US2868150A - Means for adjusting the stroke of the feed dog in sewing-machines - Google Patents

Means for adjusting the stroke of the feed dog in sewing-machines Download PDF

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Publication number
US2868150A
US2868150A US625399A US62539956A US2868150A US 2868150 A US2868150 A US 2868150A US 625399 A US625399 A US 625399A US 62539956 A US62539956 A US 62539956A US 2868150 A US2868150 A US 2868150A
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United States
Prior art keywords
lever
feed dog
adjusting
machines
sewing
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Expired - Lifetime
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US625399A
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English (en)
Inventor
Moro Antonio
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.)
Borletti SpA
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Borletti SpA
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Publication date
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Publication of US2868150A publication Critical patent/US2868150A/en
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    • 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

Definitions

  • FIG. 2 MEANS FOR ADJUSTING THE STROKE OF THE FEED DOG IN SEWING-MACHINES Filed Nov. :50, 1956 FIG. 2
  • the present invention relatesto a device for stopping said actuating lever in any chosen position, that is to a device making it possible to establish the feed dog displacing amplitude each time in any desired manner, and'keeping said amplitude equal for both the forward and the backward displacing; said device differs from already known devices of the same kind due to a particular structure adapted to give it a wide possibility of varying the stop-position, assuring, at the same time, by simple means, a speedy and safe operation.
  • This device is characterized in that two double-armed levers, mounted on two pivots respectively placed on either side of the pivot of the actuating lever of the adjusting mechanism, are so combined with two cams mounted the one over the other, with different orientation on a common pivot, that said cams, placed between two corresponding arms of said levers, held by springs adherent to the cams, impart by their rotation in either direction a movement for opening or shutting respectively said levers like scissors said levers serving by means of their other two arms as stops for a pivot carried by the actuating lever of the adjusting mechanism.
  • the spring by means of which the lever for determining the forward displacing of the cloth-pushing feed dog is held adherent to the corresponding driving cam, is disposed in such a manner as to always hold said lever approached to the stop of the actuating lever of the adjusting mechanism, the latter lever being thus always carried along by said former lever, in its movement.
  • the only driving of the stop device according to the invention is sufficient for producing, at the same time, the driving of forward seam of the adjusting mechanism, thus greatly simplifying the relative handling.
  • Fig. 1 shows in front view the device in a zero position, that is in the position not displacing the feed dog
  • Fig. 2 is a cross section ofthe device according to lines A-B of Fig. 1;
  • Fig. 3 is a front view of the device shown in position for a maximum stitch length
  • Fig. 4 shows a modification of the driving means for the actuating lever of the adjusting mechanism.
  • pin 1 preferably eccentric for the phase adjusting, is fixed on bell crank lever 2 actuating the mechanism for adjusting the dis placement of the cloth-feeding dog, that is to the lever, the position of which through a mechanism shown in More British Patent No. 788,081, controls the pitch and the displacing direction. of the feed dog transporting the cloth.
  • Lever 2 is fixed on pivot 3 adapted to rotate in hole 4 of bearing 5 fixed to the machine frame. Externally to hearing 5, handle 6 for shifting lever 2 is fixed on pivot 3.' Pin 1 is restrained in its displacings about the axis of pivot 3 by the two arms 7 and 8 of the two levers 9 and 10, respectively pivoted at 11 and 12.
  • the other two arms 13 and 14 of levers 9 and 10 have the respective surfaces 15 and 16 always in contact with the peripheral surfaces 17 and 18 respectively, of two cams 19 and 20 similar to each other but having different orientation, said cams being mounted on shaft 21 rotated from the outside by knob 22.
  • These cams can be relatively displaceable between each other for the phase adjusting,,and can be fixed on shaft 21 after the displacing.
  • Pin 1 of lever 2 is always held against arm 7 by spring 23, which keeps the cam-engaging surface 15 on cam 17.
  • Cam-engaging surface 16 of arm 14 is always held in engagement with cam 18 by a spring 24.
  • knob 22 is provided with a graduation 29 adapted to be read in correspondence of the fixed index 39, the graduation values, for instance, can cor- 3 respond to millimeters of the feed dog displacement for each stitch.
  • Fig. 3 shows cams l9 and 20 and, respectively lever, 7 and 8 in position of a maximum opening corresponding to the maximum stitch length: lever 2 can be brought, according to arrow 28, from where pin 1 is in position 31 to where it is in position 32, thus preparing the feed dog for the maximum forward and, respectively, backward stroke.
  • lever 2 carries another arm 2 connected through tie rod 33 to end 34 of a lever pivoted at 35 and being remote from lever 2; the rotation of lever 2 is effected by actuating lever 36, all the remainder working as previously described.
  • Mechanism for controlling the setting of a feed dog control lever comprising a feed dog control lever, said lever having a pin on one arm thereof, a shaft rotatably mounting said lever, second and third shafts disposed on opposite sides of said first shaft, a pair of displacement control levers mounted on said second and third shafts and having cam follower surfaces on the lower arms thereof and engagement surfaces for said pin on the upper arms thereof, and adjustable cam means contacting said cam follower surfaces to vary the positions of said displacement control levers and thereby control the range of movement of said pin and feed dog control lever.
  • said adjustable cam means comprising a pair of cam plates mounted on a common shaft, and means to turn said shaft to vary the setting of said cams.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US625399A 1955-12-20 1956-11-30 Means for adjusting the stroke of the feed dog in sewing-machines Expired - Lifetime US2868150A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2868150X 1955-12-20

Publications (1)

Publication Number Publication Date
US2868150A true US2868150A (en) 1959-01-13

Family

ID=11436148

Family Applications (1)

Application Number Title Priority Date Filing Date
US625399A Expired - Lifetime US2868150A (en) 1955-12-20 1956-11-30 Means for adjusting the stroke of the feed dog in sewing-machines

Country Status (4)

Country Link
US (1) US2868150A (fr)
BE (1) BE552743A (fr)
DE (1) DE1087436B (fr)
FR (1) FR1165951A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022756A (en) * 1959-01-30 1962-02-27 Mefina Sa Mechanism for adjusting the length of stitch on a sewing machine
US3064604A (en) * 1958-04-12 1962-11-20 Borletti Spa Device for regulating the displacement of the fabric feed member in sewing machines
US3108555A (en) * 1959-06-19 1963-10-29 Anker Phoenix Nahmaschinen Ag Device for controlling the needle-bar motion and the material feed in sewing machines
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH606573A5 (fr) * 1976-12-28 1978-11-15 Mefina Sa

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB314696A (en) * 1928-07-24 1929-07-04 Edward Croasdale Improvements relating to sewing machines
US2679220A (en) * 1951-06-01 1954-05-25 New Process Gear Corp Stitch control mechanism for sewing machines
US2704986A (en) * 1951-11-30 1955-03-29 Vittorio Necchi S P A Knob adjusting means for adjustable sewing machine feed

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE179615C (fr) * 1905-09-01
DE594877C (de) * 1933-01-09 1934-03-23 Pfaff Ag G M Stichstellvorrichtung fuer Naehmaschinen
DE641653C (de) * 1935-10-05 1937-02-10 Phoenix Naehmaschinen A G Baer Stoffschieber fuer Naehmaschinen
US2119492A (en) * 1935-12-19 1938-05-31 Union Special Machine Co Feed mechanism for sewing machines
BE499705A (fr) * 1949-12-17
CH288136A (de) * 1950-04-11 1953-01-15 Zuendapp Werke Gmbh Stichverstellungseinrichtung an einer Nähmaschine.
DE850260C (de) * 1951-03-16 1952-09-22 Pfaff Ag G M Stichstelleinrichtung an Naehmaschinen
NL85045C (fr) * 1951-04-27
CH307292A (de) * 1951-10-15 1955-05-31 Anker Werke Ag Einen Griff aufweisendes Bedienungsmittel zum Verstellen der Stichlänge an einer Nähmaschine.
DE910499C (de) * 1951-12-21 1954-05-03 Franz Brixa Dipl Ing Zickzacknaehmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB314696A (en) * 1928-07-24 1929-07-04 Edward Croasdale Improvements relating to sewing machines
US2679220A (en) * 1951-06-01 1954-05-25 New Process Gear Corp Stitch control mechanism for sewing machines
US2704986A (en) * 1951-11-30 1955-03-29 Vittorio Necchi S P A Knob adjusting means for adjustable sewing machine feed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064604A (en) * 1958-04-12 1962-11-20 Borletti Spa Device for regulating the displacement of the fabric feed member in sewing machines
US3022756A (en) * 1959-01-30 1962-02-27 Mefina Sa Mechanism for adjusting the length of stitch on a sewing machine
US3108555A (en) * 1959-06-19 1963-10-29 Anker Phoenix Nahmaschinen Ag Device for controlling the needle-bar motion and the material feed in sewing machines
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
FR1165951A (fr) 1958-10-31
BE552743A (fr)
DE1087436B (de) 1960-08-18

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