US3156205A - Sewing machine mechanism for decorative stitching - Google Patents

Sewing machine mechanism for decorative stitching Download PDF

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Publication number
US3156205A
US3156205A US275018A US27501863A US3156205A US 3156205 A US3156205 A US 3156205A US 275018 A US275018 A US 275018A US 27501863 A US27501863 A US 27501863A US 3156205 A US3156205 A US 3156205A
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US
United States
Prior art keywords
rocker
follower
shaft
cam
housing
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
US275018A
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English (en)
Inventor
Reeber Rudolf
Dobner Reinhold
Schafer Rudolf
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GM Pfaff AG
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GM Pfaff 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 GM Pfaff AG filed Critical GM Pfaff AG
Application granted granted Critical
Publication of US3156205A publication Critical patent/US3156205A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Program-controlled sewing machines
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20207—Multiple controlling elements for single controlled element
    • Y10T74/20238—Interlocked

Definitions

  • the present invention relates to sewing machines and is particularly concerned with mechanism for controlling decorative stitching operations.
  • the invention concernes a mechanism or assembly for sewing machines adapted for sewing fancy or decorative patterns.
  • Such mechanism comprises a plurality of pattern cam disks mounted on a stationary shaft and an equal number of cam followers journalled equi-axially on a spring loaded rocker as well as a selector or setting device for establishing an operative connection between the rocker and one of the cam disks by way of the follower associated therewith.
  • this is accomplished in that the scanning end of each follower is secured to the rocker by a leaf spring which yields perpendicularly to the movement of the rocker and is movable radially and axially by means of an operating member associated with the selecting means.
  • each operating member has a switch element having two key surfaces that are disposed to exert forces displaced at angles of 90 with respect to one another, one of which cooperates with the scanning end or scanning member and the other with an abutment which is firmly connected with the scanning end or member and extends perpendicularly to the plane in which it rocks.
  • FIG. 1 is an overall view, partly in section, of a sewing machine equipped with the new decorative stitching y Asshown in FIG. 1 the mechanism for sewing decorative stitches is accommodated in the machine arm which,
  • a needle bar guide or oscillator 2 in a known manner has a needle bar guide or oscillator 2, the lateral movements of which are effected by a bifurcated lever 3.
  • the driving of the lever 3 is accomplished in a known manner by a triangular cam 5 which is operatively connected to the arm shaft 4 of the machine (see also FIG. 3).
  • the bifurcated lever 3 is caused to oscillate about the joint 6 by means of which it is connected to the needle bar oscillator.
  • the magnitude of the overstitch or stitch width and the stitch location are determined by a slide member 7 in which a slide block 8 is slidingly received.
  • the angular position of the slide member 7 determines the magnitude of the transverse stitches while the lateral position of the shaft 9 which is rigidly connected with the slide portion 7 determines the stitch location.
  • the change in the position of the shaft 9 necessary for changing the stitch location is effected by a double armed lever 10 (FIG. 1) which is journalled in a stud 11 secured in the housing of the sewing machine.
  • An arm 12 of the lever 1li encompasses the shaft 9 while the other arm 13 operates the decorative stitch mechanism by way of a link 14.
  • a stitch setting device of known construction is arranged in the standard of the machine, the slide 15 of which is connected by way of a bar 16 with a setting mechanism 17 while a spring 18 pulls the slide 15 positively inforward direction in the position determined by the setting mechanism 17.
  • the slide 15 is adjustable by way of the setting mechanism 17 not only by hand but also automatically by way of the decorative stitching mechanism, particularly by way of a link 19, a double armed lever 21 journalled in the housing by means of a stud 20, a connecting bar 22 and an angular lever 23 which is likewise journalled in the housing of the machine by means of a stud 24. Under these conditions the free end 25 of the angular lever 23 rests against the slide 15.
  • the decorative stitching mechanism has a'plurality of pattern cam disks 27 which are secured to a cam shaft 26 rotatably journalled on av support 27a in the housing of the machine and are separated by gaps from one another.
  • AThe drive of the shaft is effected from the arm shaft 4 by way of a worm gear 28 which cooperates with a corresponding gear 29 on the shaft 26.
  • shafts 3l) and 31 are journalled (FIG. 1) each of which carries a rocker 32 or 33 and the arms of which are each connected with an abutment 34 or 35 respectively.
  • a pull spring 36 is fastened at one end to an arm of the rocker 32 and at the other end to the opposite arm of the rocker 33.
  • the rocker 32 supports a series of followers 37 and the rocker 33 a series of followers 38.
  • the followers 37 and 38 consist of leaf springs 40 provided with the scanning or follower ends 39 which are secured in the rockers 32 or 33 in such a manner that the scanning ends 39 can normally move in the free space laterally of vtheir appertaining pattern cam disks 27.
  • the scanning ends 39 of the followers 37 normally rest with their back ends against the abutment 34Y of the rocker 32 and the scanning ends 39 of the followers 38 against the abutment 35 of the rocker 33.
  • a switching member 41 is provided for each follower 37 and a switching member 42 for each follower 38.
  • the switching members 41, 42 has a bar 43 that extends through the wall of the support 27a in the housing and which carries at its outwardly extending end a push button 44 and at its inner end an angularly offset switching member 45.
  • the center portion of the switch member 45 defines a key 46 which is inclined in a direction to engage and move the scanning end 39 with which it is associated against the bias of spring 40.
  • the switching member 45 is provided at the lower end with a key surface 47 which is directed in the switch members 41 against the abutment 34 and in the switch members 42 against the abutment 35.
  • the switch member 45 presents a retaining surface 48 which is disposed perpendicularly to the direction of movement of the switch member 41 or 42 and across which the abutment 34, respectively can move when the switch member is depressed.
  • the effective operating force of the key 46 is disposed at an angle of 90 with respect to the force exerted by the key surface 47.
  • switch members 41 and 42 In each row of the switch members 41 and 42 a further switch member 49 is provided which corresponds to the switch members 41 and 42 except for the switch members 45.
  • switch elements 5G In the switch members 49 switch elements 5G are mounted which merely have key surfaces 51 directed against the abutment 34 or 35 of the rockers 32 or 33 respectively.
  • a pressure spring 52 is arranged on each of the rods 43 which raises the switch members 41, 42 and 49 into their inoperative position. The upward movement of the bars 43 is limited by abutment pins 53.
  • the link 19 which is connected with the mechanism for changing the stitch length is linked to the abutment 34 of the rocker 32 while link 14 is pivotally connected with the abutment 35 of the rocker 33 which is connected with the slide 7 by way of a double armed lever 1G.
  • the mechanism operates as follows:
  • the abutment 34 under the effect of pull spring 36 places itself above the retaining surface 48 of the switch member 45 and prevents its upward movement against the effect of the pressure spring 52.
  • the lateral surface of the switch member forms a sliding guide for the scanning end 39 which moves to and fro as the pattern cam disk 27 rotates.
  • the Switch element 45 acts in an analogous manner with respect to the corresponding scanning finger 33 and the abutment 35 of the rocker 33.
  • the followers 37 of the rocker 32 that are made operative at any time transmit the impulses scanned from the pattern cam disks 27 by way of the link 19, the two armed lever 21, the connecting bar 22 and the angular lever 23 to the slide 15 for setting the stitch length.
  • the followers 38 of the rocker 33 transmit the impulses by way of the link 14 and the two armed lever 10 to the slide 7 for swinging the needle bar oscillator.V
  • Mechanism for sewing decorative stitching on a sewing machine having a machine housing and a drive shaft, said mechanism comprising a support arranged in said housing in fixed position proximate said drive shaft, a cam shaft journalled on said support in driving engagement with said drive shaft, a plurality of pattern cam disks mounted on said cam shaft, a spring loaded rocker disposed proximate and extending parallel to said cam shaft, said rocker including an abutment member, a plurality of followers corresponding in number to the number of said disks and mounted in alignment on said rocker, a switch member for each said follower mounted on said support in said housing for movement into engagement with its respective said follower and operative selectively to move a follower to establish connection between the rocker and one said pattern cam disk, each said follower having a leaf spring secured at one end to said rocker and presenting a scanning end proximate one said disk and each said follower yielding resiliently in a direction generally parallel to said shaft and being movable angularly and axially in response to movement
  • Mechanism for sewing decorative stitching on a sewing machine having a machine housing and a drive shaft, said mechanism comprising a support arranged in said housing in fixed position proximate said drive shaft, a cam shaft journalled on said support in driving engagement with said drive shaft, a plurality of pattern cam disks mounted on said cam shaft, a spring loaded rocker disposed proximate and extending parallel to said cam shaft, said rocker including an abutment.
  • each said follower mounted on said support in said housing for movement into engagement with its respective said follower and operative selectively to move a follower to establish connection between the rocker and one said pattern cam disk
  • each said follower having a leaf spring secured at one end to said rocker and presenting a scanning end proximate one said disk and each said follower yielding resiliently in a direction generally parallel to said shaft and being movable angularly yand axially in response to movement of its associated switch member
  • each said switch member having a switch element presenting a pair of key surfaces disposed to exert forces displaced at an angle of relative to one another one of which engages said scanning end and the other said abutment, and said abutment being connected firmly with said scanning end and extending perpendicularly to the rocking plane thereof.
  • Mechanism for sewing decorative stitching on a sewing machine having a machine housing and a drive shaft, said mechanism comprising a support arranged in said housing in fixed position proximate said drive shaft, a cam shaft journalled on said support in driving engagement with said drive shaft, a plurality of pattern cam disks mounted on said cam shaft, a spring loaded rocker disposed proximate and extending parallel to said cam shaft, said rocker including an abutment member, a plurality of followers corresponding in number to the number of said disks and mounted in alignment on said rocker, a switch member for each said follower mounted on said support in said housing for movement into engagement with its respective said follower and operative selectively to move a follower to establish connection between the rocker and one said pattern cam disk, each said follower having a lear spring secured at one end to said rocker and presenting a scanning end proximate one said disk and each said follower yielding resiliently in a direction generally parallel to said shaft and being movable angularly and axially in response to movement of
  • each said switch member having a switch element presenting a pair of key surfaces disposed to exert forces displaced at an angle of 90 relative to one another one of which engages said scanning end and the other said abutment, said abutment being connected firmly with said scanning end and extending perpendicularly to the rocking plane thereof, and said switch element having a retaining surface at the upper end of said other key surface extending perpendicularly to the direction of movement of said switch member.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US275018A 1962-04-26 1963-04-23 Sewing machine mechanism for decorative stitching Expired - Lifetime US3156205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0029253 1962-04-26

Publications (1)

Publication Number Publication Date
US3156205A true US3156205A (en) 1964-11-10

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ID=7371488

Family Applications (1)

Application Number Title Priority Date Filing Date
US275018A Expired - Lifetime US3156205A (en) 1962-04-26 1963-04-23 Sewing machine mechanism for decorative stitching

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US (1) US3156205A (de)
CH (1) CH400737A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009107A3 (en) * 1978-09-14 1980-06-25 Dorina Nahmaschinen Gmbh Zigzag sewing machine with a device for producing decorative stitches
US4441440A (en) * 1982-12-14 1984-04-10 The Singer Company Push-button control module for a sewing machine
US4442784A (en) * 1982-12-14 1984-04-17 The Singer Company Vertically stacked components in a control module for a sewing machine
US4612821A (en) * 1983-01-28 1986-09-23 The Singer Company Spring system for push-button control in a sewing machine
US4869124A (en) * 1986-04-04 1989-09-26 Canadiana Outdoor Products Inc. Control system for apparatus
RU2245948C1 (ru) * 2004-01-08 2005-02-10 Открытое акционерное общество "Завод им. В.А. Дегтярёва" Механизм отклонения ведомого звена, например, рамки игловодителя

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2316776A (en) * 1940-09-21 1943-04-20 Harold F Elliott Electrical control apparatus
US3085526A (en) * 1960-01-19 1963-04-16 Riccar Sewing Machine Co Ltd Sititch pattern control means for zigzag sewing machine
US3094086A (en) * 1960-01-05 1963-06-18 Gritzner Kayser Ag Control mechanism for zig-zag sewing machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2316776A (en) * 1940-09-21 1943-04-20 Harold F Elliott Electrical control apparatus
US3094086A (en) * 1960-01-05 1963-06-18 Gritzner Kayser Ag Control mechanism for zig-zag sewing machines
US3085526A (en) * 1960-01-19 1963-04-16 Riccar Sewing Machine Co Ltd Sititch pattern control means for zigzag sewing machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0009107A3 (en) * 1978-09-14 1980-06-25 Dorina Nahmaschinen Gmbh Zigzag sewing machine with a device for producing decorative stitches
US4441440A (en) * 1982-12-14 1984-04-10 The Singer Company Push-button control module for a sewing machine
US4442784A (en) * 1982-12-14 1984-04-17 The Singer Company Vertically stacked components in a control module for a sewing machine
US4612821A (en) * 1983-01-28 1986-09-23 The Singer Company Spring system for push-button control in a sewing machine
US4869124A (en) * 1986-04-04 1989-09-26 Canadiana Outdoor Products Inc. Control system for apparatus
RU2245948C1 (ru) * 2004-01-08 2005-02-10 Открытое акционерное общество "Завод им. В.А. Дегтярёва" Механизм отклонения ведомого звена, например, рамки игловодителя

Also Published As

Publication number Publication date
CH400737A (de) 1965-10-15

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