US2647481A - Feed mechanism for sewing machines - Google Patents

Feed mechanism for sewing machines Download PDF

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Publication number
US2647481A
US2647481A US235963A US23596351A US2647481A US 2647481 A US2647481 A US 2647481A US 235963 A US235963 A US 235963A US 23596351 A US23596351 A US 23596351A US 2647481 A US2647481 A US 2647481A
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US
United States
Prior art keywords
lever
arm
sewing machines
feed mechanism
movement
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
US235963A
Inventor
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 US2647481A publication Critical patent/US2647481A/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 handle I6 allows, on the one hand, adjust- ,ment of the amplitude of oscillatory movement of the rigid lever 3 and, on the other hand,'reversal of direction of advance of the feed dog I.
  • the pinion 8 instead of having a vertical axis, may turn about a horizontal nary cam.
  • the cam Il may be an ordielement, a rigid lever mounted for rocking movement about a fixed vertical axis, an eccentric mounted for rotation about a vertical axis and driven by said driving element, a transverse lever pivotally connected intermediate its ends to one end of the rigid lever for pivotal movement relativethereto about'a vertical axis, a connecting rod connecting the eccentric toone end of the transverse lever for imparting rocking movement .to said transverse lever, an arm mounted at one end for adjustment about a fixed vertical axis, a linkconnecting the other end of the arm to the other end of the transverse lever, means for adjusting the arm about said fixed vertical axis, to vary the angular relation.
  • a mechanism according to claim 1 in which the means for transmitting oscillating movement to the input arm of thesecond lever comprises a cam carried by the eccentric.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Transmission Devices (AREA)

Description

Aug. 4, 1953 J. COURT FEED MECHANISM FOR SEWING MACHINES 2 Sheets-Sheet 1 Filed July 10, 1951 Iwvenlor TZET; Col/hf Aug. 4, 1953 J. COURT 2,647,481
FEED MECHANISM FOR SEWING MACHINES Filed July 10, 1951 2 Sheets-Sheet 2 g 8 g? o 32 & O
I/ vvavraR JEAN Caz/R7 other.
axis.
about the pivot 6 of the lever 4 and the movements of oscillation about the pivot 5 of the lever 3, are synchronised.
It is also to be observed that the distance of the pivot I3 from the hinge pivot 25 of the arm l2 on the transverse lever II is the same as that separating the said pivot 25 from the'pivotal axis 26 of the transverse lever l I on the rigid lever 3.
The operation of the mechanism described above is as follows:
When the two pivots I3 and 26 are brought into coincidence with one another by means of the handle I6 and the pinion 8 is set in rotation, the cam I'I produces the upward" and downward movements of the feed dog and the eccentric Ill, by acting on the transverse lever I I through the medium of the link 9, causes the latter torock about its pivotal axis 26 without producing any movement of oscillation of the lever 3 and, consequently, the feed dog I isnot subjected to any forward movement. When acting on the handle land-fro movement of the feed dog.
According to the position of the pivot I3 on one side or the other of the transverse lever I I, the
feed dog I advances either in one direction or the For this reason it will thus be seen that the handle I6 allows, on the one hand, adjust- ,ment of the amplitude of oscillatory movement of the rigid lever 3 and, on the other hand,'reversal of direction of advance of the feed dog I.
From the foregoing description it will be seen that the movements, either in a vertical plane or in a horizontal plane, of the feed dog, are always synchronised, in view of the fact that they are controlled by a cam and an eccentric secured to manner by the pinion 8.
In a modification, the pinion 8, instead of having a vertical axis, may turn about a horizontal nary cam. However, it is then necessary for the hinge of the link 9 o'n'the transverse lever II to In this case, the cam Il may be an ordielement, a rigid lever mounted for rocking movement about a fixed vertical axis, an eccentric mounted for rotation about a vertical axis and driven by said driving element, a transverse lever pivotally connected intermediate its ends to one end of the rigid lever for pivotal movement relativethereto about'a vertical axis, a connecting rod connecting the eccentric toone end of the transverse lever for imparting rocking movement .to said transverse lever, an arm mounted at one end for adjustment about a fixed vertical axis, a linkconnecting the other end of the arm to the other end of the transverse lever, means for adjusting the arm about said fixed vertical axis, to vary the angular relation. betweensaid link and transverse leverto vary the direction and amplitude of rocking movement of the rigid lever imparted thereto by rocking movement ofthe transverse lever, means transmitting horizontal oscillating movement from the other end of the rigid .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 iconnecting'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 movementin 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. U
2. A mechanism according to claim 1 in which the means for transmitting oscillating movement to the input arm of thesecond lever comprises a cam carried by the eccentric.
' l JEAN COURT.
References Cited in the file of, this patent UNITED STATES PATENTS Number Name Date 587,908 Ammerman et a1. Aug. 10, 1897 623,271 Allen Apr. 18, 1899 690,680 Todd 1 Jan. 7, 1902 2,578,225 Casas-Roberts et a1.-- Dec. 11, 1951
US235963A 1948-12-20 1951-07-10 Feed mechanism for sewing machines Expired - Lifetime US2647481A (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
US2647481A true US2647481A (en) 1953-08-04

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 Before (1)

Application Number Title Priority Date Filing Date
US84610A Expired - Lifetime US2578225A (en) 1948-12-20 1949-03-31 Feeding device for sewing machines

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990373A (en) * 1974-10-23 1976-11-09 Mefina S.A. Mechanism for the automatic modulation of the direction and amplitude of movements of a member for feeding pieces to be sewn in a sewing machine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE504038A (en) * 1948-12-20
US2986107A (en) * 1954-04-29 1961-05-30 Husquvarna Vapenfabriks Aktieb Zigzag sewing machines
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
CN112095232B (en) * 2020-09-21 2024-07-26 福建省华增鞋业科技有限公司 Novel high-head sewing machine with double needles

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587908A (en) * 1897-08-10 Necticut
US623271A (en) * 1899-04-18 Feeding mechanism for sewing-machines
US690680A (en) * 1901-03-21 1902-01-07 New Domestic Sewing Machine Company Feeding mechanism for sewing-machines.
US2578225A (en) * 1948-12-20 1951-12-11 Mefina Sa Feeding device for sewing machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US587908A (en) * 1897-08-10 Necticut
US623271A (en) * 1899-04-18 Feeding mechanism for sewing-machines
US690680A (en) * 1901-03-21 1902-01-07 New Domestic Sewing Machine Company Feeding mechanism for sewing-machines.
US2578225A (en) * 1948-12-20 1951-12-11 Mefina Sa Feeding device for sewing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990373A (en) * 1974-10-23 1976-11-09 Mefina S.A. Mechanism for the automatic modulation of the direction and amplitude of movements of a member for feeding pieces to be sewn in a sewing machine

Also Published As

Publication number Publication date
NL70577C (en)
FR1000996A (en) 1952-02-18
CH277256A (en) 1951-08-31
DE832840C (en) 1952-02-28
FR61783E (en) 1955-05-17
US2578225A (en) 1951-12-11
GB683370A (en) 1952-11-26
GB683292A (en) 1952-11-26
BE492408A (en)
DE868100C (en) 1953-02-23
CH288068A (en) 1952-12-31
BE504038A (en)

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