US1707263A - Automatic embroidering machine - Google Patents

Automatic embroidering machine Download PDF

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Publication number
US1707263A
US1707263A US137146A US13714626A US1707263A US 1707263 A US1707263 A US 1707263A US 137146 A US137146 A US 137146A US 13714626 A US13714626 A US 13714626A US 1707263 A US1707263 A US 1707263A
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United States
Prior art keywords
lever
plates
card
adjusting
movement
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Expired - Lifetime
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US137146A
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English (en)
Inventor
Gahlert Franz Josef
Bretschneider Max
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Individual
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Individual
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C7/00—Special-purpose or automatic embroidering machines

Definitions

  • the jacquard card may be operated to bring another row of holes therein to working position after the backward oscillation from a previous stroke whilst leaving plenty of time for such movement to the card, thus permitting the use of a jacquard card with rows of holes set closely together without loss of accuracy.
  • the plates re ferred to are of already known type, set in pairs and slidable, each plate of a pair having an angle groove therein one part of which groove is horizontal and the other inclined or declined.
  • the latter part of the groove, that is the part inclined to the horizontal is, in one plate, inclined upwardly and the corresponding part, in the other plate of the pair, is declined, each groove having engaging therewith a bolt on the end of a double lever.
  • gripping means In order to relieve the back pressure of the parts of the apparatus upon the jacquard card, gripping means are provided having pawls which on the advance of a plate or of plates, descend upon engaging means and the grippers having bevelled faces, pull the plate or plates forward, after the movement of the plate or plates has been commenced by the jacquard card, the pressure on the latter being thus relieved.
  • the roll of :urd is positively unwound from the usual roll bobbin so that it forms a loose loop, the used portion of the roll being No. 137,146, and in Germany May 15, 1925.
  • Fig. 1 shows in elevation an adjusting mechanism comprising two series of levers.
  • F g. 2 is a plan view of Fig. 1.
  • Fig. 4 shows diagrammatically the ar rangement of an adjusting mechanism, the series connecting-rods of which act directly, by special adjusting levers, upon the elements which drive the frame.
  • Fig. 5 is a similar view as Fig. 4 showing a modification of the arrangement.
  • Figs. 6 and 7 show the needle plates with pattern carrier frame and comb-shaped gripper in front elevation and in plan view respectively.
  • Fig. 8 is a similar view as Fig. 6 in which the needle plates have been advanced but are still in the initial dead point position.
  • Fig. 9 shows the position of the plates just prior to the beginning of the working stroke, the pattern card being relieved.
  • Fig. 10 shows in a diagrammatical plan view the improved feeding mechanism for the jacquard card of an automatic embroiderer.
  • the adjusting movement of the embroidering frame is derived from the jacquard card 1 by the jacquard needles 4, 5 of the plates 2, 3 which are selected in a manner known per se so that the perforated points of the jacquard card leave the needles in their initial position, whilst the full or not perforated points of the card push the jacquard needles forward.
  • the plates 2, 3 of each of the pairs of plates shiftably mounted in the casing 53 have angle grooves 6, 7 directed in opposite directions with which the control bolts 8, 9, 10, 11 of the elbow levers 12, 13, 14-, 15 engage.
  • the elbow levers are pivotably mounted on axle 1 6,
  • Each series comprises a pair of elbow levers with arms 12, 13 or 14:, 15 extending in opposite directions.
  • a link 17, 18 or 19,20 is hingedly connected by means of a hinge pin 21, or 23, 24.
  • a two-armed adjusting lever 26 is hinged by means of a hinge pin 27, 28 or 29, 30 said adjusting levers being again hinged at their pivot points 31, or 32 to a connecting rod 33 or 34: shiftably mounted in the casing 53, one con necting rod for each series.
  • the control bolt 8 is adjusted by the curved groove 6 in upward direction through a portion of an arc,so that the upper portion of the adjustingsystem oscillates, as indicated in dashlines in Fig. 1.
  • the movement, which by the link 17 is transmitted upon the two-armed adjusting lever 25, is transmitted at the ratio 1 x 3 in accordance with the ratio of lever arms of difi'erent len ths. upon the connecting rod 33 pivotably mounted on the pivot point 31 of the adjusting lever, so that in this manner, according tot-he oscillation of the one or other end of the adjusting lever, four different shifting movements in the one or other direction are obtained.
  • Fig. 3 shows the different positions of ill I) adjusting lever 25 diagrammatically. These different positions in the one direction are designated by a, b, c, d, and in the other d1- rection by a, b, c, d.
  • the connecting rod 33 is shiftedof the amplitude of movement at or a, i. e. through 1/et of the adjusting amplitude. Adjusting amplitude means the extent of stroke of the pairs of plates with elbow lever arms 12, 130i equal length.
  • the adjusting amplitude amounts to a "traction according to the proportion o1 the lengths of the lever arms. It inversely the just-ing lever 25 is held fast in the hinge 2"? andoscillated in the hinge 28 in the one or Y other dlrection, the connectmg rod 33 1S shitted through the movement amplitude c or c, i. e. through 3/4 of the adjusting amplitude. If, however, the adjusting lever 25 is made to oscillate in the hinge 27 in the one direction and in the hinge 28 in the opposite direction, the difference of the two adjusting movements 1) or b, i. e. 2/4 of the adjusting amplitude, is transmitted upon the connectingrod. If the adjusting lever 25 is made to oscillate at both ends 27, 28 in the same direction the sum of these two movement amplitudes, the fourfold movement amplitude (l or d, or the entire adjusting amplitude is transmitted upon the connecting rod.
  • the connecting rods 33 or 34 bear toothed slides 35 or 36 which gear with gear wheels 38 or 39 keyed on a shaft 37, said gear wheels being coupled, in a manner known per se, to a differential gear not shown having a transmission 1 X 9, so that in this manner the continuation of the geometrical progression is obtained and the stitch-lengths which are thus formed are transmitted upon the adjusting elements for the frames.
  • the toothed slides 35 or 36 are engaged and disengaged by the connecting rod 40.
  • the connecting rod may be hingedly connected to the middle of the adjusting le- S'LIS it' the two pairs of elbow levers of one series, or the curved grooves of the two pairs of plates, are stepped in the ratio 1 X 3 whereby the ends of the adjusting levers are made to oscillate through distances which correspond to the ratio of transmission mentioned.
  • the COIIS'iTl'tlCiJlVG arrangement of the invention as regards arrangements oi the two st es of an ad usting mechanism in the spacers ol sizibstantial importance.
  • the coimecting' rods r 34 are arranged the one obliquely above the other, whilst in Fig.
  • lithe connecting rods or 34 of the great and little series of the one adjusting mechanism are arranged in one and the same plane and bent at such an angle, that a sulliciently long adjusting lever 43 obtained owing to the greater distance between the pivot points 4-5, 46.
  • the connecting rods oi the two adjusting mechanisms are preferably arranged the one above the other in the machine casing.
  • the automatic embroidering machine may be used as large size automatic embroid erer for ntiul't-iple needle embroidering machines.
  • an auxiliary adjusting mechanism is provided as third series which co-operates with the great adjusting mechanism, in a manner known per so, by a separate difl'er ential gear.
  • the ratio of transmission of the auxiliary dillerential gear will he preterably selected so that the reading of the stitch lengths on the card is considerably tacilit-ated. The last that, in multiple needle embroideringmachines, the jacquard card must be relieved of the pressure 01 the stitch grate makes it necessary to provide for this purpose special guiding devices ⁇ or the needle plates.
  • This special device for relieving the jacquard card shown in Figs. 6 to 9 inclusive is constructed as tollows Between the two resilient perforated plates 54, 55 (Figs. 6 and 7) ol' the pattern carrier frame 56 a pattern card 1 is guided which is fed. in a manner known perse, by means of feeding pins.
  • the pattern carrier frame 56 with the abutment bridge 5? is mounted in the housing 53 so that it can be shifted in longitudinal direction and it is moved towards the needle plates (arrow ct Fig. 6) by means oi: an eccentric not shown in the drawing.
  • a transverse bar 58 ot the machine frame serves as stop for the needle plates if the same are returned into the initial position.
  • the pattern carrier frame 56 has an extension 59 on which a lever (30 is ph otably mounted which. carries at one ol i 1 ends a stud 61 guided in a curved groove (32 oi the machine frame 53.
  • the lever has at its other end a, combshaped gripper 3 the gripping pawls 64 0t which. engage l ahind the lateral stud 65 of the working plates 2 or which have already-, been advanced.
  • the plates 2 and 3 arranged in pairs hav jacquard needles l, 5 adapted to be adj usted by the pattern card 1.
  • These control bolts 66 are held in the initial or middle position, at the beginning of the curved grooves, by the lengthened initial dead point position which is due to the i'act that the two needle plates o't each pair have each an extension (59, 70.
  • 3 locking levers 71 are loosely mounted on lit;-
  • Each of these levers 71 has at its end a lateral arm 72 bent at right angles and engaging, as locking bolt, with the curved grooves 6 or? of the needle plates so that it is lifted or lowered at-the shifting of one of the plates of a pair of plates by the curved groove of said plate.
  • the gripping lever pivotably mounted on the pattern carrier frame slides, in accordance with the movement of the pattern carrier frame,-with its stud 61 also inthe curved groove 62 of the machine frame (Fig. 8),at first in the horizontal portion, then in an ascending portion and thenvagain in 'a horizontal portion of the -Th'e gripper curve 62 possesses, therefore, also an initiaL and an enddeadpoint position in order to limit the movement of the gripper lever atthe beginning and at the end or to securely hold this lever in these two positions.
  • the gripper lever 60 pivotably mounted on the pattern carrier frame, is oscillated so that the pawls 6410f the gripper comb 63 grip behind the lateral studs of the advanced working plates.
  • these pawls 64 are pointed at the. front end and get thicker towards the rear end, the needle plates are further advanced by these bevelled surfaces 65 and moved away from the pattern card 1 9).
  • the bolt 61 of the gripper lever 60 slides at this occasion in the curved groove 62 back from the upper into the lower deadpoint position, whereby the gripper comb 63 is raised and its pawls release the lateral studs 65 of the plates.
  • the abutment bridge 57 of the pattern carrier frame draws the needle plates back into their initial position up to the stationary transverse bar 58 so that said plates can again be selected by the jacquard card.
  • Fig. 10 the arrangement of the pattern taking mechanism with regard to the card feeding mechanism is shown.
  • the jacquard card J is wound on a bobbin 7:), the axle 76 of said bobbin being loosely journaled in a bobbin frame not shown.
  • a feed roll 77 on the shaft 78 is rotated from the shaft of the sewing machine or from the main shaft of the automatic embroidering machine-by an articulated chain, not shown in the drawing.
  • the feed roll 77 has latorally projecting catches 79 designed to engage with the feed-holes in the jacquard card.
  • Counter pressure feeding rollers 80, 81 for the coming in portion of the jacquard card and counter pressure pulling off rolls 82, 83 for the running off portion of the jacquard card serve for pressing said card onto the feed roll.
  • the counter pressure rolls 80, 81 or 82, 88 are loosely mounted on axles 84-, 85 or 86, 87 fixed in the ends of oscillating levers 88, 89 or 90, 31 oscillatably mounted iii pairs on axles 92 or 93 which are fixed in the bobbin frame.
  • the levers 88, 89 or 90, 91 of each pair of lovers are connected with one another by pull springs 94, 95 so that the counter pressure rolls 80, 81 or 82. 83 are elastically pressed onto the feed roll.
  • the counter pressure rolls have at each side feed holes with which the catches 7 9 of the feed roll engage.
  • a winding up mechanism for winding up the jacquard card a winding up mechanism is provided, .which consists essentially in that the unwinding jacquard card is wound up from the feed roll upon the winding up bobbin 96 by means of a yieldable belt.
  • the winding up bobbin 96 iskeyed on a shaft 97 journalled in the bobbin frame.
  • a pulley 98, 99 is arranged which are connected with one another by an elastic belt 100.
  • a spring element for instance a pull spring 101 is inserted in the belt 100 so that it can easily slip on the two pulleys.
  • the jacquard card forms a loose loop 102 which.
  • This mechanism consists essentially of a feed frame 103 shittably mounted in bearings 10 i and operated by an ascending and descending feed lever, not shown in the drawing.
  • the feed frame 103 has on its two edges feed pins 105 adapted to engage with the feed holes of the jacquard card and designed to intermittently engage, at the as cending and descending, with two vertical slots of the plates 106, 10? which guide the pattern card d (positions I and II), whercby, in combination with the forward and backward oscillation of said guide plates, the intermittent feeding of the pattern card loop 102 is effected by the pattern carrier frame 108, which is horizontally guided in the housing or the automatic apparatus.
  • the two guide plates 106, 107 for the pattern card are pressed the one against the other by a feeble spring, so that the jacquard card is slightly clamped between these plates.
  • the jacquard card d wound up on the bobas loli bin 75 is wound oil said bobbin by the traction exerted by the feed roll 77 and passes through between the two feed-counterpros sure rolls 80, 81 over the upper portion of the feed roll 77 to form their a loose loop 102 to the middle portion of which the well known oscillating movement for the adjusting of the jacquard needles in accordance with the pattern is communicated by the guide plates 106, 107, the jacquard card being fed intermittently by the feed pins 105 of the feed frame 103 which executes a reciprocating movement in vertical direction.
  • the loop shaped portion 102 of the jacquard card is enlarged (position 1), Whilst at the backward oscillating it is compressed again (position II).
  • the woundup end of the loop 102 is conducted by the winding oil counter pressure rolls 82, 83 over the lower portion of the feed roll and wound up upon the winding up roll 96. This is carried out in such a manner that to this roll 96 the move ment is communicated by the yieldable belt 100 at such a ratio of transmission that this roll, at the beginning of the winding up, winds up the tree portion of the card.
  • the yieldable belt 100 slips on the pulleys 9 8, 99 so that the pull exerted upon the jacquard card is reduced and the feed holes of the card are preserved.
  • the circumstance is important that the pattern card is wound oil in uniform progression and similarly wound up.
  • the feed roll '2"? may have a cover of hard rubber so that the teed pins 79 oi the feed roll can be omitted.
  • the pressure 01' the counter pressure rolls will preferably be increased by selooting powerful springs 95, 9 1 so that the jacquard card is pulled along by the strong friction of the counter pressure rolls so that no stress is exerted upon the feed holes of the card.
  • the loose loop 102 of the jacquard card may be wider 1n order that little irregularities in the unwinding and winding up of the card are compensated by the greater width of the loop.
  • an automatic embroider-lug machine means for producing a movement of variable amplitude from unvariable driving movements, comprising; in combination pairs of shiftable needle plates each pair composed. oi two .eedle plates, oscillatable elbow levers one to 1' each plate oscillated in the one or other direction by said shittable plates, lever-parallelograms one for each needle plate and formed by the other arm of said elbow lever by a lever downwardly extending from the pivot point 01 said elbow lever by two links and by a lever parallel to the upper tl'l'll of said elbow lever and to said lever in alignment with said arm, connecting rods one for each plate hingedly connected to said parallel levers, and means for transmitting the movements of said connectinp rods upon said embroidering machine so that four movement amplitudes oi? the arithmetic progression are obtained.
  • an automatic embroidering machine a mechanism for producing movement of variable amplitude from unvariable driving movements, comprising in combination pairs of shiftable needle plates each pair composed of two needle plates, oscillatable elbow levers one for each plate oscillated in the one or other direction by said shiitable plates, lever parallelogranis one for each needle plate and formed by the other arm ot said elbow lever by a lever downwardly extending from the pivot point oft said elbow lever by two links and by a lever parallel to the upper arm of said elbow lever and to said lever in alignment with said arm, connecting rods one for each plate hingedly connected to said parallel levers, and means for transmitting themovcments of said connecting rods upon said our broidering machine so that four movement amplitudes of the arithmetic progression are obtained, and means for adding in a desired ratio of transmission the movementamplitildes of said connecting rods of every two series and for transmitting these added movements as final movement upon the embroidering frame. 7
  • an automatic embroidering machine in which the movement of unvariable amplitude is produced by pairs -of needle plates which are alternately shifted from the initial position by the action of a pattern card, a pattern carrier frame in which said pattern card is guided, an extension of said carrier frame, a pull lever hingcdly mounted on said extension, a comb shaped gripper on one end ofsaid lever and comprising one gripper for each needle plate each gripper having a bevelled end face, a transverse stud on each needle plate and situated in the range of the corresliionding gripper, a pin at the other end of said pull lever, and an extension of the machine frame having a groove with which said pin engages so that at the shifting of said needle plates when the same are in the dead point position said pull lever is lowered over said transverse studs of said needle plates and pulls said needle plates away from said pattern card.
  • pairs of needle plates each pair composed of two plates each plate having a curved groove the grooves of the two plates of one pair extending in opposite directions, a safety lever rotatably mounted near each plate, and having its free end bent at right angles and engaging with said groove of: the corresponding needle-plate, an adjusting lever for each needle plate, a circular locking face on each needle plate and designed to hold said bent end of the corresponding safety lever when said adjusting lever of the other plate is being raised.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US137146A 1925-05-15 1926-09-22 Automatic embroidering machine Expired - Lifetime US1707263A (en)

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FR (1) FR627497A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926703A (en) * 1960-03-01 Controlling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926703A (en) * 1960-03-01 Controlling device

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FR627497A (fr) 1927-10-05

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