Патент USA US2412354код для вставки
Dec. 10, 1946. 2,412,354 7 an PARKER LOOK SHEDDING MEANS 5 Sheets-Sheet 1 Filed May 1, 1945 Q 14d= r00'2.ON Q0 3. 30m. _. ¢ .3 ‘ ,..3 u . 1...»: ,r \. 1.I_q a _..5 5 an_ 8onan.we :3. .x wa.\.a. .\ .-¢u-.,_U.u.\ \l .‘~n Jaw _“ ‘.n1 2.. on 3 .5 _a mu / /en \, v» 5. x - °' a\ 1 Yz. \ a. pm 1 .‘ v2 3// .5\ - S.“. "am £24m" n; ‘m . 0v 0 A m? a. m 3% x a s\ Dec. 10, 1946. S. P. PARKER _ 2,412,354 LOOll SHEDDING HEARS Filed llay l, 1945’ - 5 Sheets-Sheep 2 FIQ6 ‘ 54mm. E PARKuv. w ATTQRNEXS. Dec. 10, 1946. s. P. PARKER ’ ‘ 2,412,354 LOOM SHEDDING MEANS Filed may 1, 1945 ’ “ - 5 Sheets-Sheet s SAMUEL F.’ -' 8v ‘anew. My ATTORNEYS . . _ Dec. 10, 1946.‘ s R PAR-KER‘ _ ' 2,412,354 LOOM SHEDDING MEANS Filed Ilay 1, 1945 I 5 Sheets-Sheet 4 - luvem-on. SAMucL I? F’A ’ an. ATTO RNILYS. D80 10, 1946- 2,412,354 s/P. PARKER 1400M SHEDDING MEANS 5 Sheets-Sheet 5 Filed May 1 , 1945 w. T “Pr/m. 9/5mMMu;RA mNP. A R“ a‘wK,m. Patented Dec. 1.0, ‘1.946 ‘2,412,354 ' ‘UNITED STATES PATENT OFFICE LOOM snsnnmo MEANS Samuel 1?. Parker, 'La_Grange,vGa., assignor to Callaway Mills, La Grange, Ga., a corporation of Georgia Application May 1, 1945, Serial No. 591,266 . 18 Claims.v '_(Cl. 139-55) 1 This invention relates to looms in which warp yarns are manipulated by discs or cards to form sheds in which ?lling yarn isinserted to produce broken away, of lower portions of the newi'drive; , Fig. 3 is a view'similar to Fig. 2, showing upper ' portions of the new drive; _ v Fig. 4 is a sectional view, the lower part- being a fabric. More particularly, the invention is con taken: on the line 4-4 of Fig. 2, and the upper cerned with a novel mechanism by which the part on the line 40-41: of Fig.3; discs of such a loom may be rotated in one direc . Fig. 5 is a vertical sectional view, the lower tion or the other under the control of a pattern part being taken on the line 5-5 of Fig. 2, and , element. In a loom in which the new disc drive the upper part on the line 50-50 of Fig. .3; is employed, it is not necessary .to provide means Fig. '6 is a vertical sectional view on the line for twisting together the strands of warp yarn 10 6--3 of Fig. 2; which are' to be handled by a single disc and Fig. 'l is a sectional view on the line ‘1-1 of, the warp yarns may, accordingly, be supplied to ' the discs from a beam or any ' other suitable source. ' . In disc looms in which the discs continuously rotate in one direction, the strands of warp yarn handled by a single disc are twisted together by the rotation of the disc, and the twist runs in both directions from the disc. If measures were Fig. 3; a Fig. 3 is a view in end elevation of a ratchet wheel used in the new drive‘; ' ' Fig.9 is a view in end elevation of a modi?ed ’ ‘drive; Fig. 10 is a plan view of the construction shown in Fig. 9; and I _ Fig. 11 is a,view in rear elevation of the con not taken to prevent, the twist running back from 20 struction shown in Fig. 9. ' each disc to the supplies of warp yarns would The loom illustrated in Fig. 1 comprises the soon'make it impossible to draw the yarns fromv the supplies. It has, accordingly, been proposed usual sides 20, between which extends a crank to reverse the direction of rotation of the discs periodically so that the discs rotate one or more shaft 2| operating a lay 22 provided with a reed ' steps in onedirection ‘and then rotate stepwise usual way by conventional means, such as picker - 'in the reverse direction, the" reverse rotation of " the discs taking out the twist imparted to the groups of warp yarns handled by individual discs, between the discs‘ and the warp yarn supplies, 30 The mechanism heretofore proposed for the pur pose of driving the discs with a reversing action, is impractical,.in that the discs are not under. positive control at all timesv and part of their movement results from momentum. The new mechanism overcomes the objections to the disc drive previously proposed and it in cludes positive means' for rotating the discs in one direction or the other. The disc rotating means may include a shaft operatively connected to the discs, and pawl and ratchet means for moving the shaft stepwise in one direction or the other under the control of means which are 23. A shuttle 24 is movable across the lay in the sticks, etc., operated from cam shaft 25. The warp yarns 28 are drawnfrom any suitable source of supply, such as beam 21, the arbor 2B of which is-provided with a brake drum 28a acted on by a brake band 29.- From the beam, the yarns travel through‘ a device, generally designated 30, for maintaining the yarns under tension, the device preferably being that disclosed andlclaimed in my co-pending application Serial No. 591,265, filed May 1, 1945. From the tension control de vice, the yarns pass around lease rods indicated at 3|, and thence to discs 32. In the construc-. tion shown, each disc has four openings for the passage of individual yarns, and the discs are formed with peripheral teeth (not shown) vmesh ing with long pinions on upper and lower shafts 33, 34, respectively, which are supported in up ward extensions 35 on the loom sides. The discs in turn controlled by a pattern element; Means, preferably taking the form of a shaft carrying 45 may be held in spaced relation by any suitable means, such as those shown in my co-pending cams, are provided for operating the pawl and ' ratchet means and for advancing the patern ele application Serial No. 591,267, ?led May 1, 1945. In the operation of the loom, the discs are rotated stepwise through a quarter turn at each drive shaft is provided with a brake which is actuated by the cam shaft at the appropriate 60 step, and sheds are thereby formed, through which shuttle 24 is passed to produce a fabric. times to hold the disc drive shaft against. acci' v The fabric is taken‘ up on a take-up roll 36 after dental rotation. . having passed around other rolls, such as that - For a better understanding of the invention, indicated at 31. , reference may be made to the accompanying The new drive forwthe discs comprises a shaft drawings, in which ' 38 mounted in suitable bearings in the loom sides Fig. 1 is a view in side elevation of a disc loom and provided with a sprocket wheel 39, about equipped-with the new disc drive, parts of the which is traineda chain 40 similarly trained about loom being broken away to show the features of a sprocket wheel on shaft 34. Shafts 33 and 34 the drive; are connected by a chain- 4i trained about Fig. 2 is a view in rear elevation, with parts ment, ‘and in the preferred construction, the-disc 2,413,354 . ‘ I 3 ' 4‘ I sprocket wheels thereon, so that the shafts wi rotate in unison“. Shaft 38 is provided with a pair of ratchet wheels 42, 43 fast thereon and ‘oppositely disposed, that is, having their 'teeth extending in opposite ‘directions. A yoke 44 straddles shaft 38 and is pivotally supported at 45 on an arm 46 pivoted at 41 on an upright frame ' cam 18 on shaft 26, the cam ‘engaging a'rolle'r 88 mounted on a stud on arm 46. , . ' . In order to prevent overrunning of shaft 38, it is provided with-a brake'drum 8| having a pe ripheral channel in‘ which is seated a brake band consisting of a strap>82 carrying a length of brake lining 83 on its inner face. The strap member 48 attached to a part of the loom frame; is connected at one end to a pin'84 on an arm work. The yoke is provided with pawls for oper 65, pivotally mounted at 86 on a bracket 8'l_ ating the ratchet wheels and, in the construction 10 secured to the loom frame. The other end of the shown, the‘pawlstake the form of pins 49, 56 strap is connected to a bolt 88, which passes. engageable with the teeth -of ratchet wheels through openings in arm ,85 andfcarries'a wing 42, 43, respectively, depending on the position nut 89, beneath which is a spring 98 encircling of yoke 44. A spring 5| connected to the tail _ the bolt and bearing at one end against the wing of the yoke and to frame member 48 tendsvto 15 nut and at the other end against arm 85. Arm.85 is raised and lowered during the operation of swing the yoke counterclockwise on its pivot 45 to bring pin 49 into operative relation to the teeth the loom by a double acting cam 9| on shaft 25. When a low part of the cam is in contact with of ratchet 42. The yoke is movable to the oppo - arm 85, the strap 82 bears lightly against the site position, as' shown in Fig. 4, by means con trolled by a pattern device. 20 drum' 8|, so that shaft 38 can be moved against the action of the brake. When a high point on The pattern device includes a pattern element 52 in the form of a chain carrying riders 53 cam 91 bears against the arm and swings it upwardly, strap‘82 bears so tightly against drum mountedin a selected arrangement on the links thereof, and the chain runs over a sprocket - 8| as toprevent rotation of shaft 38. 'wheel 54 on a shaft 55 supported in bearings in 25 In the operation of the apparatus so far de arms 56 attached to the arch 51- of the loom. scribed, the rotation of cam shaftv25 causes yoke 44 to be raised and lowered twice per revolution ' A ratchet wheel 58 fast on shaft 55, is actuated . by pawl 59 carried by an arm 60 loosely mounted of the shaft. In each upward movement of the yoke, one or the other of pins 48, 50 engages on shaft 55 and connected by a rod 6| to an arm 62'pivoted at 63 on a ‘bracket 64 attached 30 its respective ratchet wheel 42, 43 and rotates to the loom frame. Arm 62 is swung up and down the wheel and shaft 38 by one tooth.’ During‘ by a cam 65 on the loom cam shaft 25, and such, movements of shaft 38, arm 85 is in the each time the arm is raised, pawl 59 engages down position so that the brake band 82 bears lightly against‘ drum .8l and permits the. shaft ratchet wheel 58 by one tooth and advances - shaft 55 by' one step. Shaft 55 carries a disc 66 to be rotated. vIn the end of each step in the _ fast thereon, the disc having peripheral depres movement of shaft 38,‘arm 85 is raised to apply‘ ‘ the brake and prevent anyoverrunning of shaft sions 65a which may be entered-by a disc 61 carried by an arm 68v pivotally mounted on a rod 38. Once\ per revolution of shaft 25, ‘arm 62 is operated to advance ratchet wheel 58 by one' 56a- extending between arms-56. The free end of arm 68 is connected by a spring 69. to, one end 40 tooth. This causes shaft 55 and sprocket wheel of a rod 10 mounted for swinging movement on 54 to be rotated a step and pattern chain, 52 to be .advanced a step. shaft 55 and having a rearward extension over Arm ‘H overhangs pattern chain 52, and when lying rod 56a. ,With this arrangement, arm 10 acts as a stop for one end of spring 68', and, as ever a rider 53 on the chain engages arm ‘II, the shaft 55 is advanced a step by rotation of ratchet arm is maintained in the raised position shown wheel 58, disc 61 is forced upwardly out of a in Fig. 4 and operates through the connections depressionin the periphery of disc‘ 66 against the described to keep the lower end of yoke 44 to the‘ action of spring 69. Disc 61 then entershthe left, as shown in Fig. 4. With the yoke in this next depression in disc '66 and this serves to hold position, the raising of arm 46 by cam 19 causes . pin50 to engage a tooth of its ratchet wheel and _ shaft 55 against further movement until ratchet i wheel 58 is advanced another step. , _ advance the wheel by one tooth for each rais- , The pattern element 52 controls the position ing of arm 46. This causes'shaft 38 to be ad- ' of yoke 44 by means of an arm 1| pivotally mounted on rod 56a. Arm 1| overlies the pat vanc-ed counterclockwise by one step, and 'the tern element and is engageable by the riders 53 thereon, whenever a rider lies at the top of sprocket wheel54 (Fig. 4). The free end 12 of arm ‘H is offset from the remainder-of the arm ‘and is connected by- a rod ‘[3 to a crank arm 14 one step. Rotation of shaft 34 causes shaft 33 to rotate, and the pinions on the shaft cause discs 32 to move-one step in a clockwise direction, asv fast on a shaft 15 mounted in a bracket on one shaft acts through chain 48 to rotate shaft 34 ‘ viewed inFig. 1. Whenever a portion of chain 52, not provided with a rider, comes beneath arm . ‘H, the arm swings down, and this permits spring of the loom sides, and shaft ‘[515 provided with 5! tov act on the- tail of yoke 44 and swing the another arm 16 connected by a link-‘I1 and a'stiif yoke, 50 that pin 49 moves into operative relation spring 18 to one leg of yoke 44. With this ar with its ratchet wheel 42. On the next upward rangement, when a rider 53 on chain 52 lies movement of arm 46, ratchet wheel 42 is ad beneath arm 1 |,.the arm is raised, and this causes 65‘ vanced one step, and this causes shaft 38 to'inove shaft 15 to be swung clockwise. _ Arm ‘[6 then ' . clockwise by one step anddiscs 32 are moved acts throughv link 11 and- spring '18 to pull the ' ' lower end of yoke 44 to the left, as shown in Fig. 4. counterclockwise.‘ The ,brake acting on shaft 38 and consisting In this position of the yoke, pin‘ 56 lies in operas ' of brake drum 8|, strap .82, and arm 85, is, re tive relation to the teeth of ‘its ratchet wheel 43, 70 leased just prior to each upward movement of and upon raising of the yoke by arm 46, the arm 46 and yoke‘ 44. At the end of each step i , pin acts on the ratchet wheel to rotate the wheel in the movement of shaft 38,‘ the brake is again and shaft 38 by one tooth on the wheel. Arm 46 is regularly raised and lowered during the opera andheld against accidental rotation, until the tion of the loom by ‘means of a double acting‘ next action of arm 46 and yoke 44. applied thereto, so that the shaft is‘ arrested amasse ‘ -: 5 in the modi?ed construction shown in Figs. 9, 10, ‘and 11, the crankshaft 2!‘ of the loom to ‘the discs for rotating them stepwise in either direction, said means including a shaft' a ml!‘ of oppositely disposed ratchet wheels on the shaft, carries a- gear 92 meshing with gear 93.011 a shaft 96. Shaft 94 is provided with a disc Sta carry ing an eccentric pin to which is connected rod . and a reciprocating member carrying a pair of ‘ Pawls engagealole selectively with respective ratch_ et wheels, means for continuously reciprocating to, which reciprocates a rod 95 mounted in a - guide 97. Rod 95 is attached at vone end to a said member, control means for controlling the action of the rotating means, and a pattern de yoke as, in which are pivotally mounted pawls $9, each of whichis provided with a pin loll lying vice for controlling the control means. within a slot- WI in a bar I02. The bar is con _ ' )2. In a loom, the combination of a plurality of nected by a cord M3 to the harness lever “it of a dobby head, the position of the lever being controlled by a chain Hi5 trained about a sprock warp‘shedding discs,‘ a shaft operatively con nected to the discs for rotating them, oppositely lie‘ provided with a sprocket wheel Hi, about 'lected pawl effective and the other ineffective, and a pattern device for controlling the control _ disposed ratchet wheels on the shaft, a pair of et wheel. ass on a shaft It? and carrying riders pawls engageable selectively with respective 888 in a selectedv arrangement. Pawls 9d operate 15 ratchet wheels, means forreciprocating the pawls on respective ratchet wheels I119, I091: on a shaft in unison, control means acting to render a se= which is trained a chain “2. The chain passes about a sprocket wheel M3 on a shaft 341’, which corresponds to shaft 3d in the Fig. l construc tion, and is provided witha long pinion (not shown), the teeth of which mesh with the teeth of the discs to be driven. rl‘he construction shown in Figs. 9, 1c, and ii operates as follows: 0n each revolution of shaft" rod as is reciprocated and moves yoke as back forth. Both pawls es move with the yoke, and one or the other oi‘ the pawls engages its respective ratchet wheel use, ldiia, depending on ‘the position of bar use. When a rider on chain tllii iies beneath the harness lever tilt, the lever raised and this raises bar Hi2. In such upward movement of bar m2‘, the lower end of the upper slot tilt engages pin lilii on the upper pawl iii: raises the pawl free of ratchet wheel ltd, this movement of the pawl being resisted by spring M43 connecting the pawl to the bar. At the same time, lower pawl is raised by its spring lid connecting the pawl to bar m2, and means. hit i 3. in loom, the combination of aplurality of warp, shedding discs, means operativelv con= necmd to the discs for rotating them in either direction, control means operative only for con trolling-the operation oi‘ the rotating means, a pattern device'for controlling the control means, and a drive shaft for operating Tooth the rotat= ing means and the pattern devicel v 4. In a loom, the "combination a plurality of warp shedd discs, means operatively (1021 nected to the discs for rotating them in either direction, control means operative only con", trolling the operation of the ‘rotating means, a ‘pattern device for controlling the control means, and means including a shaft and earns thereon for operating both the rotating means and the ‘ pattern device, 5. In a loom, the combination of a 30 ‘warp shedding discs, means 0 opera ‘nected to the discs for rotating them pwise in the end of the pawl moves into operative rela dd either direction, control means 0 ive only tion with the teeth on ratchet wheel Edda. On for controlling the operation of the rotating the next movement of rod es and yoke as to the means, a pattern device for control con» left, pawl 9%} causes its ratchet wheel to be ad trol means, means acting on the rotati 2; means vanced by one tooth, and this causes clockwise to arrest the rotation of the discs at the end of rotation of shafts toil and 34' and counterclock as each step in their movement, and a drive shaft wise movement of the discs driven by shaft 365'. for operating the rotating means and the pattern Shaft it? is advanced stepwise by appropriate device. ‘ means, as, for example, a ratchet wheel on the 6. In a loom, the combination of a plurality shaft, similar to ratchet wheel 58, a pawl for . oi‘ warp shedding discs, means operatively con‘ moving the ratchet wheel, and cam means for fad nected to the discs for rotating them stepwise in actuating the pawl. ,So long as a, rider m8 on the chain lies beneath lever MM at each period of rest of the chain, bar Hi2 will remain elevated, and lower pawl 9d will be 'e?ective. Whenever either direction, control means operative only for controlling the operation of the rotating means, a pattern device for controlling the control means, means'acting on the rotating means to arrest the a chain link not provided with a rider comes a rotation of the discs at the end of each step in ‘ their movement, and means including a shaft and beneath lever HM, bar N32 is allowed to move down, and this causes upper pawl 99 to become effective and the lower pawl to become ineffective. cams thereon for‘ operating the rotating means and the pattern device. The discs are thus rotated stepwise in one direc- , 7. In a loom, the combination of a plurality of tion or the other by rotation of shaft 36', the so warp shedding discs, means operatively con direction of rotation of which is determined by nected to the discs for rotating'them ‘stepwise in‘ the patternchain. ' either direction, said means including a pair of The loom illustrated and described is provided ratchet wheels and pawl means selectively oper with discs having four openings therethrough, so able on one or the other of the ratchet wheels, that each disc handles four warp yarns, or a 65 control means operative only for controlling the multiple of four yarns. It is to be understood action of the pawl means, a pattern device for that the discs may have a number of openings controlling the control means, and a drive shaft other than four, if desired, or the discs shown for operating both the rotating means and the may be operated to control only two yarns. pattern device. _ This application is a continuation-in-part of 70 8. In a loom, the combination of a plurality of my application Serial No. 551,830, ?led August» warp shedding discs, means operatively con nectcd to the discs for rotating them stepwise in either direction, said means including a pair of 1. In a loom, the combination of a plurality of ratchet wheels and pawl means selectively oper warp shedding discs, means operatively connected 75 able on one or the other of the ratchet wheels, 30, 1944. The claims are: . ~ ' aeraase control means operative only for controlling the action ‘of the pawl means, a pattern device for controlling the control means, and means includ ing a shaft and cams thereon for operating both the rotating means and the pattern device. 9. In a loom, the combination of a plurality of warp shedding discs, means operatively con nected to the discs for rotating them stepwise in either direction, said means including a pair of ratchet wheels andreciprocating-pawl means se a vice including a pattern element for controlling the action of the control. means, and means for operating the rotating means and advancing the pattern element stepwise, said means releasing the brake means at the beginning of each opera tion of vthe rotating means. 15. In a loom, the combination of a plurality " of warp shedding discs, a shaft operatively con nected to the discs‘ torotate them, a pair of 10 ratchet wheels oppositely disposed on» the shaft, means including pawls selectively engageable with respective ratchet wheels to rotate the shaft stepwise in opposite directions, brake means oper lectively operable on one or the other of the ratchet wheels, control means operative only for controlling the action of the pawl means, a pat able on the shaft, to arrest its movement. at the , , tern device for controlling the control means, vand a drive shaft for operating both the rotat 15 end of each step, control means for controlling the action of the rotating means, a pattern de ing means and the pattern device. vice including a, pattern element for controlling 10. In a loom, the combination of a plurality of warp shedding discs, means operatively con nected to the discs for rotating them stepwise the action of I the control-means, and a shaft ' provided with cams for operating the rotating in either direction, said means including a shaft, 20 means,ladvancing the pattern element stepwise, and releasing the brake means at the beginning a pair of oppositely disposed ratchetwheels on the shaft, and a reciprocating member carrying of each operation of the rotating means. pawls engageable selectively with respective ratch , 16. In a loom,_'the combination of a plurality of warp shedding discs, a shaft operatively con- ' et wheels, means for continuously reciprocating said member, control means for controlling the operation of the reciprocating member to se ‘nected to the discs to rotate them, a pair of ratchet wheels oppositely disposed on the shaft, a yoke carrying a pair of pawls engageable with lect the pawl which will engage its ratchet wheel, and a pattern device for controlling the control ' , respective ratchet-wheels, an arm movably sup ‘porting the yoke, means connected to the yoke means. 11‘. In a loom, the combination of a plurality 30 for shifting it relative to the arm for bringing a of shedding discs, a shaft connected to the discs ‘ selected pawl into operative relation to its ratch to rotate them, a pair of ratchet wheels oppositely disposed on the shaft, a yoke, a pair of pawls care et wheel, a pattern element, means controlled by the element for controlling the ‘yoke shifting ried‘by the yoke and engageable selectively with means, and a shaft having cams for advancing respective ratchet wheels, means for moving the yoke between .two positions to bring a selected , pawl into operative relation to its ratchet wheel, _ means for reciprocating the yoke, pattern means for controlling the operation of the yoke moving. means, and means for operating the yoke mov 40 ing means and the pattern means. 12. In a loom, the combination of a plurality of warp shedding discs, means operatively con nected to the discs for rotating them-stepwise in either direction, control means for controlling the operation of the rotating means, a pattern device for controlling the control means, means the pattern element stepwise and for moving the arm and the yoke thereon to cause the selected pawl to'engage its ratchet wheel and advance the first shaft by one step. » 1'7. In a loom,v the combination of a plurality of warp shedding discs, a shaft operatively con nected to the discs to rotate them, a pair of ratchet wheels oppositely disposed on the shaft, a yoke carrying a. pair of pawls engageable with respective ratchet wheels, an arm movably sup ‘porting the yoke, means connectedto the yoke for shifting it relative to the arm for bringing a selected pawl into operative relationv to its acting on the rotating means to arrest the rota tion of the discs at the end of each step in their ratchet wheel, a pattern element, means con movement, and a drive shaft for operating the ' shifting means, a brake drum on the shaft, an arm carrying an element engageable with the brake drum to stop rotation of the shaft, and a rotating means, the pattern device, and the ar resting means. ' I ' trolled by the element for controlling the yoke 13. In a loom, the combination of a plurality of warp shedding discs, means operatively con cam shaft having cams for advancing the pat tern element stepwise, for moving the yoke sup nected to the discs for rotating them stepwise in either direction, control means for controlling the operation of the rotating means, a pattern device for controlling the control means, means porting arm to cause the selected pawl to engage its ratchet wheel and advance the'?rst shaft by acting on the rotating means to arrest the rota tion of the discs at the end of each step in their movement, and means including a shaft and , cams thereon for operating the rotating means, the pattern device, and the arresting means. 14. In a loom, the combination of a plurality of warp shedding discs, a shaft operatively con 65 nected to the discs to rotate them, a pair of ratchet wheels oppositely disposed- on the shaft, means including pawls selectively engageable with respective ratchet wheels to rotate the shaft stepwise in opposite directions, brake means oper 70 able on the shaft to arrest its movement at the, end of each step, control means for controlling the action of the rotating means, a pattern de ‘ one step, and for swinging the second arm to free the element thereon from the brake drum. 18. In a loom, the combination of a plurality of warp shedding discs, a shaft connected to the ' discs, means for advancing the shaft stepwise in opposite directions, said means including ratchet means on the shaft, a reciprocable mem- _ ber, a pair of pawl elements carried by the mem ber and alternately. engageable with the ratchet means, means for reciprocating the member, the pawl elements moving in unison and in the same direction with it, control means for controlling the action of the pawl elements on the ratchet means, and a pattern° device for controlling the control means. . _ - SAMUEL P. PARKER.