US2579248A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
US2579248A
US2579248A US722814A US72281447A US2579248A US 2579248 A US2579248 A US 2579248A US 722814 A US722814 A US 722814A US 72281447 A US72281447 A US 72281447A US 2579248 A US2579248 A US 2579248A
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US
United States
Prior art keywords
bail
looper shaft
arm
needle bar
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US722814A
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English (en)
Inventor
Austlid Arnljot
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Individual
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Individual
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Publication date
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Publication of US2579248A publication Critical patent/US2579248A/en
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers

Definitions

  • This invention relates to sewing machines adapted for making zig-zag-seams.
  • the machine in question is of the type in which the needle bar and the looper shaft thereof are interconnected by a displaceable bail or the like adapted to be reciprocated in the longitudinal direction of the machine, thus transferring the same movements to the needle bar and to the looper shaft, whereby zigzag-seams may be made.
  • Another object is to provide a simple but effective driving arrangement for said bail, which arrangement is adjustable in a simple manner, so as to set the bail for zigzag-seams of different widths or for usual straight seam if desired.
  • Figure 1 is a side View of a sewing machine according to the invention, part of the front being broken away, to show certain features of the mechanism.
  • Figure 2 is an end view of the same, also with a part broken away.
  • Figure 3 shows, on a larger scale, a detail of the mechanism.
  • the sewing machine body consists of the arm I with head and supporting standard, and of the base plate 2 of channel-formed section. Withinthe base plate is journalled a looper shaft d, driven by a motor or in other suitable manner, and carrying a looper 5, which is located beneath the needle bar 3 and 4cooperates with the needle.
  • a looper shaft d driven by a motor or in other suitable manner, and carrying a looper 5, which is located beneath the needle bar 3 and 4cooperates with the needle.
  • bail E- Intercoupling of needle bar and looper shaft is obtained by means of a bail E-, reciprocally housed in the machine arm i. At one end of said bail is directly journalled the needle bar 3, and the other end of the bail directly carries the looper shaft 5, which is rotatable but not displaceable therein. More specifically, the bail 6 has an enlarged end portion 6 in which the needle bar 3 is slidably mounted for vertical movement.
  • the drive means for reciprocating the needle bar vertically is omitted as superfluous, being understood in the art, and forming no actual part of the invention.
  • the downwardly projecting portion 6" of bail 6 may be provided with a hole in which looper shaft 4 is rotatably mounted, thus the bail and looper shaft are movably connected together and associated.
  • the bail portion 5" is located between two shoulders or flanges 2S fixed on the looper shaft.
  • the bail 6 receives its reciprocating movement from a crank 8 on a shaft I rotated by the machines driving mechanism.
  • the latter includes the gear 25 which meshes with and is driven by pinion 2t on the end of looper shaft 4.
  • the length of pinion 2S is, of course selected to be sufficient to allow the pinion to slide along in parallelism to the axis of gear 25 during longitudinal displacement of looper shaft 4.
  • the rotor of the driving motor 21 is axially movable a short distance corresponding to the eX- tent of the axial movement of the mentioned looper shaft which is secured to the rotor.
  • 'I'he connecting rod 9 of the crank is pivotally attached to an arm II, between the ends thereof.
  • said arm Il is by means of a pin I2 pivoted on the vertical part of the bail 6, and the other end of arm II carries a follower roller I3, engaged in a cam groove I4 provided in a guide member I5', which for instance may be cylindrical.
  • This guide member I5 is secured to a shaft I5, which may be adjusted into different angular positions by means of an arm I1, whereby the groove I4 may be set in different angular positions.
  • roller I3 When the crank 8 rotates the follower roller I3 is displaced in and guided by the cam groove I4, and if the latter is set in an oblique or sloping position, for instance as shown in Figure 1, roller I3 must reciprocate a little in horizontal direction, arm I I simultaneously being raised and lowered, swinging on its pivot I2. This reciprocating movement of roller I3 is, through arm I I and pivot I2, transferred to the bail 6, which latter thereby causes the needle bar and the looper shaft to reciprocate accordingly.
  • the guide member I5 with groove I4 may be set in any desired angular position, thus adjusting the extent of the reciprocating movement and thereby the width of the zigzag-seam.
  • shaft IG is eccentrically journalled in a sleeve I8, which latter is rotatably supported in the front material of the machine body and adapted to be set in different angular positions by means of an arm ZIJ.
  • sleeve I 8 causes shifting of shaft I6 and thus also of guide member I5 towards the left or towards the right, and such shifting is, through arm I'I and bail 6, transferred to the needle bar and to the looper shaft.
  • Figure 3 shows a section through the guide member I5 with groove I4 and the roller I3, on a larger scale.
  • the fabric mover or feeder 2I is driven from a shaft 22.
  • Said shaft carries two eccentric portions 23 and 24 respectively, which are coupled to the fabric mover by means of arms, so
  • the fabric mover receives a vertical and also a horizontal reciprocating movement.
  • Control of the stitch-length and also reversion of the direction of movement of the fabric is effected by means of a controlling arm, in a manner known per se.
  • said control mechanism is so arranged, that the fabric mover is automatically lowered if the stitch-length is adjusted to become zero, and is again raised if the stitch-length is increased.
  • the looper shaft 4 is provided with an extension 28 penetrating the material of the machine body and adapted for attachment of a pool member when thread should be spooled.
  • a zig-zag stitch forming sewing machine comprising a base; a machine body on said base; and a horizontal looper shaft mounted in said base for recipr-ocation in a horizontal direction, the combination of a'needle bar arranged partly within the machine body and depending toward said base; an elongated bail located within said machine body having an integral depending portion projecting into said base and mounted for horizontal reciprocation; an enlarged end portion upon the elongated bail in which the needle bar is slidably mounted for vertical movement, the depending portion of said bail having a bearing hole for supporting said looper shaft in order to allow the latter to extend through said bail; means upon said looper shaft engaging with said bail at both ends of the bearing hole therein for preventing axial displacement of said looper shaft with respect to said bail; and operating means for reciprocating said bail in the horizontal direction and thereby oscillating the bail together with said needle bar and said looper shaft.
  • a zig-zag stitch forming sewing machine comprising a base; a substantially L-shaped hollow machine body having a longer horizontally extending body portion and a relatively shorter vertically extending body portion, the combination of a looper shaft mounted in said base reciprocably in a horizontal direction parallel to the longer body portion of said L-shaped machine body; a needle bar slidably mounted for vertical movement at the free end of said horizontally extending longer body portion of said L-shaped machine body; a substantially elongated bail having a longer bail portion and a relatively shorter bail portion, said bail being so disposed within said machine body that said longer bail portion is located within said longer body portion and said shorter bail portion is located within said short body portion and depending into said base; means including an enlarged free end portion upon the longer bail portion for supporting the needle bar for vertical sliding movement, the short end of said bail having a bearing hole through which the looper shaft extends means upon said looper shaft engaging with said bail at both ends of the bearing hole therein for preventing aXial displacement of said looper shaft with
  • sewing machine comprising a base; a machine body on said base; a horizontal looper shaft mounted in said base for reciprocation in a horizontal direction, the combination of a needle bar arranged partly within the machine body and depending toward said base; an elongated bail located within said machine body having an integral depending portion projecting into said base and mounted for horizontal reciprocation; an enlarged end portion uponthe elongated bail in which the needle bar is slidably mounted for vertical movement, the depending portion of said bail having a bearing hole for supporting said looper shaft in order to allow the latter to extend through said bail; means upon said looper shaft engaging with said bail at both ends of the bearing hole therein for preventing axial displacement of said looper shaft with respect to said bail; and operating means for reciprocating said bail in the horizontal direction and thereby oscillating the bail together with said needle bar and said looper shaft; said operating means including an arm disposed transversely of the depending portion of said bail; an angularly adjustable guide member; a crank with a connecting rod
  • a zig-zag stitch forming sewing machine comprising a base; a machine body on said base; a horizontal looper shaft mounted on said base for reciprocation in horizontal direction, the combination of a needle bar arranged partly within the machine body and depending toward said base; an elongated bail located within said machine body having an integral depending portion projecting 'into said base and mounted for horizontal reciprocation; an enlarged end portion upon the elongated bail in which the needle bar is slidably mounted for vertical movement, the depending portion of said bail having a bearing hole for supporting said looper shaft in order to allow the latter to extend through said bail; means upon /said looper shaft engaging With said bail at both ends of the bearing hole therein for preventing axial displacement of said looper shaft with respect to said bail and operating means for reciprocating said bail in the horizontal direction and thereby oscillating the bail together with said needle bar and said looper shaft; said operating means including an arm disposed transversely of the depending portion of said bail; an angularly adjustable guide member; a crank With a crank
  • a zig-zag stitch-forming sewing machine comprising a base; a machine body on said base; and a horizontal looper shaft mounted onsaid base for reciprocation in horizontal direction, the combination of a needle bar arranged partly Within the machine body and depending toward said base; an elongated bail located Within said machine body having an integral depending portion projecting into said base and mounted for horizontal reciprocation; an enlarged end portion upon the elongated bail in which the needle bar is slidably mounted for vertical movement, the depending portion of said bail having a bearing hole for supporting said looper shaft in order to allow the latter to extend through said bail;
  • said operating means including an arm disposed transversely of the depending portion of said bail; an'angularly adjustable guide member, a crank with a connecting rod pivotally connected to the intermediate portion of said arm and the latter arm at one end thereof operatively engaging with said bail, the angularly adjustable guide member having a curvilinear cam groove; a follower roller rotatably mounted at the other end of said arm and engaging in said curvilinear cam groove, at least the major intermediate portion of the curvilinear cam groove having a radius substantially equal to the length of said arm; a rotatably adjustable sleeve mounted in said machine body and having an eccentric bearing hole therein; and a shaft rotatably mounted in the eccentric bearing hole in said rotatably adjustable sleeve and rigid

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US722814A 1946-01-22 1947-01-18 Sewing machine Expired - Lifetime US2579248A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO260062X 1946-01-22

Publications (1)

Publication Number Publication Date
US2579248A true US2579248A (en) 1951-12-18

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ID=19905048

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Application Number Title Priority Date Filing Date
US722814A Expired - Lifetime US2579248A (en) 1946-01-22 1947-01-18 Sewing machine

Country Status (6)

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US (1) US2579248A (un)
BE (1) BE470686A (un)
CH (1) CH260062A (un)
DE (1) DE839751C (un)
FR (1) FR939872A (un)
GB (1) GB620548A (un)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988028A (en) * 1956-08-13 1961-06-13 John H Alcamo Surgeon's suturing device
US3020865A (en) * 1954-11-30 1962-02-13 Forster Geb Sewing machine for producing variable stitches

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967541C (de) * 1953-03-26 1957-11-21 Union Special Maschinenfab Zackenziernahtnaehmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1232263A (en) * 1916-05-23 1917-07-03 Singer Mfg Co Loop-taker-actuating mechanism for sewing-machines.
DE421357C (de) * 1924-08-24 1925-11-10 Clemens Graaff Doppelsteppstich-Zickzacknaehmaschine
US2045340A (en) * 1933-11-23 1936-06-23 Anker Werke Ag Zigzag stitching machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1232263A (en) * 1916-05-23 1917-07-03 Singer Mfg Co Loop-taker-actuating mechanism for sewing-machines.
DE421357C (de) * 1924-08-24 1925-11-10 Clemens Graaff Doppelsteppstich-Zickzacknaehmaschine
US2045340A (en) * 1933-11-23 1936-06-23 Anker Werke Ag Zigzag stitching machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020865A (en) * 1954-11-30 1962-02-13 Forster Geb Sewing machine for producing variable stitches
US3089444A (en) * 1954-11-30 1963-05-14 Forster Jakob Zig-zag sewing machines
US2988028A (en) * 1956-08-13 1961-06-13 John H Alcamo Surgeon's suturing device

Also Published As

Publication number Publication date
GB620548A (en) 1949-03-25
DE839751C (de) 1952-04-10
CH260062A (de) 1949-02-28
BE470686A (un)
FR939872A (fr) 1948-11-26

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