US2730059A - Trimming mechanisms for sewing machines - Google Patents

Trimming mechanisms for sewing machines Download PDF

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Publication number
US2730059A
US2730059A US331643A US33164353A US2730059A US 2730059 A US2730059 A US 2730059A US 331643 A US331643 A US 331643A US 33164353 A US33164353 A US 33164353A US 2730059 A US2730059 A US 2730059A
Authority
US
United States
Prior art keywords
pin
bar
trimmer
arm
lever
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
US331643A
Other languages
English (en)
Inventor
Ritter Herman
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
Application filed by Singer Co filed Critical Singer Co
Priority to US331643A priority Critical patent/US2730059A/en
Priority to GB35678/53A priority patent/GB730708A/en
Priority to DES37051A priority patent/DE940502C/de
Priority to CH332105D priority patent/CH332105A/de
Priority to FR1091462D priority patent/FR1091462A/fr
Application granted granted Critical
Publication of US2730059A publication Critical patent/US2730059A/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
    • D05B37/06—Cutting devices with oscillating tools
    • D05B37/063—Cutting devices with oscillating tools in synchronism with the movement of the needle bar or the work-feeding means
    • 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"]
    • Y10T83/8762—Hand actuated connecting means

Definitions

  • Fig. 1 is a fragmentary vertical section view particularly of the head together with portions of the bed and bracket-arm of a sewing machine embodying the present invention.
  • Fig. 2 is a vertical section view taken substantially on the line 2-2 of Fig. 1.
  • Fig. 3 is a horizontal section view taken substantially on the line 33 of Fig. 1.
  • Fig. 4 is a vertical sectional view taken substantially on the line 44 of Fig. 1.
  • Fig. 5 is a vertical section view taken substantially on the line 55 of Fig. 3.
  • Fig. 6 is a vertical section view taken substantially on the line 6-6 of Fig. 4.
  • the present invention is embodied in a conventional sewing machine having a bed 1 and an overhanging bracket-arm 2 that terminates in a head 3, the open end of which head is closed by a removable face-plate 4.
  • An aperture 5 is provided in the upper portion of the bracket-arm to permit access to the internal mechanism, which aperture is closed by a cover-plate 6.
  • a presser-bar 7, and a needle-bar 8 carrying a needle 9 at its lower end, are journaled for vertical reciprocation in the head 3 in the usual manner.
  • the presser-bar 7 may be raised or lowered by means of a hand-lifter lever 10 or by a knee or foot actuated lever 11 through any appropriate well-known connections.
  • Journaled longitudinally of the bracket-arm 2 is an arm-shaft 12, one of the bearings for which shaft is illustrated at 13.
  • the shaft 12 carries a counterbalanced crank 14 which is connected to the needle-bar 8 in any suitable manner, whereby the needlebar will be reciprocated upon rotation of the shaft 12.
  • the shaft 12 is connected at its opposite end to a suitable source of power and that the needle 9 is adapted to cooperate with suitable loop- 2,730,059 Patented Jan. 10, 1956 2 taker mechanism below the bed 1, whereby the shaft 12 will be rotated to actuate the needle in timed relation with respect to the loop-taker to efiect stitch formation, all of which mechanism may be conventional and therefore is not shown in the drawings nor described herein.
  • trimmer-bar 15 which is positioned between the needle-bar 8 and presser-bar 7.
  • the trimmer-bar 15 carries a bracket 16 secured thereto for adjustment transverse to the line of stitch formation by means of screws 17 which extend through elongated slots 18 in the bracket 16 and are threaded into the trimmer-bar 15.
  • the bracket 16 includes a depending arm 19 to the one face of which is secured a trimmerblade 20 having a cutting edge 21.
  • the blade 20 is clamped and held between a plate 22 and the bar 15 by means of screws 23 which extend through a vertical elongated slot 24 in the blade 20 whereby the same may be adjusted vertically.
  • the trimmer-blade 20 is adapted to cooperate with the cutting edge of a stationary ledger blade 25 which is adjustably secured to a conventional throat-plate 26 by means of a screw 27 that extends through an elongated slot 28 in the ledger blade 25 and is threaded into the throat-plate 26.
  • the throat-plate is removably carried by the bed 1.
  • the mechanism for imparting vertical reciprocation to the trimmer-bar 15 includes a countershaft 29 arranged parallel to the arm-shaft 12, and vertically above and to the rear of the same, which countershaft is journaled in suitable bearings 30 fixed as by screws 31 in internal lugs 32 integral with the machine frame. At one end, the countershaft 29 is embraced by the hub or strap portion 33 of.
  • crank arm 34 which, at its free end, is pivotally connected as by a crank pin 35 to the rec end of a pitman 36, which in turn, includes a strap portion 37 that embraces an eccentric 38 integral with a hub portion 39 fixed to the shaft 12 as by a screw 40. Also mounted upon the shaft 12 is a counterweight 41 for dynamically balancing the moving elements. From the above it Will be seen that, upon rotation of the armshaft 12, oscillation will be imparted to the countershaft 29 through the eccentric 38, pitman 36 andcrank-arm 34.
  • the .c'ountershaft 29 is embraced by the strap 42 of a crank-arm 43, the free end of which is formed as a sleeve 44 having a bore 45.
  • the bore 45 is adapted to slidably receive a pin or plunger 46 having a reduced intermediate portion 47 and a threaded end 48.
  • a coil spring 49 encircles the reduced portion 47 and is compressed between the shoulder formed on the pin 46 by the reduced portion 47 and the shoulder formed by the bore 45 which includes a small diameter end portion 50 adapted to slidably receive the reduced portion 47 of the pin 46.
  • crank-arm 43 is so dimensioned and arranged With respect to the countershaft 29 that the pin 46 carried at the end thereof will be biased by the spring 49 into engagement with the edge of the trimmer-bar 15, which is provided with a notch 51 that is adapted to receive the forward end of the pin.
  • the pin 46 normally couples the trimmer-bar 15 to the crank-arm 43 whereby, upon oscillation of the countershaft 29, recipro Qeeast g the rimmer-bar. .5 aadat heother nd. one,
  • Athumb piece-.542 securedtothe arm 19 of-thebracket 16by means of; screw 53. that passes through one face of a Ufshaped yQke element, 54 integralawith the thumbpiece and-bent at arightangle thereto.
  • Means are. provided; for manually withdrawing the pin 46 from the notch 51 and thus disabling'the trimming mechanism, said means including a lever 55 pivoted intermediate. its ends on a horizontal pivot pin 56 having. its ends fixed in the spaced walls of a U-shaped bracket- 57 securedto the face-plate 4, as by screws 58 passing through fiangeson the bracket 57.
  • The. upper endof the lever 55 comprises a fork 59 having the opposed. tines thereof passing on either side of and closely adjacent to the outer faces of the sleeve 44 which houses the, pin 46.
  • a nut 60 is screwed onto the threaded end 48 of -the pin andalock nut 61 is tightenedthereagainst.
  • Theheadof the nut 60 is enlarged or may carry a washer so that the tines of the fork- 59 may abut the reagainst when the'lever 55 is pivoted about the pin 56 thus to retract the pin 46.
  • a spring 62 is used to urge the lever 55 in that direction of rotation away from the direction in which the pin 46 is retracted.
  • plunger 63 having a reduced portion 64 slidably projecting through the face-plate 4 in position to engagethe end ofthe lever 55.
  • the reduced portion 64 is provided with a peripheral snap-ring 65 which serves as a stop to limit withdrawal of the plunger 63 and thus limit the action of the spring 62 From.
  • bracket-arm 2 and head-Skogether with the cover-plate fiand face-plate 4 dcfine a. substantially closed, oil-tight compartment in which the internal 7 mechanisms are adapted to operate.
  • the present trimmeri throw-outdevice is designed specifically to; preserve the oil-tight, character of this compartment while including 7 a manually operated means outside there offer disconnectingthe,trimmer drive connections inside will snggestthemselvesito. thosev skilled in the. art. Howogen.itzistotbqunderstood that-the present disclosure re- Numerous alterations of the structure herein disclosed.
  • a reciprocable trimmer-bar and an actuating element therefor mounted within 'said closed, compartment, a releasableconnection between said trimmer-bar and said actuating element comprising a slidable pin carried by saidactuating element for sliding movement relative thereto and a cooperating notch formed in said trimmer-bar, 'a lever piv t'4 lly mounted.
  • a bracket-arm terminating in a. head ancia faceplate closing an open end, of said head to define a closed compartment, a recipro-I cable trimmer-bar and an actuating element therefor mounted within said closed compartment, a releasable connection between said trimmer-bar and said actuating element comprising aslidable pin carried by said actuatiing element for sliding movement relative thereto and a cooperating notch formed in said trimmer-bar, said pin being provided with a peripherally reduced portion, a lever pivotally mounted intermediate its ends upon said face-plate within said closed compartment to provide opposite lever-arms, one of said arms being folkqd and.
  • aj trimming mechanism comprising a trimmer-bar monnted within said head for longitudinal. reciprocation, an oscil; latory shaft journaled within said bracketarm. long i-, tudinally of the same and, extending into said closed compartment, a cranl -arm secured toisaid,shafpwithin; said closed compartment, and a releasable.
  • crank-arm and trimmer-bar comprising a slidablepin carriedby said crank-armfor sliding move.- ment relativetheretotand a cooperating notchformedrin said trimmer-bar, a lever pivotally mountedupon said face-plate within said closed compartment and opera ⁇ lively connected'to said pin for retracting the same upon pivotal movement of said lever, and a plunger carriedby said face-plate for axial sliding movement.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US331643A 1953-01-16 1953-01-16 Trimming mechanisms for sewing machines Expired - Lifetime US2730059A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US331643A US2730059A (en) 1953-01-16 1953-01-16 Trimming mechanisms for sewing machines
GB35678/53A GB730708A (en) 1953-01-16 1953-12-23 Trimming mechanism for sewing machines
DES37051A DE940502C (de) 1953-01-16 1954-01-06 Trenneinrichtung fuer Naehmaschinen
CH332105D CH332105A (de) 1953-01-16 1954-01-14 Trenneinrichtung an einer Nähmaschine
FR1091462D FR1091462A (fr) 1953-01-16 1954-01-16 Mécanisme rafraîchisseur pour machine à coudre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US331643A US2730059A (en) 1953-01-16 1953-01-16 Trimming mechanisms for sewing machines

Publications (1)

Publication Number Publication Date
US2730059A true US2730059A (en) 1956-01-10

Family

ID=23294782

Family Applications (1)

Application Number Title Priority Date Filing Date
US331643A Expired - Lifetime US2730059A (en) 1953-01-16 1953-01-16 Trimming mechanisms for sewing machines

Country Status (5)

Country Link
US (1) US2730059A (de)
CH (1) CH332105A (de)
DE (1) DE940502C (de)
FR (1) FR1091462A (de)
GB (1) GB730708A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171372A (en) * 1963-01-29 1965-03-02 Union Special Machine Co Edge trimming mechanism for sewing machines
US20050120932A1 (en) * 2003-10-17 2005-06-09 Mikio Mori Cloth cutting devices for use with sewing machines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US361501A (en) * 1887-04-19 Device for filling cop-holders with wire
US668184A (en) * 1900-04-10 1901-02-19 Singer Mfg Co Trimmer for sewing-machines.
US826596A (en) * 1905-06-03 1906-07-24 Wheeler & Wilson Mfg Co Trimming mechanism for sewing-machines.
US866707A (en) * 1905-03-17 1907-09-24 Marcus Altstock Mechanism for operating clutches.
US2049351A (en) * 1935-06-22 1936-07-28 Isadore Friedman Pinking device for sewing machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US361501A (en) * 1887-04-19 Device for filling cop-holders with wire
US668184A (en) * 1900-04-10 1901-02-19 Singer Mfg Co Trimmer for sewing-machines.
US866707A (en) * 1905-03-17 1907-09-24 Marcus Altstock Mechanism for operating clutches.
US826596A (en) * 1905-06-03 1906-07-24 Wheeler & Wilson Mfg Co Trimming mechanism for sewing-machines.
US2049351A (en) * 1935-06-22 1936-07-28 Isadore Friedman Pinking device for sewing machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171372A (en) * 1963-01-29 1965-03-02 Union Special Machine Co Edge trimming mechanism for sewing machines
US20050120932A1 (en) * 2003-10-17 2005-06-09 Mikio Mori Cloth cutting devices for use with sewing machines
CN1609317B (zh) * 2003-10-17 2010-12-08 森胜司 与缝纫机搭配使用的布料裁切装置

Also Published As

Publication number Publication date
GB730708A (en) 1955-05-25
CH332105A (de) 1958-08-31
DE940502C (de) 1956-03-22
FR1091462A (fr) 1955-04-12

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