US3754478A - Main shaft for sewing machines - Google Patents

Main shaft for sewing machines Download PDF

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Publication number
US3754478A
US3754478A US00198121A US3754478DA US3754478A US 3754478 A US3754478 A US 3754478A US 00198121 A US00198121 A US 00198121A US 3754478D A US3754478D A US 3754478DA US 3754478 A US3754478 A US 3754478A
Authority
US
United States
Prior art keywords
handwheel
pulley
shaft
main shaft
sewing machines
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
US00198121A
Other languages
English (en)
Inventor
S Perlino
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.)
Necchi SpA
Original Assignee
Necchi SpA
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 Necchi SpA filed Critical Necchi SpA
Application granted granted Critical
Publication of US3754478A publication Critical patent/US3754478A/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
    • D05B69/00—Driving-gear; Control devices
    • D05B69/30—Details
    • D05B69/34—Hand-wheel clutches
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S74/00—Machine element or mechanism
    • Y10S74/10—Polymer digest - plastic gears
    • 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
    • Y10T74/19851—Gear and rotary bodies
    • Y10T74/19856—Laterally-spaced wheels
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y10T74/2084—Knob or dial

Definitions

  • the invention relates to a means whereby a shaft and Fleld of Search 10, various nonnany separately made rotary members may 74/553; 264/274; 112/218 R, 220 all be assembled in essentially a single step.
  • the shaft is inserted into a mold and the other rotary members 1 References Cited are molded therearound as a one piece body.
  • the present invention refers to a novel construction of a main shaft for a sewing machine wherein said shaft is integrally constructed with its handwheel and pulleys.
  • An object of the present invention is a novel combination of the aforementioned parts and a process for making same whereby the machining time and costs can be reduced without sacrificing precision of the finished product.
  • This main object is realized by an arrangement and method whereby the handwheel and various pulleys are integrally molded onto the shaft, the latter of which constitutes the insert in a molding operation.
  • FIGURE is a section view of the intensive assembly formed by the handwheel, the drive members and the sewing machine main shaft.
  • a hollow handwheel l1 and a toothed pulley 12 carrying a crown toothing 13 are integrally formed on the main shaft by a molding process.
  • a second toothed pulley 14, also provided with a crown toothing 15, is formed adjacent to larger pulley 12 in order to transmit motion by usual means, from main shaft 10 to a driven shaft, not shown.
  • shaft 10 has knurled radially recessed surface 16 which provides a gripping means between said shaft and the body B formed by handwheel 11 and the driving members 12 and 14, adapted to prevent relative rotation and axial displacement between the said body B and shaft 10.
  • Said body is made of suitable plastic material, such as Delrin or Nylon, adapted to give each element the function features necessary for its specific use.
  • a steel shaft 10 is introduced into a mold as an insert and then plastic material is injected into the mold spaces surrounding the said shaft. Said spaces define said body B so that the aforementioned process results in the formation of a handwheel and two pulleys and simultaneous assembly thereof on shaft 10 in essentially a single step.
  • the body 8 is molded to include thin radial ribs 17 between handwheel 11 and pulley 12 and the axial thickness ofpulley 12 is kept as small as possible.
  • Circumferentially spaced, axially extending lightening holes 18 are then bored into pulley 14 to avoid axial and circumferential distortions thereon.
  • the dimensions and structure of said ribs and holes are carefully calculated to balance shrinkage tension effects exerted on pulley 12 which is particularly sensitive to said effects owing to its extension.
  • l-landwheel 11 is hollow and open at its free end. It is closed at this end by means of a disc 20, also of plastic material, produced by a separate operation.
  • Said disc 20 is mounted onto said handwheel 11, by forcing into its cylindrical surface 19, when it has not completely cooled, that is when the assembly has not yet begun to shrink.
  • Shaft 10 is mounted generally on the sewing machine by means of two bushings one of them is shown in the drawing and pointed out with number 21 placed in a suitable seat provided in the frame 22.
  • Handwheel 11 and drive elements are mounted overhanging relative to mount bushing 21.
  • a sewing machine main shaft to which is rigidly molded as an integral one piece body a handwheel and a pair of pulleys of different diameter, said handwheel and one pulley being axially spaced apart from each other and including therebetween radially extending stiffening ribs, said other pulley containing therewith circumferentially spaced axially extended lightening holes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Pulleys (AREA)
US00198121A 1970-11-17 1971-11-12 Main shaft for sewing machines Expired - Lifetime US3754478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT4296970 1970-11-17

Publications (1)

Publication Number Publication Date
US3754478A true US3754478A (en) 1973-08-28

Family

ID=11254765

Family Applications (1)

Application Number Title Priority Date Filing Date
US00198121A Expired - Lifetime US3754478A (en) 1970-11-17 1971-11-12 Main shaft for sewing machines

Country Status (5)

Country Link
US (1) US3754478A (de)
CH (1) CH539161A (de)
DE (1) DE2155666A1 (de)
FR (1) FR2117040A5 (de)
GB (1) GB1327529A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270394A (en) * 1977-06-16 1981-06-02 Murata Manufacturing Co., Ltd. Toning shaft for a rotary switch
US4488451A (en) * 1982-02-18 1984-12-18 Keiper U.S.A. Inc. Integral hand knob gear
USD797542S1 (en) * 2015-10-16 2017-09-19 Brandon C. Block Hockey puck door knob

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3445892A1 (de) * 1984-12-15 1986-06-19 INA Wälzlager Schaeffler KG, 91074 Herzogenaurach Rohrfoermiges bauteil aus einem polymeren werkstoff

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US194995A (en) * 1877-09-11 Improvement in sewing-machines
US295215A (en) * 1884-03-18 Euel w
US1932974A (en) * 1932-04-06 1933-10-31 Singer Mfg Co Driving device
US3016578A (en) * 1957-12-11 1962-01-16 Frederick W Rohe Moldable insert panel and method of assembly
US3081497A (en) * 1960-05-06 1963-03-19 Ralph M Hill Method for molding objects with inserts
US3491441A (en) * 1967-09-27 1970-01-27 United Carr Inc Method of making a sealed electrical connector component
US3610066A (en) * 1969-11-03 1971-10-05 Frank J Rychlik Reinforced plastic gear

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US194995A (en) * 1877-09-11 Improvement in sewing-machines
US295215A (en) * 1884-03-18 Euel w
US1932974A (en) * 1932-04-06 1933-10-31 Singer Mfg Co Driving device
US3016578A (en) * 1957-12-11 1962-01-16 Frederick W Rohe Moldable insert panel and method of assembly
US3081497A (en) * 1960-05-06 1963-03-19 Ralph M Hill Method for molding objects with inserts
US3491441A (en) * 1967-09-27 1970-01-27 United Carr Inc Method of making a sealed electrical connector component
US3610066A (en) * 1969-11-03 1971-10-05 Frank J Rychlik Reinforced plastic gear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270394A (en) * 1977-06-16 1981-06-02 Murata Manufacturing Co., Ltd. Toning shaft for a rotary switch
US4488451A (en) * 1982-02-18 1984-12-18 Keiper U.S.A. Inc. Integral hand knob gear
USD797542S1 (en) * 2015-10-16 2017-09-19 Brandon C. Block Hockey puck door knob

Also Published As

Publication number Publication date
DE2155666A1 (de) 1972-05-31
FR2117040A5 (de) 1972-07-21
GB1327529A (en) 1973-08-22
CH539161A (it) 1973-07-15

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