US3149592A - Regulating mechanism for a sewing machine - Google Patents

Regulating mechanism for a sewing machine Download PDF

Info

Publication number
US3149592A
US3149592A US262454A US26245463A US3149592A US 3149592 A US3149592 A US 3149592A US 262454 A US262454 A US 262454A US 26245463 A US26245463 A US 26245463A US 3149592 A US3149592 A US 3149592A
Authority
US
United States
Prior art keywords
cam
rod
lever
feeler
control
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
US262454A
Other languages
English (en)
Inventor
Robert Ramon Casas
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 US3149592A publication Critical patent/US3149592A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates
    • 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

  • Such a regulating mechanism is of the type which comprises a control rod for a feeder device for moving the pieces to be sewn, adapted to occupy diverse angular positions each determining a particular stitch length, a control member permitting manual actuation on an actuating lever of the rod, this same control member permitting the interlocking of an automatic control device forthe variation in length of stitch, comprising a rotatable cam followed by a feeler carried by one end of a return lever, the other end of which is pivoted to a slider carried by the rod, this return lever being pivoted on a support lever oscillating with respect to the frame of the machine, the control member being adapted to operate on the support lever.
  • control mechanism for the stitch length is characterized by the fact that the control member is a rotatable knob secured to a shaft carrying a cam adapted to co-operate successively in accordance with its angular position with two feelers, one carried by the end of the actuating lever of the rod and the other by the end of the support lever, the part of the profile of the cam operating on the support lever presenting a ramp in such a manner as to permit a correction adjustment of the interlocking position of the automatic control device.
  • FIGURE 1 is an elevation of the mechanism constructed in accordance with the invention
  • FIGURE 2 is an elevation of the same mechanism at right angle to the view shown in FIGURE 1;
  • FIGURE 3 is a corresponding plan
  • FIGURE 4 is a plan of the mechanism showing the position which the mechanism occupies after automatic control of the variations in stitch length;
  • FIGURE 5 is a detail of a control cam for the momentary back movements.
  • FIGURE 6 is a developed view of a control cam for a stable stitch length regulation.
  • control mechanism shown in the annexed drawings is adapted more especially for use with a sewing machine of the type described in the specifications of the US. Patents No. 2,682,845 and No. 2,647,481.
  • the feeder device for moving the pieces of material to be sewn is operated from a motor actuating the whole machine mechanism and the amplitude and the direction of movement of this feeder device is controlled by the intermediary of a vertical rod 1.
  • this red 1 corresponds to a forward or backward movement of the feeder for moving the pieces to be sewn. Only the mechanism adapted to give the rod 1 its diverse positions have been shown in the drawings, the rest of the material feeder device is of known construction.
  • This control rod 1 which is axially fixed, is guided in bearings provided in a frame 2 of the sewing machine.
  • the rod 1 is normally returned by a spring in an anticlockwise direction with reference to FIG. 3.
  • this rod 1 carries an actuating lever 3 freely engaged "ice around the rod 1.
  • a pin 4 is radially engaged in the rod 1 and is adapted to serve as abutment means for a pin 5 secured to the actuating lever 3.
  • a coil spring 6 is engaged around the rod 1.
  • This coil spring 6 is hooked by its ends '7 to a radial pin 8 secured to the rod 1. The other end 9 of the spring 6 leans against the actuating lever 3 and tends to maintain the pin 5 thereof in contact With the pin 4.
  • the actuating lever 3 carries a feeler 10 at its end constituted by head of a screw 11 screwed in a tapped bore 12 of the actuating lever 3.
  • This feeler 10 can thus be regulated in position after mounting, its definite position being ensured by a nut 13.
  • This feeler 10 is adapted to co-operate with the profile of a cam 14 secured to a shaft 15, transversely guided in the frame 2 of the machine.
  • a rotatable control knob 16 is fixed on the outer end of this shaft 15.
  • the pro-file of the cam 14 shown in the developed view in FIGURE 6 comprises four distinct working zones:
  • Zone I is adapted to control the length of stitches in a reverse direction from a maximum amplitude (4) to azero amplitude (0).
  • Zone ll of this profile which has a smaller inclination than that of zone I is adapted to control the length of stitches from an amplitude (0) to a determined unit amplitude (+1).
  • Zone III the profile of the cam 14 controls the stitch length of this unit amplitude (+1) to a maximum forward amplitude (+4).
  • FIGURES 1 to 3 of the drawings show the feeler lil when it occupies the position A on zone III of the cam 14 precisely.
  • the inclination of the profile is practically similar to that of zone I.
  • the inclination of zone II which is less than that of zones I and III, permit the extension of the field of adjustment between the amplitude zero (0) and the unit forward amplitude (+1).
  • Zone IV of the profile of the cam 14 is adapted to interlock the automatic control device for varying the stitch length.
  • This automatic control device for varying the stitch length is of the same type as that described in the specification of the above-mentioned US. Patent No. 2,682,845.
  • the machine described in this patent specification comprises a vertical shaft 17 guided in bearings made in the frame 2 of the machine and is continuously rotated from the main shaft of the sewing machine.
  • This vertical shaft 17 is adapted to receive control cams, of which especially a cam 18, the profile of which controls, in the course of functioning the machine, diverse variations of direction and amplitude of the feeder device for moving the pieces of material to be sewn.
  • This cam 18 is adapted to operate on a feeler 19 carried by one end of a return lever 20, the other end of which is pivoted by an axle 21 to a slider 22.
  • This slider 22 can effect a reciprocating movement in a slide 23 carried by the upper end of the control rod 1.
  • the return lever 20 is oscillatingly mounted, on an axle 24 on a support lever 25.
  • the support lever 25 is itself pivoted by its end 26 on an axle 27 carried by the frame 2 of the machine.
  • the other end 28 of the support lever 25 carries the feeler 29 formed by the head of a screw 39, engaged in a tapped bore 31 of the end 28.
  • This feeler 29 is thus regulatable in position after mounting, its definite position being ensured by a nut 32.
  • a spring 43 hooked to the frame 2 and t0 the support lever 25, tends to maintain the feeier 29 in contact with the cam 14.
  • the profile of zone IV of the cam 14 oscillates the support lever 25 to bring it from the position shown in FIGURE 3 into the position shown in FIGURE 4.
  • the feeler 19 enters into contact with the profile of the cam 18 and can follow it.
  • the movements given to the feeler 19 by the cam 18 are transmitted by the return lever 20 to the slider 22 and thus, to the slide 23 secured to the control lever 11.
  • Different angular positions are given to this rod 1, positions which depend on the profile of the cam 18 and give all dcsired'variations in stitch length in forward or reverse movement.
  • Zone IV of the profile of the cam 14 is the form of a ramp so as to permit a correction regulation in the automatic control position, such regulation may be necessary in accordance with differences due to the tolerances of manufacture existing in the different cams 18 adapted to be engaged on the vertical shaft 17.
  • This control mechanism for the stitch length comprises moreover a second manual control member 33, permitting by pressure thereon, the control of momentary reverse movements of the feeder device from an amplitude equal to that given in the forward direction by the regulating knob 16 and the cam 14, when the feeler 19 is in contact with zones II and III of this cam.
  • the second control member 33 is formed by a driving lever 34 pivoted by an axle 35 on the frame 2 of the machine.
  • This lever 34 presents three arms, the first of which forms the control member 33.
  • One end 37 of a second arm 36 is adapted to operate on the pin 8.
  • One end 39, of the third arm 38 is adapted to lean against the profile 40 of a cam ll secured, as is the cam 14, on the shaft 15 controlled by the knob 15.
  • the control knob 16 is regulated for a determined stitch length in forward movement
  • the user of the machine desires momentarily to prick stitches in reverse without de-regulating the knob 16, it surfices to exert a pressure on the second control member 33 to tip it up until end 39 abuts against the profile tl of the cam 41.
  • the end 37 displaces the control rod ll angularly in moving the pin 8. This angular movement of the rod 1 is rendered possible as the feeler ll) leans against the cam 14 due to a resilient coupling by the spring 6 of the actuating lever 3 of the rod 1.
  • the profile 40 of the cam 41 presents a circular zone 42 radially remote from the shaft 15 by a distance sufficient to push back the end 39 and maintain the end 37 of the lever 34 out of contact with the pin 8 when the knob 16 is regulated for automatic control of the variation in stitch length.
  • mechanism 33 remains immobile during the functioning of the machine when the feeder device is controlled from the cam 18.
  • control (c) Interlocking of the automatic control devicefor the variation in stitch length in forward or reverse movement by turning of the control knobs 16, so as to bring the feeler 29 into contact with the zone IV of the cam 14.
  • Thechoice of point of contact of the feeler 29 and of the ramp forming the zone IV by angular displacement of the knob 16 permits the effecting of correction adjustment to' compensate the differences in dimensions which can exist between certain cams 18.
  • this conrol mechanism can moreover effect:
  • cams l4 and 41 which are formed on two distinct pieces in the embodiment shown in the drawing could also be combined in a single cam having two profiles.
  • a mechanism for regulating the stitch length in a sewing machine comprising a frame, a control rod for a feeder device adapted to move pieces of material to be sewn mounted on said frame, said control rod being adapted to occupy diverse angular positions each determining a particular stitch length, an actuating lever mounted on said rod, a feeler carried by said actuating lever, a shaft having an inner end and an outer end, guided in said frame member, a cam mounted on said inner end of said shaft and a manually rotatable control knob mounted at the outer end of said shaft, an axle carried by said frame, a support lever pivoted to said axle, a feeler carried by said support lever, a return lever pivotally connected to said support lever oscillating with respect to said frame, a feeler carried by said return lever which is pivoted to a slider carried by a slide which is secured to said rod, said feeler carried by said return lever being actuated by a rotatable cam for controlling the variation of direction and amplitude of said feeder device for moving the pieces of
  • a driving lever is pivotally connected to said frame, and permits by pressure thereon, the control of the momentary reverse movement of the feeder device for moving the material to be sewn, by an amplitude equal to that given to it in forward movement by said control knob, a second cam secured to said shaft carrying said control knob, said driving lever presenting a part adapted to operate on a lateral projection of said rod to move said rod angularly, and another part adapted to lean against said 7 second cam limiting the angular movement of said drivmg lever and thus of said rod, said actuating lever be-' ing coupled to said control knobby resilient means permittingan angular displacement'between said actuating lever and said rod during the working of said driving lever;
  • abutment means provided on said rod and on said actuating lever determining the Working position thereof on said rod.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US262454A 1962-03-07 1963-03-04 Regulating mechanism for a sewing machine Expired - Lifetime US3149592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH281262A CH375207A (fr) 1962-03-07 1962-03-07 Mécanisme de réglage pour machine à coudre

Publications (1)

Publication Number Publication Date
US3149592A true US3149592A (en) 1964-09-22

Family

ID=4242137

Family Applications (1)

Application Number Title Priority Date Filing Date
US262454A Expired - Lifetime US3149592A (en) 1962-03-07 1963-03-04 Regulating mechanism for a sewing machine

Country Status (8)

Country Link
US (1) US3149592A (ru)
AT (1) AT241950B (ru)
BE (1) BE628597A (ru)
CH (1) CH375207A (ru)
DE (1) DE1485218A1 (ru)
ES (1) ES285777A1 (ru)
GB (1) GB957497A (ru)
NL (1) NL140907B (ru)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383771A (en) * 1967-04-05 1968-05-21 Theodore Alteneder And Sons Calibration means for a measuring rule
US4135632A (en) * 1977-04-28 1979-01-23 Caterpillar Tractor Co. Load indicators for construction vehicles
US4145983A (en) * 1978-06-26 1979-03-27 The Singer Company Feed regulating mechanism for a sewing machine
US4170184A (en) * 1976-12-28 1979-10-09 Mefina S.A. Mechanism for the adjustment of the direction and of the amplitude of the movement of the transporting claw for material to be sewn on a sewing machine
US4399936A (en) * 1981-10-26 1983-08-23 International Business Machines Corp. Pantocam web threading apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3383771A (en) * 1967-04-05 1968-05-21 Theodore Alteneder And Sons Calibration means for a measuring rule
US4170184A (en) * 1976-12-28 1979-10-09 Mefina S.A. Mechanism for the adjustment of the direction and of the amplitude of the movement of the transporting claw for material to be sewn on a sewing machine
US4135632A (en) * 1977-04-28 1979-01-23 Caterpillar Tractor Co. Load indicators for construction vehicles
US4145983A (en) * 1978-06-26 1979-03-27 The Singer Company Feed regulating mechanism for a sewing machine
US4399936A (en) * 1981-10-26 1983-08-23 International Business Machines Corp. Pantocam web threading apparatus

Also Published As

Publication number Publication date
BE628597A (ru)
DE1485218A1 (de) 1969-06-04
GB957497A (en) 1964-05-06
AT241950B (de) 1965-08-25
ES285777A1 (es) 1963-08-01
CH375207A (fr) 1964-02-15
NL140907B (nl) 1974-01-15

Similar Documents

Publication Publication Date Title
US2854935A (en) Automatic shifting mechanism for sewing machines adapted for embroidery work
US4712390A (en) Circular knitting machine incorporating a stitch density adjuster device
US3149592A (en) Regulating mechanism for a sewing machine
GB911338A (en) Improvements in or relating to sewing machines
US3460496A (en) Zigzag sewing machine with control means for producing buttonholes
US3177835A (en) Automatic pattern zigzag sewing machine
JPS6330392Y2 (ru)
US3067702A (en) Automatic and hand-operated apparatus for use in rotary type zigzag sewing machines
US3130697A (en) Control system for zig-zag sewing machines
US3522781A (en) Sewing machine
US3635179A (en) Zigzag sewing machine for producing closed sewing patterns, particularly buttonholes
US2119492A (en) Feed mechanism for sewing machines
US3426712A (en) Feed control apparatus for a sewing machine
US3034462A (en) Ornamental stitch sewing machine
US3518954A (en) Round end buttonhole mechanism for zigzag sewing machines
GB792784A (en) Zig-zag sewing machine for making diverse fancy seams
US3108556A (en) Zig-zag sewing machines
US3426711A (en) Automatic zigzag sewing machine
GB1295237A (ru)
US4106419A (en) Sewing machine
US3131658A (en) Device for uniform regulation of forward and reverse stitches in automatic button hole stitching by means of a zigzag sewing machine
US3085526A (en) Sititch pattern control means for zigzag sewing machine
US3022756A (en) Mechanism for adjusting the length of stitch on a sewing machine
US3053206A (en) Sewing machines having ornamental stitch devices
US3064602A (en) Zigzag sewing apparatus in sewing machines