US2713839A - Drive for sewing machine cloth feeders - Google Patents

Drive for sewing machine cloth feeders Download PDF

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Publication number
US2713839A
US2713839A US283803A US28380352A US2713839A US 2713839 A US2713839 A US 2713839A US 283803 A US283803 A US 283803A US 28380352 A US28380352 A US 28380352A US 2713839 A US2713839 A US 2713839A
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US
United States
Prior art keywords
arm
feeder
sewing machine
cloth
crank
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
US283803A
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English (en)
Inventor
Engel Wolfgang
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.)
Gritzner Kayser AG
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Gritzner Kayser AG
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 Gritzner Kayser AG filed Critical Gritzner Kayser AG
Application granted granted Critical
Publication of US2713839A publication Critical patent/US2713839A/en
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Classifications

    • 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

Definitions

  • This invention relates to a drive assembly and more particularly has reference to means for driving the cloth feeder mechanism of a sewing machine.
  • the inventive concept is especially efficacious for use with a cloth feeder mechanism wherein the cloth feeder is carried by a substantially horizontally disposed arm which is reciprocated L
  • Yet another object of the invention is to provide a cloth feeder drive arrangement for sewing machines wherein means is included to change the elevation or vertical position of the cloth feeder mechanism during the advancing movement to compensate for the different types of cloth to be sewn.
  • a further object of this invention is to provide a drive assembly for use with cloth feeders of the type set forth which is relatively simple in structural detail, positive and efiicient in operation and which may be readily and inexpensively manufactured.
  • the assembly comprises a connection between the feeder arm and a crank element, a double link, one arm of which is associated with the feeder arm while the other arm is associated with an eccentric rotatable about a horizontal axis, a crank arm movable through an eccentric path is connected to the pivot between the two link arms so that during advancing movement, the link arms are substantially straight while during the return movernent, the link arms are bent relative to each other and means is operatively connected with the eccentric to change the position thereof whereby the point of pivot between the eccentric and the arm of the double link may be changed to alter the elevation of the cloth feeder during the advancing movement.
  • Fig. 1 is a view in side elevation, partly in cross section of the cloth feeder drive, the view looking from the looper side of the sewing machine.
  • Fig. 2 is a vertical sectional view taken along the line II-II of Fig. 1, the view looking in the direction of the arrows.
  • Fig. 3 and Fig. 4 are side elevational views respectively showing other positions of movement of the cloth feeder.
  • Figs. 5 to 8 inclusive represent diagrammatically the known ratios
  • FIG. 9 depicts diagrammatically the path of the cloth feeder.
  • the sowing machine is provided with a cloth carrier plate 1 and a stitching plate 2 is suitably fastened thereon.
  • the plate 2 is formed with conventional openings 3 for receiving the teeth of a cloth feeder assembly 4. Studs 5 are supported beneath the carrier plate 1 and a drive shaft 6 for a looper unit 7 is journalled in the studs.
  • the cloth feeder is carried by an arm 8 located below the plate 1 and disposed in a substantially horizontal plane.
  • the free end of the arm 8 is attached to a crank 9 which oscillates about a shaft 10, the means for turning the shaft not being shown. Hence, it will be appreciated that rotation of the shaft 10 will reciprocate the cloth feeder 4.
  • a bolt 11 is secured to the arm intermediate the ends thereof, and as illustrated in Fig. 2, arm 13 of a double link A or rocker is carried by the bolt by means of a split clamp 12.
  • the arm 13 is connected to arm 14 of the double link by a pivot pin 15, the arm 14 being swivelled at its opposite end to a stud 16 mounted eccentrically on a plate 17 secured to one end of a shaft 18.
  • An arm 18a is clamped to the shaft 18 and one end of an operating rod 19 is anchored to the arm 18a while the free end of the rod is connected to a hand lever 20 pivoted to a post 21 carried by the frame of the sewing machine.
  • the shaft 18 can be turned and thereby change the vertical position of the stud 16.
  • crank 22 One end of a crank 22 is secured to the pivot pin 15 as denoted at 23 and the opposite end of the crank is attached to an eccentric 24 provided on the shaft 6.
  • the assembly includes but few cardinal working parts and briefly the operation of the assembly is as follows:
  • Fig. 5 shows the various parts when the crank 9 has moved to the limit of its movement toward the left.
  • the arms 13 and 14 of the double link A are about straight or in the same plane.
  • the eccentric 24 turns from the location of Fig. 5, namely 25 to the position 26 illustrated in Fig. 6.
  • the relationship of the arms 13 and 14, that is to say, the straight position of these arms changes but little, so that during this full cycle or advancing movement, the cloth feeder 4 follows a substantial horizontal path which is denoted by the line connecting the positions 25 and 26 in Fig. 9.
  • the eccentric 24 rotates from the position 26 in Fig. 6 to the position 27 in Fig. 7 and it will be seen that the arms 13 and 14 are bent with respect to each other and thus the cloth feeder 4 is moved downwardly with respect to the stitching plate 2 and the path corresponding to this movement is shown between the positions 26 and 27 in Fig. 9.
  • the eccentric 24 will assume the position shown at 28 in Fig. 8 and this corresponds to the position 28 in Fig. 9.
  • the position of the stud 16 is such that feeder teeth project their greatest limit beyond the stitching plate 2 which is desired when thick cloth or material is being sewn and the hand lever 20 is in its central position.
  • the lever 20 By moving the lever upwardly to the location denoted 210, the stud 16 can be lowered a short distance in the direction of the arrow 20% and thus the position of the cloth feeder relative to the cloth can be readily adapted to the thickness of the cloth. If, however, the lever 20 is swung downwardly to the position shown at 211, the stud 16 will be displaced to the position illustrated in Fig. 4 and consequently, the feeder teeth do not project above the stitching plate during the advancing movement of the feeder 4.
  • the means for moving the cloth feeder in a reciprocatory manner with respect to the stitching plate may be termed a swinging-block linkage.
  • a cloth feeder movable in a reciprocatory manner with respect to said plate by a swinging-block linkage
  • a swinging-block linkage comprising in combination, a rotatable shaft, a crank connected to the shaft, the movement of the crank oscillating the said swinging-block linkage, an arm carrying the cloth feeder, a pivot connection between one end of the arm and the crank whereby the arm is substantially perpendicular thereto, a rocker, a pivot connection between the rocker and the other end of the arm with the rocker substantially parallel with the crank, an adjustably mounted stud, a swivel connection between the other end of the rocker and the stud so that when the crank is rocked by the rotation of the shaft, the cloth feeder will be moved in a reciprocatory manner respecting the stitching plate and in parallelism thereto, and means associated with the said rocker for periodically changing the length of the rocker between the pivot connection of the rocker to the arm and the swivel connection to the stud so as
  • the means for periodically changing the length of the rocker comprises a first arm pivoted to the arm carrying the feeder, a second arm swivelled on the stud, a pivot pin connecting the first and second arms together and with the pivot pin being periodically actuated in a reciprocatory manner in a substantially transverse direction with respect to the direction in which the rocker extends so that when the pivot pin is reciprocated, the first and second levers are bent with respect to each other and are then brought into a straight position respectively thereby changing the length of the rocker periodically.
  • a sewing machine wherein said pivot pin is actuated by a crank connected at one end to the pivot pin and eccentrically mounted at the other end to a rotatable shaft so that one complete rotation of such shaft is effected during one complete reciprocatory movement of the swinging-block linkage.
  • first and second arms are in a straight position during one half of the reciprocatory movement of the swinging-block linkage and are in a bent position with regard to each other during the other half of the oscillating movement of the said linkage.
  • a sewing machine according to claim 4 wherein the said stud is eccentrically mounted on a shaft disposed horizontally respecting the stitching plate whereby rotation of the horizontal shaft adjusts the position of the stud.
  • a sewing machine according to claim 5 wherein the position of the stud closest to the stitching plate coincides approximately with the highest position of the eccentric so rotation of the eccentric in either direction from its highest position will lower the stud.
  • a sewing machine wherein an arm is on said horizontal shaft, a lever connected to the arm effects turning of the shaft and the connection between the arm and lever is such that the mid location of the arm determines the position of the eccentric closest to the stitching plate.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US283803A 1951-04-27 1952-04-23 Drive for sewing machine cloth feeders Expired - Lifetime US2713839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE304359X 1951-04-27

Publications (1)

Publication Number Publication Date
US2713839A true US2713839A (en) 1955-07-26

Family

ID=6117113

Family Applications (1)

Application Number Title Priority Date Filing Date
US283803A Expired - Lifetime US2713839A (en) 1951-04-27 1952-04-23 Drive for sewing machine cloth feeders

Country Status (6)

Country Link
US (1) US2713839A (es)
BE (1) BE511023A (es)
CH (1) CH304359A (es)
FR (1) FR1055206A (es)
GB (1) GB709383A (es)
NL (1) NL85045C (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087436B (de) * 1955-12-20 1960-08-18 Flii Borletti Soc Per Azioni Vorrichtung zum Einstellen des Stoffvorschubes bei Naehmaschinen
FR2467901A1 (fr) * 1979-10-24 1981-04-30 Union Special Corp Mecanisme d'alimentation pour machines a coudre
US5299518A (en) * 1988-06-04 1994-04-05 Pfaff Industriemaschinen Gmbh Lower feed dog lifting, lowering, and horizontal coupling
US5313900A (en) * 1991-08-09 1994-05-24 Husqvarna Sewing Machines Aktiebolag Feed direction and stitch length cam for zigzag sewing machine
US5337689A (en) * 1992-06-19 1994-08-16 Union Special Gmbh Feed dog mechanism for sewing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106835513A (zh) * 2017-03-24 2017-06-13 杰克缝纫机股份有限公司 缝纫机的送料驱动机构及缝纫机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US882266A (en) * 1905-12-04 1908-03-17 Singer Mfg Co Feeding mechanism for sewing-machines.
US1176444A (en) * 1914-06-27 1916-03-21 Reece Button Hole Machine Co Sewing-machine feeding mechanism.
US1817727A (en) * 1927-01-11 1931-08-04 Union Special Machine Co Feeding mechanism for sewing machines
US2228718A (en) * 1939-05-15 1941-01-14 Nat Sewing Machine Co Stitch regulator and reversing mechanism for sewing machines
DE807164C (de) * 1949-09-27 1951-06-25 Anker Werke Ag Stoffschieberantrieb

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US882266A (en) * 1905-12-04 1908-03-17 Singer Mfg Co Feeding mechanism for sewing-machines.
US1176444A (en) * 1914-06-27 1916-03-21 Reece Button Hole Machine Co Sewing-machine feeding mechanism.
US1817727A (en) * 1927-01-11 1931-08-04 Union Special Machine Co Feeding mechanism for sewing machines
US2228718A (en) * 1939-05-15 1941-01-14 Nat Sewing Machine Co Stitch regulator and reversing mechanism for sewing machines
DE807164C (de) * 1949-09-27 1951-06-25 Anker Werke Ag Stoffschieberantrieb

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087436B (de) * 1955-12-20 1960-08-18 Flii Borletti Soc Per Azioni Vorrichtung zum Einstellen des Stoffvorschubes bei Naehmaschinen
FR2467901A1 (fr) * 1979-10-24 1981-04-30 Union Special Corp Mecanisme d'alimentation pour machines a coudre
US5299518A (en) * 1988-06-04 1994-04-05 Pfaff Industriemaschinen Gmbh Lower feed dog lifting, lowering, and horizontal coupling
US5313900A (en) * 1991-08-09 1994-05-24 Husqvarna Sewing Machines Aktiebolag Feed direction and stitch length cam for zigzag sewing machine
US5337689A (en) * 1992-06-19 1994-08-16 Union Special Gmbh Feed dog mechanism for sewing machine

Also Published As

Publication number Publication date
GB709383A (en) 1954-05-19
NL85045C (es)
CH304359A (de) 1955-01-15
BE511023A (es)
FR1055206A (fr) 1954-02-17

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