US2065083A - Stock feeding mechanism - Google Patents

Description

Dec. 22, 1936.

J. E. LOVELY STOCK FEEDING MECHANISM Filed May 7, 1934 5 Sheets-Sheet 1 w T \Q Jw 5 y Q W fi A j Q j Q A. 0

Dec. 22, 1936. J E LOVELY STOCK FEEDING MECHANISM Filed May 7, 1934 5 Sheets-Sheet 2 172 i- ZZZIMZ WW Dec. 22 1936. J. E. LOVELY 2,065,083

STOCK FEEDING MECHANI SM Dec. 22, 1936. J. E. LOVELY $TOCK FEEDING MECHANISM Filed May 7, 1934 5 Sheets-Sheet 4 Patented Dec. 22, 1936 2,065,083 STOCK FEEDING MECHANISM John E. Lovely, Springfield, Vt., minor to Jones & Lamson Machine Comp Sn insfield, ve,

'a corporation of Vermont Application May 77 1934, Serial No. 724357 30 Claims.

This invention relates to mechanism for feeding stock, as, for example, bar stock, in a lathe, to the tools for operating on it. Qne of the objects of this invention is to provide such a mech- 5 anism wherein the chuck for gripping the work may be opened and the stock fed therethrough and the chuck again closed by the actuation of a single operating member.

A further object is to provide a feed mechanism by which the amount of feed may be determined as desired.

Still another object is toprovide for the return of the stock feeding grip member to its initial position after a feeding motion.

A further object is to provide means whereby the work may be either fed or retracted as de sired.

Another object is to provide an improved work feed member adapted to stock of various cross sectional shapes.

Other objects and advantageous features will appear from a more complete description of an embodiment of this invention disclosed in the accompanying drawings in which Figure 1 is a side elevation of a turret lathe showing the stock feeding mechanism applied thereto.

Figure 2 is a detail cross section of a support for the stock, on line 2-2 of Figure 1.

30 Figure 3 is a fragmentary top plan partly broken away of the feed mechanism.

Figure 4 isa fragmentary view partly in elevation and partly broken away and in section of the same.

Figure '5 is a detail section on line 5-5 of Figure 3.

Figure 6 is a detail section on line 6-45 of Figure 5.

Figures 7 and 8 are fragmentary views similar to a portion of Figure 6, but showing parts in different positions.

Figured) is a detail section on line 9-9 of Figure 5.

Figures 10 and 11 are fragmentary views similar to a portion of Figure 3, but showing the actuating handle lever in chuck-open and stockfeeding positions, respectively.

Figure 12 is a view similar to Figure 9, but showing the parts in the positions of Figure 10.

Figure 13 is asection on line |3I3 of Figure 4.

Figure 14 is a detail section on line l4ll of Figure 13. Figures 15 and 16 are detail sections on lines l5l5 and Iii-l6, respectively, of Figure 14. 55 Figure 17 is a view similar to a portion of Figure 13, and showing stock of hexagonal cross section.

Referring first to Figure 1, at [is indicated somewhat diagrammatically a turret lathe although it should be understood that this inven- 5 tion is applicable to other types of machines. As shown this lathe is provided with a head-stock 2 through which 'extends a hollow work spindle '3 having a chuck 4 at its end for gripping the 1 stock to be operated upon. 10

' The mounting of the work spindle 3 in the headstock is shown more in detail in Figure 4. As therein shown the spindle is provided inwardly of the headstock 2 with a spindle nose 5 to which is secured the outer member 6 of the 15 chuck 4, which, as shown, is of the collet type. This member 6 is provided with a conical bore 1 for cooperation with the mating inclined faces of the collet jaws 8, the arrangement being such that on movement of the collet jaws to the right, 20 as seen in Figure 4, these jaws are wedged together into gripping relation with the work, workgripping shoes being shown at 9 which directly engage the work. The collet tube I0 is extended through the spindle 3, bears at its forward end 25 against the rear end of the collet, and at its rear end on a collar lOa provided with an outwardly turned flange II at its rear end which may be engaged by suitable spring pressed plungers l2 seated in a sleeve l3 carried on the rear end of 30 the spindle 3. The spindle 3 may be supported in suitable bearings such as [5 in the headstock and may be rotated by any suitable means not necessary to describe herein since it forms no part of the present invention.

In order to force the collet tube, as viewed in Figure 4, so as to grip the stock extending therethrough, a plurality of grip levers l6 may be employed. Each of these levers I 6, as shown in Figure 4, is fulcrumed on the sleeve 13 as at H and has an inwardly directed end portion l8 which bears against the outer face of the flange II. The other arm of each lever l6 may be provided with a cam roller l9 which may ride on the outer face of a cam sleeve 20. This cam sleeve is slidable axially on the work spindle 3 and is provided with a tapered outer face at 2|, which, when the sleeve is moved to the left, as viewed in Figure 4, rides inwardly of the cam rollers l9 and forces these cam rollers outwardly, this acting to move thelever portions l8 in a direction to press the collet tube ill in -work-gripping direction. The plungers l2 act to hold the levers IS with their cam rollers l9 in contact with the cam sleeve 20.

2. r Qyadeaose As shown best in Figure 3, this sleeve 28 may be housed within a casing 25 which may be secured as by bolts 22 to the end face of the headstock 2 andthis casing 25 may'also be employed to sup- 5 port the feed mechanism which will now be. de-

v(see Figure 5) with a pair of vertically spaced bearing portions-26 and 21. The upper of these bearings 26 is a split bearing having a separable 10 member 23 secured to the other member as by bolts 28 and this bearing has a sufiiciently large internal opening to receive the reduced diameter portion 29 ofa rock sleeve 38. This sleeve 38 is in turn journaled on a rock shaft 3| whichex- 15 tends down through and is journaled in the lower 3 bearing 21. The upper end ofthe rock shaft 3| is provided with a head 32 to which\is pivoted on a transverse pivot 33 a lever 34 having a handle portion 35 at itsouter end. This lever 34, as 20 shown, is provided with a'socket portion 36 which engages over the head 32 and encloses this head, the lower edges 31' and 38 of the socket acting as stops to limit the extent of pivotal motion of the handle. The portion 38 defines the lower lim- ,26 it of pivotal motion of this handle, this edge'then riding on the top of the sleeve 38, and defines the lower path of angular motion of the handle as it is swung horizontally to rock the rock shaft 3|. By lifting the handle 35 the portion 31 may be 88 brought down against the top of the sleeve 38 and the handle may be moved in the same horizontal relation to rock the shaft 3|, but in a difierent path. The reasons for this rocking motion will later appear. v 85 The sleeve 38,- as shown best in Figure 6, is provided with a pair of spaced arms 48, carrying adjacent to their ends and facing toward each other, pins 4| carrying anti-friction rbllers 42. These rollers ride within a groove 43 in the chuck- 40 actuating sleeve 28 previously described, so that as the'sleeve 38 is turned from the position shown in Figure 3 to that shown in Figure 10, the sleeve 1 28 is moved to the right out from between the chuck-actuating arms l6, permitting the chuck 45 to spring open. Conversely when the sleeve 38 is rocked in the opposite direction from the position shown in Figure 10 to that shown in Figure 3, the sleeve 28 is moved in between the arms I6, forcing the roller ends l9 apart and closing the 50 chuck.

Provision is made by which rocking of the handle 35 when in'its lower path of motion and- '55 orclosed, depending on the direction of such rocking. This is accomplished by the following mechanism. The lever 34 is shown as provided at a short distance from the rock shaft 3| with a hardened plug 58 which is shown as provided with a shank which may be inserted in a hole 52 in the lever 34 and there secured as by a set screw 53. Cooperating with this plug 58 is a similar hardened plug 55 having its shank portion 56 similarly secured in an arm 51 which may be in- 5 tegral with or secured to the upper end of the sleeve 38. The plug 58 may bear against the plug 55 when the handle is being moved from its position of Figure to its position of Figure 3, thusthe lever 34 and the arm 51 may move in both" angular directions as the handlev 35- is swung horizontally. The dog 68 is also provided with a foot 63 which may ride along the upper face of a block 64 secured to the bearing 26. This block 5 scribed. This member 25, as shown, is provided j 64 is of such length that, as the lever 34 is turned in a direction to rock the rock shaft 3| and to turn the sleeves 38 with it, when this sleeve 38 has been turned sufiiciently to fully open the chuck, the foot 63 rides off the inclined 10 end 65 of the block 64, whereupon its weight causes it to swing into the position shown in Fig- .ure 7 thus to fall away from engagement with the plug 58, whereupon the plug 58 can move away from theplug 55 so that the arm 51 is no longer secured for rocking with the lever 24 inone direction. Thus when the lever is swung from the position shown in Figure 3- to that shown in Figure 10, the chuck is fully opened, but the lever, which is now uncoupled from the sleeve 38, may swing forwardly to a further angular extent but without effect on the chuck mechanism. This further angular motion of the lever 34, rocking the rock shaft 3|, is employed to produce the feed of the stock as will now be described.

Referring again to Figure 1, at 18 is shown a stand spaced from the headstock end of the machine and which may have at its top suitable meansas at.1| for supporting stock to be fed to the headstock of the lathe. As shown in Figure 2, this portion 1| may be formed as a head 12 having spaced sockets 13 at its lower end in which may be received the upper ends of supporting rods 14, which, at their lower ends may be supported in a suitable base 15. At its upper end the head 12 may be provided with work-supporting rolls 16,

- into which the bearing rollers 16 project. The

head 12 is also shown as receiving a pair of bars 86 which may be secured therein as by set screws 81 and these bars extend over to the housing member 25 where they may be secured by any suitable means, being shown as seated in sockets in an extension 82 thereon. The head 12 is also, provided with a guide opening 84 to slidably receive a rack bar 85 shown as keyed against rotation therein. This rack bar also extends in axial sliding relation into the frame portion 82 and is arranged for motion parallel to the lengths of the guide bars. The bars 86 form guiding members for the slidable reception of stock-gripping or engaging mechanism 98 which has a frame portion 9| (see Figure 13) provided with tubular .bearing portions 92 through which the bars 86 slidably pass.

A preferred form of stock-engaging means is shown in detail in Figures l3 and 1'1. Referring to these figures, at I88 is shown a sleeve through which the stock passes, this sleeve being journaled on ball bearings |8| within a casing I82 secured as by screws I83 to the frame portion 9|. The sleeve )8 is shown as provided with an end portion |85'of enlarged diameter having in its outer face an annular recess |86 within which is journaled a ring |81. This ring is provided with 7 beveled gear teeth I88 on its rear face which mesh with corresponding teeth of a pinion I89 on a shaft 8. This shaft 8 extends radially through the outer wall I of the portion |85 and has a suitable polygonal socket portion "-2 at its with their faces outer end for the reception of a tool by which it may be rotated, thus to rotate the ring I06. This ring I06 on its outer face is provided with spiral ribs I09 which form a scroll for closing ,and opening the work-engaging jaws I I5 and I I6 as the ring is turned. The jaws II5 are shown as diametrically opposite to each other and each comprises a block I I1 having rack teeth I I8 on its back face engaging the ribs of the scroll and having adjustably secured thereto, as by the screws H9 and I20, an angular shaped member I2I which is provided with a work-engaging face I22 at its inner end. Each of the jaws H6 is provided with a spring pressed plug I25 having a head I26 riding in an enlarged socket I21 which houses a spring I28 backed up by a threaded plug I29 which closes the outer end of the socket. Thus two of the four jaws shown are yielding, while the others are rigid but adjustable. This permits the mechanism to be set to properly engage work of various cross sectional shapes satisfactorily. For example, in Figure 17, stock I30 of hexagonal cross section is shown, the fixed jaws engaging I 22 on opposite edges of the stock while the yielding jaws with their plugs I25 engage flat faces of the stock. The jaws should be so adjusted that the stock is gripped sufficiently tightly so that when the collet chuck is open, motion of this gripping means will cause stock to pass through the chuck, while when the chuck is closed on the work, this gripping means may be moved axially of the stock without undue friction thereon. Similarly stock of other cross sectional contours such, for example, as round, square, and many others, may be properly engaged by the jaws, the fixed jaws being adjusted to engage diametrically opposite parts of the stock and the yielding jaws adjusting themselves automatically to the portions of the stock presented thereto-,

ward.

As shown in Figure 16 each of the jaws may be held in position by forming its main block portion with fins I35 which ride in suitable radial grooves I31 within the portion I05.

Means are provided by which rocking of the handle 35, which results in rocking the rock shaft 3|, is effective to move the work-engaging means 00 to feed the work under controlled conditions as will later appear. The rack bar 85 hereinbefore mentioned is slidably guided through the frame member 9| parallel to the direction of motion of the work-engaging means 90, as shown best in Figures 13 and 15, extending through a sleeve portion I40 thereof. Pivoted 5n the screw I4I secured to this frame portion 9| is a double ended dog I42 having the ratchet tooth extremities I43 and I 44, either of which-may be brought into operative relation to the teeth of the rack bar 85. In order to determine which one of these ratchet teeth will be in operation, a rocking abutment member I44 has been provided. This abutment member is pivoted as on the screw I45 and has engaged around this pivot screw a torsion spring I46, portions near the ends thereof normally engaging on the corners I41 and I48 of the dog I42. The abutment member I 44 is provided with stop portions I48 and I50, which limit the uncoiling motion of opposite end portions of the spring I46. This member I44 is also shown as provided with spaced abutments I 5| and I 52. The

abutment I5I is engaged by a plug I 53 spring pressed outwardly thereagainst by the spring I54 seated against a threaded plug I55 which closes the outer end of a bore I56 in which the plug the outer end of this I I53 is slidably mounted. The abutment I52 may be engaged by a rod I58 slidably mounted in sub stantially parallel relation to the plug I 53 and rod I58 is engaged by the lower end of an arm I60 (see Figure 13) keyed to a rock shaft I6I. This rock shaft is slidably journaled in a portion I62 of the stock-engaging means 90 and is shown'as journaled at its outer end, as at I64, in an ear I65 of the work support H. The other end portion of the rock shaft I6I is journaled in the bearing portion 21 which also carries the rock shaft 3|. Keyed to this rock shaft I'6I at the bearing 21 is a lever I10, the upper end of which at I1I may bear against an abutment screw I12 adjustably secured in the rock sleeve 30, the arrangement being such that when the rock sleeve 30 is in the angular position wherein the chuck 4 is closed, the abutment screw I12 is in contact with the portion 'I1I, as shown in Figures 6 and 9. This holds the rock shaft I6I in such angular position that the arm I60 has pressed the rod 'I58 into the position shown in Figures 13 and 15 so that the member I42 is rocked to bring the ratchet extremity I44 into operative engagement with the rack bar 85. Motion of the rack bar 85 to the left, as

shown in Figure 15, will then be effective to carry the stock-engaging means 90 to the left with it, while motion of the rack bar 85 to the right will permit motion of the rack bar Without moving the stock-engaging means 90. Thus in this position of the parts reciprocatory motion of the rack bar 85 will be efiective to cause movement of the stock-engaging means 90 away from theheadstock and toward the work support 10.

Motion of the rack bar 85 is produced by rocking of the handle 35 as will now be explained. 0n the lower end of the rock shaft 3I is pinned an arm I to the outer end of which is pivotally connected one end of a link I8l. The opposite end of the link IBI is provided with a slot I 82 through which passes a headed pivot pin I820 which is secured to the rack bar 85. Thus as the handle 35 is turned from the position shown in Figure 10 toward the position shown in Figure 11, the rack bar 85 is moved to the right.

The slot I82 in the link I8I prevents the initial rocking motion of the handle 35 throughout the range of arc indicated in Figure 10 by the arrow a, from being effective to move the rack bar 85,

this initial motion through the are a, as previously described, acting however to open the chuck 4 when the handle is in its lowered position with the abutment 38 of the lever 34 in contact with the top of the rock sleeve 38. This initial angular motion of the handle 35 which opens the chuck, however, is sufli'cient in amplitude to swing the stop screw I12 of the sleeve 30 out of contact with the end I1I of the lever I10, this end of which is immediately rocked inwardly by the action of the spring pressed plug I85, as shown best, for example, in Figure 12. This rocking of the shaft I6I withdraws the arm I60 from the outer end of the rod I 58, whereupon the spring I54 is effective to press the plug I53 against the lug I SI of the member I42 thus to remove the ratchet point I44 from operative relation to the rack bar 85 and to move the point I43 into active relation. In this position of the parts, which is shown in dotted lines in right of the rack bar 85 by swinging the handle 35 through the arc b shown in this figure, is effective to move the work-engaging means toward the headstock of the machine, and since the chuck 4 has already been opened in the initial-angular motion forwardly through the chuck. As the handle 35 is returned toward its initial position of Figure 3, after the lost motion between the pivot is: and the link m is taken up, the rack bar 85 is moved to the left, but in this position of the dog I42, it is ineffective to move the stock-engaging means 90. Thus by a back and forth motion of the handle 35 when in its lower path, the stock is fed intermittently through the chuck to any desired extent and when this feeding has progressed to the desired point, the handle is returned to the angular position of Figure 3, whereupon the chuck 4 closes against the stock in its new axial position. This back and forth feeding motion of the handle- 35 moves the stock-engaging means 90 by successive steps toward the headstock of the machine andaway from the work support I0. Provision is therefore made by which it may be returned toward the stock support prior to a further feeding motion. This may be effected by raising the handle 35 into its upper path of rocking motion and then oscillating it back and forth in thisupper path. Raising of the handle in this manner lifts the plug 55, as shown in Figure 8, above the upper end of the dog 60, so that it can move over the top of its lug 62 so that rocking of the handle back andforth in this up- 30 and is thus ineffective to open the chuck 4. In this stationary angular position of the rock sleeve 30, however, the abutment I12 remains in the position shown in Figure 6, holding the lever I10 in such angular relation that the rock shaft 16! holds the ratchet point I44 in operative position with relation to the rack bar 85. As the handle is swung forwardly toward the position of Figure 11, therefore, the rack bar is moved to the right without moving the stock-engaging means 90, but on the reverse direction of motion of the handle 35 it moves the rack bar 85 to the therewith. At this time, however, the chuck 4 is closed so that the stock-engaging means 90 slides back on the stock without producing any feed motion thereof.

The stock stop, as shown at I90 in Figure '1 carried by the turret l9l, is commonly employed to limit the forward feed of the stock, and the position of this stop is commonly controlled by the mechanism which determinesthe position of the turret relative to the headstock 2. By moving the turret saddle toward the headstock while the chuck 4 is open the stock may be pushed rearwardly.

If desired, however, the stock may be retracted relative to the chuck by suitable actuation of the handle 35, and when this is desired, the handle-35 is swung toward the positions of Figures 10 and 11 while in its lower path, so that the chuck is opened at the first part of this motion, thereupon the lever H0 is held in the position shown in Figure 6 by hand,. a handle I90 being provided for that purpose. When so held the dog I42 is retained in the position shown in-Figure 15, so that as the'rack bar 85 is moved to the left by continued motion of the handle 35 toward the position shown in Figure 11, the stock-engaging means 90 is moved away from the headstock. As, however, the chuck 4 has been opened, this motion is efiective to retract the stock relative to the head-stock.

From the foregoing description of an embodiof the handle 35, it is effective to feed the stock per position is ineffective to rock the rock sleeve left and the stock-engaging means 90 is moved those skilled in the art that various changes and modifications might be made without departing from the spirit or scope ofthis invention as defined by the appended claims.

I claim:

1. In combination, a chuck for receiving a length of work, stock-gripping means back of said chuck, and means including connections to said gripping means and chuck and a single operating member actuable .in one manner to move said gripping means toward said chuck while said chuck is open to feed the stock and in another position to retract said gripping'means relative to the stock to change the position of its engagement with said stock.

2. In combination, a chuck for receiving a length of work, stock-gripping means back of said chuck by movement of which toward said chuck the stock is fed thereto, and means including connections to said gripping means and chuck and a single operating member actuable to retract said gripping means along the stock to change the position of its engagement with said stock. v

3. In combination, a chuck for receiving a length of work, stock-gripping means back of said chuck by movement of which toward said chuck the stock is fed thereto, and a hand lever and connections to said gripping means and.

chuck from said hand lever to cause actuation of said hand lever to retract said gripping means along the stock to change the position of its toward said chuck while said chuck is closed.

5. In combination, a chuck for receiving a length of stock, stock-gripping means back of said chuck, and manually actuable means including asingle actuating member and connections to said gripping means and chuck, operable selectively to move said gripping means toward or away from said chuck while said chuck is closed. I

6. In combination, a chuck for receiving a length of stock, stock-gripping means at one side of said chuck, a movable member, uncoupling connections between said member and chuck operative throughout one part only of the movement of said member for opening andv closing said chuck, and connections between said'membet and means operative in another part of such movement while said chuck is uncoupled therefrom for moving said means toward or from said chuck.

7. In combination, stock-gripping means, a movable actuating member for said means, and ratchet means selectively coupling said member and gripping means for simultaneous movement during movement of said member in one or the other directionwith freedom of movement of said member in the opposite direction without moving said gripping means.

8. In combination, stock-engaging means, a member, means supporting said member for moone of said paths to move said means in one direction and to cause the opposite direction.

9. In combination, stock-engaging means, a chuck, a member selectively move said means but inoperative to aifect said move said means toward said chuck when said member is moved member in the other said chuck remains closed when said member is moved in the other of said paths.

11. In combination, a chuck forreceiving a length of stock, stock-engaging means, a member, means supporting said member for motion in either selected of a pair of paths, connections between said member, chuck and engaging means operative to open said chuck and then to move said means toward said chuck when said member is moved in one of said paths, and to move said member in the other direction while said chuck remains closed when said member is moved in the other of said paths, and means selectively operative to cause movement of said member in said one path to move said means away from said chuck.

12. In combination, a chuck for receiving a length of stock, stock-engaging means, a handle rockably mounted, connections from said handle.

actuable to open said chuck on rocking of said handle through an arc from one angular position and to close said chuck on reverse rocking of said member to said position, a movable member, connections from said handle to said member causing oscillation of said handle through another are to move said member back and forth, and one way driving means between said member and engaging means causing motion of said member in one direction only to move said stock-engaging means.

13. In combination, a chuck for receiving a length of stock, stock-gripping means, a handle rockably mounted, connections from said handle actuable to open said chuck on rocking of said handle through an arc from one angular position, a, movable member, connections from said handle to said member causing oscillation of said handle through another are to move said member back and forth, means causing motion of said member in one direction only to move said stockgripping means, and means for selecting the operative direction of motion of said member.

14. In combination, a chuck for receiving a length of stock, stock-engaging means, a rock shaft, a lever pivoted to said shaft to swing in a plane lengthwise thereof and rockable transverse to said plane to rock said shaft, an arm journaled on said shaft, connections between said arm and chuck for opening and closing said chuck on rocking of said arm, means for retaining said lever and arm in operative connection when said lever is in one angular position about its pivot and throughout only an arc of rocking of said,

r ckable means to arm suflicient to open and close said chuck, a.

tional configurations.

17. In combination, a length of stock, a stoc chuck, means for closing chuck for holding a k ripper back of said and opening said chuck,

and then to retract said gripping means or to be inoperative to open said chuck.

20. In combination, a chuck for handle pivot to move said gripper toward or' from said chuck, rockable means for opening and closing said chuck, and selectively. cooperating parts on said handle and manually operable means for mov-.

cause swinging of said handle gchuckga pivotally mounted handle, connections including lost motion between said handle and gripper to cause swinging of said handle about its pivot after said lost motion is taken up to move said gripper toward or from said chuck, rockable means for opening and closing said chuck, and selectively cooperating parts on said handle and rockable means to cause said swinging of said handle in one direction during the taking up of said lost motion to rock said rockable means.

22. In combination, a chuck for receiving a length of stock, a stock gripper back of said chuck, a handle pivoted for motion in planes transverse to each other, connections from said handle to said gripper to cause swinging of said handle in one of said planes to move said gripper toward or from said chuck, rockable means for opening and closing said chuck, and parts on said handle and rockable means cooperating when said handle is, in one angular position in 'the other of said planes and out of cooperative position in another angular position, whereby rocking of said handle to move said gripper may be operative or'inoperative at will to move said rockable means.

23. In combination, a chuck for receiving a length of stock, a stock gripper back of said chuck a rockable member, a handle pivoted coaxially with said rockable mem 'r and mounted to swing transversely of said pivot toward or from said rockable member and into or out of operative engagement therewith for simultaneous rocking motion, operative connections between said rockable member and chuck for causing rocking of said member to open or close said chuck, and connections from said handle to said gripper to cause rocking of said handle about its pivot to move said gripper toward or from said chuck.

24. In combination, a chuck for receiving a length of stock, a stock gripper back of said chuck, a rockable member, a handle pivoted coaxially with said rockable member and mounted to swing transversely of said pivoted member and into or out of operative engagement therewith for simultaneous rocking motions, operative connections between said rockable member and chuck for causing rocking of said member to open or close said chuck, connections from said handle to said gripper to cause rocking of said handle about its pivot to move said gripper toward or from said' chuck, said last-mentioned connections including lost motion during which said rockable member is rocked when said handle is in operative relation thereto, and means for operatively disconnecting said handle and rockable member when said handle has turned said means to a predetermined angular extent in one direction.

25. In combination, a chuck for receiving a length of stock, a stock gripper back of said chuck, a member rockable on a substantially vertical axis, operative connections from said member to open or close said chuck on rocking of said member, a handle pivoted coaxially with said rockable member thereabove, said member having spaced elements on its upper end between which a part of said handle may engage, said handle being rockable upwardly out of cooperative relation with one of said elements to opera'-' connections between after a predetermined extent of said handle in member in one or tively disconnect said handle from said member, said handle and gripper to cause horizontal swinging of said handle beyond a preliminary lost motion to move said gripper toward and from said chuck, and means acting 5,

of rocking of said member to cause one of said elements to release said handle for further swinging independently of said rockable member.

26. In combination, a chuck for receiving a 10 length of stock, a stock gripper back of said chuck, a member rockable on a substantially verout from between said elements to operatively handle and rockable member,

handle in its lower position in one direction acting to open said chuck during 21 the taking up of said lost motion, and means for releasing said element to permit further motion the same direction after said chuck has been opened to move said gripper.

2'7. In combination, a chuck for receiving a length of stock, a stock gripper back of said chuck, a member movable substantially parallel to the length of said stock, ratchet connections between said member and gripper to cause motion of said member in either selected direction to move said gripper in' the corresponding direction, a member rockable on a substantially vertical axis, connections from said member to open or close said chuck on rocking of said rockable member in one or the other direction, a handle rockable coaxially with said rockable member, and operative connections from said handle to said movable member to cause rocking of said handle to move said movable member, said handle and rockable member having parts selectively cooperating to cause swinging of said handle in one direction to first rock said rockable member to open said chuck or to leave said chuck closed and thereafter to move said movable member toward and from said chuck, operative connections from said rockable member to said ratchet connections to cause said rocking to couple said gripperfor movement with said movable member toward said chuck to thereby feed stock thereto, and to cause swinging of said handle when operatively disconnected from said rockable member to cause said ratchet connection to connect said movable member and gripper for motion of said gripper away from said chuck.

28. In combination, a chuck for receiving a length of stock, a stock gripper back of said chuck, a member movable substantially parallel to the length of said stock, ratchet connections between said member and gripper to cause motion of said member in either selected direction to move said gripper in the correspondingdirection, a member rockable on a substantially vertical axis, connections from said member to open or close said chuck on rocking of said rockable the other direction, a handle rockable coaxiallywith said rockable member, operative connections from said handle to said disconnect said swinging of said .movable member to cause rocking of said handle to move said movable member, said handle and rockable member having parts selectively coopwith said member, said element being biased to eratingto cause swinging of said handle in one retract as it rides at! said member to thereby op-' 1 l chuck to thereby feed stock thereto, and to cause length of work, a. rockable member, connections 10 from said chuck, and means for adjusting said therefrom between which a portion of said lever 15 has been opened. disconnect said lever from said member, a stock 20 lever fulcrumed coaxially with said member, said member, and means for selecting the direction of 25 of said elements during a portion of its motion, JOHN E. LOVELY.

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