US1354336A - Wire-drawing machine - Google Patents

Description

W. D. PIERSON. WIRE nmwma mcmns.

. APPLICATION FILED MAR. l3. I9l9- 1,354,336, Patentedsept- 28, 1920.

3 SHEETS-SHEET l.

' IIIVENTOR 4 TTORIEY W. D. PIERSON.

WIRE DRAWING MACHINE.

APPLICATION FILED mm. 13. I9I9.

Patented Sept. 28, 192 0.

3 SHEETS-SHEET 2.

INVENTOR MMfl'erm I'M mom 1 W. D. PIERSON. WIRE nmwma MACHINE.

1,354,336. APPLICATION FILED IAR. I3. 1919. 28

3 SHEETS-SHEET 3- UNITED STATES PATENT OFFICE.

WILLIAM D. PIERSON, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATER- IBURY FARREL FOUNDRY & NECTICUT.

MACHINE COMPANY, A CORPORATION or CoN- WIRE-DRAWING MACHINE.

Specification of Letters Patent.

Patented Sept. 28, 1920.

Application filed March 13, 1919. Serial No. 282,899.

To all whom it may ooncm n- I Be it known that I, WIIJLIAM D. PmRsoN,

a citizefi of the United States of America,

and a resident of Waterbury, county of New Haven, and State of Connecticut, have invented certain new and useful Improveaction of treadle bar 34 ments in Wire-Drawing Machines, the prinin the following description and accompanying drawings, wherein is disclosed the form of the invention which I now consider to be the best of the various forms in which said principles of the invention may be embodied.

This invention relates to improvements in wire-drawing machines or benches and involves improvements particularly upon the wire-drawing machine of United States Patent No; 1,025,421 of May 7, 1912. The invention comprises block-braking apparatus cooperating with the apparatus of the machine of the above patent for automatically releasing ft he clutch from the wiredrawing block, and in minor features of construction of said apparatus including the brake itself. The invention hereof may be used in various modifications of wire-drawing machines other than that of said prior patent.

Of the drawings, which show the machine of said prior patent with the invention hereof embodied thererhTRigure 1 is a plan and Fig. 2 a front elevation of the relevant parts of the machine showing the rotatable wiredrawing block or wire-winding drum 11 with inclosing top cover 48 and bottom flange 101; also the table 1 on which are mounted said block 11 and the die-holder X; said table 1 being supported by legs 2 (Fig. 5). Fig. v3 is a plan View showing certain novel details of the apparatus for tripping or releasing the power clutch mechanlsm in.-

closed in block 11 of'Fi s1 and 2, through which in turn operates the brake motion on the Wire drawing block, see Figs. 5 to 10. (A front elevation of said tripping apparatus of Fig. 3 is shown in Fig. 2).

Fig. 4 is a side elevation of part of the tripping mechanism of Figs. and 3, sald part illustrating also the operation of "the controlling treadle 34X by the tripping mechanism, this treadle being the same controlling part by which the internal coil clutch and the brake are applied alternately to block 11 as shown in Fig. 5

Fig. 5 is a transverse Vertical section through the entire machine (save block 11 wherein the clutch mechanism is shown in dotted lines) showin the operating treadle or control lever 34 (which is also shown in Fig. 7 and partially in Fig. 2), and showmg also the connections whereby said treadle operates the coil-clutch 15 inclosed in block 11, and the connections whereby said treadle operates the brake 100 shown in transverse vertical section at the upper right of the Fig. 6 is a rear elevation of the mechanlsm of Fig. 5 showing the details of the brake of Fig. 5 in section atthe upper part.

Fig. 7 is a plan partly in section of the treadle or control lever 34X of Figs. 2 and 5, together with the supports for this treadle and for the parts operated by it.

Fig. 8 is a plan of the brakev with cover removed to show the'inside brakingmechanism shown also in Figs. 5 and 6.

Fig. 9 is a horizontal section of the arrangement of pin 86 of Fig. 5; and

Fig. 10 is a horizontal section of the arrangement of pin 75 of Fig. 5.

Figs. 11 and 12 illustrate a modified construction of the brake having an operation similar to the construction shown in the Figs. 5, 6 and 8, this construction being preferable in some cases.

The driving means (shown in Fig; 5 center from top to bottom) for the wire-drawing block 11 may be and is indicated as the same as in said prior patent. It is described briefly hereinafter. In this invention the controllever or treadle bar 34X (Figs. 5, 2 and 7) is the mid-point of the system of control connections for power and brake. The two ends of said system controlled by treadle 34X are (1) the brake 100 (Fig; 5 upper right) and (2) the die holder 55 r of Figs. 1 and 2 starting with the treadle 34X as the mid-point between the two as shown at the pulled to the htand coiled around block 11 in its anti-c ockwise rotation indicated by arrow. (The wire-grip is shown at 51 in said prior patent). The connections by which the tripping mechanism of Fig. 2 operates to automatically disconnect the power from and apply the brake to the block 11 are shown in Fig. 5 and include treadle bar 34X and parts above it. j

- The object of the invention is to provide a practical tripping and braking combination whereby the release of the drawing strain on die-holder 55X will result automatically in a disconnection of the driving means from the rotatable drawing-block or drum 11 and will result in the braking of said block; and also to provide a construction permitting the brake to be released by the operator either with or without applying the power to rotate said block 11.

The block or drum 11 is shown in Figs. 1, 2 and 5, and the die-holder 55X in Figs. 1 and 2. The drawing strain on die-holder 55X is released either when the last of the wire has been drawn through the die or when the wire itself breaks in two. The block 11 (with the parts inside and moving with it) is quite heavy and in its, operating rotation has considerable moment of inertia so that when it is cut off from the driving mechanism of Fig. 5 by the tripping mechanism of Fig. 2, it rotates freely unless braked, carrying with it the Wire-grip which flies out from the block and also the projecting length of wire which thrashes around during the continued rotation of the block and is liable to result in injury to the operator or cause serious entanglement. The brake hereof. and its connections for automatic and manual operation are designed to apply the brake immediately ('Fig. 5) to flange 101 of rotating block 11 in order to prevent the above evils and they also constitute further improvements.

For simplicity the reference number system used herein, is as follows. Numbers up to andincluding 73 indicate that the parts to which they are applied correspond generally in function with the parts of said prior'patent which are numbered likewise; and of such numbers those followed by an X indicate a modification of structure; and those numbers which are not followed by an X indicate both structure and function as before. Certain numbers up to 73 are omitted thereby indicating that parts in the prior patent so numbered are not here used.

Numbers higher than 7 3 indicate parts herein which are additional to, anything shown in the prior patent.

First consider the tripping connections on Figs. 1 and 2, whereby the movement of the die-holder operates treadle 34X to disengage the power and apply the brake. In Fig. 1

on line O-116O) and Fig. 2 (on'line 57-O'), die holder 55X is shown in full lines in its drawing or operating position, i. 6. with the wire tangent to the block Fig. 1, and-(Fig. 2) against the shoulder of block-flange 101. The approximate starting position of said die-holder 55X is (Fig. 1) along line S116S, and (Fig. 2) along line S'57S. The die-holder 55X has both horizontal movement (Fig. 1) and vertical movement (Fig. 2). It is held in its operating positions (O116-O, Fig. 1 and O-57-'-O, Fig. 2) by the drawing tension of the wire which is pulled through the die by the rotation of block 11. When the last or a broken end of the wire has been pulled through the die toward the right, to block 11, so that the drawing tension of die-holder 55X is removed, the weight 107, suitably located a on horizontal lever 106 to overbalance the Weight of die-holder 55X with its die, etc., pulls down slide 110 ('Fig. 2), horizontal lever 106 moving from its operating position. 104O to starting position 104-S. The location of starting position 104-.S is established by adjustment of screw 59 (Fig. 2) in lug 60 on die-holder 55X, that is, the upward motion of the die-holder is stopped when this screw hits against the upper lug of bracket 58X. This limitin upper position corresponds to line S57 in Fig. 2.

At 105 (Fig. 2) the horizontal rod 106 is received by a socket in the end of bell-crank lever 102 pivoted at 104 to supporting plate 37X of the machine. (This plate is shown in edge view in Figs. 4 and 5 and in horizontal section in Fig. 7). Weight 107 depresses rod 106 operating on its pivot 104. In Fig. 2 bell crank lever 102 is shown in the position corresponding with the drawing or operating position of the other movable parts in the figure, its lower end being connected by pin 103 with a rocking lever 69X pivoted in plate37X at 68X. The lower end of lever 69X is provided with a screw 70 held in readiness to push treadle 34X to the left by the automatic tripping operation so that said treadle is pushed out of engage ment under horizontal shoulder 40 of verti cal slot 39. In the drawing operation of the machine the treadle 34X is held under said shoulder 40 by a spring pulling upwardly (41 in Fig. 5). In Fig. 2.t he depression of horizontal rod 106 to the starting position S104' moves bell crank lever 102 on its pivot 104 so that its lower end moves to the right. This rocks lever 69X on its pivot 39 up which it also'results in the braking 68X so that its lower end moves to. the left and screw 70 engages treadle 34X and ,the latter is forced to the left into vertical slot is pulled by s ring 41 into its uppe r position 34X of ig. 2, which position corresponds with the starting positions S of the parts above specified. This upward movement of treadle 34X results in the disconnection of the driving means shownin Fig.5 from block 11, and of said block as the result of the consequent operation of the connections from treadle 34X shown in Fig. 5 and now to be described.

In Fig. 5 is shown treadle 34X having a vertical motion in slot 39 (Figs. 2 and 5) in supporting plate 37X, this being the plate on which in Fig. 2 bell crank lever 102 and rocking lever 69X are pivoted. In Fig. 5 treadle 34X is end at 84 to a leg or support 2 of the machine. Treadle 34X has two sets of operating connections, one to the driving means for block 11 inside the same (dotted lines) and the other to brake 100 which is applied to the periphery of flange on base 101 of block 11. Treadle 34X in its lowermost position causes the continuous application of the driving power to rotate block 11.. This is the position of the treadle indicated at O -84, which corresponds to the drawing or, operating positions of the parts shown in Figs. 1 and 2 and there also indicated by the lines lettered O. In Fig. 5 the connections from treadle 34X to the coil clutch driving apparatus are the'turn-buckle 36X having its lower end connected to treadle lever 34X and, its upper end connected to the fork lever32X, the latter and all the rest of the power apparatus being, if desired, of the same form as in said prior patent and operating to rotate drawing-block 11 by means of coil clutch 15 inside said block, the power being applied'from main shaft 5, gear 9 thereon and gear 8 on vertical shaft 7. When treadle 34X is in its lowermost position O84 (when it is held under shoulder 40) drawing block 11 is being rotated by coil clutch-15 which is held in its clutching position by the connections from treadle 34X, which include turnbuckle 36X lever 32X etc. As in said prior patent the fork-lever 32X is hinged at 33 to a leg or support 2 of the machine, and it operates the coil clutch 15 in block 11 by the mechanism shown in detail in said prior-patent and shownhere generally in dotted lines in Fig. 5 as follows: Lever 32X is forked to receive pins 31, which project from a part rotatably connected with hub 27 secured by pintle 28 to vertical rod 23 which reciprocates in the hollow interior of power shaft 7. Rod23 extends up through the top of continuously rotating shaft 7 and at upper end of said shaft isa plate 24 secured pivoted at its extreme right to the upper end of. rod rotate with shaft 7. When .rod 23 is pulled down inside shaft 7 by the depression of treadle 34X to its position'O84, said rod 23 depresses plate'24 sliding on shaft 7 to engage a lever 19 and thereby cause coil 15 to clutch hub 14 which is fixed to shaft 7 coil 15 being fixed to block 11 so that now shaft 7 is clutched via coil 15 to block 11 and causes the rotation of the latter. The clutch-operating position of fork lever 32X is indicated in Fig. 5 by the line O33. The positions of the parts shown in Fig. 5 are those corresponding to the non-wiredrawing condition of the machine which is at rest save for the driving mechanism as far as and including shaft 7. For example, fork-liver 32X is shown in its position ready to start operation of the machine, this position being indicated at S33. But its position which corresponds with the positions of the parts shown in Figs. 1 and 2 is at O-33 Fig. 5, and the corresponding position of the treadle 34X is its lowest indicated at 0-84 in Fig. 5.

s soon as treadle 34X has been forced to the left (Fig. 2) from its lowest position in vertical slot 39 under shoulder 40, its spring 41 (Fig. 5) pulls it up through slot 39. At this time fork-lever 32X is pulled up to the position shown in F ig. 5 by means of itsspring 78, which is secured at 80 to a downward projection added to lever 32X for the purpose of receiving said spring 78 at the proper point. Connection 36X between tradle 34X and fork lever 32X is in the form of a turn-buckle, in order to permit of adjustment. These modifications and also the middle bend in treadle lever 34X for the purpose of clearing the main shaft 5 and'its bearings are all made in relation to the braking apparatus.

For clearness, Figs.- 1 and 2 which show the drawing operation positions of die-holder 55X and its associated parts when the brake is not applied. Similarly in Fig. 5 the wire-drawing parts (die-holder 55X etc.) are omitted for clearness because they are not in operation when the brake is applied as shown in this Fig. 5. That the brake isapplied in Fig. 5 is indicated by the fact that tradle 34X is in its uppermost position indicated by 23 and mounted to brake 100 is not shown in line A84, the power being disconnected from block 11 when treadle 34X is in its uppermost position.

In Fig. 5 coil-clutch 15 is shown as remost treadle position along lines lettered A of the connection between treadle bar 34X and the brake as follows: At the right, at 82 in treadle lever 34X is pivoted the lower end of a turnbuckle 83,-the upper end of which is pivoted at 81 to a lever 85 the other or left end of.which is keyed fast to a stud or pin 86, which is mounted to oscillate in leg or support 2 of the machine (for details see Fig. 9). To said oscillating stud 86 is keyed fast a lever 87, which extends upwardly through table 1 to the braking mechanism mounted on top of table 1, and shown in section. The above parts in the position shown permit a spring application of the brake toward the left against bottom flange 101 of block 11 these positions of the operating levers being indicated by the line A- 86-*A. The line O86-O indicates the positions of the above connections for the extreme withdrawn position of the brake which positions corres ond with the lower- 6 84-.-O corresponding to the drawing operation of the machine as shown in Figs. 1 and 2, when the dieholder 55X (Figs. 1 and 2) is in its drawing position wherein the end of the system operated by the die-holder 55X (see screw 70, Fig. 2, lower right hand) remains at the right to permit treadle 34X to remain beneath shoulder A0 and hold the brake in its released position.

The intermediate position of treadle 34X and of the brake connections in Fig. 5, all lettered B, will now be described. The reason for these intermediate positions is the desirability of permitting the operator in preparing to start the machine, to release the brake before connecting block 11 with the power mechanism which rotates it. If the brake be released while the first end of the wire is being secured in the grip of block 11, the operator can manually turn block 11 and swing it around to the position most convenient for him to fasten the wire in the grip in block 11. During this time die-holder 55X and its connections remain in their upper positions along the lines lettered S in'Fig. 2, screw (Fig. 2 lower right hand) being then located to the left of its position shown, 71. 6., extending into the space shown as occupied by the lower position of treadle 34X. In order to change treadle 34X from its intermediate position B-84 (Fig. 5) the operator depresses it until latch 119, pressed toward the right by the operators toe, is engaged by its lug 120 in a small supplementary slot 123 (Flgs. 5

. and 2) at the top of vertical slot 39 in supporting plate 37X. Spring 41 now holds the parts in this position; the operator can draw his foot from the tread 124 of treadle bar 34X and attend to securing the wire end in the grip of block 11. During said partway depi" ession of treadle 34X the driving means has not yet been connected to block 11 to rotate it, forthe reason that the turn buckle connection 36X has a loose connection with treadle bar 34X consisting of a pin in the treadle bar which plays in a slot 76 in turn-buckle 36X (for details see Fig. 10),- a set screw 118 adjusting the extent of looseness of this connection. Hence, with both power and brake disconnected, the operator can move block 11 freely while gripping the first end of the wire to it.

After the operator has completed the gripping of the wire to block 11, he may start the machine by further depression of treadle 34X fromits intermediate position B84, Fig. 5, down to its lowest position 0-84, which corresponds with, the O positions of all the parts so marked inFigs. 1, 2, and 5. The small top slot 123 for lug 120 of latch 119 is curved on its lower side (Figs. 5 and 2) so that as treadle 34X goes down, the lug 120 goes down with it; and

as lug 120 moves down, it also moves to the,

left under action of spring 122, the whole latch 119 swinging to the left on its pivot 121 and against the tread 124: of treadle bar 34X. (On this occasion of the operation of treadle 34X, the operators toe is, of course, not pressed against latch 119.)

As treadle 3 1K now goes down toward its lowest position 0-84 its pin 7 5 engages the screw 118 in the lower end of the slot 76 in turn-buckle 36X and by the operation of the latter the driving mechanism is clutched to operate block 11 as described above, whereupon the wire to be drawn is put under tension die-holder 55X is moved into its drawing position 0 (Figs. 1 and 2) and the various connections of Fig. 2 described are operated by said movement of the clieholder with the result that screw 70 (Fig. 2 lower right) moves to the right into the position in which it is shown, being moved out from under shoulder 40 so that treadle 34X is free to be shoved by the operator sidewise from vertical slot 39 tothe right to engage under shoulder 40. At this point the machine is left to its operation until such time as the drawing of the wire' is completed, or until the wire breaks, whereupon the above described cycle of operations is repeated, beginning with the automatic disconnection of the driving power and the automatic applir L v I plied to block 11, this being the period of time when the operator is gripping the wire to block 11.

Construction of die-holder, eta. I

These are ,the features shown in Figs. 1-4.

As shown in Fig. 2 the drawing-die marked Die is held against arms 54 of die-holder 55X by a screw operated by wheel 127. It is tliroughthis die that the operator threads the pointed end of the wire which is then passed on to the grip in block 11. During the period when treadle 34X is in its intermediate position B84, Fig. 5, the die-holder 55X is in starting position S116S, Figs. 1 and 2, that is, after the wire has been gripped in block 11. When treadle 34X thereafter is depressed to its lowest point O-84 Fig. 5, then block 11 pulls the wire taut which pulls die-holder 55X around (Fig. 1) until it occupies the drawing or operating position O116O tangent to rotating block 11. To permit this movement die-holder 55X is secured to swivel block 56 (Fig. 2) centered on vertical pin 116 (Figs. 1 and 2) in bracket 58X adjustably secured to table 1 of the machine. The securing of die-holder 55X to swivel block 56 is by means of horizontal pivot 57, in block 56 whereby when the wire under tension swings the die-holder around on vertical pivot 116 (Fig. 1) it also pulls it down around pivot 57 (Fig. 2) into its drawing position 'O57O in Fig. 2. Hence die-holder 55X has the ability to move in two directions which is utilized in starting the machine as shown in Figs. 1

' and 2.

1 and 2) 55X to move vertically controls the dis- The following is the construction (Figs. whereby the ability of die-holder connection of power from block 11 and the application of the brake thereto by means of the connections in Figs. 2 and 5 hereinbefore described. The fixed bracket 58X (Fig. 2) is H-shaped, having top and bottom pairs of lugs 113 extending to the left. The vertical space between said lugs is occupied by vertical slide 110 which projects down through hole 117 in table 1 of the machine. A pin 111 extends through the portion of slide 110 which lies between the upper and lower pairs of lugs 113 on fixed bracket 58X. The ends of said pin 111 are mounted in the ends of two arms 115 of die-holder 55X. Said arms 115 are spaced apart (Fig. 1) so as to straddle fixed bracket 58X, and this construction permits the operator when threading the end of the wire through the die to manually swing the die-holder freely toward him (without interference from fixed bracket 58X) and beyond the die-holders drawing position 0-116-0 of Fig. 1 and 55X drops down and causes a position most convenient. for the opera-- tor. Then after having threaded the'wire through the die, the operator may swing back the die-holder to permit him to grip to block 11 the end of the wire rojecting through the die to the right. The vertical slide 110 (F i 2) is held in place between the pairs of lugs 113 byvertical cover 114. Pin 111 in the ends of die-holder arms 115 moves up and down in the vertical space between the up er and lower pairs of bracket lugs 113. '1 112 in vertical slide 110 which receives pin 111 allows for the slight horizontal movement of said pin when die-holder 55X swings vertically on its horizontal pivot 57 (Fig. 2). The lower end of slide 110 carries a pin 109 engaging in a slot in horizontal rod 106, this permitting an adjustment of fixed bracket 58X to right or left along table 1 in order to place the die end of the die-holder 55X the desired distance from the grip in block 11. Horizontal rod 106 carries a weight 107 adjutable along its length and held thereto by set screw 108.

vIn the normal or drawing operation of the machine, weight 107 is tion shown, by the wire being drawn, which acts through the parts above described, but as soon as the drawing of the wire has been completed, or in case the wire breaks, then weight 107 counter-balancing die-holder the arts to assume their starting positions (Figs. 1 and 2) by way of the pulling down of slide 110 and pin 111 and the vertica l swinging of die-holder 55X on its iidrizontal pivot 57. This operation moves the parts at the lower right in Fig. 2, as above described, so that the screw pushes treadle 34X to the left out of engagement under shoulder 40 with the result that the power is disconnected from and the brake applied to the rotating block 11. 1

Some operators prefer shoulder 40 (Fig. 2) on the opposite or left hand side of a vertical slot 39 in plate 37X. For such cases a re-arrangement of the levers can be easily made which will produce a motion of screw 70 to the right instead of the left, in order to kick out the treadle bar 34X from shoulder 40. In such arrangement latch 119 (Figs. 2 and 5) and supplementary shoulder 123 will be located on the opposite side, together with such other minor details as are required for this arrangement. Otherwise the same motion of die-holder 55X weight 107 on bar 106, and the brake details are maintained as before, being proheld up in the posiduced by pressing down the foot treadle he horizontal slot die-holder 55X kicks out the treadle bar 34X and applies the brake 100.

It has been stated above that the (latch 15 inside die'holder 11 is released and the brake 100 applied when the last end of the wire pulls through the die, or if the wire should break in drawing. this being brought about by the upward swing of the dieholder 55X. The following also is a fact. In the event of any emergency while the block 11 is in rotationdrawing wire through the die, the operator may at any time kick out the treadle-bar 31X from shoulder- 40, which will immediately release the clutch 15 and apply brake 100 independently of any motions on the part of the die-holder 55X, with its connections for the automatic trip. This will be evident from the drawings.

Brake construction.

- The first form is shown in Figs. 5, 6, and 8. The brake shoe is a slide 93 having lateral extensions to provide ample bearing surface and conforming to the periphery of flange 101 of block 11 against which shoe 93 is pressed by helical spring 95 in holes 96 in shoe 93. A leather facing 100 is preferably interposed on the face of shoe 93. The brake is shown in Fig. 5 as applied to the rear side of block 11, this being a convenient location both for the brake itself and for the operating connections from treadle bar 34X.

In Figs. 5 and 8 the brake is shown in action applied to block 11 under compression of springs 95 which springs are permitted to act by the operating connections to treadle 34X that is, by movement of lever 87 to the left on its pivot 86 (Fig. 5).

The center of shoe 93 has a machined recess 126 (Fig. 8) to receive the upper end of lever 87, and to receive also the screw adjustmentfor the purposes of regulating the ressure of lever 87 and of taking up wear. ghoe 93 is contained within a bracket or housing 97 secured by screws 98 to table 1 of the machine. The housing is provided with a top cover 99, which is removed in Fig. 8 to show a plan of the parts inside. Housing 97 is open toward block 11, and also at its bottom so that shoe 93 slides directly on the finished surface of table 1 of the machine. The rear ends of springs 95 abut against the rear wall 125 of housing 97. The screw adjustment is as follows. Adjusting screw 92 extends out through housing rear wall 125 (Fig. 5) for ready access. Screw 92 has a shoulder which engages adjustment-block 94L which fits and is adjustable in finished shoe-recess 126 (Fig. 8).

' Adjusting block 94: is engaged by the top 88 of lever 87 in its movement to the right for the purpose of overcoming the compression of springs 95 and releasing the brake. The screw 92 extends loosely .through a recess 89 (Fig. (3) in lever-top 88, but its threads en'- gage in a lock-nut 128 and in shoe 93. There is a slight clearance opening as shown (Fig. 5) between lock-nut 128 and lever top 88, and it is the springs 95 and not lever top 88 which press shoe 93 to the left to its braking position. When lever-top 88 is moved to the left (Fig. 5) the compression springs 95 are freed to press shoe 93 and its facing 100 against block flange 101, and the springs always, via shoe 93 and screw 92, pull adjustment block 94. The only operating H10- tion required for the brake shoe 93 upon the finished surface of table 1 is a short travel to and from block-flange 101, and that is effected at the times and by the operating connections hereinbefore described.

In the modified construction of brake and its immediate operating connections shown in Figs. 11 and 12, the braking compression of springs 95 is countered and the brake thereby released by means of the wedge action of a plunger 87A rising vertically agains adjustment block 94A which acts against the shoulder of adjusting screw 92 as before. In this instance parts 87A and 94A are constructed to. permit the wedge action, as shown. Plunger 87 A is pivoted to one end of oscillating lever 85A mounted at 86A to a leg or support 2 of the machine (Fig. 5), the other end of the lever 85A being pivotally connected at 81A to the upper end of turn-buckle 83 of Fig. 5. lVhen plunger 87A is pulled down, compression springs 95 are free to force brake shoe 93 against block flange 101 as before, and the construction and operation in all other respects is thesame as in Figs. 5, 6, and 8.

I claim- 1. In a wire-drawing machine, the combination with the. rotatable drawing block, the die-holder, means whereby the die-holder moves away from its wire-drawing position when the tension of the wire is released, and the driving means for the drawing-block, of means for braking the rotation of the block, and operating connections between the dieholder on one hand, and the driving and braking means on the other, said connections being arranged to be operated by said movement of the die-holder to disconnect the driving means from the drawing block and to apply the braking means thereto.

2. In a wire-drawing machine, the combination with the rotatable drawing-block, the die-holder and means automatically operating to move the die-holder from its drawing position when the wire tension is released, of means for braking the rotation of the drawing-block, and operating connections between. the die-holder and the braking means, said connections being operated. by said movement of. the die-holder to operate the braking means.

3. In a wire-drawing machine, the combination with the die-holder, the rotatable drawing block and driving means therefor,

of means for braking the rotation of the drawing-block, an operators control, operating connections between said control and the driving means and braking means to dis-- connect the former and apply the latter and reversely; means for automatically moving the die-holder from its drawing position when the wire tension is released, and operating connections between the die-holder and operators control whereby said movement of the die-holder causes the operators control to operate the connections to the driving and braking means.

4. In a wire-drawing machine, the combination with the die-holder and the rotatable drawing block, of means for braking the rotation of the drawing block, an operators control, operating connections between said control and the braking means; means for automatically moving the die-holder from its drawing position when the wire-tension is released, and operating connections between the die-holder and the operators control whereby said movement of the dieholder causes the operators control to oper ate the connections to the braking means.

5. In a wire-drawing machine, the combination with the rotatable drawing-block and separable driving means therefor, of means for braking the rotation of the drawing-block, said means being applied to the block, an operators control, and operating connections between said control and the driving and braking means respectively, the

connections between the control and braking means being provided with a lost motion device whereby the operators control may be operated to release the brake without applying the power to the block.

In a wire-drawing machine, the combination with the rotatable drawing-block and driving means therefor, and the die-holder, of means for braking the rotation of the driving-block, operating connections to both the driving and braking means, a common operators control for said respective connections whereby the one may be operated and the operation of the other be discontinued at the will of the operator; and operating connections between said operators control and the die-holder whereby the operation of the driving means is stopped and the brake applied independent of the will of the operator. I

7 In a wire-drawing machine, the combination with the rotatable drawing-block, of a brake shoe conformed for braking engagement therewith, a compression spring arranged to force said shoe against said block, and operating connections to said shoe Whereby' it is alternatively forced against said spring away from said block and permitted to be forced by said spring against said block.

8. In a wire-drawing machine, the combination with the rotatable drawing-block, of a brake constructed and arranged to have its shoe applied to said block, a treadle lever extending below the drawing block and brake and pivoted to the machine below the drawing-block and brake, an adjustable connection having its lower end pivoted to the treadle-lever, and operating connections between said adjustable connection and the shoe of the brake.

9. In a wire-drawing machine, the combination with the rotatable drawing block, die-holder and means controlling the rotation of the drawing-block, of operating connections between the die holder and said controlling means, said means having a rigid member as a part thereof, and an adjustable weight upon said rigid member counterbalancing said die-holder and arranged in said operating connections to cause the movements of the die-holder away from its drawing position when the wire tension is released.

10. In a wire-drawing machine, the combination with the die-holder pivotally mounted to be movable vertically, of a vertically movable member having a loose connection with the die-holder, a horizontal operating connection pivoted to the lower end of said vertically movable member, and a weight mounted on said horizontal connec--' tion to counterbalance the die-holder.

WILLIAM D. PIERSON.

Witnesses:

F. S. VAN VALKENBURG, JAMES GAFFREY.

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