US445149A - quant - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1. J. GRANT.

MACHINE POB MAKING TIMBER RANGERS. 110.445,149. Patented Jan. 20,1891.

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(No Modef) 3 Sheets-Sheet 2. J. GRANT. MACHINE POR MAKING TIMBER RANGERS.

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J. GRANT.

MAGII'INE EOE MAKING TIMBER RANGERS.

Patented Jan. 20, 1891.

3 Sheets-Sheet 3.

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llnrrnn STATES/,PATENT OFFICE.

.IOIIN GRANT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE GRANT MANUFACTURING COMPANY, OF SAME PLACE.

MACHINE FOR MAKING TIMBER-HANGERS.

SPECIFICATON forming part of Letters Patent No. 445,149, dated January 20, 1892i.

Application tiled April 17, 1890. Serial No. 348,362. (No modelJ To all whom t may concern: of Fig. 18. Fig. 2O is an end view of the parts Be it known that I, JOHN GRANT, of Chishown in Fig. IS. Fig. 2l is a plan view of cago, in the county of Cook and State of Illithe forming-dies shown in Fig. 18 and a pronois, have invented certa-in new and useful jection on the frame which actuates said dies. 55

5 Improvements in Metal-Bending Machines; The main frame of the machine illustrated and I do hereby declare that the following is consists of a bed-plate A, provided with legs a full, clear, and exact description thereof, refor standards a5 a5, sustaining 1t in horizontal erence being had to the accompanying drawposition. The bed-plate A is provided at its ings, and to the letters of reference marked side margins with upwardly-extending Iianges 6o io thereon, which form a part of this specifica- A A', to the upper edges of which is secured tion. a flat top plate A2, the flanged bedplate and This invention relates to machines for maktop plate together forming a rectangular ing stirrup-irons or timber-hangers, such as guide-passage, Fig. 2, open at both ends. are used for connecting ceiling-joists with the Vithin said guide-passage is located a slid- 65 I5 timbers which sustain the same. ing plate or carriage B, which is given a lon- A The invention consists in the matters heregitudinal reciprocatory motion by the device inafter described, and pointed out in the aphereinafter described. In the particular conpended claims. struction shown the carriage Bis provided at In the accompanying drawings, illustrating its side margins with downwardly-extending 7o 2o a machine embodying my invention, Figure flanges b b, Fig. 3, which rest upon the bed- 1 1s a side view of the machine ready for inplate A, thereby lesseniug the area of the sertion of the blank or bar. Fig. 2 is an end parts in frictional contact. Said carriage is elevation thereof, showing machine in posialso provided in its rear or inner part with tion after completion of the hanger. Fig. 3 upwardly-extending flanges b b', which rest 75 25 is acentral longitudinal section thereof,taken and slide in contact with thetop plate A2, upon line 3 3 of Fig. 2. Fig. 4 is a plan thereand thereby hold the carriage from being of, showing machine in same position as in lifted above the bed-plate during the opera- Fig. l. Fig. 5 is an enlarged detail section tion of the machine. Reciprocatory motion taken upon line 5 5 of Fig. 2. Fig. 6 is an enis given to the carriage by means of a crank- So 3o larged sectional plan view showing workingdisk C, which is mounted on a shaft C at table nearly atthelimitof its backward niovethe rear end of the machine, and is conment, taken upon line 6 6 of Fig. Fig. 7 is nccted with the said carriage by means of a a detail section taken upon line 7 7 of Fig. G. pitman C2. Said shaft C is driven from a Fig. S is a still further enlarged section of pulley-shaft I) by means of gear-wheels D S5 35 movable clamping device. Fig. 9 is a sec- C3 on said shaftsDand C,said shaftD being tional plan view of same, taken upon line 9 9 provided with belt-pulleys d d', by means of of Fig. 8. Fig. l0 is a detail sectional view which motion is communicated to the workof device for operating the movable forminging parts of the machine. dies. Fig. ll is a sectional plan viewon line By reference to Fig. l2- it will be seen that 9o 4o ll ll of Fig. l0. Fig. lis a perspective view the stirrup iron or hanger consists of a piece of a finished hanger made by the machine. of bar-iron of great-er width than thickness, Fig.13isanenlargeddetailsection showingnand which is bent twice at right angles near ished hanger and parts of the machine enits middle to form a loop a and two parallel gaged therewith. Fig. l-l is adetail section on arms a a', each of which hasa quarter-twist 9 5 45 line la laof Figl. Figl isadetail section a2 a2, bringing the flat faces of the upper on line l5 l5 of Figa-13. Fig. 16 illustrates a parts of the arms in the same plane with the modication of t-he construction of the clamploop a. The said arms at their upper ends ing device. Fig. 17 is a detail section on line are each provided withtwo right-angled bends I7 17 of Fig. 16. Fig. lb illustrates a modia3 a4, giving a hooked form thereto. The Ioo 5o cation of the construction of the forminghanger, constructed as described, is suspenddies. Fig. 19 is a detail section on line 19 19 ed from the top of a beam by means of its hooked ends and supports a second beam lo ing the same widthas the said loop d of the hanger.

E E are two bending-rollers mounted upon studs e e, supported upon the top plate A2, and extending downwardly therefrom at either side of the path of the form-block, said rollers being located at some distance later ally from the form-block.

E E indicate another pair of bending-rollers mounted on vertical studs c c', which are also supported upon the top plate A2, said rollers EE being arranged at opposite sides of the-path of the form-block at a distance from the latter equal to the thickness of the bar of metal to be operated upon. The lower end faces of the rollers E E E E are located adjacent to the fiat top surface of the carriage B, which slides freely beneath the same. The said carriage 13 is reciprocated through such distance that the rear or inner end of the form-block l5 is carried out-wardly past the rollers E E and inwardly past the rollers Ef E', and in making the central bend in the bar'the'latter is placed acrossV the end of the form-block when it is at the outward limit of its movement with the center of the bar resting in contact with the end face of the formblock, and the loop is formed by the conjoint action of said rollers and the form-block in the rearward or inward movement of the carriage. During such movement of the carriage the end portions of the bar or blank are first brought against the rollers E E, by which the ends of the bar are bent to an angular position relatively to the sides of the form-block, and as soon as the rear end of the form-block reaches and passes between the rollers E E the end portions of the bar are pressed fiat against the sides of the form-block, thereby making two right-angled bends in the bar.

In order to prevent displacement of the blank during the movement of the carriage and form-block in the manner described, a clamp device is preferably employed to hold or clamp the middle part of the bar against the end face ofV the form-block. This clamp device :is herein shown in Figs. l to 9 made as follows: -F is a metal block or bar bolted to the top surface of the carriage at the rear of and in line with the fornrbloek, said bar being provided at its end adjacent to the form-block, with two guide-arms ff, between which slides a longitudinal clamping-jaw F, Figs. 8 and 9, said clamping-jaw being provided with a working-face opposite and parallel with the inner end of the form-block, and preferably of the same width as the said end face of the form-block. In connection with such clamping-jaw a device is provided for throwing and holding the same against the blank, so as to clamp the latter between the clamping-jaw and the end of the formblock, the same consisting, as herein shown, of a rock-shaft F2, mounted in the casting F, and provided with an eccentric F3, arranged to engage the clamping-jaw. F in such manner as to move the same toward and from the form-block when the rock-shaft is turned, said rock-shaft being provided at one end with a lever f', by which it may be rotated for tightening and loosening the clamping-jaw. In

the particular construction of the parts herein illustrated the clamping-jaw is held in place vertically by contact with the guide-arms ff, and is held from lateral displacement by means of two parallel arms f2f2, which ex tend rearwardly from the body of the clamping-jaw and engage the opposite parallel side faces of the casting F, Fig. 9. The rock-shaft F2 is herein shown as arranged vertically and mounted at its ends in the guide-arms ff, the eccentric F3 being located at the middle of the rock-shaft in a rectangular recess f3, formed in the bodyof the clamping-jaw, said jaw being provided with slots f'lfi, through which the rock-shaft passes at either side of the said recess f3. The engagement of the eccentric with opposite sides of the said recess f3, as shown in Fig. 9, gives positive movement to the clampin gj aw duringrboth its forward and backward movement and holds it at all times positively in position. The opposing faces of the form-block in the clamping-jaw F are preferably provided with lining-plates B2 F4, which are conveniently held in position by dovetailed `tongues engaging corresponding` grooves in said parts. By using thicker or thinner lining-plates provision may be made for operating upon metal bars or blanks of greater or less thickness, as desired.

The leverf may be moved by hand to effect the engagement of the clamp-jaw with and its disengagement from the blank. As a means of insuring the clamping of the blank during the bending operation, I so arrange the leverf that it will stand parallel with the path of the carriage when the clamp-jaws are closed, and place the said lever above the level of the top of the form-block, so that it will enter and pass through a longitudinal groove Ai", formed in the lower face of the top Y plate A2, Fig. 8, for the reception of said lever YVduring the back and forward movement of the carriage. Y In a construction of this kind the lever f will be actuated to automatically close the clamp-jaw against the blank, and said lever may be moved to release the blank either by hand or by an automatic actuating device. W'hen actuated by hand the lever may be thrown around to release the jaw by a hand tool; but a similar movement may be automatically accomplished by means of a spring suitably applied for the purpose. In the drawings, Fig. 8, f6 indicates a spiral IIO spring encircling the roek-shaft F2 and connected with said shaft and with the casting F, said spring being so arranged as to tend to hold the eccentric in position to retract the clamp-jaw.

In Figs. 1G and 17 I have shown another device for automatically actuating the clamppin F. In this instance the clam p-jaw is pro vided with two guide-rods]7 f7, which slide in the casting F, and springs F513 are applied to said rods in such manner as to retract the clamp-jaw or draw it toward the said casting F. Fi is a cam-plate which is adapted to swing on a transverse pivot f, secured in the casting F, said cam-plate being adapted to engage at its free end with the rear or inner face of the jaw in such mannner as to advance the jaw when the cam-plate is depressed. A spring FT is applied to lift said camplate, and the latter is so arranged that when in its elevated position its upper surface stands above the level of the top of the form-block and in position to engage the top plate A2. In the operation of the machine when thus made, when the blank is placed across the rear end of the form-block and the carriage begins its backward movement, the cam-plate F will strike the top plate A?, and will be thrust downwardly thereby so as to advance a clamp-jaw and clamp the blank. \\"hen the carriage returns to its original position, however, the cam-plate will rise under the action of the spring FT as soon as it is free from the top plate, and the clamp-jaw will thereby become automaticallly released from the blank.

The form-block 3 may be cast integral with the carriage B, or otherwise permanently secured thereto, in case the machine is in tended for making only one size of hanger. Preferably, however, said form-block is removably secured to the carriage, whereby forni-blocks of different widths may be employed when it is desired to vary the size of the loop a of the hanger. A device for detachably securing the form-block to the carriage herein shown consists of heavy integral lugs or posts B3 B", extending upwardly from the top surface of the carriage and passing through sockets or recesses b2 b3 in the form-block, the latter being held downwardly in place by means of screws h4 b1 passing through the form-block and into the carriage. The recess b2 is conveniently formed near the rear or inner end of the form-block, while the recess b3 has the form of a notch in the outeror front end of the said form-block.

The means employed for making the quarter-twists a2 a2 in the bar or blank will now be described. Said twists are made, generally speaking, by the conjoint action of two laterally-projecting forming-dies G G, extending laterally outward from the upper part of the form-block, and two cam-arms II Il, which are pivotally supported in the carriage below the form-block, and are adapted to rise toward the forming-dies G G in the act of making the twist in the bar. Said forming-dies are beveled or inclined on their rear and under surfaces to correspond generally with the inclination or curvature of the iinlished hanger at a point adjacent to the twist.

The cam-arms II H are similarly beveled or inclined upon their upper and outer surfaces 71, h to correspond with the curved surface of the hanger. Said beveled surfaces h hare furthermore arranged eccentrieally with the pivots h 71. ot' the cam-arms, as clearly shown in Fig. 7. Said cam-arms I'I swing through a distance approximately equal to a quarter of a rotation during the operation of forming the twists in the hanger, the curvature of the working-faces 7L h of the cam-arms being such that when said cam-arms are swung downwardly and are out of act-ion the camsnrfaces are entirely below the level of the top of the carriage, so that the ends of the bar or blank may swing freely over the camarms when said ends of the blank are brought against the sides of the formblock in the preliminary bending of the saine. Said calnfaces are so shaped, furthermore, that when the cam-arms are swung upwardly and rearwardly they will come approximately parallel to the inclined under surface of the formingdies G G, thereby acting, in connection with said dies, to give the desired shape or twist to the blank. It will of course be understood that the working-faces h 7L of the calnarms' are inclined inwardly and downwardly toward the form-block, so that their outer margins are highest, and thereby act to bend or carry upwardly the outer margins of the blank,as is clearly shown in the sectional view, Fig. 13. Said cam-surfaces 7L 7L terminate in flat surfaces 7b2 h2, which, when the earn-arms H H are swung upwardly to the upward limit of their movement, are horizontal and stand at a distance below the under surface of the top plate A2 of the machine equal to the thickness of the metal blank, Fig. 13. These ilat surfaces h2 h2 serve to bring the dat parts of the hanger above the twists a2 a2 in the same plane with the inner edge of the loop a, so that when the hooks are engaged with the timber the loop of the hanger will rest against the side of the timber both above and below the twists therein.

In order to provide for working upon metal of different thicknesses, removable blocks h3 h3 are secured to the cam-arms, so as to form the fiat surfaces h2 7b2, which blocks may beA removed and replaced by others of greater or less thickness, as necessary in operating the machine with thickerorthinner blanks. The said cam-arms H II are lifted for the purpose of forming the twist in the blank during the rearward or inward movement of the carriage, by contact of a roller H upon the bed-plate A with the said cam-arms, the top of said roller being arranged on a level with the top of the bed plate, so that the roller will lift the arms into a horizontal position and the lat-ter will be sustained in snch position du r IOO IIO

ing the free inward movement of thezcarriage by resting upon said bed-plate. The roller II is arranged beneath the forward end of the top plate A2, so that when the cam-arms are thrown upwardly the flat surfaces h2 h2 thereof will come beneath the top plate and will thereby bring the parts of the blank adjacent to the twists therein in the same plane with each other and with the inner edge of the loop a. Flanges h4 h4 at the inner edges of the cam-faces h h are desirably employed to engage the inner edges of the blank, and thereby prevent the same from becoming caught between the cam-arms and the formblock as the cam-arms rise.

The bending-rollers E E, hereinbefore described, aid in the bending of the blank by acting against the outer edges thereof to hold the same against the form-block. Said rollers E for this purpose are located at a distance from the sides of the form-block equal to the width of the blank. During the inward movement of the carriage, after the cam-arms have been lifted to form the twists in the blank, the end portions of the blank adjacent to the twists will be confined above and below by the cam-arms and top plate and at their inner and outer edges by contact with the formblock and rollers E E, Fig. 15, so that these portions of the blank will be closely confined or held during the inward movement of the carriage.

For the purpose of allowing adjustment of the rollers E E toward and from the formblock in operating upon wider or narrower blanks the pivot-studs e e of said rollers are mounted in blocks E2 E2, Fig. l5, secured to the front edge of the top plate A2 by adjust= able attaching devices adapted for conveniently shifting the position of said blocks horizontally. As herein shown, the top plate A2 is provided with a T-groove A2, Fig. 13, in which fit and slide T-shaped projections e2 e2 upon the said blocks E2 E2, and an oppositelyscrew-threaded shaft E2is engaged with the projections of both blocks, said shaft having a squared end by which it may be conveniently turned for adjusting the blocks. As an additional means of rigidly securing' in place the said blocks E2 E2 after the same have been adjusted by means of the shaft, bolts e2 e2, Fig. 5, having heads engaging the T-slot A3 A3, are inserted through the said blocks and provided with nuts by which the blocks. may be clamped against the end of the top plate.

The forming-dies G G, instead of being rigidly attached to the form-block, are preferably mounted thereon, so that they may be swung inwardly to allow the nished hanger to be `lifted from the form-block. For the purpose stated said dies G G may be mounted in any one of a great variety of ways. One desirable construction in said dies is herein shown, Figs. l0 and ll, which is as follows: Said dies are pivoted at their inner ends upon. vertical pivots g g, secured in the form-block, the dies being arranged with their upper surfaces flush with the top of the form-block, which latter is provided with recesses G G, adapted to receive the dies when the latter are swung about the pivots g g.

G2 is a gear-pinion mounted upon a vertical shaft g between the pivots g g of the dies,y and intermeshing with gear-segments g2 g2, formed upon the inner end of the dies, concentric with the ,pivots g g, in the manner illustrated, Fig. 11. By reason of the engagement of both of the arms with the pinion G2 when the shaft g is rotated said arms are turned or moved in opposite directions so that one arm swings toward the outer end and the other arm toward the inner end of the formblock when said arms are swung inwardlyin to their folded position, as clearly shown in the drawings. To the upper end of the shaft g is secured an actuating-lever g3, which may be moved either by hand or automatically by contact with a part of the machine to turn thedies G G. As herein shown, the lever g2 is adapted to enter the groove A5 in the under surface of the top plate, and said lever is so arranged with reference to the dies that the latter will be held in their extended or operative position when the lever is within the groove. The lever may be turned by hand to close the dies inwardly, and thus permit the iinished hanger to be lifted from the form-block; but in order to make the opera. tion of these parts entirely automatic a spring g4 may be applied to turn the shaft g in a direction to close the dies. Such spring is shown as lnade of the form of a coilsurrounding the shaft g and connected at one end with the shaft andat its opposite end with the form-block.

In Figs. 18, 19, and 2O I have shown another construction in means for actuating the forming-dies G G. In this instance G2 G3 are two rock-shafts mounted in the form-block B parallel with each other and with the sides of the form-block. The dies G G are rigidly secured to the rock-shafts, so as to turn with the latter, said dies in this construction swinging in a plane atright angles to the sides of the form-block and being adapted to move through a quarter of a circle or from a position standing horizontally out from the sides of the form-block to a vertical position extending upwardly from the top of the form-block. rIhe rock-shafts G3 G3 extend at their ends outwardly past the end of the form-block, and are there provided with rigid arms g5 g5, to which are connected the opposite ends of a spring G", acting to turn the rock-shaft in opposite directions and to hold the dies in their closed or vertical position. In a construction of this kind the dies G G are held outwardly or in position for operation by contact of their upper surfaces with the under surface of the top plate A2, said dies being located beneath said top plate at the time the upward pressure cornes thereon in the act of bending or forming the IOO IIO

hanger. The dies are opened or spread by means of a wedge-shaped or pointed projection N, located on the top-plate A2 above the form-block, the point of the projection entering between the dies and forcing the same apart as the carriage moves inwardly or rearwardly, as clearly shown in Fig. 2l.

The construction in the parts by which the double bends d3 al of the hanger are formed will now be described. Generally speaking, the said bends are formed by bending the end portions ot the blank over surfaces or dies, Figs. I and 13, attached toor tormedon the end of the top plate A2 and having flat vertical 'faces l A and horizontal top surfaces A*u A7 by means of bending-levers I I, hinged to the cam-arms Il ll, and other bendingarms J J, which are hinged to the bendinglevers I I, the bending-levers I I being arranged to press the blank against the sur- `faces l A, while the bending-arms J J are adapted to bring the ends of the blank against the horizontal surfaces AIM A". To first describe the construction and operation of the bending-levers I I, said levers are hinged by means of horizontal pivots t' t to the outer or forward ends of the cam-arms ll ll, the said bending-levers being provided adjacent to the said cam-arms with fiat working-faces t" t', adapted to come into position parallel with the vertical faces AGAG of the top plate when the said bending-levers are swung upwardly into vertical position or at right angles to the cam-arms, the said bending-surface being extended outwardly past or above the said surface t '17, for the purpose hereinafter described. The said bending-levers I are furthermore provided with arms I I', extending from the lower or inner sides of the pivots yl', and adapted for engagement with a cam or wiper K, which is mounted upon a horizontal shaft K', located beneath the bed-plate ot' the machine. Said shaft K is driven by a spur-wheel K2, intermeshin g with the gear-wheels D', heretofore described. The cam or wiper K is so located and actuated as to strike the arms I I of the bending-levers and throw said bending-levers upwardly into a vertical position after the inward movement of the carriage B has ceased. lVhen said carriage has completed its inward movement and twists have been formed in the blank by the action ot' the cam-arms II Il and forming-dies G G, as hereinbetorc described, the ilat parts of the hanger will be held by the said cam-arms, the top plate, the formblock, and the rollers E E in position parallel with each other, with their ilat sides horizontal and projecting outwardly from beneath the top plate, their ends at this time standing over the surfaces 11 t" of the bending-levers. .Vhen said bending-levers are thrown upwardly, therefore, they will actupon t-he ends of the blank, to bend the same upwardly and bring them into contact with the ilat vertical faces A A ot the opposing dies in an obvious manner. By the movement of the bending-levers in the manner described, the right-angled bends a3 a3 will be formed.

The iinal movement by which the bends a4 a" are made is accomplished by means as tollows: The bending-arms JJ are connected by pivots j j with the bending-levers I I, and said bending-arms are adapted to swing upon the said pivots in such manner that they may be placed either at right angles to the levers or thrown outwardly at an angle. thereto and into the position shown in Fig. l. During the upward movement of the bending-levers I I the said arms J J stand at an angle to the arms, as shown in Fig. l; but when said bending-levers are near the end ot their movement said arms J J are thrust downwardly into position at right angles to the bendinglevers and above and parallel with the top surfaces Al' A? of the dies, so as to bring the extreme ends of the blank against the said top surfaces.

The movement of the arms J J in the manner described is accomplished by means as follows: L L are levers pivoted at points between their ends, by means of pivot-pins Z, to laterally-projecting lugs 'if i3 on the levers I. Said levers L are connected with the free ends of the arms J by means of links` L. Springs Z2 are applied to throw the outer ends of the levers L L away from the bending-levers I I, so as to hold the arms J J normally outward or at an angle with the bending-levers, this position of the parts being shown in Fig. l. M is a horizontal bar mounted upon standards M M at a considerable distance above the top plate A2 of the machine, said bar M being so located that it will be encountered by the outer ends of the levers yL L when the bending-levers I I are swung upwardly into a vertical position. The said bar M is disposed in such position relatively to the said levers L L that said levers will strike the bar shortly before the bending-levers I I reach their vertical position, so that said levers L will be actuated to thrust the bending-arms J J downwardly during the last part of the movement of the said bending-levers, and so as to bring the said arms J J into a horizontal position at the termination of the movement ot' said bending-levers.

It follows from the construction described that when the bending-levers I I are thrown upwardly by the action of the cam or wiper K both ot' the right-angled bonds d3 d, torming the hooks, will be automatically made.

After the bending of the blank has been accomplished inthe manner above described, the wiper K will pass the arms I I of the bending-levers I I, thereby allowing the said bending-levers to fall in the horizontal position shown in Fig. l, after which the return movement of the carriage will take place, allowing the cam-arms II II to fall into a vertical position, and thereby releasing the iinished hanger, which at the termination of the forward movement of the carriage may be lifted from the form-block after the die G G IOO have been turned or moved to free the hanger, inthe mannerherei nbefore described.

In order to enable the machine to be adjusted for making the distance between the bends a3 c4 greater or less, and thereby making the hooks wider or narrower, the parts are constructed as follows: The lugs i2 ft2, instead of being permanently secured to the levers I I, are connected therewith by means of bolts 'i3 th, and the levers are provided with additional bolt-holes, as fi, and one or more additional apertures i5 are provided for receiving' the pivotsjj of the arms JJ. By the construction described the said hooks may be made of as manydiiiferent widths as there are sets of bolt holes and apertures for securing the lugs t2 and pivots jj to the bending'- arms. lVhen the position of the bendingarms J J is changed in the manner described,

it is obviously necessary to change the width of the vertical faces AG A, over which the ends of the blank are bent. For this purpose said surfaces AG AG are formed on or by removable die-blocks AS A2, held in place by the bolts A9, which enter and engage the T- grooves A3 of the top plate A2, Fig. 15. lVhen the said bendingarmsJ J and leversL L are shifted in position in the manner described, it is further necessary to change the vertical position of the bar M, and for this purpose said bar is held at its ends in the vertical slots m lm by means of clamp-nuts m m', which maybe loosened to allow the bar to be shifted vertically. In order to provide an accurate adjustment of the parts, so that the bending-arms J J may be moved to exactly the right extent, the bar M isf'pieferably provided with eccentric ends or trunnions m2 m2, engaging the slots m m, so that by turning the bar its part or surface which strikes the levers L L may be shifted back or forth desired. 1

In order to hold the ends of the blank accurately in vertical position during the time they are being bent upwardly by the action of the bending-levers, vertical guide-surfaces are located at the opposite sides of the worki iig-faces AVIAG in such the-side edges of the blanks, said guide-surfaces bein g arranged at a distance apart equal to the width of the blank. The guides for the outer edges of the blank are herein shown as formed by the inner surfaces of the blocks E2 E2which support the rollers E E. Said Vinner faces of the blanks are of course located vertically in alignment with the inner surfaces of the said rollers E E, it obviously being necessary that the said guidesurfaces should be located the same distance from the vertical side faces of the form-block as the said rollers-t0 wit, a distance equal to the width of the blank. The guide-surfaces for the inner edges of the blank are formed by the side of the projection or guide-block N, Figs. 2, 3, 4, and 15, which is preferably made separate from the top plate and secured to the said top plate between the said surpositionV as to engage' faces AG AG, the side faces of the said block being" dcsirably curved or rounded in the manner shown. When the form of movable forming-dies G G shown in Figs. 18, 19, 20, and 2l is used, said projection N will be made of wedge shape and pointed at its lower part, so as to enter between and open the dies, as hereinbefore set forth.

In order to provide for making hangers having central loops of different widths, it is obviousl y necessary that the projection or guideblock N should be changed to correspond in width with the form-block I3', and when the said form-block is changed or when a wider or narrower blank is used it is necessary that the external guide surfaces formed by the blocks E2 E2 should also be moved. I provide for change in the Width of the guide@ blockN by'making said block detachable, the same being secured in place,as herein shown, Fig. 3, by means of a bolt passing through the block and having a head at its inner end which engages the T-groove As of the top plate A2. Said guideeblock can therefore be removed and a wider or narrower one substituted, as may be necessary or desirable. rlhe external guide-surfaces formed by the blocks E2 E2 will of course come in proper position for engagement with the said edges of the blank when the rollers E E are placed at a proper distance from the form-block to also engage the external side edges of the blank in the manner heretofore described.

In operating upon blanks of different thicknesses it is obviously necessary to shift the rollers E E toward and from the form-block, and for this purpose I adjustabl y secure the studs e e of said rollers in transverse slots c a in the top plate A2, Fig. 4, and in order to enable said studs to be easily shifted, a screw-shaft ai is inserted through the top plate and provided with oppositely-directed screw-threads engaging the said studs, said shaft having a squared end at one side of the top plate by which it may be turned by the application of a suitable tool.

It is obviously desirable that means should 'be'provided for accurately determining the position of the straight blank when putting the same in the machine, so that the ends of the same will come in proper position after the blank is bent. For this purpose I attach to the sides of the frame two outwardly-extending horizontal arms O O, Fig. 4, and place upon the same two adjustable gages 0 0, which extend vertically upward in position to engage the ends of the straight blank when the latter is placed across the rear end of the form-block in the manner hereinbefore de scribed. The position of the said blank when placed in the machine is indicated in full lines in said Fig, 4.

I claim as my invention- 1. The combination, with a reciprocating form-block, of two stationary bending-rolls located at opposite sides of the formlblock and two other bending-rolls located at oppo- IOO IIO

IIS

ISO

site sides of the formblock and at a distance therefrom equal to the thickness of the bar to be bent, substantially as described.

2. The combination, with a reciprocating form-block, a movable carriage supporting the latter, and bending-rollers located at opposite sides of the form -bloek, of tormingdies mounted upon the part of the form-block remote from the carriage and movably connected with said form-block, and means upon the carriage acting in connection with said forming-dies to give a twisted form to the blank, substantially as described.

The combination, with a reciprocating for1nblock,a movable carriage supporting the latter, and bending-rollers located at opposite sides of the form-block, of two forming-dies mounted upon the part of the form-block remote from the carriage and extending later- `ally at opposite sides of the form-block, said forming-dies heilig pivotally connected with the form-block, and means upon the carriage acting in connection with said forming-dies to give a twisted form to the blank, substantially as described.

a. The combination, with a reciprocating carriage and a form-block thereon, of stationary binding-rollers, forming-dies mounted on the form-block and extending laterally from opposite sides thereof, and cam-arms pivotally supported upon the carriage and operating in connection with the said forming-dies to give a twisted form tothe blank, substantially as described.

5. The combination, with a reciprocating carriage, a form-block thereon, and stationary beiiding-rollers, of forming-dies mounted on the block and extending later-ally at opposite sides thereof, cam-arms mounted on the carriage and operating in connection with the said forming-dies to give a twisted form to the blank, and a stationary part or roller adapted for contact with the said cam-arms, by which the latter are actuated during the movement of the carriage, substantially as described.

6. The combination, with a form-block and bending-rollers operatingin connection therewith to make a central bend or loop in the blank, of forming-dies mounted on the formblock and extending laterally from opposite sides thereof, cam-arrns operating in connection with said forming-dies to give a twisted form to the blank, bending-levers pivoted to the ends of said cam-arms, and stationary surfaces or dies opposed to said bending-levers, substantially as described.

7. The combination,with a form-block and bending-rollers operating in connection therewith to make a central bend or loop in the blank, of forming-dies mounted on the forinblock and extending laterally from opposite sides thereof, cam-arms operating in connection with said forming-dies to give a twisted form to the blank, bendingdevers pivoted to the ends of said cam-arms,bending-arms pivoted to the said bending-levers, and stationary surfaces or dies opposed to said bendinglevers. substantially as described.

8. The combination of a form-block, bending rollers operating in connection therewith to make a central bend or loop in the blank, forming-dies mounted on the forinblock and extending laterally from opposite sides thereof, cam-arms operating in connection with said forming-dies to givea twisted form to the blank, bending-levers pivoted to the ends of said cam-arms, and a revolving cam or wiper for actuating said bending-levers, substantially as described.

O. The combination of a reciprocating earriage, a form-block mounted thereon, stationary bending-rollers operating' in connection with the form-block to make a central loop in the blank, forming-dies mounted upon the form-block and extending laterally at opposite sides thereof, cam-arms mounted upon the carriage and operatingin connection with said forming-dies to give a twisted form to the blank, stationary parts or rollers foractuating said cam-arms, bending-levers pivoted to the ends of said cam-arms, and a revolving cam-or wiper actuating said bending-levers, substantially as described.

10. rlhe combination of a reciprocating carriage, a for1n block mounted thereon, stationary bending-rollers operating in connection with the fornrblock to make a central loopin the blank, forming'dies mounted upon the form-block and extending laterally at opposite sides thereof, cam-arms mounted upon the carriage and operatingin connection with said forming-dies to give a twisted form to the blank, stationary parts or rollers for actuating said cam-arins, bending-levers pivoted to the end of said cam-arms, a revolving cam or wiper actuating said bending-levers, bending-arms pivoted to the outer parts of said ben din g-levers, actuating-levers pivoted upon the bending-levers and connected with the said bending-arms, and a stationary part or barupon the machine-frame adapted for contact with said actuating-levers, whereby the said bending-arms are moved, substantially as described.

ll. The combination, with a reciprocating carriage and a form-block mounted thereon, of stationary bending-rollers located at opposite sides of the torm-block at a distance therefrom equal to the thickness of the blank, forming-dies mounted upon the form-block and extending laterally from opposite sides thereof, cam-arms pivoted to the carriage and operating in connection with said formingdics to give a twisted form to the blank, and other stationary bending-rollers located at 0pposite sides of the form-block at a distance therefrom equal to the width of the blank, substantially as described.

19. The combination, with a reciprocating carriage and a form-block mounted thereon, of stationary bending-rollers located at opposite sides of the form-block at a distance therefrom equa-l to the thickness of the blank,

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forming-dies mounted upon the form-block and extending laterally from opposite sides thereof, cam-arms pivoted to the carriage and operating in connection with said formingdies to givea twisted form to the bla-nk,othcr stationary bending-rollers located at opposite sides ofthe form-block at a distance therefrom equal to the width ot' the blank, and bending-levers pivoted to the ends of the cam-arms, substantially as described.

13. The combination, with a reciprocating form-block and bending-rollers operating in connection therewith to form a central loop in the blank, of a clamping device for holding the blank against the end of the forni-block, a lever for actuating said clamping device, and a stationary part of or upon the machine-frame adapted for engagement with said lever during the reciprocatory movement of the block, whereby the clamp is autolnatical ly actuated, su bstantiallyas described.

14. The combination, with a reciprocatingq form-block and bending-rollers operating in connection therewith to form a central loop in the blank, of clamping device for holding the blank against the end of the form-block, a lever for actuating said clamping device, and a stationary part of or upon the machine-frame adapted for engagement with said lever during the reciprocatory movement o1" the block, whereby the clamp is automatically actuated, and a spring for releasing the clamp, substantially as describef.

15. The combination of a reciprocating form-block, bending-rollers operating in connection therewith, forming-dies mounted on and extending laterally from opposite sides of the form-block, and cam-arms operating in connection with said forming-dies, said forming-dies being niovablyconnected with the form-block, and a stationary part of or upon the machine-frame engaging said formingdies or a part connected therewith during the reciprocation of the form-block, whereby said formingdies are moved or shifted into op- 'erative position, substantially as described.

1G. The combination,with a machine-frame, a reciprocating form-block, and bending-rollers operating in connection therewith, of forming-dies pivotally connected with the form-block,.cam-arms operating in connection with said forming-dies to give a twisted form to the blank, an actuating-lever connected With said forming-dies, and a part of or upon the machine-frame adapted to engage said actuating-lever to move the forming-dies during the reciprocation of the form-block, substantially as described.

In testimony that I claim the foregoing as my invention I affix my signature in presence of two witnesses.

JOHN GRANT.

Vitnesses:

C. CLARENCE POOLE, GEORGE W. HIGGINS, Jr.

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