US3665731A - Electrical pattern mechanism for circular knitting machines - Google Patents

Electrical pattern mechanism for circular knitting machines Download PDF

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Publication number
US3665731A
US3665731A US4675A US3665731DA US3665731A US 3665731 A US3665731 A US 3665731A US 4675 A US4675 A US 4675A US 3665731D A US3665731D A US 3665731DA US 3665731 A US3665731 A US 3665731A
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United States
Prior art keywords
winding
bistable multivibrator
output
knitting
armature
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Expired - Lifetime
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US4675A
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English (en)
Inventor
Gerhard Groezinger
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Mayer and Cie GmbH and Co
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Mayer and Cie GmbH and Co
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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
    • D04B15/66—Devices for determining or controlling patterns ; Program-control arrangements

Definitions

  • Sweep circuit has a p of outputs con nected through one of a pair of univibrators with one of a pair [56] References Cited of electromagnetic windings.
  • One of the univibrators is con- UNITED STATES PATENTS nected with one of these windings together with a time-limited current amplifier circuit. 3,446,037 5/1969 Sutton ..66/25 3,470,714 10/1969 Corbaz ..66/50 R 2 Claims, 1 Drawing Figure Patented May 30; 1972 INVENTOR.
  • the present invention relates to circular knitting machines.
  • the present invention relates to electrical pattern mechanisms for such machines where the latter has a rotary needle cylinder and electromagnetically actuated adjusting or setting components controlled according to a predetermined pattern and acting either directly on needles or on jacks which transmit movement to the needles, a suitable program carrier being provided to deliver the control impulses to the electromagnets which actuate the adjusting components.
  • Electrical pattern mechanisms for knitting machines are controlled according to a predetermined program which is stored on a suitable program carrier such as, for example, a film strip or a punch tape, in a suitably coded form.
  • a suitable program carrier such as, for example, a film strip or a punch tape
  • the knitting operations will be carried out in accordance with a particular program.
  • the selection of the needles which are to operate at the knitting locations of the machine takes place by way of electromagnets and through control or adjusting components actuated by these electromagnets.
  • the excitation of the electromagnets is regulated by the program carrier.
  • a primary object of the present invention is to provide an electrical structure of the above general type which is capable of actuating electromagnets, which control the knitting components, in a fully reliable manner and in accordance with the different information contained in control impulses supplied by a program carrier.
  • a bistable electronic sweep circuit is provided, and the position of this circuit is determined by the information content of a control signal supplied from a program carrier.
  • This sweep circuit has a pair of outputs one of which is connected through a univibrator and a time-limited current amplifier with an electromagnetic winding.
  • the univibrators can take the form of so-called mono-flop circuits.
  • the bistable sweep circuit can be formed in a particularly suitable manner by a so-called flip-flop circuit having a pair of inputs receiving control signals through AND circuits. These inputs of the flip-flop circuit transmit the different control signals from the program carrier and from synchronizing impulses.
  • the time-limited current amplifiers can each be formed by a capacitor and an ohmic resistor which are connected in parallel with each other.
  • the parallel connected capacitor and resistor are in turn placed in series with one of the electromagnetic windings in the emitter/collector path of a transistor, with the parallel connection and the magnetic winding being bridged by a one-way rectifier.
  • the electrical pattern mechanism formed by the structure for transmitting the electronic control signals according to the invention is capable of being used for different electromagnetic actuating devices forming parts of such pattern mechanisms.
  • the components for needle selection or the jacks which control the needles can, for example, take the form of a special electromagnet usedfor pushing in or pulling out a switching component, with the controls derived according to the invention being produced in accordance with the information content of a momentarily effective control signal, particularly an impulse-type control signal, to bring about excitation of one or the other of a pair of. control magnets which respectively produce the different operations.
  • control signal transmission can also be used with a single electromagnet, which has either a pair of special exciting coils of oppositely wound directions or a single exciting coil with a current reversing connection.
  • the latter construction is provided, for example, by a so-called direct current reversing magnet.
  • Each switching magnet or pair of switching magnets of the knitting machine is provided with a control signal transmitting circuit of the invention.
  • the junction 1 is electrically connected with a positive pole of a first source of direct current.
  • the junction 2 is electrically connected with the positive pole of a second source of direct current having a potential which is at least half as small as the potential of the direct current of the first source.
  • the connecting junction 5 is connected with the common negative pole of bothof these direct current sources.
  • the unillustrated program carrier transmits two types of control signals to the connecting junction 3. These two types of control signals are respectively one type of signal providing a knitting signal and a second type of signal providing a non-knitting signal.
  • Both types of control signals can take the form of impulses of different amplitudes or duration, or these signals may simply be characterized by the presence or absence of a control potential.
  • the signals are evaluated in a suitably formed integrating logic circuit 6, so that the knitting impulse activates the input 71 of an AND gate 7 while the non-knitting" control signal activates the input 81 of a second AND gate 8.
  • the other inputs 72 and 82 of both of the AND gates 7 and 8 are activated through synchronizing impulses which are supplied in accordance with the speed of rotation of the circular machine and are transmitted through the connecting junction 4 into the circuit .6.
  • This integrated logic input circuit 6 is electrically connected with a known sweep circuit in the form of a flip-flop circuit or bistable multivibrator 1 1 made up of a pair of transistors 9 and 10.
  • This flip-flop circuit 11 has one input 111 leading to the base of the transistor 9 and connected through a diode 12 with the output 83 of the AND gate 8.
  • the second input 112 of the flip fl0p circuit 11 is connected through a diode 13 with the output 73 of the AND gate 7.
  • This input 112 leads in a known way to the base of the other transistor 10 of the sweep circuit 1 l.
  • circuit 16 consists primarily of a pair of transistors 161, 162 and a countercoupling capacitor 163.
  • Circuit 17 includes transistors 171, 172 and a counter-coupling capacitor 173.
  • the outputs 164 1 and 174 are respectively connected with the base of power transistors 18- and 19.
  • the emitter/collector paths of the power transistors 18 and 19, which act as switching means, are respectively in series with a parallel connection between ohmic resistors 20 and 21 and a capacitor 22 and 23 and in series with an electromagnetic winding 24 and 25 between the connecting junctions and 1 of the circuit.
  • the collectors of both power transistors 18 and 19 are respectively connected through one-way rectifier 26 and 27 with the connecting junction 1.
  • the connecting junction 3 receives a non-knitting control signal
  • the input 81 of the AND gate 8 is activated.
  • this AND gate 8 supplies at its output 83 during the simultaneous activation of both inputs 81 and 82 an output signal which reaches the base of the transistor 9 of the flip-flop circuit 11 and blocks this transistor 9.
  • the circuit 11 changes over to its other stable condition in which the transistor is conductive and thus the output potential present at the output 1 13 of the flip-flop circuit 1 l deteriorates and disappears.
  • the decreasing leg of the output signal brings about a switching of the mono-flop circuit 16 which is laid out in such a way that it changes its stable condition for a predetermined relatively short time and during this time opens the power transistor 18.
  • thecapacitor 22 With the opening of the power transistor 18 thecapacitor 22 becomes charged, this capacitor 22 being in parallel with the ohmic resistor 20 and thus practically bridging the resistor 20 during the charging operation.
  • the resistor 20 is therefore, during the period of charging of capacitor 22, not effective as series resistance for the electromagnetic winding 24, so that this winding 24 which is normally designed for the potential at the junction 2 will instead receive the higher potential at the junction 1 which is connected with the first of the above-mentioned sources of direct current, so that the winding 24 is excited with an overpotential.
  • the pair of electromagnetic windings 24 and 25 can, for example, take the form of special exciting windings of a common control magnet, but have different directions of winding so that with the one winding the armature of the magnet is brought into a first control position while with the other winding the armature of the magnet is brought into its opposed second control position.
  • the pair of electromagnetic windings 24 and 25 can, however, also take the form of special electromagnets which operate upon a common control element to move the latter in different directions. Both the windings 24 and 24 can, however, also symbolize different excitation conditions of a single exiting coil of a direct current reversin ma et.
  • a ve-descnbed control signal transmitting circuit of the invention used in an electrical pattern mechanism of a knitting machine, there is a reliable separation between the control signals in accordance with the information content thereof, and the electrical control magnets are very reliable actuated. Moreover, once the circuit of the invention excitation of the magnets will take place only when there is a change in the control signal. Thus, when the signal changes from non-knitting" to knitting" or the reverse, the result will be excitation of the control magnets in the manner described above.
  • a series of the same type of control signals in other words, a series of knitting" signals following each other or a series of non-knitting" signals following one another, will thus not produce a series of the same type of excitation of the electromagnets, because such a series of the same signals will not actuate the flip-flop circuit. In this way, there is a very significant saving of energy and a corresponding reduction in the heating of the electromagnets. The power loss of an electrical pattern mechanism thus can be very considerably reduced with the present invention.
  • apparatus for selectively positioning a needle-actuating 'magnetic armature between first and second positions in response to transitions between first and second control signals individually indicative of knitting and non-knitting commands, which comprises:
  • first and second separately excitable control windings electromagnetically associated with the armature for moving the armature from the first to the second position when the first winding is excited and for moving the armature from the second to the first position when the second winding is excited;
  • a bistable multivibrator having first and second complementary inputs and first and second complementary outputs;
  • means including first and second normally disabled switching means for individually exciting the first and second windings when the switching means are enabled; means responsive to the first output of the bistable multivibrator for enabling the first switching means; and means responsive to the second output of the bistable multivibrator for enabling the second switching means.
  • bistable multivibrator whose output states are determined by the control signals supplied by the program carrier;
  • a monostable multivibrator having an input connected to an output of the bistable multivibrator
  • winding excitation means including means for serially connecting the resistor, the winding, and the collectoremitter path of the transistor;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Prostheses (AREA)
  • Magnetic Treatment Devices (AREA)
US4675A 1969-01-24 1970-01-21 Electrical pattern mechanism for circular knitting machines Expired - Lifetime US3665731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691903432 DE1903432A1 (de) 1969-01-24 1969-01-24 Elektrische Mustervorrichtung fuer Rundstrickmaschinen

Publications (1)

Publication Number Publication Date
US3665731A true US3665731A (en) 1972-05-30

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ID=5723257

Family Applications (1)

Application Number Title Priority Date Filing Date
US4675A Expired - Lifetime US3665731A (en) 1969-01-24 1970-01-21 Electrical pattern mechanism for circular knitting machines

Country Status (6)

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US (1) US3665731A (de)
CH (1) CH503821A (de)
DE (1) DE1903432A1 (de)
ES (1) ES375557A1 (de)
FR (1) FR2030187A1 (de)
GB (1) GB1243952A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807197A (en) * 1970-10-05 1974-04-30 Mayer & Cie Maschinenfabrik Pattern selector apparatus for a circular knitting machine
US3874198A (en) * 1971-04-30 1975-04-01 Elitex Zavody Textilniho Apparatus for regulating pulsatory operation of an electromagnet in a circular knitting machine
US3955383A (en) * 1974-03-14 1976-05-11 Kabushiki Kaisha Toyota Chuo Kenkyusho Signal generator for circular pattern knitting machines
US3955384A (en) * 1974-03-14 1976-05-11 Kabushiki Kaisha Toyota Chuo Kenkyusho Needle selection control apparatus for circular pattern knitting machines
US4004439A (en) * 1968-04-05 1977-01-25 Wildt Mellor Bromley Limited Of Adelaide Works Pattern mechanism
US4739636A (en) * 1984-08-06 1988-04-26 Cesare Colosio S.R.L. Circular knitting machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1474081A (fr) * 1966-02-03 1967-03-24 Métier à tricoter circulaire
FR1486978A (fr) * 1966-07-19 1967-06-30 Elitex Zavody Textilniho Dispositif de lecture de modèle pour machine à tricoter circulaire à magasin électronique ainsi que machine pourvue dudit dispositif
US3446037A (en) * 1965-03-05 1969-05-27 Stibbe G & Co Ltd Patterning system for knitting machines
US3470714A (en) * 1964-02-04 1969-10-07 Andre Corbaz Method of and an apparatus for controlling electromechanical organ with on-off operation in accordance with a digital program in a machine having a variable operating speed
DE1917574A1 (de) * 1968-04-05 1969-11-06 Wildt Mellor Bromley Ltd Strickmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470714A (en) * 1964-02-04 1969-10-07 Andre Corbaz Method of and an apparatus for controlling electromechanical organ with on-off operation in accordance with a digital program in a machine having a variable operating speed
US3446037A (en) * 1965-03-05 1969-05-27 Stibbe G & Co Ltd Patterning system for knitting machines
FR1474081A (fr) * 1966-02-03 1967-03-24 Métier à tricoter circulaire
FR1486978A (fr) * 1966-07-19 1967-06-30 Elitex Zavody Textilniho Dispositif de lecture de modèle pour machine à tricoter circulaire à magasin électronique ainsi que machine pourvue dudit dispositif
DE1917574A1 (de) * 1968-04-05 1969-11-06 Wildt Mellor Bromley Ltd Strickmaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004439A (en) * 1968-04-05 1977-01-25 Wildt Mellor Bromley Limited Of Adelaide Works Pattern mechanism
US3807197A (en) * 1970-10-05 1974-04-30 Mayer & Cie Maschinenfabrik Pattern selector apparatus for a circular knitting machine
US3874198A (en) * 1971-04-30 1975-04-01 Elitex Zavody Textilniho Apparatus for regulating pulsatory operation of an electromagnet in a circular knitting machine
US3955383A (en) * 1974-03-14 1976-05-11 Kabushiki Kaisha Toyota Chuo Kenkyusho Signal generator for circular pattern knitting machines
US3955384A (en) * 1974-03-14 1976-05-11 Kabushiki Kaisha Toyota Chuo Kenkyusho Needle selection control apparatus for circular pattern knitting machines
US4739636A (en) * 1984-08-06 1988-04-26 Cesare Colosio S.R.L. Circular knitting machine

Also Published As

Publication number Publication date
CH503821A (de) 1971-02-28
DE1903432A1 (de) 1970-08-20
FR2030187A1 (de) 1970-10-30
GB1243952A (en) 1971-08-25
ES375557A1 (es) 1972-10-16
DE1903432B2 (de) 1970-11-19

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