US2868149A - Sewing machines - Google Patents

Sewing machines Download PDF

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Publication number
US2868149A
US2868149A US600748A US60074856A US2868149A US 2868149 A US2868149 A US 2868149A US 600748 A US600748 A US 600748A US 60074856 A US60074856 A US 60074856A US 2868149 A US2868149 A US 2868149A
Authority
US
United States
Prior art keywords
cutter
arm
lever
bar
spring
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
US600748A
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English (en)
Inventor
Winz Karl
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
Application granted granted Critical
Publication of US2868149A publication Critical patent/US2868149A/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
    • D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
    • D05B37/04—Cutting devices
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8759—With means to connect or disconnect tool and its drive
    • Y10T83/8761—Continuously moving drive means [e.g., "gag"]

Definitions

  • This invention relates to 's'ewingmachines. having a cutting ,arrangement L for trimming .or .separating the stitched materials alongside the row of stitching.
  • Iln accordancewithithej present inv'ention'the object is achieved'by using a'isinglecon'trol lever both for engage ment and disengagement "of :the'cutt'er; i'andacting always "in' the'same directio-n,"said'controllever acting inthe one '.ca”se on thecutter bar to'r'no've it into operative position and at the same time .to” hold a pivoted disengagement l .leverl'inoperative,l'andacting' in” the" otherTcase on'said .pivo-ted lever to effect" a release' of' 'theicutter bar.
  • the cutter drive. is. effected. in .known manner. from an eccentriotnotnshown) arranged on the arm shaft, an eccentric rod-19 .andardrivelever; 20 which is' adjustab ly 'linked'thereto. .This .-lever-.. 20 is secured'to-the cutter -drive.shaftfizz-amounted. in lugs 21 'of the head 6, such shaft havingclamped .to. ..-it-the cutter drive crank 23.
  • the sleeve.24..with.the .pin 25 projects freely througha slot 29. in :thezhead plate 30 (Fig. .2 which is secured to thehead of. the machine by. means ofscrews 31. .As the .said..armvshaft-rotates,:the crank.23 oscillates and thereforev moves. .the-,pin..25. up. and down ina short, sub
  • the reciprocating needle bar”8 is"arranged in'the head6' which carries'the needle 7far'1d'is driven in ""the' usual manner'bywayf of" a crank”operated by the arm "sha'ft' WhlChlS” notshown 'in thedrawing.
  • the pre'ssei' bar 10'carrying the presser foot 9 may 'be' raised "as desi'red either 'by"the"1ifting lever 1 1acted upon by lrneefilever or treadle;""or by"thfinger lever 12.
  • Apin 3sextending'upwardly; from the bolt. 35 is guided vin .a.slot.-39 .inthe-top of the..pressure member--32.
  • a carrier or' bracket-40 having two arms 4l'between which atriplever 421s mounted on screw'43, is secured screws 31 'which :hbldthewhead :plate inposition.
  • the trip lever 42 is under "the irifl-uence'oi 14 (Figs. 1- and 2) the inner-end of pin..25.rnerelyislidesup and .down 0n-.:to...the-.edge..28...of.the-low.er partofthe'cutter .-.bar..13,.below the. notch. or recess ⁇ 26. If, for engaging I the pin 38 (Fig. 2) in the raised position.
  • a double-armed control lever 50 (Fig. l) the rear arm 51 of which is pivotally connected to a pressure rod'52 constrained by a pressure-spring 53.
  • the pressure rod 52 passes through a 'bore 54 in the base plate 3 Y of the machine, and under the table top 2 where, through aTeversing lever 55, it is connected to an actuating rod 56 which is moved in turn by a control member such as a knee lever, pedal, magnet or the like (not shown).
  • the front arm 57 of the control lever 50 is bent so that its 'end portion 58, extending horizontally parallel to the upper edge of the head plate 30, is disposed just above the pressure member 32 when the cutter bar is disengaged.
  • Figs. 1 and 2 the cutter bar 13 is raised, being in the disengaged position.
  • the pressure bolt 35 extends out of the pressure member 32 at its head end under the pressure of the spring 37 and the pin 38 is disposed against the closed end of the slot 39.
  • the upper arm 45 of the trip lever 42 is disposed at the front of the bolt 35 under the action of the spring 47 and the forward end 58 of the control lever 50 is on the right side of
  • the control member is actuated topull down the rod 56, thereby moving the control lever 50 clockwise (Fig. 1) and therefore counterclockwise in Figs. 25.
  • the cutter bar 13 is-moved downwardly by the overhanging portion 58,
  • the device has been explained with reference to the example of an edge cutter or trimmer. It may also be used for the engagement and disengagement of cutters for severing material into separate pieces.
  • a reciprocating cutter bar mounted in said machine head having a cutter end extending downwardly and an operating end, .extending upwardly from said machine head and having a recess, a spring extending between said cutter bar and said machine head biasing said cutter bar toward inoperative position away from said work support, driving means including a crank arm and a shaft journaled in the machine arm linking said cutter bar by way of a slidable pin on said crank arm for reciprocating movement to' said main drive shaft, said slidable pin extending through an aperture in the machine head for engaging said recess, an adjusting nut disposed endwise and circumferentially of said slidable pin, a pressure member disposed on the operating end of said cutter bar and having a slot, a spring biased slidable bolt extending through said pressure member and having an outwardly extending conformation movable in said slot, a trip lever extending substantially parallel
  • driving means including a crank arm and a shaft journaled .inthe machine arm linking said cutter bar by way of a slidable pin/on said crank arm for reciprocating movement to said main drive shaft, said slidable pin extending through an aperture in the machine head for engaging said recess, an adjusting nut disposed endwise and circumferentially of said slidable pin, a pressure member disposed onthe operating end of said cutter bar and having a slot, a spring biased slidable bolt extending through said pressure member and having an outwardly extending conformation movable in said slot, a trip lever extending substantially parallel to said cutter bar and mounted on the machine head having one arm in operating engagement'with said adjusting nut and the other arm proximate said pressure bolt, a spring secured to one arm of said lever and biasing said lever toward said pressure bolt, a double armed control lever mounted on a pivot laterally of the machine including manipulating means and spring biased toward inoperative position, said control lever extending lengthwise, of the machine arm and having an upward

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US600748A 1955-08-09 1956-07-30 Sewing machines Expired - Lifetime US2868149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE342828X 1955-08-09

Publications (1)

Publication Number Publication Date
US2868149A true US2868149A (en) 1959-01-13

Family

ID=6242057

Family Applications (1)

Application Number Title Priority Date Filing Date
US600748A Expired - Lifetime US2868149A (en) 1955-08-09 1956-07-30 Sewing machines

Country Status (6)

Country Link
US (1) US2868149A (de)
AT (1) AT203346B (de)
CH (1) CH342828A (de)
DK (1) DK91552C (de)
FR (1) FR1161719A (de)
GB (1) GB808860A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426466A (en) * 1919-06-07 1922-08-22 Singer Mfg Co Trimming device for sewing machines
US1932953A (en) * 1932-06-23 1933-10-31 Singer Mfg Co Trimming mechanism for sewing machines
US2308470A (en) * 1940-05-07 1943-01-12 Singer Mfg Co Trimmer mechanism for sewing machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426466A (en) * 1919-06-07 1922-08-22 Singer Mfg Co Trimming device for sewing machines
US1932953A (en) * 1932-06-23 1933-10-31 Singer Mfg Co Trimming mechanism for sewing machines
US2308470A (en) * 1940-05-07 1943-01-12 Singer Mfg Co Trimmer mechanism for sewing machines

Also Published As

Publication number Publication date
DK91552C (da) 1961-08-14
FR1161719A (fr) 1958-09-03
GB808860A (en) 1959-02-11
CH342828A (de) 1959-11-30
AT203346B (de) 1959-05-11

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