US2970556A - Stitch length adjusting means for sewing machines - Google Patents

Stitch length adjusting means for sewing machines Download PDF

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Publication number
US2970556A
US2970556A US716696A US71669658A US2970556A US 2970556 A US2970556 A US 2970556A US 716696 A US716696 A US 716696A US 71669658 A US71669658 A US 71669658A US 2970556 A US2970556 A US 2970556A
Authority
US
United States
Prior art keywords
lever
slot
stitch length
block
pitman
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
US716696A
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English (en)
Inventor
Ralph E Johnson
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.)
Singer Co
Original Assignee
Singer Co
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
Priority to BE554471D priority Critical patent/BE554471A/xx
Priority to GB39/57A priority patent/GB802464A/en
Priority to CH351485D priority patent/CH351485A/de
Priority to FR1170243D priority patent/FR1170243A/fr
Priority to US716696A priority patent/US2970556A/en
Application filed by Singer Co filed Critical Singer Co
Priority to GB18790/58A priority patent/GB888606A/en
Priority to FR776334A priority patent/FR74489E/fr
Priority to DE1959S0029336 priority patent/DE1791072U/de
Priority to CH6848959A priority patent/CH368695A/de
Application granted granted Critical
Publication of US2970556A publication Critical patent/US2970556A/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
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
    • F16K41/12—Spindle sealings with diaphragm, e.g. shaped as bellows or tube with approximately flat diaphragm
    • 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

Definitions

  • the present invention relates to a feeding mechanism for sewing machines and has for a primary object to provide a new and improved stitch length adjusting means for the feeding mechanism of a sewing machine.
  • the usual feeding mechanism of a family type sewing machine includes a pivoted block having a guide channel or slideway that cooperates with a slide block on the feed advance. actuating pitman of the feeding mechanism to impart endwise motion to the pitman upon oscillation thereof. The amount of the endwise motion of the pitman determines the feed advance stroke of the feeding mechanism and, in turn, is determined by the setting of the pivot block.
  • Manual adjustment of the setting of the pivot block is provided by means of a stitch length adjusting lever secured to the pivot block and extending through a slot in the frame of the machine, or more commonly, through a slot in a stitch indicator plate, to Where it is conveniently accessible to the operator.
  • the stitch length adjusting lever cooperates with indicia on the frame or stitch indicator plate adjacent to the side edge of the slot.
  • the lever is provided with an adjustable stop that cooperates with the stitch indicator plate to limit pivotal movement of the lever to a predetermined setting.
  • the present invention is directed specifically to the provision of a stitch length adjusting means for family sewing machines which will afford means for adjustably limiting the pivotal movement of the stitch length adjusting lever and will clearly indicate the setting of the same and, at the same time, will facilitate obtaining exceedingly fine adjustments of the feeding mechanism which is required in the very short stitch length settings and will also hold the stitch length setting when sewing with a long stitch length on heavy fabric.
  • Fig. 1 is a fragmentary front elevational view of a sewing machine embodying the present invention.
  • Fig. 2 is a vertical sectional view taken substantially on the line 2-2 of Fig. 1.
  • Fig. 3 is a sectional view taken substantially on the line 3-3 of Fig. 2.
  • Fig. 4 is a view similar to Fig. 2 but illustrating the parts in a difierent position.
  • Fig. 5 is a sectional view taken substantially on the line 5--5 of Fig. 3.
  • the feed ing mechanism of the machine is of a well-known construction comprising a feed-advance pitman 3' arranged vertically in the standard 1 and having a fork 4 at its upper end.
  • the fork 4 embraces an eccentric 5 on the main shaft 6 which is journaled longitudinally in the bracket-arm 2. It is the endwise motion of the pitman 3 that determines the feed-advance motion of the feed stroke.
  • endwise motion is imparted to the pitman by an adjustable mechanism including a pivot block 7 pivoted to the standard 1 by a pivot screw 8 and having a guide channel or slideway 9 in which is slidably mounted a slide block it! pivotally secured to the pitman 3 by a screw 11.
  • the amount of the endwise motion imparted to the pitman 3 depends upon the orientation of the guide channel 9 with respect to the center of oscillation of the pitman, which is at its lower end.
  • the pivot block 7 is manually adjusted about its pivot 8 by a stitch length adjusting lever or rod 12 secured at one in a bore in the pivot block 7 by a screw 13.
  • the other or free end of the lever 12 extends through an opening 14 in the standard 1, the opening 14 being partially closed by a stitch indicator plate secured to the standard 1 by screws 16 and having a vertically elongated slot 17 to accommodate the lever 12.
  • l-shaped concave depression 18 Adjacent to the point of zero or no-feed adjustment of the lever 12 there is provided in the plate 15 at one side of the slot 17 a l-shaped concave depression 18 having side walls or surfaces that are inclined lengthwise of the slot 17 out of the plane of the plate 15 and converge at an apex 19 that is at the zero setting of the lever 12.
  • a slot 2t? Extending axially inwardly from the free end of the lever 12 is a slot 2t? in which is slidably mounted a planar slide element 21 having a lateral finger 22 extending beyond the periphery of the lever 32 at the side adjacent to that edge of the slot 17 having the depression 18.
  • the slide element 21 has the outer end thereof threaded to cooperate with internal threads in an axial bore 23 of a thumb nut 24.
  • the nut 24 is journaled for rotation on the reduced diameter outer end of the lever 12 and is held against axial movement between a shoulder 25 on the lever 12 and a retaining screw 26 threaded into the end of the lever 12, a washer 27 being disposed between the nut 24 and screw 26.
  • the lever 12 is adapted to be moved manually along the slot 17 in the usual manner to pivot the block 7 with its channel 9, thereby varying the amount of endwise movement imparted to the pitman 3 upon oscillation of the same with the consequent variations in the feed stroke.
  • the finger 22 which is adjusted axially of the lever 12 by means of the nut 24 will cooperate with the adjacent side of the slot 17 outside the depressionl? to form an adjustable stop for limiting. the manipulation of the lever 12 and at the same time, will cooperate with indicia on the plate 15 to indicate the setting of the lever 12.
  • the stitching may be reversed for back-tacking by shifting the lever 12 to the other side of the center position and conveniently to its original position.
  • the lever 12 is moved along the slot 17 to bring the finger 22 into cooperation with the side walls of the depression 18.
  • the finger 22 is then movedaxially of the lever 12 by turningthenut 24 and with the finger cooperating with the side edge of the depression 18 in a cam-like fashion, the lever 12 will be moved a minute amount.
  • a second concave depression 28 Adjacent to the six-stitches per inch setting of the lever 12, which is the maximum obtainable stitch length, there is provided. in the plate 15 a second concave depression 28 at the same side of the slot 17 as the depression 18 and in which the finger 22 is adapted to be moved by turning the nut 24. The depression is so formed that when the finger 22 is seated therein, the lever 12 is locked against movement thus precluding the possibility that it will be forced away from this setting during the operationof the machine.
  • a block pivoted to said frame and having a channel for slidably receiving an element of an oscillating feed advance pitman and for imparting endwise motion to said pitman upon oscillation thereof, said frame having an opening, a plate for closing said opening and having an enlongatedslot arranged perpendicular to the pivot axis of said block, and tilting means for adjusting said block about its pivot to vary the endwise motion imparted to the feed-advance pitman upon oscillation thereof, said tilting means comprising a'lever secured at one end to said block and having a free end extending through the slotin.
  • said plate whereby the free end of-said lever may be manually grasped'for shifting said lever lengthwise of: the slot, said lever having a slot extending wardly from the free end thereof, a slide element arranged in, the slot in said lever for sliding movement axially of said lever; said slide element having a finger extending laterally from said lever into engagement with the adjacent side edge of' the slot, a manually rotatable member mounted for rotation upon the free end-of said lever, means for confining said rotatable member against axial movement, and cooperating threads on said rotatable member and said slide element for shifting said slide element axially of said lever upon rotation of said rotatable member, said laterally extending finger on said slide element being arranged to cooperate with the side edge of the slot in the plate adjustably to limit the pivotal movement of the lever.
  • a stitch indicator plate disposed over said opening and having a slot through which said lever extends, said slot having a side edge arranged parallel and closely adjacent to the path of travel of said adjusting lever, said plate having a first and a second concave depression in the side edge thereof, said first depression being disposed adjacent to the point on said plate corresponding to the zero stitch length setting of said lever and defining surfaces inclined lengthwise of said side edge, said second depression being disposed adjacent to the point on said plate corresponding to the maximum stitch length setting of said lever, said lever having a slot extending axially inwardly from the free endthereof, a slide element mounted in said slot and having a finger extending laterally from said lever into cooperation with said side edge of the opening and the depressions therein, a manually
  • Stitch length adjusting means for sewing machines comprising a stitch indicator plate having an elongated slot, a stitch length adjusting lever extending through the slot andadapted to be shifted along the slot in opposite directions from a center position defined by the zero stitch length setting of said lever to provide for forward and reverse settings and to vary the setting from zero to a maximum as said lever is moved away from said center position, said plate having a side edge adjacent to said slot arranged parallel and closely adjacent to the path of travel of said lever, a finger extending laterally from said lever for engaging said side edge, and means for manually shifting said finger axially of said lever, said plate at the portion adjacent to said side edge being substantially planar with a concave V-shaped depression formed therein in the area immediately adjacent to the zero stitch length setting of said lever with the base of said depression at the Zero stitch length setting and presenting inclined surfaces lengthwise of the slot, said laterally extending finger being arrangedto cooperate with the planar portion of said plate adjacent to said side edge in the range of normal stitch lengths and with the inclined edges of said depression in the
  • a block pivoted to said frame and having a channel for slidably receiving an element of an oscillating feed advance pitman and for imparting endwise motion to said pitman upon oscillation thereof relatively to said block with the endwise motion imparted to said pitman being variable between zero and a maximum upon pivotal movement of said block
  • said frame having an opening, a plate, for closing said opening and having an elongated slot including a side edge arranged perpendicular to the pivot axis of said block, tilting means for adjusting said block about its pivot axis comprising a lever secured at one end to said block and having a free end extending through the slot in said plate whereby the free end of said lever may be manually grasped for shifting said lever lengthwise of said slot, a finger slidably mounted on the free end of said lever for movement axially thereof and extending laterally from said lever for cooperating with the side edge of said slot to limit the pivotal movement of said lever, and means for moving said finger

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US716696A 1956-01-30 1958-02-21 Stitch length adjusting means for sewing machines Expired - Lifetime US2970556A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
BE554471D BE554471A (enrdf_load_stackoverflow) 1956-01-30
GB39/57A GB802464A (en) 1956-01-30 1957-01-01 Stitch-length adjusting mechanism for sewing machines
CH351485D CH351485A (de) 1956-01-30 1957-01-18 Stichlängen-Stelleinrichtung in einer Nähmaschine
FR1170243D FR1170243A (fr) 1956-01-30 1957-01-23 Mécanisme de réglage de la longueur des points pour machine à coudre
US716696A US2970556A (en) 1956-01-30 1958-02-21 Stitch length adjusting means for sewing machines
GB18790/58A GB888606A (en) 1956-01-30 1958-06-12 Stitch length adjusting means for sewing machines
FR776334A FR74489E (fr) 1956-01-30 1958-10-09 Mécanisme de réglage de la longueur des points pour machine à coudre
DE1959S0029336 DE1791072U (de) 1958-02-21 1959-01-09 Stichlaengen-stelleinrichtung fuer naehmaschinen.
CH6848959A CH368695A (de) 1956-01-30 1959-01-19 Stichlängen-Stelleinrichtung in einer Nähmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US351485XA 1956-01-30 1956-01-30
US716696A US2970556A (en) 1956-01-30 1958-02-21 Stitch length adjusting means for sewing machines

Publications (1)

Publication Number Publication Date
US2970556A true US2970556A (en) 1961-02-07

Family

ID=26711812

Family Applications (1)

Application Number Title Priority Date Filing Date
US716696A Expired - Lifetime US2970556A (en) 1956-01-30 1958-02-21 Stitch length adjusting means for sewing machines

Country Status (5)

Country Link
US (1) US2970556A (enrdf_load_stackoverflow)
BE (1) BE554471A (enrdf_load_stackoverflow)
CH (2) CH351485A (enrdf_load_stackoverflow)
FR (1) FR1170243A (enrdf_load_stackoverflow)
GB (2) GB802464A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467040A (en) * 1967-10-12 1969-09-16 Singer Co Backup stitch mechanisms
US4398482A (en) * 1981-09-23 1983-08-16 The Singer Company Stitch length stops for industrial sewing machine
US4444142A (en) * 1981-05-29 1984-04-24 Dorina Nahmaschinen Gmbh Sewing machine control assembly for adjusting stitch length
US20090269255A1 (en) * 2008-04-23 2009-10-29 Ibiben Co., Ltd. Holding sealing material, method for manufacturing holding sealing material, and exhaust gas purifying apparatus
US20090269254A1 (en) * 2008-04-23 2009-10-29 Ibiden Co., Ltd. Holding sealing material, method for manufacturing holding sealing material, and exhaust gas purifying apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397071A (en) * 1917-11-05 1921-11-15 Singer Mfg Co Feeding mechanism for sewing-machines
DE634748C (de) * 1936-09-02 Phoenix Naehmaschinen Akt Ges Stichstelleinrichtung fuer Naehmaschinen
DE634711C (de) * 1936-09-02 Wilhelm Renters Naehmaschine mit Einrichtungen zum Stichverstellen und Versenken des Stoffschiebers
DE697934C (de) * 1939-03-08 1940-10-28 Wilhelm Renters Vorrichtung zum Einstellen der Stichbreite von Zickzacknaehmaschinen
DE732820C (de) * 1941-04-20 1943-03-12 Hermann Koehler Ag Stichstellvorrichtung fuer Naehmaschinen
US2525578A (en) * 1946-01-22 1950-10-10 Austlid Arnljot Stitch-length control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE634748C (de) * 1936-09-02 Phoenix Naehmaschinen Akt Ges Stichstelleinrichtung fuer Naehmaschinen
DE634711C (de) * 1936-09-02 Wilhelm Renters Naehmaschine mit Einrichtungen zum Stichverstellen und Versenken des Stoffschiebers
US1397071A (en) * 1917-11-05 1921-11-15 Singer Mfg Co Feeding mechanism for sewing-machines
DE697934C (de) * 1939-03-08 1940-10-28 Wilhelm Renters Vorrichtung zum Einstellen der Stichbreite von Zickzacknaehmaschinen
DE732820C (de) * 1941-04-20 1943-03-12 Hermann Koehler Ag Stichstellvorrichtung fuer Naehmaschinen
US2525578A (en) * 1946-01-22 1950-10-10 Austlid Arnljot Stitch-length control

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467040A (en) * 1967-10-12 1969-09-16 Singer Co Backup stitch mechanisms
US4444142A (en) * 1981-05-29 1984-04-24 Dorina Nahmaschinen Gmbh Sewing machine control assembly for adjusting stitch length
US4398482A (en) * 1981-09-23 1983-08-16 The Singer Company Stitch length stops for industrial sewing machine
US20090269255A1 (en) * 2008-04-23 2009-10-29 Ibiben Co., Ltd. Holding sealing material, method for manufacturing holding sealing material, and exhaust gas purifying apparatus
US20090269254A1 (en) * 2008-04-23 2009-10-29 Ibiden Co., Ltd. Holding sealing material, method for manufacturing holding sealing material, and exhaust gas purifying apparatus
US8268255B2 (en) * 2008-04-23 2012-09-18 Ibiden Co., Ltd. Holding sealing material, method for manufacturing holding sealing material, and exhaust gas purifying apparatus
US8268256B2 (en) * 2008-04-23 2012-09-18 Ibiden Co., Ltd. Holding sealing material, method for manufacturing holding sealing material, and exhaust gas purifying apparatus

Also Published As

Publication number Publication date
GB888606A (en) 1962-01-31
CH351485A (de) 1961-01-15
BE554471A (enrdf_load_stackoverflow)
CH368695A (de) 1963-04-15
GB802464A (en) 1958-10-08
FR1170243A (fr) 1959-01-12

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