US3492958A - Device for pivoting the motor of a sewing machine - Google Patents

Device for pivoting the motor of a sewing machine Download PDF

Info

Publication number
US3492958A
US3492958A US740994A US3492958DA US3492958A US 3492958 A US3492958 A US 3492958A US 740994 A US740994 A US 740994A US 3492958D A US3492958D A US 3492958DA US 3492958 A US3492958 A US 3492958A
Authority
US
United States
Prior art keywords
motor
cam
sewing machine
handwheel
drive wheel
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
US740994A
Other languages
English (en)
Inventor
Marcel Fresard
Antonio Jemenez
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.)
Mefina SA
Original Assignee
Mefina SA
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 Mefina SA filed Critical Mefina SA
Application granted granted Critical
Publication of US3492958A publication Critical patent/US3492958A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/10—Electrical or electromagnetic drives
    • D05B69/12—Electrical or electromagnetic drives using rotary electric motors

Definitions

  • the invention relates to a sewing machine device to enable movement of the motor between three different positions.
  • sewing machines should incorporate a simple, robust, inexpensive device that enables the operator easily, quickly, and accurately to move the motor into and out of engagement with the handwheel or the thread spool spindle, and into a third, neutral position in which the motor drive wheel is disengaged and the handwheel is automatically locked in a position wherein the thread take up lever is safely concealed inside of the sewing machine head.
  • the device of the invention comprises manually operated means for moving a pivotally mounted sewing machine motor into a first position, wherein the motor drive wheel is disengaged from both the handwheel and the spool thread spindle, a second position, wherein the drive wheel runs only the handwheel, and a third position 'wherein the drive wheel turns only the spool thread spintile, and means for locking the handwheel in a predetermined position when the motor is in the first position.
  • FIG. 1 is a side view in section of the vertical column of a sewing machine, enclosing the drive motor,
  • FIG. 2 is a view, partly cut away, of part of the upper end of the column
  • FIG. 3 is a top, detail view of the arrangement for controlling the position of the motor
  • FIG. 4 is a rear view, partly cut away, of the handwheel locking mechanism
  • FIG. 5 is a developed view of the profile of the cam for controlling the position of the motor.
  • a knob 15 enables the motor 3 to be moved to its positions II and III, or to a center neutral position I, in which the drive wheel 8 does not contact either the handwheel 7 or the driven wheel 12.
  • the knob is mounted to turn in the front face 16 of the column 2, and carries two cams located behind the face 16, an axially operative cam 17 and a radially operative cam 18, as illustrated in FIGS. 1, 4 and 5.
  • a forked plate 19 is fixed to the upper end of the motor housing 4. The plate is free to swing about a first mounting screw 20, a second mounting screw 21 passing through an elongated opening 22 in the plate, whereby to permit adjustment of the plates position with respect to the housing 4.
  • the plate incorporates a cam follower in the shape of a finger which contacts the profile 24 of the cam 17, the profile being shown developed in FIG. 5.
  • the cam profile is such that when the finger 23 touches the zone 25, the spindle of the drive wheel 8 is in position II, wherein the drive wheel engages the handwheel 7 to drive the sewing machine.
  • the cam follower 23 is in contact with the zone 26 of the profile 24, the drive wheel spindle is in position III, for turning the driven wheel 12 of the thread spool spindle 9.
  • the other cam 18, mounted on, or forming an integral part of, the knob 15, serves to operate a lock for the handwheel 7 when the latter is in a predetermined position.
  • this position corresponds to that in which the thread take up lever is safely located within the head of the sewing machine so that it cannot be damaged when the sewing machine is packed or shipped.
  • a lever 30 is pivotally mounted in an axle 31 mounted on the frame 1.
  • a projection of this lever constitutes a cam follower 32 in the form of a finger that contacts the profile 33 of the cam 18.
  • the end 34 of the lever is intended to enter a slot 35 in the handwheel 7 when the latter must be locked in postion.
  • the respective positions of the earns 17 and 18 are such that when the cam follower 23 for the cam 17 contacts the zone 27, which causes the motor 3 to be moved to the neutral position I, the cam follower 32 for the cam 18 contacts the deepest depression 38 of the cam profile 33, permitting the end 34 of the lever 30 to enter the slot 35 of the handwheel and to lock the latter.
  • the profile 33 of the cam 18 incorporates two additional depressions 39 and 40, which are entered by the cam follower 32, in order to prevent movement of the cams 17 and 18, when the cam 17 causes the motor 3 to take the respective positions II and III.
  • the cam 17 for controlling movement of the motor 3 into its three possible positions can be replaced by a lever or rack arrangement positioned between the knob and the motor housing 4.
  • the lock mechanism for the handwheel 7 can comprise a locking plunger instead of the means previously described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US740994A 1967-07-06 1968-06-28 Device for pivoting the motor of a sewing machine Expired - Lifetime US3492958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH956367A CH459728A (fr) 1967-07-06 1967-07-06 Mécanisme d'entraînement d'une machine à coudre

Publications (1)

Publication Number Publication Date
US3492958A true US3492958A (en) 1970-02-03

Family

ID=4353280

Family Applications (1)

Application Number Title Priority Date Filing Date
US740994A Expired - Lifetime US3492958A (en) 1967-07-06 1968-06-28 Device for pivoting the motor of a sewing machine

Country Status (12)

Country Link
US (1) US3492958A (en:Method)
AT (1) AT295981B (en:Method)
BE (1) BE716628A (en:Method)
BR (1) BR6800210D0 (en:Method)
CH (1) CH459728A (en:Method)
DK (1) DK118582B (en:Method)
ES (1) ES356104A1 (en:Method)
FR (1) FR1560037A (en:Method)
GB (1) GB1156420A (en:Method)
IE (1) IE32136B1 (en:Method)
NL (1) NL6809081A (en:Method)
SE (1) SE335274B (en:Method)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417417A (en) * 1944-04-01 1947-03-18 Free Sewing Machine Co Motor drive for sewing machines
US2943586A (en) * 1958-09-02 1960-07-05 White Sewing Machine Corp Bobbin winding mechanism
US3388681A (en) * 1965-02-05 1968-06-18 Aisin Seiki Speed change mechanism of a sewing machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417417A (en) * 1944-04-01 1947-03-18 Free Sewing Machine Co Motor drive for sewing machines
US2943586A (en) * 1958-09-02 1960-07-05 White Sewing Machine Corp Bobbin winding mechanism
US3388681A (en) * 1965-02-05 1968-06-18 Aisin Seiki Speed change mechanism of a sewing machine

Also Published As

Publication number Publication date
BE716628A (en:Method) 1968-11-04
IE32136B1 (en) 1973-04-18
AT295981B (de) 1972-01-25
CH459728A (fr) 1968-07-15
NL6809081A (en:Method) 1969-01-08
BR6800210D0 (pt) 1973-01-11
DK118582B (da) 1970-09-07
IE32136L (en) 1969-01-06
SE335274B (en:Method) 1971-05-17
ES356104A1 (es) 1969-12-16
GB1156420A (en) 1969-06-25
FR1560037A (en:Method) 1969-03-14

Similar Documents

Publication Publication Date Title
US4147313A (en) Bail latching and releasing mechanism for spin fishing reel
US3492958A (en) Device for pivoting the motor of a sewing machine
US3190249A (en) Tensioning device for the upper thread in a sewing machine
US2687669A (en) Motion-picture camera lens and filter turret locking mechanism
US3670974A (en) Releasable winding mechanism for sewing machines
US2673686A (en) Predetermining counter having magnetically held control means
US4393794A (en) Sewing machine with needle dropping hole changing control device
US3215461A (en) Knotter lock
US1925735A (en) Motor driven actuating mechanism for computing machines
US3111099A (en) Cam oscillating arrangement for automatic ornamental stitch sewing machine
US2737133A (en) Spiral sewing attachment for sewing machines
US3095765A (en) Two-speed drive for sewing machines
US2730979A (en) Sewing machine
US2529474A (en) Automatic phonograph
US3499406A (en) Control devices for bobbin thread replenishments in lockstitch sewing machines
US2291059A (en) Ironer construction
US3642356A (en) Cinematographic projectors
US3265458A (en) Electric drive camera stop
US3379129A (en) Printing machine
GB1078993A (en) Improvements in or relating to sewing machines
US3102698A (en) Automatic stop mechanism for tape recorders and the like
US2983455A (en) Bobbin winder mechanism for sewing machines
US2776738A (en) Collapsible-arm and locking mechanism for shorthand typewriters and like machines
GB1502027A (en) Thread storing and feeding device
JPS608858Y2 (ja) ミシンの糸調子器