US3066623A - Seam formation indicator apparatus for sewing machines - Google Patents

Seam formation indicator apparatus for sewing machines Download PDF

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Publication number
US3066623A
US3066623A US800241A US80024159A US3066623A US 3066623 A US3066623 A US 3066623A US 800241 A US800241 A US 800241A US 80024159 A US80024159 A US 80024159A US 3066623 A US3066623 A US 3066623A
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United States
Prior art keywords
indicating
seam
stitch
fingers
seam formation
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Expired - Lifetime
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US800241A
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English (en)
Inventor
Reeber Rudolf
Wenz Herbert
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GM Pfaff AG
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GM Pfaff AG
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • the present invention relates to apparatus for indicating seam formation adjustments on sewing machines fitted with an ornamental seam device.
  • connections with various control means can be established by means of adjusting knobs, changeover switches or the like setting means whereby the positions of mechanisms for determining a predetermined seam formation are changed in a periodically repeating cycle. The appropriate seam formation is automatically indicated.
  • the said devices determining the seam formation on so-called indirectly controlled automatic machines are the mechanisms for changing the stitch position, the stitch width and, if preferred, the material feed.
  • On so-called directly controlled automatic machines these devices are the needle bar oscillator with its movement mechanism and, if preferred, a device for adjusting the material feed.
  • a plurality of scam formations may be sewn by a machine in accordance with the combinations between the various actuated control means of the individual devices.
  • the object of the present invention is to make it possible to indicate a large number of scam formations with the smallest possible number of mechanisms for establishing the connections between the devices to be controlled and the control means. This is achieved according to the invention by an arrangement of multiple indicating means such that, by the co-operation thereof, any desired seam formation is indicated on the seam forming scale.
  • indicating means each in operative engagement with the change-over switch, or other setting means are provided and together indicate the seam formation sewn according to the adjustments of the setting means so that they point, on a field of relatively intersecting seam-forming groups, to the point of intersection of all those seam-forming groups to which the sewn seam formation belongs, in that each of these contains all the seam formations capable of being sewn in any given position of the setting means.
  • FIGURE 1 shows one embodiment in plan view of an arm of a sewing machine with the ornamental seam device and the cover removed, non-essential parts being omitted for better understanding of the invention.
  • FIGURE 2 is a section on the line 11-11 of FIGURE
  • FIGURE 3 is a development of the drum or roller of FIGURES l and 2 which carries the seam formations,
  • FIGURE 4 is a development of an indicating cylinder surrounding the drum or roller of FIGURES 1-3.
  • FIGURE 5 illustrates in plan view a second embodiment in a manner similar to FIGURE 1.
  • FIGURE 6 is a section on the line Vl-VI of FIG- URE 5,
  • FIGURE 7 is a view on the line VII--VII of FIG- URE 6.
  • FlGURE 8 shows a development of the drum or roller of FIGURES 57 which carry the seam formations, but illustrating the group characteristics of the seam formations instead of the seam formations themselves.
  • FIGURE 9 is a development of the indicating cylinder surrounding the roller in FIGURES 5-8.
  • FIGURE 10 illustrates a further embodiment showing a development of the drum or roller bearing the seam formations and on which group characteristics of the seam formation are shown.
  • a carrier plate 2 is mounted on an arm 1 of a sewing machine by means of screws 3. lournalled on the carrier plate 2 is a vertical shaft 4' on which six pattern cam discs 5 are mounted one above the other. Only three of these are shown in the drawing.
  • the shaft 4 is driven by the arm shaft 6 of the machine by way of pinion gears 6a and 6!; or the like.
  • Pairs of rocking levers 8, 8a and 10, 10a are rotatably mounted on both sides of the pattern cam disc assembly on pins 12 and 13 secured to the carrier plate 2 and are rigidly connected by spindles 14 and 15 so that they each form a transmission rocker arm 9 and. If respectively.
  • draw bars 16 and 17 they are mechanically connected in any desired manner (not shown) with the setting members of the devices for changing the stitch width and stitch length which may also be constructed in any desired manner and are therefore not shown.
  • Springs 7 and 7a are connected to bars 16 and 17, respectively, so that the transmission rocker arms and 11 are normally urged towards the shaft 4 of the pattern cam disc assembly so far as the maximum deflection of the said devices permits.
  • Six scanning fingers I8 and 19 are journalled to swing freely on the spindles 14 and 15 respectively and on bot sides of each of the six pattern cam discs is located, on the same level therewith, one each of the six scanning fingers 18 and 19 respectively.
  • the hubs 22 and 23 are rigidly connected to perpendicular spindles or shafts 24 and 25, respectively which in turn are journalled in the supporting plate 2 and are each connected to a knurled knob 26 and 27 respectively projecting beyond the arm 1.
  • a locking device (not shown) locks each of the rotary knobs 26 and :27 and conse quently, the hubs 22 and 23 in the position shown in FIGURE 1 and in all positions which differ from the position shown in FIGURE 1 by a whole multiple of the angle between adjacent supporting fingers 20 and 21 respectively.
  • These are disposed in groups of six opposite each other at spaces of of 360 so that an empty place in an otherwise uniform series of supporting fingers 2d and 21 is provided on the hubs 22 and 23 respectively.
  • the turning of the knob 26 or 27 which operate as change-over switches or the like setting means from one locking position to another has the result that the supporting finger 29 or 21, which at any instant is in abutment with the scanning fingers 18 and 19 associated therewith, is angularly displaced out of contact therewith and another supporting finger is brought into contact with the scanning finger associated therewith.
  • the supporting finger 29 or 21 which at any instant is in abutment with the scanning fingers 18 and 19 associated therewith, is angularly displaced out of contact therewith and another supporting finger is brought into contact with the scanning finger associated therewith.
  • any scanning finger 18, 19 has the result that the latter, on the swinging out of its scanning end 28 or 29 under the influence of the pattern cam disc associated therewith, cannot swing unimpeded about the Spindle 14 or 15. Instead it Slides on a surface 30 or 31, as the case may be, on the supporting finger 26 or 21 associated therewith and adjusts, by way of the transmission rocker arm 9 or 11, the stitch width or the stitch position, synchronously with the shape of the curve of the pattern cam disc associated therewith.
  • the other pattern cam discs are inoperative, since the deflections of the unsupported scanning fingers 18 or 19 associated therewith are etfected merely about the spindle 14 or 15 without reacting on the transmission rocker arm 9 or 11. Therefore only the pattern cam disc, the scanning finger 18 or 19 of which co-operates with the supporting finger 20 or 21, is operative.
  • shafts 36, 37 are respectively journalled to rotate but are prevented from axial displacement. Both shafts 36 and 37 extend into bore 38 of a drum or roller 39, but although the shaft 36 is non-rotatably connected with the roller 39 by means of a set screw 41), the shaft 37 and the roller 39 may turn relatively to each other. On the other hand, the shaft 37 is non-rotatably connected by means of a set screw 41 to a transparent indicating cylinder 42 surrounding the roller 31 at a small distance therefrom.
  • a helical gear wheel 44 mounted on the shaft 36 is a helical gear wheel 44 while a similar helical gear 46 is mounted on the shaft 37, and is keyed thereto by a set screw 45.
  • the gears 44, 46 engage respectively with a helical gear wheel 47 on the shaft 24 and a helical gear wheel 48 on the shaft 25. In this manner angular displacement of the knobs 26 and 27, apart from the selection of a pattern cam disc already described above, eifects rotation of the shafts 36 and 37 through the same angle of displacement of the knobs 26, 27 since the helical gear wheel transmissions 44-47 and 4648 have the ratio 1:1, in each case.
  • the stitch forming groups l -l form together a number of stitch-forming series which traverse the series of the group b --b
  • the series of the group b b extend parallel to the axis of the roller 39 and to an indicator window 49 in the cover 5d of the machine casing.
  • the transparent indicating cylinder 42 which can be turned by the knob 27 acting as a change-over switch, and a development of which is shown in FIGURE 4, is provided with diagonal indicating marks 51, each of which is associated with the stitch-forming group I and when it appears under the indicating window 49 in the cover 56 the seam formation of the associated group I capable of being sewn is indicated when the knob 27 is in this position of adjustment.
  • the stitch position adjusting device is simultaneously adjusted to the appropriate automatic control cycle.
  • the indicatin window 49 in the cover 56 forms together with the rotatable roller 39 an indicating means, the rotatable indicating cylinder 42. forms another indicating means, both of which point to the intersection point of the seam formation group b and I with which the sewn seam formation is associated.
  • the seam forming groups [1 and l each correspond to the position of the knobs 26 and 27 in which, owing to the empty place in the otherwise uniform series of supporting fingers 20 or 21, the stitch width and stitch position adjusting device is free for hand adjustment. If both devices are available for hand adjustment the field at the point of intersecting b and l is indicated by the word off which indicates to the operator the switched-off position of the entire automatic control device.
  • FIGURES 5-9 is a variation of that in FIGURES 1-4 Where the automatic control is provided by three devices on the sewing machine which influence the seam formation.
  • the basic construction corresponds to that shown in FIGURES l and 2, and for this reason is not dealt with hereinafter in greater detail as far as the identical parts are concerned.
  • the knob 127 connected to the shaft 125 accordingly has five locking positions (four for the working posi-' tions of the four supporting fingers 121 and one for the empty position on the hub 123). Accordingly the indicating cylinder 43 driven from the shaft 125 by way of the helical gear wheels 148 and 146 has only five diagonal indicating marks 151 (FIGURE 9).
  • the stitch position adjusting device controlled by the transmission rocker arm 1-11 and the draw bar 117 can therefore be adjusted only to four different automatically controlled pattern discs orwhen the control is switched oif-by hand to a fixed value.
  • a roller 157 is mounted to rotate loosely on the shaft 125.
  • the roller 157 carries two supporting fingers 153 and an operating arm 159 which is connected by way of a link 160 to a switch lever 161.
  • the latter is pivotably journalled about a spindle 162 on the supporting plate 162 and engages by means of a locking device (not shown) in three positions, one of which is indicated in full lines in FIGURE 5 while the two others are shown in chain dotted lines.
  • a locking device not shown
  • a slide 164 Journalled on the inside cover 150, below the indicating window 149, is a slide 164, which is constructed in the manner of a comb with five teeth or pointers 163, the slide having slots 166 in which pins 165 of the cover 150 engage.
  • the switch lever 161 engages in a recess 167 of the slide 164 and during its displacement into any of its three operative positions, it displaces the slide into three corresponding indicating positions and the pointer 163 into three adjacent positions registering with a window 151 in the cylinder 142.
  • the indication of the group t is effected, if neither of the two supporting fingers 158 is in the operative position, i.e. when the device for the changing of the material feed is free for hand adjustment, which is when the automatic feed mechanism is switched off.
  • the groups t and t contain the seam formations which can each be sewn in any given cycle of the automatic feed control mechanism.
  • FIGURE 10 shows the arrangement of the stitch forming groups on the development of the roller 239 in accordance with the third embodiment of the invention.
  • the mechanical construction of the roller corresponds substantially to that in FIGURES 1-3, and is therefore not shown.
  • the difference lies solely in the feature that the transmission rocker arm 9 is replaced by two transmission rocker arms one having four and the other two scanner fingers (similarly to the transmission rocker arms 11 and 153 of the second embodiment).
  • the six supporting fingers for the total of six scanning fingers of these two transmission rocker arms replacing the one are rigidly connected to a single shaft and can thus be actuated by a single knob similar to the knob 26 of the first embodiment.
  • the arrangement according to FIGURE 10 thus represents a combination of the first and second embodiments since, as in the first embodiment it is only necessary to operate two change-over switches in the form of the two knobs and in the second embodiment the material feed, in addition to the stitch position and stitch width, can also be controlled, viz. from the transmission rocker arm by the two scanner fingers, while the rocker arm with the four scanner fingers serves to control the stitch width.
  • FIGURE 10 an arrangement of the stitch forming groups is obtained as shown in FIGURE 10, the stitch forming group b containing for example all the stitch formations in whose field, according to FIGURE 10, the sign is contained.
  • the group h is shown for example shaded in FIGURE 10 for greater clarity.
  • Indicating means for a zig-zag sewing machine of the type comprising a plurality of different stitch guiding means adapted in combination to selectively produce different ornamental patterns and setting means for said guiding means including changeover switches or the like, said indicating means including a plurality of indicating devices each operatively connected with one of said setting means and adapted to be moved thereby in unison with the particular guiding means associated therewith, markings on one said indicating device and movable therewith relative to another of said indicating devices, said other indicating device having markers adapted to register with and expose said markings one at a time to reflect the symbol for the pattern setting obtained by cooperation of two said guiding means to which said indicating devices are connected, said devices being in the form of drums arranged one inside the other, said markings being arranged in seam formation groups circumferentially of one said drum and said markers being in the form of windows disposed in steps and longitudinally of the other said drum.
  • Indicating means for a zig-zag sewing machine of the type comprising a plurality of different stitch guiding means adapted in combination to selectively produce different ornamental patterns and setting means for said guiding means including changeover switches or the like, said indicating means including a plurality of indicating devices each operatively connected with one of said setting means and adapted to be moved thereby in unison with the particular guiding means associated therewith, markings on one said indicating device and movable therewith relative to another of said indicating devices, said other indicating device having markers adapted to register with and expose said markings one at a time to reflect the symbol for the pattern setting obtained by cooperation of two said guiding means to which said indicating devices are connected, said devices being in the form of drums arranged one inside the other, said markings being arranged in seam formation groups circumferentially of one said drum and said markers being in the form of windows disposed in steps and longitudinally of the other said drum, and an indicating window common to coinciding positions of said markings and said markers, and said drums being
  • Indicating means for a zig-zag sewing machine of the type comprising a plurality of different stitch guiding means adapted in combination to selectively produce different ornamental patterns and setting means for said guiding means including changeover switches or the like, said indicating means including a plurality of indicating devices each operatively connected with one of said setting means and adapted to be moved thereby in unison with the particular guiding means associated therewith, markings on one said indicating device and movable therewith relative to another of said indicating devices, said other indicating device having markers adapted to register with and expose said markings one at a time to reflect the symbol for the pattern setting obtained by cooperation of two said guiding means to which said indicating devices are connected, said devices being in the form of drums arranged one inside the other, said markings being arranged in seam formation groups circumferentially of one said drum and said markers being in the form of windows disposed in steps and longitudinally of the other said 7 drum, each said setting means including a shaft and a plurality of setting fingers spaced equally around said shaft with
  • Indicating means for a zig-zag sewing machine of the type comprising a plurality of difierent stitch guiding means adapted in combination to selectively produce different ornamental patterns and setting means for said guiding means including changeover switches or the like, said indicating means including a plurality of indicating devices each operatively connected with one of said setting means and adapted to be moved thereby in unison with the particular guiding means associated therewith, markings on one said indicating device and movable therewith relative to another of said indicating devices, said other indicating device having markers adapted to register with and expose said markings one at a time to reflect the symbol for the pattern setting obtained by cooperation of two said guiding means to which said indicating devices are connected, said devices being in the form of drums arranged one inside the other, said markings being arranged in seam formation groups circumferentially of one said drum and said markers being in the form of Windows disposed in steps and longitudinally of the other said drum, said guiding means including stitch location, stitch width and one other stitch formation control mean and said markings

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US800241A 1958-03-19 1959-03-18 Seam formation indicator apparatus for sewing machines Expired - Lifetime US3066623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP20349A DE1077039B (de) 1958-03-19 1958-03-19 Das Nahtbild anzeigende Vorrichtung an Naehmaschinen mit Ziernahteinrichtung

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US3066623A true US3066623A (en) 1962-12-04

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US800241A Expired - Lifetime US3066623A (en) 1958-03-19 1959-03-18 Seam formation indicator apparatus for sewing machines

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US (1) US3066623A (de)
CH (1) CH370947A (de)
DE (1) DE1077039B (de)
FR (1) FR1222039A (de)
GB (1) GB906662A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191559A (en) * 1963-04-29 1965-06-29 Singer Co Zigzag mechanism for sewing machines
US4188895A (en) * 1978-12-21 1980-02-19 The Singer Company Needle bight control mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL136919C (de) * 1964-03-17

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2069921A (en) * 1934-02-08 1937-02-09 Murray Colour Controls Ltd Machine tool for performing operations on metal or other substances
US2584360A (en) * 1949-01-25 1952-02-05 Springfield Machine Tool Co Indicating and setting mechanism for machine tools
FR1145737A (fr) * 1955-03-05 1957-10-29 Turissa Nahmaschinen Fabrik Ag Machine à coudre avec dispositif à zig-zag
US2862468A (en) * 1954-11-29 1958-12-02 Singer Mfg Co Ornamental stitch sewing machines
US2929350A (en) * 1956-12-15 1960-03-22 Boehringer Gmbh Geb Speed indicator for speed change transmission, particularly of tool machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2069921A (en) * 1934-02-08 1937-02-09 Murray Colour Controls Ltd Machine tool for performing operations on metal or other substances
US2584360A (en) * 1949-01-25 1952-02-05 Springfield Machine Tool Co Indicating and setting mechanism for machine tools
US2862468A (en) * 1954-11-29 1958-12-02 Singer Mfg Co Ornamental stitch sewing machines
FR1145737A (fr) * 1955-03-05 1957-10-29 Turissa Nahmaschinen Fabrik Ag Machine à coudre avec dispositif à zig-zag
US2929350A (en) * 1956-12-15 1960-03-22 Boehringer Gmbh Geb Speed indicator for speed change transmission, particularly of tool machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191559A (en) * 1963-04-29 1965-06-29 Singer Co Zigzag mechanism for sewing machines
US4188895A (en) * 1978-12-21 1980-02-19 The Singer Company Needle bight control mechanism

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Publication number Publication date
FR1222039A (fr) 1960-06-07
DE1077039B (de) 1960-03-03
CH370947A (de) 1963-07-31
GB906662A (en) 1962-09-26

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