US2400342A - Pattern control mechanism for warp drawing in machines - Google Patents

Description

May 14, 1946. v R. P. DRAKE 2,400,342

PATTERN CONTROL MECHANISM FOR WARP DRAWING IN MACHINES Filed April 28, 1944 5 Sheets-Sheet l INVENTOR v Y YRusse/l P. Drake My v.44

' ATTORNEYS R. P. DRAKE 2,400,342 PATTERN CONTROLMECHANISM FOR WARP DRAWING IN MACHINES 'May 14 1946.

Filed April 28, 1944 5 Sheets-Sheet 2 Russ ell F. Drake R. P. DRAKE 2,400,342

Filed April 28, 1944 5 Sheets -Sheet :5

I l 5555 5" vim I INVENTOR Russell, P .Dr'a/fe fiA/LL.-JA1 ATTORNEYS Q 3 E 1/1.. ,dn \R. 1 mm x v \V r L M,

PATTERN CONTROL MECHANISM FOR WARP DRAWING IN MACHINES May 14, 1946.

May 1 4, 1946.

R. P. DRAKE PATTERN CONTROL MECHANISM FOR WARP DRAWING IN MACHINES Filed April 28, 1944 5 Sheets-Sheet 4 00600006 OOOOOOOOO ooooo 0 D S R a m m N O E V Y W N @A le 0 May 14, 1946. v R. 'P. DRAKE 2,400,342

PATTERN CONTROL MECHANISM FOR WARP DRAWING IN MACHINES Filed April 28,1944 5 Sheets- Shet 5 lNVENfOR Russell P. Drake ATTORNEYS V Patented May 14, 1946 PATTERN CONTROL MECHANISM FOR WARP DRAWING IN MACHINES Russell P. Drake, Caledonia, 111., assignor to Barber-Colman Company, Rockford, 111., a corporation of Illinois Application April 28, 1944, Serial No. 533,160

27 Claims.

The invention pertains to machines for drawing in warps, and has particular reference to an improved control mechanism for such machines of the type in which a perforated pattern sheet is employed to govern the selective operation of various devices such as heddle release and separatorrods.

The primary object of the invention is to provide a control mechanism of this character in which the pattern sheet operates positively to establish a driving connection between the selectively operable elements and the power source.

Afurther object is to provide a pattern control mechanism of the character set forth in which a series of elements to be actuated selectively are arranged for movement positively under the control of the pattern into and out of driving relation to a common actuator.

Still another object is to provide for the positive I actuation of a series of feelers by power driven cam means, under the control of a perforated pattern sheet. p

Theobjects of the invention thus generally stated, together with other and ancillary advantages, are attained by the construction and arrangement shown by way of illustration in the accompanying drawings forming a part hereof, in which:

Figure 1 is a fragmentary plan view of a warp drawing machine embodyingmy invention.

Fig. 2 is a fragmentary transverse vertical sectional, view taken approximately in the plane of line 22 of Fig. l.

Figs. 3 and 4 are fragmentary transverse sectional views similar to Fig. 2 and illustrating the operation of the pattern feelers.

Fig. 5 is a longitudinal sectional view taken approximately in the plane of line 5-5 of Fig. 1 but on an enlarged scale.

Fig. 6 is a transverse sectional view on an enlarged scale taken approximately in the plane of line 66 of Fig. 1.

Fig. 6a is a fragmentary sectional view of the pattern drive mechanism, this view being taken approximately in the plane of line 6c6a of Fig. 1.

Fig. 7 is a fragmentary plan view of the pattern drum and feeler mechanism with parts broken away and in section to show details of construction.

Fig. 8 is a fragmentary vertical sectional view taken on line 8-8 of Fig. '7 and showing especially a cam means for reciprocating the pattern drum.

tively operable elements of a warp drawing machine. it will be described. with particular reference to the operation of the heddle release mechanism comprising a series of shafts l1 and I2, the former constituting the usual release rods, and the latter separator worm shafts or control rods. Each of the rods II is shown as equipped at one end with a spur gear [3 (see Fig. 5) by which it is driven from a meshing spur pinion [4 on a parallel worm shaft 12. Both of the shafts I1 and [2 are journaled attheir rear ends in a frame member 15.

The shafts H and 12 are arranged for actuation selectively under 'patterncontrol by means 7 of a reciprocatory actuator. As shown, the actu- Fig. 9 is a fragmentary transverse sectional view of a modified form of motion transmitting mechaator is in the form of a rack bar 16 slidable in the frame member l5, and each of the shafts 12 has a rearward extension I1 upon which is splined a sleeve 18 carrying a spur pinion 19 for movement into and out of engagement with the rack bar. The sleeves I8 are also grooved circumferentially as at 20 for connection with selectively actuated shifter bars 2|.

The shifter bars, which are also slidable in the frame member 15, are normally urged by contractile springs 22 to carry the gears 19 out of mesh with the rack bar 16. As shown in Fig. 5, the gears normally occupy a position to the left of the rack bar, and they are locked in this position by tongues 23 integral with the respectivepinions and cooperating with slots 24in a stationary plate 25.

It will be observed that the rack bar 16 constitutes a common actuator for the pinions [9, the latter constituting a series of elements to be actuated positively under the control of the pattern. An important feature of the present invention resides in the shifter mechanism whereby the pinions 19 are moved positively into driving engagement with the rack bar. In the embodiment of the invention illustrated in Figs. 2 to 4 inclusive, the pattern sheet itself constitutes a motion transmitting element. For this purpose, the sheet 26 cooperates with a perforated drum. 2]

(Fig. 2), and a reciprocatory motion is imparted to the drum and therefore to the pattern sheet while, at the same time, the drum is intermittently advanced rotatively to present successive rows of holes in the pattern opposite a series of feelers 28.

As shown in Figs, 1, 2 and '7, pattern 26 is provided with successive rows of holes 29 arranged in different combinations with one or more imperforate areas 29 operative to block the feelers against passage through registering holes 33 in the drum 21, the holes 30 being arranged in circumferentially spaced rows corresponding to the spacing of the rows of holes 29, with one hole for each possible hole position in each row of the pattern, In order that the imperforate areas 29 of the pattern may be effective in the reciprocation of the drum (Fig. 4) to impart movement to corresponding feelers, the pattern is made of sheet metal or similar strong but flexible material.

The feeler elements 28 are in the form of rods or pins formed integral with motion transmitting bars 32 (Fig. 2), the pins and bars being disposed perpendicular to the axis of the drum 2]. The bars 32 also extend perpendicular to the shifter bars 2| with which they are connected by idler gears 33 meshing with racks 34 and 35 formed respectively in the bars 2| and 32 (Figs. 1 and 2). These bars may be slidably supported and guided in any suitable way. As shown, they are mounted in appropriate slideways formed in the frame member 36, and the latter also provides a mounting for bearing sleeves 37 for stud shafts 38 carrying the idler gears 33.

For imparting reciprocating motions both to the actuator rack l6 and the perforated drum 2?, while at the same time advancing the drum rotatively, all in proper timed relation, a power mechanism is provided comprising in the present instance two cam shafts 39 and .49 (Figs. 6 and 8) suitably journaled in the framework of the mechanism carriage. The shaft 39 extends in a front to rear direction at one side of the drum 2'! and carries two cams 4| and 42, one for actuating the rack l6 and the other for rotatin the drum. The other shaft 46 extends parallel to the axis of the drum and carries cam means, generally designated 43, operatively associated with the drum to reciprocate it.

The rack bar actuating cam 41 comprises a drum fast upon the shaft 39 and having an annular rib 44 projecting between two spaced rollers 45 connected to the rear end of the rack bar. As herein shown, such end of the bar is supported upon a slide 46 appropriately guided in ways 41. Studs 48 carrying the rollers (i extend both through the slide and the rack bar.

The cam 42 operates to advance the drum with a stepbystep motion through the medium of a bell crank 49. The latter is pivoted at 50 at a point rearwardly of the drum and has a depending arm 5| with a roller 52 engaging in a groove 53 in the cam 42. The other arm 54 carries a segment 55 adapted for cooperation with a sprocket 56 fast on the drum, when the latter is in its rearmost position (Fig. 6), but is disengaged from the drum (Fig. 6a) when the latter is moved forwardly by the operation of the cam means 43. It will be understood that the bell crank is returned by its cam while the drum is in its forward position.

Rotation of the drum in the manner set forth causes the pattern to be advanced step-by-step a distance corresponding to the spacing of the .disposed forwardly of the drum.

To permit of an adjustment of the pattern manually-relative to the feelers 28 when the drum is in its rearmost position and therefore with the segment 55 meshing with the sprocket 56, the segment is formed on a slide 6| (Fig. 6a) mounted in the arm 54 of the bell crank 49. The slide is yieldably urged by a spring 62 to an advanced or operative position determined by the engagement of one end of a slot 63 with the pivot pin 53 of the bell crank. For convenience in manually withdrawing the segment 55 from engagement with the sprocket, the slide may be equipped with a fingerpiece 64.

The drum 2'! may be mounted for reciprocation in anypreferred way. -As shown, it is carried upon a rocker member 55 (Figs. 6 and 8) pivotally supported on a rockshaft 66 parallel to and somewhat rearwardly of the cam shaft 40. For rotatably'supporting the drum, the rocker has spaced upwardly extending arms 61 and 68 having suitable bearings for the support of a shaft 83 upon which the drum is mounted.

The cam means 43 for reciprocating the drum 2! is preferably of the double roller follower type. Thus it comprises two' disk cams 10 and 1! fast on the cam shaft 40 and respectively coacting with roller followers T2 and 13 on the rocker 65. For the purpose of rotatably supporting the follower rollers, the rocker has a pair of forwardly extending arms 16.

The motion imparted to the perforated drum 2! is also utilized to restore to their initial positions the operated feelers 28 and therefore the shifter bars'32and 2!, the latter being connected with the gears I9. To this end, the rear ends of the feelers are slidably supported in a blanking slide ll supported on stationary slideways 18 for actuation by the rocker 65. The slide is of channel shape in cross section (Figs. 2 to 4) and has two arms I9 at opposite ends extending rearwardly for connection with the opposite ends of the drum supporting shaft 69 (Fig. 8). The connections between the arms 19 and shaft 69 are sufficiently loose to prevent binding of the slide in its ways as an incident to the slight arcuate motion imparted to the shaft. The blanking of thefeelers occurs in the return movement of the drum at the end of each cycle. For this purpose the feelers are notched to provide shoulders for coaction with a flange 8! on the forward side of the slide (Fig. 2).

Power for the actuation of the . cam shafts 39 and 40 is derived from an electric motor 82 (Fig. 1) operatively associated with a main drive shaft 83 connected by bevel gearing 84 to the cam shaft 39, the latter in turn driving the cam shaft 40 through bevel gearing 85 (Fig. 6). The motor has a belt and pulley connection with a differential drive unit 86 and this unit in turn is connected to the main drive shaft 83 by spur gearing 81. A control mechanism of any suitable character is associated with the differential unit, this mechanism including in the present instance abrake 88 and clutch 89. A clutch and brake shift mechanism 90 is arranged for operation by an attendant stationed at the front of the machine. For this purpose, a hand control rod 9| pivoted at 92 is connected by a link 93, bell crank 94, andlink 95, to a shifting sleeve 96.

. In operation, the cam shafts 39.and 40, are driven continuously with the result that reciprocatorymotions are imparted to the actuator bar I6 .and to the rocker 65 while the perforated drum is advanced rotatively, with a step by step motion, all in proper timed relation to each other. In each cycle of the machine, the cam 42 is operated to actuate the bell crank 49, swinging the gear segment 55 upwardly a predetermined distance sufiicient to impart an advancing movement to the pattern 26 corresponding to the spacing of the rows of holes 29 therein. Thereupon the drum is shifted forwardly'by the operation of the cam means 43', disengaging the sprocket I 56 on the drum from the segment 55 and permitting the free return movement of the segment by the cam 42.

In each forward movement of the drum, the feelers 28 are operated in combinations determined by the pattern, only those feeler elements being advanced which are blocked by 'unperfo- 7 rated areas 29 of the pattern, the remainder of the elements being permitted to remain idle by the presentation of holes in the pattern registering with holes in the drum. To insure that the pattern shall be held in proper relation with respect to the feelers, notwithstanding the disengagement of the actuator segment, the drum in its forward motion is engaged by the detent pin 58 entering one of a series of perforations 59 in the drum. I

Advancing movements imparted to the selected feeler elements 28 are transmitted by the bars 32 through pinions 33 and intermeshing racks 34 and. 35 to corresponding shifter bars 2| and sleeves with the result that certain of the gear elements or pinions I3 are drawn into intermeshing engagement with the common actuator bar I0. This occurs while the rack bar occupies its retracted position. Immediately, however, upon the engagement of the pinions with the rack bar, an advancingmovement is imparted to the bar through the operation of the cam 4I so that rotational movements are imparted to the selected gear elements and therefore to those of the devices which are to be operated in the given cycle as, for example, release rods II and control rods I2, through gears I3 and I4. The driving connections between the rack I6 and the selected gear elements I9 are maintained until the rack bar is restored to its initial position. Thereupon the perforated drum 21 is returned by its cam means 43 and with it the blanking slide I1, the flange 8| of the slide engaging with the shoulders 80 of the previously selected feeler elements to restore them to initial position as shown in Fig. 2.

It will be observed that by the construction and.

arrangement set forth, the selected elements, herein the spur gears I9, are actuated positively into driving engagement with the actuator I6 by power driven cam means acting through the reciprocatory drum and the perforated pattern sheet thereon. For this purpose, the pattern sheet must of course be sufficiently stifi to sustain the load imposed upon the feelers. In the event that such load is too great, or, in case it is desired to use a pattern sheet of less thickness,

the use of the pattern as a thrustelement may be limited to the establishment of. a positive motionv transmitting connection betweenthe feelers and ..a suitable power'actuated member; so that feelers 28 has formed integral therewith a couv, pling member91 having a pin and slot connection 98 with the rear end of the corresponding shifter bar'32'.

Each of the coupling members 91 is in the nature .of a latch yieldably urged in the direction of a stationary cam member 99, and the two members are provided with coacting cam surfaces I00 and MI for coaction in the initial portion of the advance of the feeler by the pattern. Addition-ally, the coupling member is formed with shoulders I02 for coaction with a rib I03 on the blanking slide to provide a positive driving connection between the feeler and the slide when the coupling member is cammed into engagement with the slide.

The motion imparted by the slide to each of the selected coupling members 91 is directly transmitted to a corresponding shifter bar 32' against the action of a spring 32 To this end, the rear end of each bar 32' abuts with a shoulder I00 (Fig. '11) formed between arms I00 straddling the bar and formed with the slots of the pin and slot connection 98.

' Preferably, the rear end portions of the shifter bars 32' are made resilient so asto provide the necessary spring means for moving the coupling members into disengaged relationto the cam slide. As shown, the bars 32' are biased in an upward direction so as to hold the coupling mem;

bers normally in engagement with the cam member 99, the latter being in the form of a cross bar common to all of the feelers. The coupling members are relatively narrow (Fig. 11) and the shoulders I02 are formed by cutting notches I04 in opposite sides of the memben the rib being notched as at I05 to receive the coupling members. The notches I04 also form forwardly facing shoulders I06 for engagement by the rib I03 of the blanking slide to reposition the feelers in the retraction of the slide. 7

In the operation of this alternative construetion, the feelers advanced by the pattern due to the blanking effect of any unperforated areas are shifted axially a short distance only (to the left as shown in Fig. 9). In such movement, the coupling members are cammed downwardly by the coacting cam surfaces I00 and I 0| to carry the shoulders I02 downwardly into driving relation to the rib I03 on the blanking slide H. In

this operation, the shifter bars 32' remain sta-.

tionary as permitted by their pin and slot connections 98.

In the continued forward movement of th selected feelers, with the pattern drum, the rib I03 on the slide acts upon the shoulders I02 of the coupling members carrying the latter forwardnext operation. At the same time, the feelers 28' are also restored or blanked.

I claim as my invention:

1. A pattern control mechanism for warp drawing machines comprising, in combination, a reciprocatory rack bar, a series of gear elements to be operated selectively into and out of driving relation to said bar, a drum having circumferentially spaced rows of holes and arranged to carry a pattern sheet having similarly spaced rows of holes together with imperforate areas, a series of feelers, one for each hole in each row of the drum, means for shifting the drum to carry the pattern thereon into engagement with the feelers to move them selectively, and means responsive to the movement of the actuated feelers to impart axial movements to one or more of said gear elements whereby to shift them into and out of mesh with said rack bar.

2. In a warp drawing machine, the combination of a reciprocatory rack bar, a series of gear elements adapted to be shifted selectively into and out of driving engagement with said rack bar, a drum having circumferentially spaced rows of holes and arranged to support a pattern sheet having correspondingly spaced rows of holes together with imperforate areas, a series of feelers one for each hole in each row, means for shifting the drum to carry said pattern into engagement with selected ones of said feelers, and shifter bars operatively connecting said feelers and said gear elements to shift the latter relative to said rack bar.

3. In a warp drawing machine, the combination of a reciprocatory rack bar, a series ofgear elements adapted to be shifted selectively into and out of driving engagement with said rack bar, a drum having circumferentially spaced rows of holes and arranged to support a pattern sheet having correspondingly spaced rows of holes together with imperforate areas, a series of feelers one for each hole in each row, means for shifting the drum to carry said pattern into engagement with selected ones of said feelers, shifter bars operatively connecting said feelers and said gear elements to shift the latter relative to said rack bar, and a blanking slide connected with said drum for movement therewith and having a lost motion connection with said feelers operative to return the feelers to initial position in the retracting movement of the drum.

4. In a warp drawing machine, the combination of a reciprocatory rack bar, a series of gear elements movable into and out of mesh with said rack bar, a pattern carrying drum mounted for shifting movement in a direction transversely of its axis, a series of feeler elements selectively operable in the shifting movement of, the drum, said feeler elements being operatively associated with respective ones of said gear elements whereby to move the latter selectively into engagement with the rack bar, and cam means forreciprocating said rack bar and said drum in timed relation to each other.

5. A pattern control mechanism for warp drawing machines comprising, in combination, an actuator member, a series of rotatable elements to be operated shiftable selectively into driving relation to said actuator member for rotation thereby, pattern control means including a drum and a series of feelers, means for shifting the drum to impart endwise movements to the feelers selectively, and means responsive to the movements of the feelers thus moved to shift corresponding ones of said elements into driving engagement with the actuator.

6. A warp drawing machine having, in combination, a series of devices to be operated selectively, a gear element for each of said devices, power driven means for actuating said gear elements, pattern control means selectively shifting said gear. elements into driving relation to said power driven means, said pattern control means including a reciprocating member and a series of elements arranged for operation selectively by said member and each operative to control one of said gear elements, and drive means for actuating said power driven means for driving said member in timed relation.

7. In a Warp drawing machine the combination of a reciprocatory rack bar, a series of devices to be operated each having a gear element movable into and out of mesh with said rack bar, means for selectively shifting said gear elements into driving engagement with the. rack bar comprising a reciprocatory member and a series of motion-transmitting bars arranged for positive movement by said member, there being one of said motion-transmitting bars for each of said gear elements, and cam means for imparting reciprocatory movements to said member and said rack bar successively.

8. A pattern control mechanism for warp drawing machines comprising, in combination, an actuator member, a series of elements to be operated shiftable selectively into and out of driving relation to said actuator member, a drum having circumferentially spaced rows of hole and arranged to carry a pattern sheet having similarly spaced rows of holes together with imperforate areas, a series of feelers one for each hole in each row of the drum, means for actuating the drum to carry the pattern thereon into engagement with thefeelers to move them selectively, and means including a shifter bar rigid with each feeler and operative to shift one of said elements into driving relation to said actuator.

9. In a warp drawing machine, the combination of a reciprocatory rack bar, a series of gear elements movable into and out of mesh with said rack bar, a pattern carrying drum mounted for shifting movement in a direction transversely of its axis, a series of feeler elements selectively operable in the shifting movement of the drum, said feeler elements being operatively associated with respective ones of said gear elements whereby to move the latter selectively into engagement with the rack bar, and cam means operative to impart shifting movements to said gear elements selectively and thereupon to impart an endwise movement tothe rack bar whereby to actuate the selected ones of the gear elements.

10. In a warp drawing machine, the combination of a series of feelers to be operated selectively, a perforated pattern carrying drum, a slide in which said feelers are mounted for movement radially of the drum, means for reciprocating the -drum in a direction axially of said feelers, said slide being connected for movement with the drum and said feelers being movable selectively in the shifting movement of the drum when engaged by the pattern sheet on the drum, a stationary cam member, and cam means on each of the feelers .coacting with said stationary cam member in the axial movements of the feelers toestablish a positive driving connection between the feelers and said slide.

:11. In a warp drawing machine, the combina tion witha perforated drum adaptedto carry a 2,4.oo,34a V merits, power driven means for impartingastep perforated pattern sheet, a series o f feeler ele ments arranged for movement radially of the drum, means for r'ecip rocatingthe drum to carrythe pattern sheet into engagement with selected ones of said feelers to shift themselectively, a member movable with-the drum, and cam means operative as an incident to the-movement of selectcd feelers by-the pattern tocarry them into positive driving relation to said member.

12. In a warp drawing "machine, the combination of a series of feeler elements to be operated selectively, a poweractuated'member, a plurality of parts to be*operated, one for each of said feeler elements, 'andmeans operative as an incident to the movement of selected ones of said feeler elements to establish a driving relation between the feeler elements and said power actuatedmember.

14. In a warp drawing machine, the combination of a series of elements, to be actuated selectively under the control of a pattern, a poWer driven member, and a stationary cam member, each of said feeler elements having a surface adapted for coaction with said cam member in the movement of the element whereby to establish a driving relation between such actuated feeler element and the stationary cam member.

15. In a warp drawing machine, the combination of a part to be operated, a pattern feeler operatively associated with said part, a power driven member, said feeler and-said member having operating'driving shoulders normally disengaged,

and a stationary cam member, said feeler having a cam surface operative in the endwise movement of the feeler by the pattern to coact with said stationary cam member whereby to shift said feeler to carry said driving shoulders into operative association.

16. In a warp drawing machine, the combination of a series of feelers to be operated selectively, a perforated pattern carrying drum, a series of parts to be operated by the respective feelers, a power operated member, and cam means actuated as an incident to the movement of any one of said feelers by said pattern means to effect a positive driving connection between said member and such feelers.

17. In a warp drawing machine,'the combination of a series of feelers to be operated selectively, means controlling the actuation of said pingmovement to the drum including areciprocating member having 'a drive gear element thereon, a driven gear element carried by the drum and meshing with said'driving gear element in the retracted'position of the drum, and means for shifting said drum in timed relation to the actuation of said member to carry a pattern on the drum into operative association with said series' of elements and to simultaneously effect a disengagement of said gear elements, said driving gear element being mounted on said member for movement manually into disengaged relation with respect to the driven gear element.

19. In a warp drawing machine, the combination of a series of feelers to be operated simultaneously, a pattern drum, and means for imarting a stepping movement to the drum, in-

cluding a gear element on the drum, a power actuated rocker member and a gear element carried by the rocker and adapted 'to mesh with the gear element on the drum, and means form'anu ally shifting the rocker gear element into and out Of mesh with the gear element on the drum.

20. In a warp drawing machine, the combination of 'a series of feelers to be operated selectively, a pattern carrying drum reciprocable tofeelers including a drum, means imparting a step- Ward and from said feelers to actuate the same selectively, and means connected with the drum and operatively engaging the feelers in theretracting movement" of'the drum to restore the previously actuated'feele'rs to their initial positions.

- 21. In a warp drawing machine, the combination of a series offeelers, a drum having circumferentially spaced rows of perforations and adapted to receive a pattern in operative association therewith, said drum having correspondingly spaced rows of holes and imperforate areas and being mounted for movement toward and from the feelers to shift those of the feelers which correspond with the imperforate areas of the attern, and a blanking device movable with the drum and operative in the movement of the latter away from the feelers to restore the previously operated feelers to initial position.

22. In a warp drawing machine, a series of feelers to be operated selectively, a perforated pattern carrying drum, and a slide supporting said feelers in operative association with said drum, said drum being mounted for movement to carry a pattern thereon into engagement with certain of said feelers to impart an endwise shifting movement thereto, and said slide having a lost motion connection with each of said feelers operative to permit movement of the slide relative to the feeler when such movement is permitted by the pattern and adapted to retract any of the operated feelers as an incident to the return movement of the drum. 7 I

23. A pattern control mechanism for warp drawing machines comprising, in combination, an actuator member, a series of rotatable elements mounted for shifting movement into and out of driving relation with said actuator member for rotation thereby, a drum having circumferentially spaced rows of perforations and adapted for operative association with a pattern having similarly spaced rows of perforations and imperforate areas arranged in diiferent combinations, a series of feelers, means for shifting said drum to carry imperforate areas on the pattern sheet into engagement with corresponding ones of the feelers, and means including a series of bars axially alined with said feelers for transmitting the movements of the feelers to corresponding ones of said rotatable elements whereby to shift the latter into driving relation to said actuator member.

24. A pattern control mechanism for warp drawing machines comprising, in combination, a reciprocatory rack bar, a series of gear elements mounted for shifting movement into and out of driving relation with said rack bar for rotation thereby, a drum having circumferentially spaced rows of perforations and adapted for operative association with a pattern having similarly spaced rows of perforations and imperforate areas arranged in different combinations, a series of feelers, means for shiftingsaid drum to carry imper forate areas on the pattern sheet into engagement with corresponding ones of the feelers, means for transmitting. the movements of selec tively actuated feelers to corresponding ones of said gear elements whereby to shift the latter into driving relation to said rack bar, and posi tively acting means operative upon the return movement of the drum to disengage said elements from the actuating member.

25. A pattern control mechanism for warp drawing machines comprising, in combination, actuating means, a series of rotatable gear elements mounted for shifting movement into and out of driving relation with said actuating means for rotation thereby, pattern control means including a drum and a series of feelers, means operative in response to the selective actuation of feelers to shift corresponding ones of said rotatable gear elements into driving relation to said actuating means, and positively acting means operative to disengage said elements from said actuating means.

- 26. A pattern control mechanism for warp drawing machines comprising, in combination, a reciprocating rack bar, a series of rotatable gear elements mounted for shifting movement into and out of driving relation with said rack bar, pattern control means including a drum and a series of feelers, means including a series of shifter bars connected with said gear elements to shift the same in accordance with the selective actuation of the feelers, and means for withdrawing said shifter bars to disengage said elements from said rack bar.

27. A pattern control mechanism for warp drawing machines comprising, in combination, a

, reciprocating rack bar, a series of rotatable gear elements mounted, forshifting movement into and out of driving relation with said rack bar, pattern control means including a drum and a seriesof feelers, means including a series of shifter bars connected with said gear element to shift the same in accordance with the selective actuation of the feelers, and means operative as an incident to the disengagement of said gear elements from the rack bar to lock the elements against rotation.

RUSSELL P. DRAKE.

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