed and thus, by such bending action determining the spacing of the turns. This thrust member preferably comprises a roll 4 which is rigidly supported in any convenient manner and properly positioned to engage the side of the tube, preferably at a short distance beyond the roll 2.

By so mounting this thrust roll 4 that it may be shifted from one side of the issuing tube to the other, the direction of travel of the coil laterally from its normal path and longitudinally of the coil in either direction,may be changed at will and .therefore, as illustrated in Fig. 7, a'double coil or a coil of small diameter continuouswith a-coil of greater diameter and said coils in concentric relation, with the larger coil surrounding the smaller,- -may be formed. This is accomplished by providing a length of tube or other stock which is great enoughv to form both coils, then 'setting the roll 3 so that the coil of thesmallest diameter will be formed. After the desired length of coilhas been formed, the roll 3 is gradually lowered during the formation of a turn of the coil, thus gradually increasing the diameter of this particular turn until it reaches the diameter at-which it is desired to form the large coil, the thrust roll 4 being shifted from one side of the tube to the other atthe beginning of the increase of diameter of the turn over the diameter of the smaller coil. This shifting of the thrust roll' from one side of the tube to the other will reverse the direction of the travel of the coil laterally or in a longitudinal direction of the coil as it is progressively formed, thus forming the larger coil, outside of and concentrically with the small coil. The space between the inner and outer coils will, of course, be limited by the size of the roll 1 as this roll in forming the outer coil must lie outside the plane of the inner coil which must travel past and over this roll during the formation 'of the outer coil.

The above described method of coiling a tube, wire, rod, or other similar length of Stock is illustrated in Figs. 6, 7 and 8 of the drawing, the supports for the several rolls, and means for adjusting the same being omitted from these figures.

In Figs. 1 to 5 inclusive, an organized machine is illustrated and as shown therein the roll 1 is carried by a suitable bracket or support 5 which is pivoted at 6 upon the base 7 of the machine so that said -roll may be adjusted toward or from the roll 2 by swinging this bracket upon its pivotal support, in any suitable manner, as by an adjusting screw 8 indicated in dotted lines in Fig. l. The roll 2 is mounted in suitable bearings upon a fixed support 9 on the base of the machine and the roll 3 is mounted in suitable bearings 10 carriedl by an adjustable frame 11 which is pivotally supported at one end by the fixed support 9 to swing upon anl axis coincident with the axis of the roll 2, that is,

`one end of this frame is supported by suit- The base 7 ofthe machine is formed withan inclined track 14 upon which is mounted a carriage 15 and this carriage is provided with suitable rolls 16 at its upper end to engage the underside of' the two parallelv v bars forming the adjusting frame 11 .which carries the roll 3.

mounted in suitable bearings upon the front end of the base 'of the machine. This drum may be turned 1n any suitable manne-r, but

This carriage maybe movedv along its track in any suitable man` .ner, as by'a cable 17 attached thereto and passing over and winding upon a drum` 18 asshown in the drawing, its shaft 19 is provided'with a suitable clutch 20l for .connecting a sprocket wheel 21-thereto so. that motion will be imparted to the shaft when the clutch is in operative position through the medium of a sprocket chain 22 engaging the sprocket and passing over a similar sprocket mounted upon the shaft of a suitable motor 23 or other suitable driving .means -By operating the clutch 20 the cable 17 is caused to be wound upon the drum 18 and the carriage 15 thus moved up the inclined track, approaching the pivotal support 12 of the adjustin bars or frame 11 which carry the roll 3. gy reason of the inclination of the track relative to the bars 11, these bars will be swung upwardly as the carriage moves up the inclined track and thus the roll 3 will be raised relative to the rolls 1 and 2 to regulate the amount of bend which Will be iven the tubing or other material which is eing passed between the rolls.

a To feed the pipe or other length or lengths of stock endwise between the bending rolls,

a suitable endless traveling chain or carrierl 24 is provided, said chain comprising a plurality of pivotally connected links to each of which is attached a pair of blocks 25 having formed adjacent sides providing a seat for the tube or other stock 26, as illustrated in Figs. 4 and 5. The links forming this carrier are also provided with teeth 27 thus forming a sprocket chain to engage a large driving sprocket or teeth 28 formed on the roll 2 which is mounted upon the shaft 13 and forms the bending roll 2. The sprocket teethf28 do in fact, form the face of the bending roll, the carrier chain seating upon said roll between the tube 26 and roll,

the roll and chain thus to ether forming the rotatable bending menager over which the tube passes immediately after passing beneath the bending roll 1. Mounted upon the outer end of the shaft 13 of the bending roll, is a sprocket wheel 29l engaged by a Sprocket chain 30 which passes over a ,sprocket on the driving shaft of the motor 23 and thus motion is imparted to the carrier chain from the motor, said carrier chain being positively driven thereby. rlhe rear end of the tube or pipe 26 is securely fastened 'to this carrier chain, in any suitable manner, as by a clip 31, shown in Figs. 1

i and 2, and is thereby firmly attached to the chain to be forced endwise thereby between the bending rolls, the power being applied by the chain to the extreme rear end of the tube which is also held seated in the seat blocks 25 of the carrier chain by said clip.

The upper run of this carrier chain is rigidly supported by a swinging frame 32 comprising parallel side bars wlth a series of rollers 33 mounted between the'bars in a position to engage the lower side of this upper run of the carrier chain and form a rigid support therefor. The side bars of this tilting frame 32 also form a support for a sprocket 34 over which the carrier chain runs at its-rear end and this tiltingv vthe pipe thereby raised by reason of such bending action (the roll 3 forming the fulcrum support for the rear end of the pipe), the carrier frame 32 with its carrier chain will be tilted or turned upon the axis of the -roll 3 in a like manner and like amount, by

reason of the engagement of the roll 36 with the lower side of the bent portion of the tube, or rather, the carrier chain which is l interposed between the tube and this roll.

The rear end of the carrier chain is therefore automatically raised to follow the natural upward movement of the rear end of the tube so that it may function to force the tube endwise between thebending rolls by being attached to the rear without putting a bend in the tube between the elevating roll 3 and the rear end ofthe tube. As the elevating roll 3 forms the fulcrum or support for the tube adjacent the rolls 1 and 2to direct the tube at the proper angle between theserolls 1 and 2 and thus give the desired bend to the tube, the rear end of the tube must naturally be raised to a divergent relation relative to the frame 11 and therefore byy mounting the carrier chain supporting frame 32 so that'it may turn freely upon an axis common with that vof the roll 3, the rear end of this carrier frame may also rise to a divergent relation to the frame 11, and this upward swinging movement of the carrier frame is made automatic and caused to eXactl follow the natural upward movement o the rear end of the tube, by providing the roll 36 upon the free forward end of the carrier frame, which Aroll rides upon the Alower side ofthe run of the carrier chain which is in rm contact with the bent portion of the tube directly beneath the bending roll l. A direct force is therefore applied tothe rear end of the tube by means of the carrier chain to force the tube endwise between the bending rolls, and the attachment of the rear end of the tube to the carrier chain is made possible by the automatic tilting of the carrier frame with the natural upward movement of the rear end of the tube, so that the full length of the tube may be forced through between the bending rolls by engaging the tube with the carrier chain at the rear end of the tube only, thus making it possible to feed tubes of any desired length continuously through end of the tube,

between the bending rolls and have them issue in a bent form freely from between these rolls. A tube which is the full length of the carrier may` thus be fed through of s tubes or other pleces of stock of greater length or of lesser length than the carrier may be continuously forced through between.

the bendin rolls, a suitable` number of deupon the carrier, and it will alsobe apparent that instead of the clips 131 other means may be employed for attaching the stock to the carrier chain and such means may engage over the stock in thel manner of the clips 31 or may simply engage the rear ends Y b position to guide the tube at the desired l. 4

of the several pieces of stock.

The thrust roll 4, previously descrlbed, 1s shown in Fig. 1 as v carried by a suitable ad'- justable bracket 38 which may be supported in any suitable manner', as by the bracket 5,

whichcarries the roll 1. This bracket 38 is preferably so constructed that it vmay be arljusted to bring the roll intov contact with either side ofthe tube and may be adjustedtoward or from the roll 1 to engage various sizes of turns of the coil being formed. It

will be noted that the roll 1, as shown in Fig.

l, is of considerably greater diameter in proportion to the rolls 2 and 3 than as shown atv 1a in Figs. 6, 7 and 8, the smaller roll being employed when it is desired to form the double coil shown in Fig. 7 but -in bending coils of large diameter with considerable spacing between the turns of the coil, it is not necessary to make the roll 1 of the comparatively small size -as'illustrated in Fi 6, 7, and 8 but may be more` nearly the s1ze of the rolls 2 and 3, as illustrated in Fig. l.

Tubespor other stock of any diameter in.

cross section may be bent by meansof the machine as illustrated, it being however necessary to adjust the roll 1 relative to the roll 2 upon a change in diameter of the stock being bent as, in order to give the proper set to the bend of the tube, the distance between the peripheral surface of the' roll 1 and the effective supporting surface of the roll 2 must be greater than the thickness or cross sectional diameter of the stock being bent,

and it is necessary that these rolls 1y and 2 be accurately positioned. Therefore, the roll 1 is made adjustable upon its support 5, in

any suitable manner, as by provlding a verticall slot 39 in the support to receive theA vshaft of the roll. This roll 1 may therefore be adjusted vertically relative to the roll2 and its adjustment laterally toward and from the roll 2 is provided for'v as hereinbefore described, by mounting the support 5 pivotally 'upon the base 7. v

`In the operation of the machine,- the carriage 12 is first run to thevlower end of its track so that the adjusting frame 11 which carries the roll 3 willbe in a substanigaaus] tially horizontalvposition, asshown in Fig.A 1 in full lines, or, 1n a position which is vsuch that the forward end of a tube placedthereon itt 2. en the forward end ofthe tube is above the roll 2, the carriage 15 isv moved up its inclined'track, thus swinging the-'rear A- end of the frame 11 upwardly and vcarryin the roll 3 upward relative to the rolls 1 ,an

'2.1 lThis upward movement or adjustment of the roll 3will bend the .tube and' form a support therefor to guide it, at the enter freely' between the rolls'lf'and I l v proper j angle, between therolls 1 andf2 to give the desired bend to the tube..A The carriage 15 is therefore drawn up the vincline just suiiciently to elevate the roll 3- to thev proper angle in orderto give the desired bend or set to the tube. At the time of adjustment rof the carriage 15, the motor is started and at will ley/adjusting the carriage 15 along its inclined track. By a continued even lelo adjustment of the carriage 15 relative to the 1 movement of the carrier chain, an even graduation of a turn of the coil from a turn of one diameter to a turn 0f another diameter may therefore be accomplished, as

illustrated-'in Fig. 8, ,or a coil of conical form 1n which the turns uniformly' diminishl in diameter toward pne end of the coil, may be made by a contlnuous even adjustment of the carriage '.15 during the progress of the tube between the rolls throughout thev A time of forming the entire coil. `After the -formation of one coil of a certain diameter and desired length, another coil of a greater diameter continuous therewith vmay bev formed -with the coil of larger diameter surrounding the smaller coil, as illustrated vin Fig.' 7 and as previously described, by

adjusting the thrust roll 4 upon its bracket 38 and by moving the carriage 15 during the formation of one turn of the coil, as pre' V'viously described, to form a graduated `turn connecting the two coils, the adjust- 'ment of the roll 4v into engagement with the proper side of the `tube' after the formation of the smaller coil, causing the turns of the larger coil to lead in ajdirection opposite to that of the turns of the smaller coil andA cause a travel of thelarge coil during, its formation, in a longitudinal direction opposite to thatat which the smaller coil moved when it was formed, thus forming the large' coi outside of and concentric with the small co1 v Obviously other means than the carrier iat.

chain, shown in Figs. 1 to 5 inclusive may be employedl for-forcing the tube endwise between the bending rolls which are pref-V erably plain .idler rolls, that is, rolls not .positively rotated 0r driven to feed the tube forward, it only being necessary to. rovide some means 'for engaging the rear en of the tube, whichfmeans is free to'. rise with said end of the tube as it moves u Wardly under the force of the bending actlon of `the roll 1 which force'will tend to swing the rear end of the tube upwardly bylreason of the engagement of the roll 3 with the lower side of the tube 4rearwardly of the roll l, and it may be. noted that it isdesirable to have the roll 3 positioned adjacent the roll 1 so that substantially the full length of the tubey will be bent to the proper form and in some instances it. may-be desirable to adjust the roll 3 along the frame 11 and carrier frame 32 to give the desired results. .Other means than the carriage 15 may also be employed for raising the rear end of the frame 11 to adjust the roll 3 relative to the rolls 1 and 2 but for heav Work this carriage running upon an inclined track is found to be the preferred means for the purposeas it requires but little power to operate it and gives great accuracy of adjustment. It is also obvious that the adjusting means, such as the carrier l5 and the means for forcing the tube through between the rolls,'such as the carrier chain, may be separately and independently operated by power applied thereto in any suitable manner or may be manually operated where the work to be done requires comparatively little power, such as where wires or tubes of small diam eter are to be bent. l

Obviously other changes in the construction and .arrangement of scope of the appended claimsmay also be made without departing from the spirit of the invention and I do not therefore limit myself to the particular construction shown.

Having thus fully described my invention what I claim is:

1. A bending machine wherein a plurality of rolls are provided to bend the stock and said rolls are arranged to permit a free transverse movement of the free end portion of the stock, means for feeding the stock to the rolls, said feedin means being free to move transversely wlth the transverse movements of the rear end portion of the stock. y

2. In a bendin machine, the combination of a bending rol? to engage one side of the stock to be bent, a second bending roll opposed to the first bending roll and set in advance of the first bending roll in the direction of travel of the stock, a third roll to direct the stock to said first and second rolls, and means for feeding the stockendwise independentl of the rolls, said means being free to fol ow the transverse movements of the rear end portion of the stock caused by the bending action of the rolls.

3. In a bending machine, the combination parts within the of a bendingroll tol engage one' side of the stock to be bent, a second bending roll opposed to the first' bending roll and set in advanceof the first bending roll in the directionpof travel of thev stock, a third roll to direct the 'stock to said first and second rolls, means engaging and supporting the rearend portion of the stock for feeding the same endwise, and means for causing said feeding means to follow the transverse movement of said vrear end portion of the stock. 4. Ina bendin machine, the combination of a bendin rol to'engage one side of the ent, -a second bending roll opposed t0 the first bending roll and set in advance of the first bending roll in the directi'on of travel of the stock, a third roll to direct the stock to said first and second rolls, feeding means adapted to follow the transverse movement of the rear end portion of the stock, and means for carrying said feeding means and adapted to adjust said third ro l relative to said other rolls simultaneosuly with the progress of thestock and the bending thereof, to produce a variation in the curvature of the stock issuing from between the rolls.

5. In a bending machine, the combination of a bending roll to engage one sidev of the stockvto be bent, a second'bendin roll opposed to the first bending roll an set in advance of the first bendlng roll in the direction of travel of the stock, a third roll to direct the stock to said rst and 100 second rolls, means for feeding the -stock endwise between the rolls, adjustable means for supporting said third roll, and means for adjusting said adjustable means simultaneously with the progress of the stock and the bending thereof.

`6. In a bending machine, the combination with bending rolls, of means for forcing stock between the rolls to issue freely from between the rolls in coiled form, means for bending the stock laterally as it issues from between the rolls, pivotally supported means upon which one of said bending rolls is mounted, and means for Swingin said pivotally supported means upon its pivot to adjust said `roll during the production of a turn of thecoil for varying the diameter thereof.

7. In a bending machine, the combina-- tion of bending rolls, and means for feeding stock endwise between the rolls, said means being engaged with the rear end portion of the stock and operated by the bending of the stock to cause said means to followthe transverse movement of the rear unbent end of the stock, which transverse movement is caused by the bending of the stock between-the rolls.

8. In a bending machine, the combination with bending rolls, of means for ad- 13@ of said frame and .means for turning 'said justingvsaid rolls relatively including a Work supporting means and member mov-A able ,upon an 'incline toelfect said relative adjustment of said-ro1ls-and the adjustment of ythe work 'simultane,0usly.y v ,i Y 1 9. In a'bendin machine, the'combination with bendingros, of'means for adjusting one of said rolls includin a framev4 pivotally supported intermediate its ends and upon which the roll is mounted adjacent one end frame upon its ivotal support.

10. In a ben ing machlne, the combination with bending rolls,' or` means for adjusting one of said rolls including a pivoted bending rolls, meansfor'ad'usting said third frame upon which saidroll is mounted, and \oll relative to said first an second rolls, and

means including a. member movable upon an 4 justin inclined .way for turning said frame lupon 11.. In a bending machine, the combina-.-

tion -with bending rolls, of -means forf ad-A one of saidk rolls including a frame pivota 1y supported adjacent one end and' upon which said'roll is mounted, and means includin a member 4movable longitudinally of" and eneath'said frame for raising the freeend of saidframe.

' 412. In a bending machine, the combination Vwith bendin' rolls, of means for adjust?" lingl said rolls yre ativel including a swinging frame, an incline track beneath said frame, and means movable 'along-said track i :for swinging said frame.

' wherein said 'track is pivotally mounted .upon said frame to turn relatlve thereto and 13. In a nding machine, the combina` tion of bending rolls, an endless carrier for supporting and forcing stock endwise between therolls and a pivoted track for the upper run of the carrier. l

V14. A machineas characterized in claim 13 and further characterized in that said. track is pivo'ted to turn upon an axis coincident with the axis of one of said rolls.

15; A machine as ,characterized in claim ,13 and includingapivotally supported frame upon which one of said rolls is mounted and upon an axis coincident with. the axis of said roll.

- 16. A machine aS characterized in claim 13 andv including a pivotally supported frame upon which one of said rolls is o mounted and wherein sald track is pivotally mounted u on said frame to turn relative theretol an upon an axis coincident lwith f the axisosaid roll, andl .further including means carried by *saidftracky adapted to be operated by the deflectionv of the stock when bent by sald bending rolls, for turning said track upon its pivotal support. l

, '17. A machine as characterized in claim 13 and including a pivotally 'supported frame upon which one of said rolls is mounted and wherein said track is pivotally mountedupon saidframe to turn. relative .incidentwith the axis of said third roll,-an

carried by saidl track and in' Opposed relationto one of the bending rolls with a ortion of the stock being bent by'said ben in'g roll interposed.l between said roll carried by the track and said opposed bendingroll.

18. In a bending` machine, the combination of a bendin kroll vto enga e one side of the stock to be entya secon bendin roll opposed tothe lirst bending roll, a thir roll, an endless carrier chain assing over said second and third rolls andp adapted tol carry l thestock to be bent endwise between ,the

' means for driving 4.the carrier chain.

19.;A machine as characterized in claim 18 and includin a track forl the upper run of the carrier c ainfpivotally supported to turn upon an axis coincident with the axis of said'third roll. En.'

20. A machine-as 'characterizedin claim 18 and including a pivoted tra'ckmember for supporting the upper run "of/the carrier chain, an adjusting lframe-upon which said third roll is mounted, said frame being-pivotally supported `to 'turn upon an' axis'cov'incident with the axisof rotation oil said second roll, means rotatable upon an'axis coincident with the axis of rotation of said second roll andf around which said endless .carrierv passes, means on the free end of the trackmember' around which theendless carrier passes, and means on'said track mem- 100 beradjacent itsl pivotal support. opposing v said roll to engage said carrier chain and tilt said track member upon its pivot.

21. In a bendingmachine, the combination of a bending roll to engage one side of the stock to be bent, a second bending roll opposed to the first roll, a third roll for directing the stockto said, first and second rolls, a' frame member'pivotally supported o adjacentone end and u on which said third 110 roll is mounted, an inc'llne'd track extendini longitudinally of said frame. member, an

a carriag movable along'said track between said trac and frame member, e 22. AIn a bending machine, the combination of 'a bending roll to engage one side oir'` .the stock to be bent, a second bending rollopposed to the first roll, a third roll for directing the stockto said first and second rolls, a rame pivotally supported lat one end upon an axis coincident with the axis ofsaid se ond roll and upon which said third roll is mounted, a member forming an extended track pivotally supportedupon an axis ,co-

12! endless carrier supported by said. track member with its upper run engaging said track throu hout the length thereof, an inclined track eneath said frame, a carriage movable along Said track and engaging the lower lai said last named means, and means for driving the endless carrier.

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

.MARTIN L. PETERSON.

Witnesses:

LEWIS E. FLANDERS, ANNA M. Donn.

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