US3731643A - Needle reciprocating mechanism for sewing machines - Google Patents

Needle reciprocating mechanism for sewing machines Download PDF

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Publication number
US3731643A
US3731643A US00204879A US3731643DA US3731643A US 3731643 A US3731643 A US 3731643A US 00204879 A US00204879 A US 00204879A US 3731643D A US3731643D A US 3731643DA US 3731643 A US3731643 A US 3731643A
Authority
US
United States
Prior art keywords
needle
needle carrier
drive
drive arm
drive link
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
US00204879A
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English (en)
Inventor
H Middlebrook
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.)
SSMC Inc
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
Application granted granted Critical
Publication of US3731643A publication Critical patent/US3731643A/en
Assigned to SSMC INC., A CORP. OF DE reassignment SSMC INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE
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
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives

Definitions

  • This object of the invention is attained by the provision of a pivoted drive link between the driving rock arm and the needle carrier and an arrangement of the mechanism so that at each extreme position of oscillation of the driving rock arm, both pivotal connections of the drive link will be located transverse to and intersecting a line parallel to the straight path of needle reciprocation and passing substantially through the center of mass of the needle carrier.
  • FIG. 1 represents an end view of a sewing machine casing showing a needle reciprocating mechanism embodying this invention
  • FIG. 2 is an enlarged diagrammatic elevational view of the needle reciprocating mechanism of this invention showing in solid lines the mechanism at the bottom extreme position of oscillation and showing in dashed lines the mechanism at the top extreme position of oscillation.
  • a main drive shaft 15 journalled in the sewing machine casing is formed with a crank 16 embraced by a pitman 17 which is operatively connected to a crank arm 18 made fast on a needle driving rock shaft 19.
  • a split hub 20 and a clamp screw 21 to the rock shaft 19 is secured by a split hub 20 and a clamp screw 21 to the rock shaft 19 for imparting endwise reciprocatory movement to the sewing machine needle mechanism.
  • a needle carrier having a body portion 31 and an adjacent sleeve portion 32 which is slidably constrained on a straight guide rod 33 which is clamped in stationary position on the sewing machine casing by means of an integral collar 34 and a fastening nut 35 threaded on the guide rod and having a washer 36 thereunder.
  • set screws 38 conventional sewing machine needles 39 may be fastened in the needle carrier 30.
  • the needle carrier 30 may also have secured thereto, as by fastening screws 40, a needle thread take-up bracket and guide 41.
  • needle carrier assembly will, therefore, be used hereinafter to describe the needle carrier together with the needles, take-up bracket and guide and any other parts which may have to be carried for movement with the needle carrier.
  • the line X-X indicates the axes of the guide rod 33 which defines the straight path of endwise reciprocation for the needles 39.
  • Y indicates the center of mass of the needle carrier assembly and Z-Z is an imaginary line passing through the center of mass Y and parallel to the direction of endwise reciprocatory movement of the needle X-X.
  • connection between the drive arm 22 and the needle carrier 30 comprises a drive link pivotally connected by the fastening screw 51 to the drive arm 22 and pivotally connected by the fastening screw 52 to the needle carrier 30.
  • the mechanism of this invention is arranged such that at each extreme position of oscillation of the drive arm 22 both pivotal connecting screws 51 and 52 for the drive link 50 are located on axes transverse to and intersecting the line Z--Z.
  • the solid line position indicates the bottom extreme position of oscillation of the drive link 22 while the dashed line position indicates the extreme top position of oscillation thereof.
  • the pivotal connection of the fastening screw 51 between the drive arm 22 and the drive link 50 is made at the opposite side of the straight guide rod 33 from the needle driving rock shaft 19.
  • the drive arm 22 may be formed with a slot 60 to provide clearance for the guide rod 33.
  • the longest possible dimension for the drive arm 22 may be attained commensurate with the space limitations in a sewing machine casing.
  • the least possible deviation of the inclination of the drive link 50 relatively to the line ZZ will be attained and, therefore, the bearing load on the guide rod 33 will be further minimized between the extreme positions of oscillation of the drive arm 22.
  • a needle reciprocating mechanism as set forth in claim 1 in which said pivotal connections of said drive link and the axis of oscillation of said drive arm are located on opposite sides of said guide means for constraining said needle carrier assembly in a linear path.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00204879A 1971-08-06 1971-12-06 Needle reciprocating mechanism for sewing machines Expired - Lifetime US3731643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3697871 1971-08-06

Publications (1)

Publication Number Publication Date
US3731643A true US3731643A (en) 1973-05-08

Family

ID=10392729

Family Applications (1)

Application Number Title Priority Date Filing Date
US00204879A Expired - Lifetime US3731643A (en) 1971-08-06 1971-12-06 Needle reciprocating mechanism for sewing machines

Country Status (5)

Country Link
US (1) US3731643A (enrdf_load_stackoverflow)
JP (1) JPS5414124Y2 (enrdf_load_stackoverflow)
FR (1) FR2148413B1 (enrdf_load_stackoverflow)
GB (1) GB1353803A (enrdf_load_stackoverflow)
IT (1) IT949920B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167913A (en) * 1977-12-23 1979-09-18 Juki Co., Ltd. Transmission mechanism in a driving means for needle of sewing machines
US4259916A (en) * 1980-02-26 1981-04-07 Rockwell-Rimoldi S.P.A. Needle control device for sewing machines
DE29819535U1 (de) * 1998-11-02 2000-03-16 KSL Keilmann Sondermaschinenbau GmbH, 64653 Lorsch Nähmaschinenkopf mit Einstichtiefen-Verstellung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5187950U (enrdf_load_stackoverflow) * 1975-01-08 1976-07-14
JPS5442129Y2 (enrdf_load_stackoverflow) * 1975-12-11 1979-12-07
JPS63105779U (enrdf_load_stackoverflow) * 1986-12-26 1988-07-08

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799236A (en) * 1955-02-04 1957-07-16 Rimoldi C Spa Virginio Needle operating device
US3645221A (en) * 1970-09-11 1972-02-29 Tokyo Juki Industrial Co Ltd Needle operation device in high-speed sewing machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799236A (en) * 1955-02-04 1957-07-16 Rimoldi C Spa Virginio Needle operating device
US3645221A (en) * 1970-09-11 1972-02-29 Tokyo Juki Industrial Co Ltd Needle operation device in high-speed sewing machines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167913A (en) * 1977-12-23 1979-09-18 Juki Co., Ltd. Transmission mechanism in a driving means for needle of sewing machines
US4259916A (en) * 1980-02-26 1981-04-07 Rockwell-Rimoldi S.P.A. Needle control device for sewing machines
DE29819535U1 (de) * 1998-11-02 2000-03-16 KSL Keilmann Sondermaschinenbau GmbH, 64653 Lorsch Nähmaschinenkopf mit Einstichtiefen-Verstellung

Also Published As

Publication number Publication date
IT949920B (it) 1973-06-11
GB1353803A (en) 1974-05-22
FR2148413B1 (enrdf_load_stackoverflow) 1973-08-10
JPS5414124Y2 (enrdf_load_stackoverflow) 1979-06-13
FR2148413A1 (enrdf_load_stackoverflow) 1973-03-23
JPS4830051U (enrdf_load_stackoverflow) 1973-04-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SSMC INC., A CORP. OF DE, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE;REEL/FRAME:005041/0077

Effective date: 19881202