US2578225A - Feeding device for sewing machines - Google Patents

Feeding device for sewing machines Download PDF

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Publication number
US2578225A
US2578225A US84610A US8461049A US2578225A US 2578225 A US2578225 A US 2578225A US 84610 A US84610 A US 84610A US 8461049 A US8461049 A US 8461049A US 2578225 A US2578225 A US 2578225A
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US
United States
Prior art keywords
lever
arm
cam
feeding device
horizontal
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
Application number
US84610A
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English (en)
Inventor
Robert Ramon Casas
Court Jean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mefina SA
Original Assignee
Mefina SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mefina SA filed Critical Mefina SA
Application granted granted Critical
Publication of US2578225A publication Critical patent/US2578225A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B15/00—Machines for sewing leather goods
    • D05B15/02—Shoe sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/005—Doors or covers for accessing inner parts of the machine; Security devices therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the present invention relates to anactuating mechanism for the feeder of a sewing machine which differs from the known mechanisms yffihe fact that the said feeder is carried by asupport connected to an actuating element by mean of two levers, the first one of which is rigid and rocks around a fixed vertical axle, while 13116560, and one is elastic, in order to enable it vto follow the displacement of the first one and rocl s around a fixed horizontal axle.
  • the attached drawing shows diagrammatically and by way of example a form of execution of the mechanism.
  • Fig. 1 is a perspective View
  • Fig. 2 is a side View
  • Fig. 3 is a top view of the mechanisms housed in the lower ,arm of the sewing machine
  • Fig. 4 is a vertical section view .of the column of the machine.
  • the actuating mechanism for the feeder vor feeding device I includes a cam 2 rigidlyfixed to a shaft 3 driven in rotation by a driving shaft P of the sewing machine through a belt B.
  • This cam 2 is connected to the feeder by two transmission levers, of which one imparts to it a rocking movement in a horizontal plane and the other, a rocking movement in a vertical plane.
  • the first transmission device includes aboss .14 carried at one end of a first arm 5 and inwhich is fixed an axle v6 of which the ends slide into bores or guides giprovidedin the two branches of a support I having the general form of a U.
  • the feeder I is rigidly fixed on the upper face 8 of the support I.
  • the arm 5 has, at its end opposite to that carrying the bossA, two branches 9 (Fig. 2) arranged in the formofa fork and between which is engaged one ofthe ends of a second arm I Ii.
  • the arm I8 carries two guides I5 and I-B (Fig. 3) into which slides a rod I'I carrying adriving carriage I8.
  • the latter has:
  • the second transmission device includes a lever consisting of an elastic blade 2'1 in one end of which is cut out a tongue 36 of triangular form.
  • the blade 21 and tongue 36 are secured to a part 28 by means of a bridge 31 and rivets 42.
  • the part 28 has the shape of a U, of which the two wings-are connected together by one of the arms of an L-shaped part 29.
  • the second arm of this part 29 serves as an actuating finger 3i? kept in contact with the profile of the cam 2 by a coil spring 3
  • the tongue 3% carries an axle 32 freely pivoted in a bearing 48 carried in the support I3. This axle 32 is horizontal and is kept in position in the bearing 40 by a stop element 4
  • the finger 30 is engaged in a guide provided by a slot 38 in the free end of a rod 39, rigidly fastened to the frame of the machine, and on which is mounted the return spring 35.
  • he end of the elastic blade 2'! has a notch ed in which is engaged the end of an axle 3d freely mounted in the bore of a boss 35 provided in the support I.
  • axle 43 is driven in a rocking movement in a vertical plane and due to the resilient nature of arm 21, it can follow the horizontal rocking movement imparted to the axle 6 by lever 5, 18.
  • the support 1 is connected to the cam 2 by means of two levers, of which the first one 5, ill is rigid and rocks around a fixed axle l2, while the second one (21, 28, 29, 3G and 36) is elastic and rocks about the horizontal axis 32 of the bearing it.
  • the two rocking movements imparted to the support '1 being effected by a single cam 2, their synchronism is automatically ensured.
  • are spaced angularly by about 90", so that the two rocking movements are dephased by 90.
  • the surfaces 1' of this cam are connected together by surfaces m having the form of arcs of circles centered on the rotation axis of the cam, the result is that the arms are alternately driven, so that the feeder is displaced by the actuating mechanism along an approximately rectangular path, and that it is always displaced horizontally and at a constant height over practically all the length of its advancement stroke, irrespective of the extent of said stroke over the upper or lower level of the work plate w.
  • This feature is also of great importance, because it ensures an absolutely regular feeding of the cloth and avoids any stretching of the latter.
  • the bore made in the arm 9 for the screw H has a dimension sufiicient to permit the adjustelement, a rigid lever mounted for rocking movement about a fixed vertical axis, means associated with the driving element for transmitting horizontal oscillating movement to one end of said lever, means transmitting horizontal oscillating movement from the other end of the lever to said feeding device, a second lever mounted for rocking movement about a fixed horizontal axis, said second lever having an input arm and an output arm, means for transmitting oscillating movement in a vertical plane to the end of the input arm, and means for transmitting vertical oscillating movement from the end of the output arm to said feeding device, said output arm being rigid in a vertical plane to effect the transmission of vertical oscillation, and flexible in a horizontal direction to enable the feeding device to oscillate in a horizontal plane without affecting the input arm of the second lever.
  • An actuating mechanism for the feeding device of a sewing machine comprising a driving element, a cam carried by said driving element, a rigid lever mounted for rocking movement about a fixed vertical axis, means including a cam follower engaging said cam for imparting horizontal movement to one end of said lever about said verticalaxis, means transmitting horizontal oscillating movement from the other end of the lever to said feeding device, a second lever mounted for rocking movement about a fixed horizontal axis, said second lever having an input arm and an output arm, means connecting the output arm of the second lever to the input arm thereof to render the output arm rigid with the input arm in a vertical plane but to enable the output arm to oscillate in a horizontal plane relative to the input arm, means engaging said cam for imparting oscillating movement to the end of the input arm, and means for transmitting ing at the factory of the horizontal position of the feeder I in relation to the needle N for a given position of the cam 2.
  • An actuating mechanism for the feeding device of a sewing machine comprising a driving element, a rigid lever mounted for rocking movement about a fixed vertical axis, means associated with the driving element for transmitting horizontal oscillating movement to one end of said lever, means transmitting horizontal oscillating movement from the other end of the lever said feeding device, a second lever mounted for rocking movement about a fixed horizontal axis, said second lever having an imput arm and output arm, means connecting the output arm of the second lever to the input arm thereof to render the output arm rigid with the input arm in a vertical plane but to enable the output arm to oscillate in a horizontal plane relative to the input arm, means for transmitting oscillating movement in a vertical plane to the end or" the input arm, and means for transmitting vertical osciliating movement from the end of the output arm to said feeding device.
  • An actuating mechanism for the feeding de-- vice of a sewing machine comprising a driving vertical oscillating movement from the end of the output arm to said feeding device.
  • An actuating mechanism for the feeding device of a sewing machine comprising a driving element, a cam carried by said driving element, a rigid lever mounted for rocking movement about a fixed vertical axis, means including a cam follower engaging said cam for imparting horizontal movement to one end of said lever about said vertical axis, means transmitting horizontal oscillat'mg movement from the other end of the lever to said feeding device, a second lever mounted for rocking movement about a fixed horizontal axis, said second lever having an input arm and an output arm, means connecting the output arm of the second lever to the input arm thereof to render the output arm rigid with the input arm in a vertical plane but to enable the output arm to oscillate in a horizontal plane relative to the input arm, means engaging said cam for imparting oscillating movement to the end of the input arm, and means for transmitting vertical oscillating movement from the end of the output arm to said feeding device, said cam having two opposed partially cylindrical surface portions of different radii, and concentric with the rotation axis of the cam, connected by inclined ram portions and
  • An actuating mechanism for the feeding device of a sewing machine comprising a driving element, a cam carried by said driving element, a rigid lever mounted for rocking movement about a fixed vertical axis, a driving carriage mounted on one end of said rigid lever for sliding movement longitudinally of the lever, a cam follower fixed on said carriage and engaging said cam so that rotation of the cam imparts reciprocating movement longitudinally of said lever, a guide element mounted for rotation about an axis parallel to the axis of said lever and provided with a diametrically extending guide slot, means carried by said carriage and extending into the slot of the guide element and operable to impart horizontal oscillating movement of the carirage and the end of the lever carrying the same about said vertical axis, means transmitting horizontal oscillating movement from the other end of the lever to said feeding device, a second lever mounted for rocking movement about a fixed horizontal axis, said second lever having an input arm and an output arm, means connecting the output arm of the second lever to the input arm thereof to render the output arm rigid with the input arm

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Transmission Devices (AREA)
US84610A 1948-12-20 1949-03-31 Feeding device for sewing machines Expired - Lifetime US2578225A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2578225X 1948-12-20
CH288068T 1950-07-17

Publications (1)

Publication Number Publication Date
US2578225A true US2578225A (en) 1951-12-11

Family

ID=25732781

Family Applications (2)

Application Number Title Priority Date Filing Date
US84610A Expired - Lifetime US2578225A (en) 1948-12-20 1949-03-31 Feeding device for sewing machines
US235963A Expired - Lifetime US2647481A (en) 1948-12-20 1951-07-10 Feed mechanism for sewing machines

Family Applications After (1)

Application Number Title Priority Date Filing Date
US235963A Expired - Lifetime US2647481A (en) 1948-12-20 1951-07-10 Feed mechanism for sewing machines

Country Status (7)

Country Link
US (2) US2578225A (xx)
BE (2) BE492408A (xx)
CH (2) CH277256A (xx)
DE (2) DE832840C (xx)
FR (2) FR1000996A (xx)
GB (2) GB683292A (xx)
NL (1) NL70577C (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647481A (en) * 1948-12-20 1953-08-04 Mefina Sa Feed mechanism for sewing machines
US2986107A (en) * 1954-04-29 1961-05-30 Husquvarna Vapenfabriks Aktieb Zigzag sewing machines

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2906220A (en) * 1957-04-12 1959-09-29 Singer Mfg Co Feed mechanisms for sewing machines
GB848503A (en) * 1958-02-03 1960-09-21 Ivan Alexander Leslie Improvements in the feeding mechanism of sewing machines
CH578073A5 (xx) * 1974-10-23 1976-07-30 Mefina Sa
CN112095232A (zh) * 2020-09-21 2020-12-18 福建省华昂体育用品有限公司 一种新型双针高头车针车

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587908A (en) * 1897-08-10 Necticut
US690680A (en) * 1901-03-21 1902-01-07 New Domestic Sewing Machine Company Feeding mechanism for sewing-machines.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US623271A (en) * 1899-04-18 Feeding mechanism for sewing-machines
BE504038A (xx) * 1948-12-20

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587908A (en) * 1897-08-10 Necticut
US690680A (en) * 1901-03-21 1902-01-07 New Domestic Sewing Machine Company Feeding mechanism for sewing-machines.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647481A (en) * 1948-12-20 1953-08-04 Mefina Sa Feed mechanism for sewing machines
US2986107A (en) * 1954-04-29 1961-05-30 Husquvarna Vapenfabriks Aktieb Zigzag sewing machines

Also Published As

Publication number Publication date
CH277256A (fr) 1951-08-31
BE492408A (xx)
GB683370A (en) 1952-11-26
FR1000996A (fr) 1952-02-18
BE504038A (xx)
DE832840C (de) 1952-02-28
US2647481A (en) 1953-08-04
FR61783E (fr) 1955-05-17
GB683292A (en) 1952-11-26
NL70577C (xx)
DE868100C (de) 1953-02-23
CH288068A (fr) 1952-12-31

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