US2050780A - Automatic mechanism for frame embroidery machines - Google Patents

Description

Aug. 11, 1936. A B ANN HA 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1934 14 SheetsSheet 1 1936- A. A.- BOHMANN ET AL 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1954 14 Shets-Shet 2 2.2 '15 1&

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1936- A. A. BOHMANN ET AL 2,050,78

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES I Filed Feb. 8, 1934 14 Sheets-Sheet s fa mmmzzn Aug. 11, 1936. A. A. BOHMANN El AL r 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1954 14 Sheets-Sheet 4 F g.6 A

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Aug. 11, 1936. A. A. BOHMANN ET AL 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1934 14 heets-sheet 5 Frr/k 1, 1936. A. A. BOHMANN ET AL 2,050,780

AUTOMATIC MECHANISM FOE FRAME EMBROIDERY MACHINES Filed Feb. 8, 1934 14 Sheets-Sheet 6 br g MK Aug. ,11; 1936. A; A. BOHMANN ET AL 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb; 8, 1954 14 Sheets-Sheet '7 Fen fawn A 1936. A. A. BOHMANN Er AL 2,050,780

AUTOMAT IC MECHANISM FOR FRAME EMBROIDERY MACHINES 5 7;: AUMQQM Q Aug. 11, 1936.. A. A. BOHMANN ET AL 2,50,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1954 14 Sheets-Sheet 10 Fig.24-

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Aug. 11, 1936. A. A. BOHMANN ET AL 2,050,789

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8. 1954 14 Sheets- Slieet 11.

4% 2m. 29 1 I 35 2.52. 85 411' s Aug. 11, 1936.- A. A. BOHMANN ET AL 2,050,730

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1934 --14 Sheets- Sheet 12 TVs/7hr 7 111$ LEM (hm;

1, 1936. A. A. BOHMANN ET AL 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1934 14 Sheets-Sheet l3 XXVll xxvm Allg- 1936. A. A. BOHMANN ET AL I 7 2,050,780

AUTOMATIC MECHANISM FOR FRAME EMBROIDERY MACHINES Filed Feb. 8, 1934 14 Sheets-Sheet, 14

Patented Aug. 11, 1936 UNEE Arthur Albrecht Bohmann,

Dresden-Leubnitz,

and Kurt Gustav Schcibel, Dresden-Strehlen, Germany, assignors to Wiirker G. m. b. H,

Dresden, Germany Application February 8 1934, Serial No. 710,360

in Germany February 11, 1933 67 Claims.

The invention relates to automatic apparatus for frame embroidery machines and aims not only at effecting the entire adjustment of the intermediate members by means moved from the automatic driving means but also at utilizing this means in known manner for the frames movement itself. The invention consists in this that a slide carriage moved by the automatic drive in a closed path in its movement in the one direction moves an entraining means released from the means for shifting the frame and in its reverse movement after previously efiected connection of the entraining means with the means for displacing the frame returns to initial position, and thereby effects the frame movement.

The invention resides moreover in the particular construction of the carriage and of the means adjusted by the carriage and effecting the embroidery frame displacement as also in the connection of the adjusting member carried by the carriage with the intermediate members adjusted by the needle plates.

Thus the carriage may consist of a slide moved to and fro with adjusting means switches mounted thereon for an adjusting member which is mounted on a slide or the like movable transversely of the movement of the carriage and carrying the entraining means for the frame displacing means. Many different advantages result from such an arrangement which advantages will be explained in the description of the embodiment now to be described.

In place of the carriage, a pin may be provided operated by a crank drive or the like, the pin co-operating with the grooves or slots in the adjusting member to which the plate movement is transmitted and a connecting rod engaging the pin or the like and being connected to the rack bar or the like of the frame differential drive.

Thus it is possible with a suitable construction of the adjusting member to facilitate the displacement of the rack bar not only with respect to its direction of motion but also with respect to the amount of its displacement.

In the adjusting member may be provided a number of guide tracks on both sides of a neutral guide track and corresponding to the values to be adjusted in which the pin slides according to the position of the adjusting member.

In order after adjustment to relieve the intermediate members controlling the adjusting members of pressures or the like it is preferable to block the adjusting member from the plates by a bolt or the like.

Preferably the construction of the automatic device is such that the jacquard card support and the driving means with the needle plates controlled by the jacquard card is arranged over the bed plate of the embroidery machine, the remaining automatic driving means on the other hand being disposed beneath the bed plate.

Such an arrangement is possible since the jacquard card mechanism with the associated needle plates is structurally separate from the remaining automatic drive and both parts are connected with one another only by one or more rods.

As a result all the parts (jacquard card arrangement) which require to be accessible to the operative can be arranged in any suitable position above the machine plate, while all the parts which operate purely automatically and require no special treatment can be arranged beneath the bed plate, where they do not interfere with attendance on the embroidery machine.

It is of importance that the transmission of the plate movement initiated by the jacquard card from the automatic embroidery device can be effected by means of a quite simple bell crank lever mechanism.

For the purpose of considerably simplifying the structure it is preferably arranged so that the plates displaced by the jacquard cards themselves are formed after the manner of design cards so that the ends of the rods moved towards them can be formed as points and thus can eifect an operation which transfers the automatic drive to the position initiated by the jacquard card or leaves the drive of the automatic device unaffected.

The accompanying drawings will serve for a better explanation of the invention.

Fig. 1 is a front View of the whole frame embroidery machine with the automatic mechanism forming the subject of the present invention. Fig. 2 is a plan view thereof, Fig. 3 a side elevation. Fig. 4 shows a part of the plan shown in Fig. 2 to enlarged scale. Fig. 5 is a vertical transverse section on the line VV of Fig. 4. Fig. 6 and 6A constitute together a vertical longitudinal section of the automatic device. Fig. '7 a vertical cross section on the line VIIVII of Fig. 6A. Fig. 8 a horizontal longitudinal section on the line VIIIVIII of Fig. 6. Fig. 9 shows a part of that shown in Fig. 6A to enlarged scale. Fig. 10 is a vertical cross section on the line XX of Fig. 9. Fig. 11 is a separate detail of Fig. 9. Fig. 12 is a vertical cross section on the line X[I--XII of Fig. 6 to enlarged scale, Fig 13 a part of what is shown in Fig. 6A to enlarged scale. Figs. 14 to 18 are details. Figs. 19 to 22 are details in which the possibilities of adjustment are explained diagrammatically. Fig. 23 is a graphical illustration explanatory of the embroidery frame movements. Fig. 24 and Fig. 24A constitute together a vertical longitudinal section through an automatic device of another embodiment. Fig. 25 a vertical cross section on the line XXV-XXV of Fig. 24A. Fig. 26 is a vertical cross section on the line XXVIXXVI of Fig. 24. Fig. 27 shows a further modification of the arrangement forming the subject of the invention. Fig. 28 is a vertical cross section on the line XXVIIIXXVIII of Fig. 27. Figs. 29 to 32 are details in which are shown diagrammatically the possibilities of adjustment of the arrangement illustrated inFigs. 27 and 28.

The invention will now be described with reference to Figs. 1 to 5.

In the figures, l denotes the pedestal of the embroidery machine on which the bed plate 2 is supported. Above the bed plate 2 are mounted separate needle heads 3 which are connected to one another by a transverse support 4. The support 4 is secured to three arms 5 connected with the pedestal and extending over the bed plate. The separate needle bars indicated by 6 are reciprocated vertically as in a sewing machine. Beneath the bed plate 2 are arranged adjacent the separate needle heads 4 the hook shuttles for the lower threads which like the needle bars are driven by means not shown from the main shaft 1.

The separate parts of material to be embroidered are stretched in embroidery frames 8 which are secured to a common embroidery frame work 9. After each needle insertion and after the needles have been retracted from the material, the frame 9 must be displaced in order that those parts of the material in which the new stitch is to be formed come beneath the needle points. The movement of this embroidery frame is effected by the automatic mechanism forming the subject of the invention of which the two casings are indicated in Fig. 1 by A and B. Adjustment of this automatic mechanism is controlled by a jacquard card device indicated at C in Fig. 1.

It is to be observed that in order that each part of the work can be brought beneath the. correspinding needle point the embroidery frame must be shiftable in two directions at right angles to one another parallel to: the plane of the table, viz. in a direction which is parallel to the longitudinal line of the support 4 and in a direction at right angles thereto. For this purpose the two rack bars I9, H are provided each adapted to be moved by a separate gearing provided in the machine, said rack bars being shiftable in their longitudinal direction in the casing B of the machine.

The rack bar I I which effects the displacement of the framework 9 in its longitudinal direction engages by means of a pin l2 upwardly extending and fastened at its end in a rail [3 of U- shaped. profile which is secured to the under side of the embroidery frame 9. In order that the frame will be satisfactorily guided there is provided on the upper end of the pin l2, a guide block M which fits in the U-shaped profile of the rail l3. If thus the rack bar H is displaced, then the framework 9 is moved therewith. As is clear particularly from Figs. 4 and 5 the pin l2 engages in a slot 2 in the bed plate 2.

The rack bar I0 is provided at its right hand end with a guiderail of channelled form open at its upper side in which engages the guide block IS. The guide block I6 is rotatably mounted on the one arm of a bell crank lever IT. The bell crank lever I1 is arranged to swing about the pivot 2 secured to the bed plate 2.

To the bell crank lever H is connected a rod i8 which is connected to the ends of the bell crank levers i9, 20. The bell crank levers i9, 29 are adapted to turn on pivots 2 secured to the machine bed plate 2. On the free arms of the bell crank levers ll, I9, 29 are pro-vided pins I7, 19128 which project through suitable arcuate slots 2| in'the bed plate into the path of the framework 9. In the path of the pins l1, i9, 28' there are secured on the lower side of the frame work 9 channelled rails 22 into which the pins IT, IS, 20' project. If thus the rack bar it is moved either to the left or to the right, the levers l1, I9, 20 are turned about their pivots and produce a displacement of the frame work 9 at right angles to its longitudinal axis.

The separate movements of the framework 9 which in conjunction with the insertions of the embroidery machine needles produce the embroidery design are produced by the jacquard card 23 which is unwound from the reel 24 led over the card cylinder 25 and finally wound on a reel 26. The'two rollers 21 serve as guide reels and-ensure that the jacquard card 23 is properly guided around the card cylinder 25. The spindles 24, 26 on the jacquard card reels are secured to a bracket 28 in the machine frame. The step by step movement of the jacquard card is eifected by the card cylinder 25. The particular feeding mechanism will be hereinafter described.

The spindle 29 of the card cylinder 25 is provided on a slide 30 which is mounted so that it may be moved to and fro on the guide rods 3|. In the position shown in Fig. 6A the slide 39 carrying the card cylinder 25 is in its extreme right hand position. By mechanism which will be later described the slide is moved to the left and back again. In the movement of the card cylinder 25 to the left, the card meets the plate needles 32, 32. The plate needles 32, 32 are mounted on the plates 33, 33 which are arranged in pairs in the manner illustrated in Figs. 7. These plates are formed on their lower side with recesses or projections. If the plates are in the unused position, 1. e. the starting position, then the projections or recesses in these plates are in register with the pushers 34 to 34 arranged adjacent them in the manner illustrated in Fig. 13, the plate 33 being pushed out for the sake of clearness in order that its shape can be seen. The pushers 34 to 34 are mounted so as to be movable vertically in the carrier 35. To the pushers 34 to 34 are connected rods 36 to 36 which at their other ends are connected with two T-shaped levers 31, 31, 38 and 38. It must here be noted that, as shown in particular in Fig. '7 the pushers 34 to 34 are of such width that they engage always in the plane of two plates associated with a pair of plates 33, 33'. Each pair of plates is thus arranged adjacent a set of rods 36 to 36 For eachpair of plates, also, is provided at the other end a pair of levers 31, 31 or 38, 38.

vAs in the embodiment illustrated the values of the geometrical row I, 3, 9, 21 havebeen used, then as shown in particular in Figs. 7 four pairs of plates 33, 33 are necessary for one direction of movement of the framework. For the direction of movement at right angles thereto four such pairs of plates are also necessary but as these plates are exactly the same as those acting in the other direction, they are not shown inthe drawing.

Each pair of levers 31, 31' and. 38, 38? are mounted on spindles 39 which are carried by the rock levers 43, 3!. While the lever 43 is rotatably mounted in the machine frame at 32, the pivot 43 secured to the machine frame is. provided for the lever 4 I. The lever 4| engages with its roller M3 in a cam groove 35 in a. cam drum 46. The cam drum is secured to the shaft 41 mounted in the machine frame. The shaft 41 is fitted with a bevel pinion 48 which meshes with a bevel pinion 43 mounted on the main shaft 1. The lever AI is connected by the link 53 with the rock lever 43 so that the lever 43 is moved at the same time as the lever M.

If the lever AI is moved by the cam groove 45 in clockwise direction, then the lever 43 is given the same movement and the pivots 39 are moved upwards. Then the rods 35-36 are also correspondingly moved upwards and the pushers 34 to 3& moved towards the plates 33, 33 for en-' gagement therewith.

To the downwardly projecting arms of the T- shaped levers 31, 31, 38, 33 are connected links 5I to 5I the ends of. which are connected to the connecting rods 52 to 52 The rods.52 to 52 are movable horizontally in the carriage 53. A pair of plates 33, 33' are associated with each T-shaped set of levers 31, 31, 33, 38, but when four pairs of plates are provided two carriages must be provided, so that in addition to the carriage 53 the carriage 53' is provided. These carriages 53, 53' are vertically movable in the casing B.

Each carriage 53, 53' is provided with two sets of switches which consist each of three meeting slots 54, 54', and 53 These slots are arranged adjacent the switch tongues 55, 55', 55 and 55 which are secured to the connecting rods 52, 52, 52 and 53 With the switch slots of each carriage co-operate the pins 55, 53. These are mounted on the lever 51, while the pins 53, 53 which co-operate with the second carriage 53 are provided on the lever 51. The levers 51, and 51 are rotatably mounted by means of the pivots 58, 53 in the slides 59, 59. On the slides 59, 59' are rotatably mounted by means of the pivots 33, 63' the rack bars 5!, El. The rack bars BI, 6| are provided with longitudinal slots 62 in which engage pins 63. The pins 33 are mounted on one end of the bell crank. lever 53 which by means of a roller 65 tracks the cam drum 35 of a cam disc 51. From the cam drum 33 the lever 65 intermittently receives a pivoting movement in. clockwise direction, the two rack bars 6 I, 3 I moving out of engagement with their corresponding pinions 33, 33. The pinions 53', 63 are mounted on the shaft 89. Their rotation is transmitted. by means of a differential gear to the pinion 13 which is also mounted on the shaft. This differential gear is shown in Fig. 12.

As shown in Fig. 12. the pinion 68 is mounted on a bush I3I which is freely rotatable on the shaft 69, and which is provided at its end with a pinion 32. The pinion 38 is mounted on a drum I33 which is freely rotatable on the bush I3I at one side and freely rotatable on a bush I35 at the other side. In the drum I33 are freely rotatable on the spindle I35 two connected pinions I36, I31. While the pinion I36 meshes with the pinion I32, the pinion I31 meshes with a pinion I38 provided on the bush I134. The

bush I34 is freely rotatable on the shaft 33 and! is provided at its free end with a pinion-.13'which;

co-operates with therackbar II. Obviously a drive such as shown in Fig. 6 must also be provided' for the rack bar I3'which, however, since it is exactly the same and acts like that shown in Fig. 6 is not shown separately in the drawings. 7

It should also be mentioned that with the pinions 68; 68 is associated an arresting and disengaging pawl H which is formed as a double armed lever and is arranged to turn freely on the pivot 12 of the bell crank lever 64. The free endof the pawl'lever II extends with the roller 13 into the cam groove 16 which is also provided onthe cam' drum 61'. The arresting pawl is provided at its upper end with a pointed tooth 1| which comes into engagement with the pinions 63, 68' after each movement thereof. to check the same. For this purpose the teeth of the two pinions asshown in Fig. 6; are somewhat pointed differing thus from the usual teeth. The feeding mechanism of the card cylinder 25 will be explained with reference to Figs. 9 to 11.

The spindle 29 on which the card cylinder 25 issecured is atboth sides of the card cylinder mounted in the slide 33' which is arranged to be displaced longitudinally on the guide rods 3|. The spindle 29 is embraced by the two lugs 11', 11' of the links 11 which are connected at the other'end' to-the two forked ends 18' of the link 13 by means of the pins 19. The link 13 is preferably'mounted at 33 on the casing A.

The roller 8| provided at the lower end of lever 13 co-operates with the cam BI provided on the cam drum 33. The lever 18 receives a pivoting movement from this cam.

In the position shown in Figs. 6A and 9 the upper ends 13' of the lever 13 are in the extreme right hand position. The slide 33 is also in its extreme right hand position. On the spindle 23 is also mounted a pinion 82 with which meshes a toothed" sector 83 adapted to turn about the pivot 83 on the frame arm A. To the toothed sector is connected at 83 the link 85 which at its other end is connected at 83 with the bell crank lever 81. The bellcrank lever 81 is pivoted at 33in the casing A and engages by means of the roller 89 provided at its free end in a cam groove 33 on the cam drum 35. On the spindle 29 is also mounted the belt pulley 9! over which passes a spiral spring 92 formed as a driving belt, and passing over a pulley on the spindle 2-6" of the jacquard reel 23 (Figs. 1 and 11).

It should be mentioned that in order to avoid slip of the jacquard card 23 on the card cylinder 25 it is provided at its ends with pins 25' which co-operate with corresponding rows of holes'23 provided on the edges of the jacquard cards. The card cylinder 25 which is suitably hollow is provided on its periphery with openings 25 which the plate pins 32, 32' can enter, when these pass through a corresponding hole in the. jacquard card.v The movement of the carriage 53, 53' is controlled from the eccentric 93 which is mounted on the shaft 93. The shaft 34 is. mounted'in the casing B and carries in addition to the cam disc 31 the bevel pinion 95 which meshes with the: bevel pinion 33 mounted on the main shaft 1. The eccentric 33 is embraced by an eye 91',.of the connecting rod 91 which is connected at 98 to a double armed lever 98. The double armed lever 38 is pivotally mounted at 99 in the casing B. To its free end 38 are connected asmany links. I33 as there are carriages. The links I33 are pivotally connected to the carriagesv 53, 53.

The modus operandi of the arrangement is as follows: 7 ,7

As soon as the card cylinder 25 is moved by the lever 18 into the position shown in Fig. 6A, the lever 81 is given by the cam 90 a partial rotation in a clockwise direction and the rod 85 connected with the lever 81 is pushed upwards and the toothed sector 83 given a corresponding movement about its pivot; As a result, however, the card cylinder 25 is also given a corresponding rotary movement in the direction of the arrow shown in Fig. 6A. Obviously the cam 95 is so arranged that the rotary movement imparted to the cylinder 25 will be of such amount that the next row of holes in the jacquard card 23 are brought in front'of the plate pins 32, 32. Then the lever 18 is swung by its cam groove 8| so that the cardcylinder 25 is moved into the position indicated in dotted lines in Figs. 9 and 11. The pinion accordingly moves out of engagement with the toothed'sector .83 so that the return of the parts 83, 85, 81 to their initial position -(see Fig- SA) has no efiect on the card cylinder 25. Since the spindle 29 of the card cylinder is connected by the driving belt 92 with the spindle 25 of the jacquard card winding reel a corresponding portion of the jacquard car is wound on the reel 26.

In the displacement of the card cylinder 25 towards the left the plate pins 32, 32 strike the jacquard card. Now according as the plate pins enter a hole or meet solid portion of the card 23, these pins remain in their initial position or are displaced to the left of Fig. 6A. If it is assumed that the plate pins 32' have met a solid portion of the card the plates 33' would be moved to the left in the manner shown in Fig. 14. After the card cylinder 25 has reached its left hand position for the purpose of contacting the jacquard card by the pins, the lever 4|, the roller 44 of which tracks the cam groove 45, is caused to move in the direction of the arrow indicated in Fig. 6A. The pivots 39 of the T-shaped levers 31, 31, 38, 38 are moved upwards. 35 to 36 the slides 34 to 34 are moved upwards for the purpose of contacting the plates. While the slides 34', 34 again meet the recesses whereby they remain in their initial position the slide 34 meets a projection as shownin Fig. 14 as a result of which it is moved into the position shown in dotted lines. While however the slide 34 is moved downwardly the slide 34 as it is connected with the slide 34 by the common T-shaped lever 37 is pushed upwards into the dotted position. This means however that the lever 31 has been turned in relation to the position shown in Fig. 6A that it comes into line with the lever 37. At the same time, however, by the movement of the lever 3'! the link 5! and the connecting rod 52 are moved towards the left. As a result the switch tongue 55 moves into the position indicated by dot and dash lines in Fig. 6. The switch slot 54 would thereby be free to the pin56. On the succeeding upward movement of the carriage 53, 53 effected by means of the rods 93400 the pin 56 is guided in the slot 54 while the pin 56', if no displacement of the switch tongues 55 and/or 55 has taken place in relation to the lower guide, passes into the slot 54 on the lower switch. The tilting of the lever 51 caused. thereby would, however, indicate a corresponding displacement of the same to the right in relation to its slide 59.

While the carriages 53, 53' move upwards, the lever 64 is so turned that the rack bars 6|; 6| are out of engagement with their pinions 68, 68'.

By means of the rods Thus first of all only a displacement of the slides would take place. After the rack bars, 6|, 6| are moved into the position shown in Fig. 6 by means of the lever 64 where they are in engagement with their pinions, the carriages 53, 53' are again moved downwards into their initial position. Then the slides 59, 59 are moved backwards if they were previously displaced in the upward movement of the carriages. Then the racks 5|, 6| which are connected with their pinions cause a rotation of the pinions and a corresponding displacement of the embroidery frame. By the use of the carriage .53 it is thus possible to efiect adjustment of the intermediate members, while completely freed from load and the loading of the intermediate members takes place only when the work required for displacement of the embroidery frame is efiected by the carriage or the rods 93, 94 and SI-IGO connected therewith. It should be noticed that the described operation of the carriages is of particular advantage because in the upward movement of the carriages i. e. when the weight of the carriages must be raised, only adjustment of the rods 59, 61' takes place and in the downward movement of the carriages the embroidery framework is moved, the weight of the carriages, acting as a driving medium. By the arrangement in accordance with the invention a balancing of the forces is obtained which is very valuable for the silent running of the machine.

As each of the double armed levers 51, 51 have lever arms of unequal length (compare the distance from the pivot 58 to the pivots 55 and 55 in Fig. 6) and as each of the pivots co-operates with three switch slots 54 to 54 there is obtained as is shown diagrammatically in Fig. 22 for the pivot 58 a zero position and four positions to the left and to the right of this initial position. As a consequence the slides 59, 59 in addition to the initial or zero position can assume eight diiferent positions. Figs. 19-21 will help to elucidate Fig. 22. From Fig; 19 it is clear that while the upper pivot 56 is in the switch slot 54 three different positions are possible, while the lower pivot may be in the left hand switch slot 54, then in the middle switch slot 54 and finally in the right hand switch slot 54 Fig. 20 shows three other positions when the upper pivot 56 is in the middle slot v54' of the upper switch. The remaining three positions are then clear from Fig. 21 in which the upper pivot is located in the right hand switch slot 54 of theupper switch.

In Fig. 15 is finally shown a position such as would be assumed when for example in the movement'to the left of the card cylinder 25 the plates 33 meet a solid portion of the card. In this case when the pivot 39 is moved upwards the slide 34' would strike 'a projection on the plate and thereby effect a corresponding downward displacement of the slide 34' and upwards displacement of the slide 34 By this displacement of the slides 34, 34 the T-shaped lever 31', would be swung to the right from the position shown in Fig. 6A so that the rod 5| connected therewith is displaced to'the right. The guide member 55 secured to the connecting rod 52 is moved to the right so that the guide 54 slot is free to the pivot 56. In the upward movement of the carriage 53, the pivot 56 is guided into the switch slot 54 whereby the lever 51 and the rod connected therewith is given a corresponding movement.

On the return movement of the card cylinder 25 to the right, the plates 33, 33 ifthey have been displaced are returned to their initial position. This movement is efiected by the lever IH which is pivoted at 2 to the casing A and connected with the lever I8 by the link IIII. At the upper end of the lever H I is mounted a cross bar III which is so wide that it can grip and move back into initial position all the plates.

The plates 33, 33 are so formed that by slight adjustment the embroidery design can be .reversed.

A stitch which for example is .so marked on the design card that it (see Fig. .23) can move from the zero point three parts in the direction of the -x. axis and five parts in the direction of the +11 axis must whenadesignisto bereversed lie three parts in the +1: axis andfive parts in the direction of the +11 axis. Conversely, the stitch which lies from the Zero point three parts in the direction of the +a: axis and five parts in the .direction of the y axis must be so displaced that it lies three parts in the direction of the -a: axis and five parts in the direction of the y axis.

This reversal of the embroidery design is effected by displacing the carrier 35 in which the slides 3434 are movably mounted to the left in the direction of Fig. .6 so that the slides 3434 move from the position shown in Fig. 13 to the position shown in Fig. 16. The carrier 35 is thus so displaced that the spring II3 enters the groove II4 in the carrier 35.

If in this position of the carrier 35 when the pins 32 of the plate 33'.strike a solid portion of the card in the corresponding movement of the card cylinder 25 then the plate 33' is moved from its initial position to the position shown in Fig. 17.

If now the spindles 39 are moved upwardly by the machine drive then the slides 34, 34 are no longer displaced as they were in the adjustment according to Fig. 14, but the slides 34', 34 are moved from their initial position as is shown clearly in Fig. 17. The. slides 34, 34 thus pass from the position shown in full lines into the position shown in dotted lines. The plates are so formed that in the displacement of the carrier 35 the adjustingvalues are displaced with reverse signs.

Here it may be also observed that obviously the displacement of the carrier on a reversal of the embroidery design causes no displacement for those plates which control the feeding movement of the embroidery frame inthe direction at right angles.

Finally there is indicated in Fig. 18 how-the displacement of the carrier 35 to the left acts when the plate needle 32 meets a solid portion of the card. In this case the slides 34, 34 are moved (and not the slides 34, 34 as in Fig. 15) from the full line position to the position shown in dotted lines.

In the embodiment illustrated in Figs. 24-26 in lieu of the carriage 53 carrying the switching devices 54, 54 setting members H5, H are-employed which are mounted to pivot about pivots I It on the casing :B. These setting members are each provided with a groove II'I struck on a radius which is formed on the length of the levers H8. The levers H3 engage with their pivots H9 in the'grooves In of the setting devices and are connected by the pivots I23 to the lever I2I having arms of unequal length, the pivot I22 of which is mounted on the slide I23.

The slide I23 is mounted to move longitudinally in the casing B and its function corresponds with theslide 59 of the constructionrshown in Figs. 1 to .23. On the slide-l-23 engageat I23 rack bars Si .or 6|, which as in the embodiment already described mesh with the pinions 68 or 68.

Each of the upper levers II8 is connected by a link I24 with the lever I I8 therebelow. Also, the upper levers H8 are engaged by the links I25, which are connected by a common pivot pin I23 with the end of lever I23. The actuating lever is mounted topivot about a pivot I2? on the .machine casing 13 and engages by means of a guide .roller I28 in the cam groove I29 which is provided on the cam drum 61 mounted on the spindle 34. Cams 36 and I6 are also provided for the rollers 35 and 13 of the levers 64 and II in the cam drum 6?.

On the setting members are provided in the three positions which each setting member can assume three notches I33, opposite which the locking lug I3I is disposed. The locking lugs I3I adjacent the lower setting members H5 are secured to the levers I32 so as to turn about the pivots I33, while the locking lugs I3! arranged adjacent the upper setting members H5 are arranged on the double armed levers I34. The levers I32 are connected by the links I35 with the levers I34. To the two levers I34 the pivots I36 of which are secured to the casing 13 are connected the link I31. The link I31 is connected by the pivot I38 with the double armed lever I33 which is mounted to pivot about a pivot I39 on the machine casing. The lever I38 engages by means of its roller I40 in the cam groove I II provided on the cam drum 61'.

To each setting member is connected at I42 a link I43 or I i3 which are each connected with a T-shaped lever I44, I44.

The pivots 39 of the T-shaped levers I44, I44 are as in the first embodiment (see Fig. 6) connected tolevers 46, 4I. While the links I45, I43 are connected to the T-shaped lever I44, the links IfiII, I43 are connected to the T-shaped lever I44. Each of the links I45-I48 is connected to a slide RIF-I48. The slides I45-I43' are thus so arranged that at any moment the slides I45, I45 or M'I, I48 are in one plane so that both the slides I45, I43 as also the slides I47, I48 co-operate with a pair of plates 233, 233'. The plates 233, 233 act exactly like the plates33, 33' in the first embodiment. They diiTer only as regards their recesses or projections with which the slides co-operate from those of the first embodiment. Also the plates 233, 233 are provided with plate needles 232, 232 with which the jacquard card arrangement, which the present embodiment in other respects is exactly the same and operates in the same way as in the first embodiment, co-operates.

'By the particular construction of the plates three positions are possible for the levers I44 or I44, viz: the middle position and two tilted positions which are indicated by dotted lines on the T-shaped levers I44 in Fig. 24. According as the plate needles 232, 232 enter the holes in the jacquard card or meet a solid portion, the plates 233, 233 connected with the plate needles remain in their initial position or are displaced to the left of Fig. 2 If thereupon the pivot 39 of the T-shaped lever is moved upwards by the cam disc 43, then as the plates are adjusted either displacement of the T-shaped levers towards the left or right takes place, or they remain in the middle position.

By the connecting rods I 43, I43 the corresponding setting members II5, I'I5 are adjusted with the 'T-shaped levers I44, I 43. Thereupon the lever I33 is turned by thecam MI .in the direction of the arrow indicated in Fig. 24. The levers I34, I32 are moved to such an extent that the locking lugs I3I provided thereon enter corresponding notches I 30, as the result of which the setting members H5, I I5 are held in the 'positions thus obtained by the levers I44, I44. After the setting members are held in this manner the lever I26 is moved by the cam I20 in the direction indicated by the arrow in Fig. 24, as a result of which the levers II 8 move downwards and the pins H9 move correspondingly in the cams II1. According to the adjustment of the setting members the slide I23 is thus moved or remains in its initial position. The three possibilities of ad justment of each setting member and the three switching slots 54-54 act as in the construction shown in Fig. 6, whereby the levers are given the positions shown diagrammatically in Figs. 19-22.

Obviously before the lever I26 moves, the rack vbars 6|, iii are first moved out of engagement with their pinions so that in the downward movement of the levers I I8 only the movement of the slide I23 takes place. While shortly before the lever I26 is swung back into its initial position, the rack bars SI, SI are again brought into mesh with their pinions so that the slide I23, while the levers II8'move back into their initial position, is again brought into its initial position and the movement of the embroidery frame effected by the differential gear described.

The embodiments illustrated in Figs. 27 and 28 constitute a modification of the embodiment shown in Figs. 24-26. The parts in this embodiment contained in the casing A are constructed exactly like those in the embodiment illustrated in Fig. 24 for which reason only the casing B of the last embodiment is illustrated. Also in the construction shown in Fig. 27 two sets of setting devices of the same kind are disposed in series as indicated in Fig. 28, only one set being illustrated in Fig. 27.

In the embodiment shown in Figs. 27 and 28 the link I43 shown in Fig. 24 is connected at I to the upper end of the lever I56 mounted on the casing B at I49. The link I43 shown in Fig. 24 however is connected at I5I to the lever I5I mounted at I52. The links I43, I43 lying behind the links I 43, I43 which have been omitted in order not to confuse Fig. 24, are connected to' the ends of the levers I53, I54 as is clear from Fig. 27. While the lever I 53 is connected at I56 to the lever I59 the lever I54 is connected at I5! to the lever I5I. To the lever. I53 is connected at I53 the link I55 which is connected by the pivot I55 with the setting member I56 formed as a slide. To the lever I54 is connected at I 54 the link I54 which is connected with a setting member I 56' corresponding to the setting member I 56 which, however, in order not torconfuse the drawings, has been omitted in Fig. 2'7. These setting members are mounted to move longitudinally in the guides I51 and are provided with nine grooves I58. Adjacent these setting members is mounted the driving shaft I59 which is provided with a crank pin I60. The shaft I59 like the spindle I94 is connected with the main shaft 1 of the embroidery machine. On the crank pin I60 are mounted the two connect- ,ing rods I6I and I6! which are provided at their ends with guide pins I62 or I62. The guide pins enter slots I63 which are provided on downwardly extending brackets of the rack bars I81, I81. On rotation of the shaft I59 the pins I62, I62 are reciprocated vertically in the guide slots I63. 'The pins I62,TI62' are made of sufficient length as shown in Fig. 28 that they enter the grooves I58.

By the rods I50 to I54 shown, in particular, in Fig. 27 there are provided for each setting member nine possibilities of adjustment which are illustrated diagrammatically in Figs. 29-32. From Fig. 29 it is clear how by the adjustment of the rod I 43 into the extreme left hand position in relation to the rod I43 three possibilities of adjustment are provided. The first position is indicated by a, the-second by b and the third by c.

In Fig. 30 is shown how on the adjustment of the rod I 43 into the middle position in relation to the rod I43 three positions are again possible which are indicated by d, e and J.

Finally Fig. 31 shows how on adjustment of the rod I43 into the right hand position three further positions are possible which are indicated by g, h and i.

Fig. 32 shows all nine positions diagrammatically.

I Each setting member I56, I56 is arranged adjacent a lockingslide I64, I64 which are mounted to move vertically in the casing B. On the lower ends of the locking slides are provided springs I65 which bear on the one hand against the guide and on the other against a disc I66 secured to the foot of the locking slide I64, I64.

Under the action of the springs the locking slides are pressed against cam I61 provided on the shaft I59. On the shaft I59 is mounted the cam disc I68 which is provided with cam grooves I69 and I10. In the cam groove I69 engages the roller I1I which is provided on the one arm of the bell crank lever I12 mounted at I13. To the free arm of the bell crank lever I12 is connected at I12 the link I 14 which is connected by the pivots I15 with the pawl lever I15. The pawl lever I15 is mounted to pivot at I16 and has the same function as the pawl lever H in the first described embodiment.

In the cam groove I10 engages the roller I11 which is rotatable on the one arm of the bell crank lever I18. The bell crank'lever I18 is mounted to pivot at I19 on the casing B and is connected by the link I with the bell crank lever I8I. The bell crank lever I8I which is pivoted at I82 on the machine frame is connected by the link I83 with a corresponding bell crank lever I84 which is pivoted at I85 on the machine frame. Pins I 86 are provided both on the bell crank lever I8I and on the bell crank lever I84 which pins enter slots I81 The slots I81 are provided on the rack bar I81. The rack bars are movable to and fro on the 'pins I86 and is mounted to move up and down by tilting the levers I8I, I84.

The modus operandi of the invention is as follows:

Before contact of the plates by the upward movement of the pivots 39' in the casing a, the locking slides I64 are released by the rotation of the shaft I59 and the cam I61 mounted thereon so that they leave the corresponding notches I88 provided on the setting members I 56, I 56. In the succeeding contacting of the plates the rods I50, I54 effect the adjustment of the setting members I56, I56. If for example the adjustment is so effected that the pivot I53 assumes the position indicated in Fig. 29 by c then at the same time the setting member I 56 would be so displaced that the third cam groove I56 (counting from the left of Fig. 27) is moved in front of the locking slide I64. While now the locking slides I64 are moved upwards by their cam grooves

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