US3771329A - Adjusting device for the tightness of the knitting on knitting machines - Google Patents

Adjusting device for the tightness of the knitting on knitting machines Download PDF

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Publication number
US3771329A
US3771329A US00222067A US3771329DA US3771329A US 3771329 A US3771329 A US 3771329A US 00222067 A US00222067 A US 00222067A US 3771329D A US3771329D A US 3771329DA US 3771329 A US3771329 A US 3771329A
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United States
Prior art keywords
electric
cam
knitting
stitch
motor
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
US00222067A
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English (en)
Inventor
E Krause
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.)
SCHIEBER R GmbH
Original Assignee
SCHIEBER R GmbH
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
Priority claimed from DE19712111553 external-priority patent/DE2111553C3/de
Application filed by SCHIEBER R GmbH filed Critical SCHIEBER R GmbH
Application granted granted Critical
Publication of US3771329A publication Critical patent/US3771329A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/327—Cam systems or assemblies for operating knitting instruments for stitch-length regulation
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements

Definitions

  • the present invention relates to a device for adjusting the tightness of knitting produced on knitting machines, and particularly flat-bed knitting machines, by changing the position of the knitting machines stitch cams.
  • the adjustment device comprises a continuously operating electric motor for adjustment of the stitch cams and an electric bridge circuit including an electric displacement pickup and at least one individually adjustable electric setting device by means of which the electric motor is controlled.
  • the electric setting devices may be potentiometers mounted in a conveniently accessible location.
  • the electric displacement pickup is preferably firmly connected to the stitch cam.
  • the adjustment device of the present invention is preferably so developed that the different electric setting devices are automatically connected in optionally controllable manner with the control apparatus of the knitting machine.
  • Apparatus according to the present invention can be so constructed that the stitch cam together with its entire adjustment device is supported in such a manner that it can be moved upward against spring action in a lock in a vertical direction by the needle butts of the knitting machine needles.
  • the adjusting device comprises in this connection, for instance, means supporting and guiding of the stitch cam, an adjusting spindle, a displacement pickup and an electric motor.
  • One advantage of the apparatus in accordance with the invention resides in the fact that the adjusting devices are no longer contained on the carriage, while the electric motor itself together with its corresponding measuring and actuating means is arranged on the carriage.
  • FIG. 1 is a schematic wiring diagram for a stitch cam adjustment device according to one embodiment of the present invention
  • FIG. 2 is a schematic top view of a removeable part of an adjustment device according to the present invention and showing a control and measuring unit for the positioning of a stitch cam;
  • FIG. 3 is a top view of an adjusting knob with a vernier scale, for making adjustments to the circuit of FIG.
  • FIG. 4 is a view, partially in section, of an adjusting device in accordance with the present invention, and showing that device in its upward position.
  • a bridge circuit 9 for supplying current to a continuously operating electric motor for the displacement of stitch cams.
  • One half of the bridge circuit 9 comprises one of four manually adjustable selection potentiometers l, 2, 3 and 4 which are arranged in easily accessible fashion on the main body of the knitting machine.
  • Each of the potentiometers l, 2, 3 or 4 can be connected optionally into the bridge circuit 9 by means of a switch 5, 6, 7 or 8 associated with it.
  • the switches 5, 6, 7 and 8 are located in the control apparatus of the knitting machine and are, if necessary, automatically selected and actuated.
  • the remaining half of the bridge circuit 9 comprises a displacement pickup 10 which is, for instance, also a potentiometer and is connected with the connected selection potentiometer l, 2, 3 or 4 to complete the bridge.
  • the bridge circuit 9 is fed by a source of voltage 9a.
  • the displacement pickup 10 which, as is shown in FIG. 2, is firmly connected with the stitch cam 11, is displaced by the rotation of a motor 12 which is controlled via an amplifier 13 corresponding to the detuning of the bridge circuit 9.
  • the motor 12 rotates in a given direction until equalization of voltage has been obtained in the bridge circuit 9 corresponding to the adjustment of the potentiometer l, 2, 3 or 4 connected at the time.
  • the stitch cam isguided in a cam plate 14, and is pulled firmly by a tension spring 15 via a stop 16 against a transport nut 17.
  • the transport nut 17 travels on an adjustment spindle 18 which is lightly supported in bearings 19 and 20.
  • a bevel gear 22, firmly connected with the adjustment spindle 18, is driven by a bevel gear 21 which is firmly seated on the shaft of the motor 12 so that, depending on the direction of the rotation of the motor 12, the transport nut 17, and thus the stitch cam 11, is moved up or down.
  • the displacement pickup is rigidly connected with the stitch cam 11 so that it indicates the exact position thereof.
  • the potentiometers l, 2, 3 and 4 are each adjusted by means of individual rotary knobs 24 bearing a vernier scale 23, as shown in FIG. 3.
  • the rotary knobs for this adjustment are arranged on the main frame of the knitting machine at a place which is readily accessible.
  • FIG. 4 there is shown a view, partially in section, of the adjusting device in accordance with the invention. Since upon the knitting the leading stitch cam must always be swung so high that it does not pull the needles down below cam level, it would be disadvantageous if the stitch cam had to move over a large distance at each point of reversal of the carriage and if its displacement time differed from the actual adjustment time.
  • the entire adjusting device 24 is therefore fastened to two guide bolts 27 and 28 which are guided in the carriage 26 and are pulled downwardly by a spring 29 at all times in the direction of an arrow A shown in FIG. 4. It remains in this position if the stitch cam lags, i.e. when it pulls down the needles for the stitching.
  • the adjusting device is pressed by an inclined surface (not shown) in the direction opposite that of the arrow A shown in FIG. 4, and an electromagnet 30 shifts a detent bolt 31 into a detent groove 32 in the guide bolt 28.
  • the entire adjusting device is so held that the switch cam 11 can no longer reach a needle butt 33.
  • Apparatus for adjusting the tightness of the knitting by changing the position of the stitch cams on knitting machines comprising an electric motor mounted adjacent to a stitch cam to be adjusted and said motor being coupled to said cam to adjust the position thereof, and an electric motor control circuit for controlling the operation of said motor to adjust said cam to a predetermined position, said control circuit comprising an electric bridge circuit, said bridge circuit including, on one side thereof, an electric displacement pickup firmly connected with the stitch cam, and on the other side, at least one individually adjustable electric setting device via which the electric motor can be controlled.
  • Apparatus according to claim 1 wherein there is provided supporting means by which the entire adjusting device, including said stitch cam, is supported vertically under spring action in a carriage lock in such a manner that it can be moved upward by the needle butts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Making Paper Articles (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
US00222067A 1971-03-10 1972-01-31 Adjusting device for the tightness of the knitting on knitting machines Expired - Lifetime US3771329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712111553 DE2111553C3 (de) 1971-03-10 Verstellvorrichtung für die Festigkeit des Gestricks an Strickmaschinen

Publications (1)

Publication Number Publication Date
US3771329A true US3771329A (en) 1973-11-13

Family

ID=5801128

Family Applications (1)

Application Number Title Priority Date Filing Date
US00222067A Expired - Lifetime US3771329A (en) 1971-03-10 1972-01-31 Adjusting device for the tightness of the knitting on knitting machines

Country Status (6)

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US (1) US3771329A (en))
JP (1) JPS5138829B1 (en))
CS (1) CS157725B2 (en))
GB (1) GB1361562A (en))
IT (1) IT953384B (en))
SU (1) SU464130A3 (en))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004437A (en) * 1975-04-09 1977-01-25 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Flat knitting machine
US4502300A (en) * 1982-12-07 1985-03-05 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Tension adjusting device for flat knitting machines
US4526017A (en) * 1982-12-11 1985-07-02 Shima Idea Center Co., Ltd. Knitting density adjusting method
US4554802A (en) * 1983-03-24 1985-11-26 H. Stoll Gmbh & Company Adjustment of stitch cams in a knitting machine
US4723423A (en) * 1983-10-06 1988-02-09 H. Stoll Gmbh & Co. Flat-bed knitting machine having an electronic control for the movement of the needle sinker
US6012405A (en) * 1998-05-08 2000-01-11 Mcet, Llc Method and apparatus for automatic adjustment of thread tension

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54100325U (en)) * 1977-12-27 1979-07-14
JPS54133517U (en)) * 1978-03-09 1979-09-17
JPS6219536B1 (en)) * 1980-09-30 1987-04-30 Shima Idea Center Co Ltd

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571765A (en) * 1920-07-08 1926-02-02 Max Nydegger Pattern-change mechanism for knitting machines
US3035426A (en) * 1956-08-20 1962-05-22 Macqueen Kenneth Gordon Knitting processes and knitting machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1571765A (en) * 1920-07-08 1926-02-02 Max Nydegger Pattern-change mechanism for knitting machines
US3035426A (en) * 1956-08-20 1962-05-22 Macqueen Kenneth Gordon Knitting processes and knitting machines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004437A (en) * 1975-04-09 1977-01-25 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Flat knitting machine
US4502300A (en) * 1982-12-07 1985-03-05 Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg Tension adjusting device for flat knitting machines
US4526017A (en) * 1982-12-11 1985-07-02 Shima Idea Center Co., Ltd. Knitting density adjusting method
US4554802A (en) * 1983-03-24 1985-11-26 H. Stoll Gmbh & Company Adjustment of stitch cams in a knitting machine
US4723423A (en) * 1983-10-06 1988-02-09 H. Stoll Gmbh & Co. Flat-bed knitting machine having an electronic control for the movement of the needle sinker
US6012405A (en) * 1998-05-08 2000-01-11 Mcet, Llc Method and apparatus for automatic adjustment of thread tension

Also Published As

Publication number Publication date
IT953384B (it) 1973-08-10
CS157725B2 (en)) 1974-09-16
DE2111553A1 (de) 1972-09-21
GB1361562A (en) 1974-07-30
JPS5138829B1 (en)) 1976-10-23
SU464130A3 (ru) 1975-03-15
DE2111553B2 (de) 1976-02-05

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