GB623509A - Trimmer mechanism for sewing machines - Google Patents

Trimmer mechanism for sewing machines

Info

Publication number
GB623509A
GB623509A GB12409/47A GB1240947A GB623509A GB 623509 A GB623509 A GB 623509A GB 12409/47 A GB12409/47 A GB 12409/47A GB 1240947 A GB1240947 A GB 1240947A GB 623509 A GB623509 A GB 623509A
Authority
GB
United Kingdom
Prior art keywords
shaft
knife
needle
flanges
pulley
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
GB12409/47A
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
Publication of GB623509A publication Critical patent/GB623509A/en
Expired legal-status Critical Current

Links

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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • 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
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19251—Control mechanism
    • Y10T74/19256—Automatic
    • Y10T74/1926—Speed responsive
    • Y10T74/19265—Governor

Landscapes

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

Abstract

623,509. Sewing-machines. SINGER MANUFACTURING CO. May 7, 1947, No. 12409. Convention date, Feb. 6. [Class 112] [Also in Group XXIV] The drive for a reciprocating trimmer knife 40 is actuated from the needle drive shaft 25, and includes a centrifugal governor 200 to vary the frequency of reciprocation of the knife with respect to that of the needle. The shaft 96, driven from the needle drive shaft by bevel gears, carries a pulley 95 having flanges 103, 104 the distance apart of which is controlled by the governor. The governor is mounted on the shaft 96 and is so arranged that increase in the shaft speed increases the distance apart of the flanges. A linkage 127, 129, 130 transmits a converse movement to the flanges 86, 87 of a pulley 85 mounted on a shaft 63 and driven from the pulley 95 by a belt 90. The shaft 63 has an eccentric 62 reciprocating the knife bar 36 through toggle links 53, 54 which are held in the straightened position by a stop 57 and a spring-loaded pin 58. With the machine running at under 1,000 stitches per minute the pulleys are in the position shown in Fig. 4 and the trimmer knife reciprocates twice as fast as the needle. Increase in the machine speed reduces the relative speed of knife to needle until they have the same speed. The trimmer bar is lifted to the inoperative position by turning a lever 70 anti-clockwise Fig. 1, to break the toggle. A stop 78 on a latch 77 pivoted on the lever co-operates with the lower side of a pin 79 to hold the lever and knife inoperative. Specification 455,001 is referred to.
GB12409/47A 1947-02-06 1947-05-07 Trimmer mechanism for sewing machines Expired GB623509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US726909A US2533197A (en) 1947-02-06 1947-02-06 Trimmer mechanism for sewing machines

Publications (1)

Publication Number Publication Date
GB623509A true GB623509A (en) 1949-05-18

Family

ID=24920544

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12409/47A Expired GB623509A (en) 1947-02-06 1947-05-07 Trimmer mechanism for sewing machines

Country Status (3)

Country Link
US (1) US2533197A (en)
DE (1) DE821911C (en)
GB (1) GB623509A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631462A (en) * 1948-09-13 1953-03-17 Sterling Electric Motors Inc Power transmission
US2715842A (en) * 1949-11-08 1955-08-23 Walter J Homuth Governor controlled transmission
US2600416A (en) * 1950-09-08 1952-06-17 Int Harvester Co Drive mechanism
US2651210A (en) * 1951-05-26 1953-09-08 Int Harvester Co Centrifugally controlled variable speed v-belt power transmission
US2777409A (en) * 1954-03-17 1957-01-15 Ragnar W Winberg Feed means for sewing machines
US2841021A (en) * 1956-06-11 1958-07-01 James P Steibel Expansible pulley
DE1710923B1 (en) * 1964-08-25 1970-07-23 Altenburg Naehmasch Veb Fabric trimming device on sewing machines
US3980031A (en) * 1975-01-27 1976-09-14 Gunter Landwehr Trimming mechanism for sewing machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US498617A (en) * 1893-05-30 borton
US2323750A (en) * 1940-09-24 1943-07-06 Singer Mfg Co Trimmer mechanism for sewing machines

Also Published As

Publication number Publication date
US2533197A (en) 1950-12-05
DE821911C (en) 1951-11-22

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