GB863220A - Improvements in or relating to button clamps for sewing machines - Google Patents

Improvements in or relating to button clamps for sewing machines

Info

Publication number
GB863220A
GB863220A GB23/58A GB2358A GB863220A GB 863220 A GB863220 A GB 863220A GB 23/58 A GB23/58 A GB 23/58A GB 2358 A GB2358 A GB 2358A GB 863220 A GB863220 A GB 863220A
Authority
GB
United Kingdom
Prior art keywords
lever
clamp
arm
abutment
pin
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
Application number
GB23/58A
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.)
GM Pfaff AG
Original Assignee
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
Publication of GB863220A publication Critical patent/GB863220A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/12—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing
    • D05B3/14—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing perforated or press buttons
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

863,220. Sewing machines. PFAFF A. G., G. M. Jan, 1, 1958 [Jan. 22, 1957], No. 23/58. Class 112 In a button sewing machine an abutment, disposed in the path of movement of a button clamp-opening lever, is held in a locked position by means of a toggle joint. The movable jaws of a button clamp 19, pivoted at 35, are opened against the action of a spring 34 by the movement of a pin 37 carried by a slidable clamp-opening bar 36. Pin 37 is embraced by one arm of a bell crank lever 40 pivoted at 38 to the button clamp. A stud 43, carried by the other arm of lever 40 engages a normally fixed abutment 47 when the button clamp is raised, whereby pin 37 is shifted to open the jaws. Abutment 47 is pivoted at 53 to a bracket 46 fixed by screws 45 to the machine frame, and is also connected by a pair of toggle links 48, 51 to bracket 46. A short link 48 abuts a stud 56, carried by abutment 47, in the over-centre position of the links. The longer link 51 is rigid with a lever arm 54. The armature 58 of an electromagnet 57 is normally held retracted by a spring 59, but is projected, when the electromagnet is energized, to rock lever arm 54 and thereby to break the toggle joint. If the button clamp is then lifted, stud 43 will rock the abutment about its pivot 53, and the clamp remains closed. When the electromagnet is de-energized, the weight of the abutment, assisted by a spring 60 at the pivot 53, carries the toggle links to their over-centre position. A bracket 29 on the button clamp carries a stud 28 disposed in a slot in a horizontal, clamp-lifting bar 18. The latter is fixed to a vertical bar 9 biased downwardly by a spring 27. A bar 20 projecting from bar 9 carries a pin 26. A lever 62 fulcrummed at 63 has one arm disposed under pin 26 and biased downwardly by a spring 75. The other arm of lever 62 is connected by a chain 67 to a treadle, operation of which serves to lift the button clamp. A lever 69, pivoted at 70, is connected by a link 73 to the starting lever 13 of the machine, whereby, when the latter operates, a notch 71 in lever 69 is positioned below a pin 68 on said other arm of lever 62, to prevent the raising of the button clamp.
GB23/58A 1957-01-22 1958-01-01 Improvements in or relating to button clamps for sewing machines Expired GB863220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP17826A DE1019537B (en) 1957-01-22 1957-01-22 Control of the button clamp of button sewing machines

Publications (1)

Publication Number Publication Date
GB863220A true GB863220A (en) 1961-03-22

Family

ID=6800728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23/58A Expired GB863220A (en) 1957-01-22 1958-01-01 Improvements in or relating to button clamps for sewing machines

Country Status (4)

Country Link
US (1) US2963999A (en)
DE (1) DE1019537B (en)
FR (1) FR1183285A (en)
GB (1) GB863220A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494311A (en) * 1964-07-02 1970-02-10 Mckee Button Co Inc Apparatus for selecting and positioning buttons for sewing on a sewing machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039410A (en) * 1959-10-01 1962-06-19 Singer Mfg Co Automatic clamp opening devices for sewing machines
US3854431A (en) * 1973-06-19 1974-12-17 A 1 Sewing Center Opening means for button-holding accessory to sewing machine
US4031835A (en) * 1976-05-07 1977-06-28 Usm Corporation Device for clamping the workpiece in a sewing machine
US5619941A (en) * 1996-02-21 1997-04-15 Amf Reece, Inc. Clamp for a buttonhole sewing machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US767539A (en) * 1904-04-21 1904-08-16 Singer Mfg Co Buttonhole cutting and stitching machine.
US1265382A (en) * 1914-09-18 1918-05-07 United Shoe Machinery Corp Work-holding clamp.
US1265383A (en) * 1916-10-16 1918-05-07 United Shoe Machinery Corp Work-clamping mechanism.
US2096136A (en) * 1936-04-30 1937-10-19 Reece Button Hole Machine Co Button clamp
US2383875A (en) * 1940-05-20 1945-08-28 William T Maxant Button sewing machine
US2359035A (en) * 1943-07-26 1944-09-26 Singer Mfg Co Work holder for article attaching machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3494311A (en) * 1964-07-02 1970-02-10 Mckee Button Co Inc Apparatus for selecting and positioning buttons for sewing on a sewing machine

Also Published As

Publication number Publication date
DE1019537B (en) 1957-11-14
US2963999A (en) 1960-12-13
FR1183285A (en) 1959-07-06

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