US3339381A - Electrical control in circular knitting machines - Google Patents

Electrical control in circular knitting machines Download PDF

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Publication number
US3339381A
US3339381A US370220A US37022064A US3339381A US 3339381 A US3339381 A US 3339381A US 370220 A US370220 A US 370220A US 37022064 A US37022064 A US 37022064A US 3339381 A US3339381 A US 3339381A
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United States
Prior art keywords
needles
constant
pulses
control means
generator
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
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US370220A
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English (en)
Inventor
Schmidt Richard
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.)
Framo Morat GmbH and Co KG
Original Assignee
Franz Morat GmbH
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Filing date
Publication date
Application filed by Franz Morat GmbH filed Critical Franz Morat GmbH
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Publication of US3339381A publication Critical patent/US3339381A/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/60—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling combinations of DC and AC dynamo-electric motors
    • 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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/60—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices
    • 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 ; Program-control arrangements

Definitions

  • This invention concerns circular knitting machines which include electrically and/ or electronically controllable devices particularly for determining patterns to be produced by operating a plurality of knitting needles selectively during the rotary movement of a needle wheel carrying such needles.
  • the invention is similarly applicable to similar machines in which command devices produce low voltage or low current pulses which are then amplified and applied to electrically operable or controllable devices, as a rule consisting of electromagnets.
  • an amplifier which serves to amplify the control impulses is supplied with direct current voltage produced by a direct current generator that is, in turn, driven by a three-phase motor receiving its energy from a threephase voltage supply network.
  • a direct current generator that is, in turn, driven by a three-phase motor receiving its energy from a threephase voltage supply network.
  • the effect of voltage fluctuations in the supply network are eliminated by connecting a flywheel with the generator or with the motor, preferably on a drive shaft connecting the motor with the generator.
  • the size of the flywheel may be selected in accordance with known rules in proportion to the rotary speed of the motor-generator assembly and to the power transmitted by the motor to the generator.
  • the invention includes in a circular knitting machine including needle-carrying part-s rotating at a constant rotary speed and electronically controllable devices for determining patterns to be produced by operating a plurality of knitting needles selectively, in combination, electrically operable control means for selectively controlling the operation of individual needles out of said plurality thereof; record carrier means carrying a record of commands corresponding to a pattern to be produced; means for sequentially deriving from said record carrier means said commands in the form of low energy electric current pulses; amplifier means for amplifying said pulses and for furnishing the same to said control means for energizing the latter in accordance with said commands; direct current voltage generator means for energizing said amplifier means; three-phase motor means connected to a three-phase voltage supply network and driving said generator means; and flywheel means operatively connected with said generator means for keeping said direct current voltage and thereby said current pulses at a uniform level in spite of an occurrence of fluctuations in said three-phase voltage supply.
  • the illustrated example refers to a circular knitting machine including a pattern wheel.
  • a three-phase motor 2 connected with a three-phase supply network 1 is coupled by means of a shaft 3 with a direct current voltage generator 4 for driving the latter.
  • a flywheel 3a is mounted on the connecting shaft 3. Cables 5a and 5b connect the output terminals of the generator 4 with an amplifier 6.
  • a record carrier 8 is provided and moved in synchronism with the needle cylinder 15 and the dial 17 in a well known manner and by means not shown in the direction of the arrow over guide rolls 9. Needle cylinder 15 and dial 17 are great masses so that the same and rolls 9 rotate at a constant uniform speed.
  • the record carrier film is as usual provided with a pattern of transparent areas on a nontransparent background which corresponds to the pattern to be produced.
  • a photoelectric arrangement is provided for deriving from the recorded pattern command corresponding control pulses for the electrically controllable devices of the machine.
  • a source of light 7 is arranged on one side of the travelling film or record carrier 8 so that the light emanating from the source 7 is capable of pasing through the transparent pattern areas of the film 8, whenever they appear, and to impinge on a photo-sensitive element e.g. a photocell 10 which is con nected by lines 11a and 11b with the above mentioned amplifier 6.
  • control impulses are applied by the photoelectric arrangement to the amplifier 6 where they are amplified and applied via lines 1311 and 13b for instance to the electromagnet 12 which cooperates with the pattern wheel 14 in such a manner that the conventional jacks of this pattern wheel 14 are moved into a predetermined position everytime an impulse is applied to the electromagnet 12.
  • the electromagnet '12 may also be located on the pattern wheel 14 itself. It is well known that in accordance with the movement of the jacks of the pattern wheel during the rotation of the needle cylinder 15 the respectively associated cylinder needle 16 is moved into a desired effective position. Due to the fact that flywheel 3a maintains a constant rotary speed of generator 4, the energizing current applied to electromagnet 12 is constant and the same for each impulse, irrespective of voltage fluctuations of the three phase supply network, so that electromagnet 12 operates in synchronism with needle cylinder 15 and dial 17 which rotate at a constant speed. It may be noted that electrically operable knitting machines of this general type are known for instance from Uni-ted States Patents 3,076,- 325 and 3,079,775.
  • the current or voltage pulses furnished by the amplifier 6 may also be used for operating other electrically controllable devices eg pattern wheels which influence the dial needles 18 or devices which influence elements of the cylinder needle and/or dial needle cams, or the cylinder needles and/or the dial needles directly, or finally the movement of thread guides between two desired positions e.g. to and from operative position.
  • other electrically controllable devices eg pattern wheels which influence the dial needles 18 or devices which influence elements of the cylinder needle and/or dial needle cams, or the cylinder needles and/or the dial needles directly, or finally the movement of thread guides between two desired positions e.g. to and from operative position.
  • a circular knitting machine including rotary parts supporting knitting needles and rotating at a constant speed, and electronically controllable devices for determining pat-terns to be produced by operating a plurality of said knitting needles selectively, in combination, electrically operable control means for selectively controlling the operation of individual needles out of said plurality thereof; record carrier means carrying a record of commands corresponding to a pattern to be produced; means that the same operate in exact synchronism with said rotary parts and said needles if energized by a constant voltage; direct current voltage generator means for energizing said amplifier means; three-phase motor means connected to a three-phase voltage supply network and driving said generator means; and flywheel means operatively connected with said geneartor means for keeping said direct current voltage, which controls said control means, at a uniform level in spite of an occurrence of fluctuations in said three-phase voltage supply so that the current of said amplified pulses is constant and said control means are operated in synchronism with the constant rotary speed of said parts and said knitting needles.
  • a circular knitting machine including rotary parts supporting knitting needles and rotating at a constant speed, and electronically controllable devices for determining patterns to be produced by operating a plurality of said knitting needles selectively during the rotary movement of a needle cylinder carrying said needles
  • electrically operable control means for selectively controlling the operation of individual needles out of said plurality thereof
  • record carrier means moving synchronously with the movement of the needle cylinder and carrying a record of commands in the form of a pattern of area portions of different transparency corresponding to a pattern to be produced
  • photoelectric means for sequentially deriving from said pattern of areas of diflerent transparency on said record carrier means said commands in the form of low energy electric pulses
  • amplifier means for amplifying said pulses and for furnishing the amplified pulses to said control means for energizing the latter in accordance with said commands so that the same operate in exact synchronism with said rotary parts and said needles if energized by a constant voltage
  • direct current voltage generator means for energizing said
  • a circular knitting machine including a needle cylinder carrying knitting needles and rotating at a constant speed due to its mass, and devices for determining patterns to be produced by operating said knitting needles selectively, in combination, electromagnetic control means for said devices; record carrier means carrying a record of commands corresponding to a pattern to be produced; means for moving said record carrier means in synchronism with said needle cylinder; sensing means for sequentially deriving from said moving record carrier means selection commands in the form of electric pulses; amplifier means for amplifying said pulses and connected with said electromagnetic control means so that the same are energized by the current of said amplified pulses in accordance with said commands and operate in exact synchronism with the displacement of said needles by said needle cylinder if energized by a constant voltage; a voltage supply network; motor means connected with said network and being energized by the same; generator means having a shaft connected with said motor means for rotation so that said motor means drives said generator means, said generator means being connected with said amplifier means for energizing the same; and flywheel
  • a circular knitting machine delivers a three-phase voltage; wherein said motor means is a three-phase motor means energized by said three-phase voltage; and wherein said generator means is a direct current voltage generator means for supplying a direct current voltage to said amplifier means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Power Engineering (AREA)
  • Knitting Machines (AREA)
US370220A 1963-08-22 1964-05-26 Electrical control in circular knitting machines Expired - Lifetime US3339381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM57925A DE1254809B (de) 1963-08-22 1963-08-22 Rundstrickmaschine mit elektronisch gesteuerten Vorrichtungen

Publications (1)

Publication Number Publication Date
US3339381A true US3339381A (en) 1967-09-05

Family

ID=7309054

Family Applications (1)

Application Number Title Priority Date Filing Date
US370220A Expired - Lifetime US3339381A (en) 1963-08-22 1964-05-26 Electrical control in circular knitting machines

Country Status (8)

Country Link
US (1) US3339381A (ja)
JP (1) JPS503426B1 (ja)
AT (1) AT267034B (ja)
BE (1) BE652210A (ja)
CH (1) CH421364A (ja)
DE (1) DE1254809B (ja)
GB (1) GB1046342A (ja)
NL (1) NL6409599A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866442A (en) * 1972-01-12 1975-02-18 Vyzk Vyvojovy Ustav Vseobe D.c. exitation arrangement for a textile machine programmer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419462A (en) * 1944-11-16 1947-04-22 Gen Electric Control system
US2480635A (en) * 1945-08-10 1949-08-30 Raytheon Mfg Co Apparatus for electric welding
US2922896A (en) * 1954-11-03 1960-01-26 Asea Ab Instantaneous reserve aggregates for telecommunication plants
US3079775A (en) * 1956-07-16 1963-03-05 Franz Morat K G Fa Pattern control arrangement for a circular knitting machine
US3170312A (en) * 1963-01-22 1965-02-23 Morat Gmbh Franz Pattern wheel arrangement
US3178632A (en) * 1961-09-26 1965-04-13 Riley D Woodson Continuing power supply system
US3185873A (en) * 1961-10-19 1965-05-25 Morton M Rosenfeld Generator and ventilation means
US3196341A (en) * 1962-10-17 1965-07-20 Ideal Electric And Mfg Company System for generating electric power without interruption

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE446285C (de) * 1927-06-28 Siemens Schuckertwerke G M B H Schutzeinrichtung bei der Speisung von Ortsstromkreisen aus Fernleitungen mit zeitweilig stark schwankender Spannung, z.B. Bahnnetzen, ueber ein umlaufendes Umformeraggregat
FR356423A (fr) * 1904-12-27 1905-11-29 Walter Dixon Perfectionnements à la production et à la distribution de l'électricité
DE432875C (de) * 1924-09-16 1926-08-16 Siemens Schuckertwerke G M B H Verfahren zur Erzeugung von Gleichstrom aus einem Wechselstromnetz, das stark schwankenden Belastungen ausgesetzt ist
DE651059C (de) * 1936-02-14 1937-10-07 Elektromotoren Werke Karl Kais Anordnung zur Unterdrueckung von Lichtschwankungen in Eigenstromerzeugungsanlagen fuer Wechselstrom

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419462A (en) * 1944-11-16 1947-04-22 Gen Electric Control system
US2480635A (en) * 1945-08-10 1949-08-30 Raytheon Mfg Co Apparatus for electric welding
US2922896A (en) * 1954-11-03 1960-01-26 Asea Ab Instantaneous reserve aggregates for telecommunication plants
US3079775A (en) * 1956-07-16 1963-03-05 Franz Morat K G Fa Pattern control arrangement for a circular knitting machine
US3178632A (en) * 1961-09-26 1965-04-13 Riley D Woodson Continuing power supply system
US3185873A (en) * 1961-10-19 1965-05-25 Morton M Rosenfeld Generator and ventilation means
US3196341A (en) * 1962-10-17 1965-07-20 Ideal Electric And Mfg Company System for generating electric power without interruption
US3170312A (en) * 1963-01-22 1965-02-23 Morat Gmbh Franz Pattern wheel arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866442A (en) * 1972-01-12 1975-02-18 Vyzk Vyvojovy Ustav Vseobe D.c. exitation arrangement for a textile machine programmer

Also Published As

Publication number Publication date
CH421364A (de) 1966-09-30
GB1046342A (en) 1966-10-26
DE1254809B (de) 1967-11-23
BE652210A (ja) 1965-02-24
AT267034B (de) 1968-12-10
JPS503426B1 (ja) 1975-02-04
NL6409599A (ja) 1965-02-23

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