US3571680A - Yarn tension control device - Google Patents

Yarn tension control device Download PDF

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Publication number
US3571680A
US3571680A US734742A US3571680DA US3571680A US 3571680 A US3571680 A US 3571680A US 734742 A US734742 A US 734742A US 3571680D A US3571680D A US 3571680DA US 3571680 A US3571680 A US 3571680A
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United States
Prior art keywords
yarn
motor
sensing means
tension
tape
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Expired - Lifetime
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US734742A
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English (en)
Inventor
Edward M Tellerman
Nathan J Tellerman
Robert L Handelsman
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Stop Motion Devices Corp
IRO Inc
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Stop Motion Devices Corp
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Assigned to IRO, Inc. reassignment IRO, Inc. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: VANGUARD SUPREME MACHINE CORPORATION A NC CORP.
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions

Definitions

  • Modern day knitting machines are usually equipped with means for automatically stopping the machine when a fault in the knitting process occurs. These means are commonly known as stop motions and are adapted to instantaneously detect knitting faults such as yarn breakage or variations in yarn tension beyond a permissible range.
  • stop motions usually consist of a yarn sensing device which is in operative relation with respect to the yarn in such manner that when the yarn tension exceeds the permissible range, the sensing device will be operative to cause the completion of an electrical circuit which will in turn cause the interruption of the drive motor for the knitting machine. Examples of yarn tension control devices in existence today are shown in US. Pat. Nos.
  • the yarn tension sensing means available in stop motions in current use are usually associated with spring means which define a mechanical force which must be overcome by the yarn sensing device, in response to increased tension of the yarn, before the sensing means becomes operative to activate the stop motion.
  • the permissible yarn tension range is selected by adjusting the spring force acting upon the yarn sensing device.
  • Such mechanical means are not wholly satisfactory because the range of adjustment is limited and accurate selection of a par ticular tension range is not easily obtainable.
  • the yarn sensing device which comprises a pair of eyes or loops through which the yarn is passed, is carried at the end of a tape which is wound onto a roller.
  • increased tension on the yarn will cause the end of the tape to be pulled downwardly, unwinding the roller.
  • the yarn portion between the loops supports a fly wire or tongue which is pivotally mounted so that when it is unsupported, it is gravitationally biased to a position in which it is operative by means of a contact finger to close a contact for completing an electrical circuit which in turn is operative to activate the stop motion.
  • the yarn portion between the loops supports the tongue to prevent the latter from completing the stop motion activating electrical circuit.
  • the tape carrying roller is driven by a motor provided with control means so that said motor can be operated to move the tape either downwardly for gaining easy access to the yarn sensing device, or upwardly so that the yarn sensing device can be restored to its normal operating condition.
  • the motor control means can be adjusted so as to apply to the tape an upward force which would have to be overcome by increased yam tension before the yarn sensing device can move downwardly in order to activate the stop motion.
  • This static force imparted to the tape can be varied electrically by controlling the amount of current flow through the motor and in this manner the permissible tension on the yarn can be adjusted accurately and within a far greater range than is available by the spring means used in connection with conventional-yam sensing devices as aforedescribed.
  • the upward force applied to the tape through the motor remains constant as it is not a function of the movement of the tape, thus preventing the occurrence of undesirable oscillations and fluctuations in the yarn sensing device during the operationof the machine. Because adjustment of tension range is a matter of electrical motor control, the latter can be located in an easily accessible location though the normal location of the yarn sensing device is not easily accessible.
  • FIG I is a schematic representation of the yarn tension control device in accordance with the invention.
  • FIG. 2 is a circuit diagram of the control circuitry for the yarn tension control device in accordance with the invention.
  • FIG. 3 is a front elevation view of the preferred embodiment in accordance with the invention, with part of the front wall removed for purposes of illustration;
  • FIG. 4 is a right side view thereof
  • FIG. 5 is a top view thereof, with the top wall removed, for purposes of illustration;
  • FIG. 6 is a section taken along line 6-6 of FIG. 3;
  • FIG. 7 is a section taken along line 77 of FIG. 3;
  • FIG. 8 is a view similar to FIG. 7 showing the yarn tension control device in condition for activating the stop motion
  • FIG. 9 is a perspective view, on an enlarged scale, showing the manner in which the yarn sensing member is attached to the end of the tape.
  • FIG. lid is a view similar to FIG. 8 showing a modified embodiment of the invention DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a roller Ill on which there is wound a tape I2, the end of which is provided with a yarn sensing member I4 having a pair of laterally offset spaced loops 16 through which is passed yarn I8 as it proceeds from the supply thereof to the knitting machine.
  • the tape is in its uppermost position as shown by the full lines in FIG. I, which uppermost position is determined by the engagement of stop means 20 on the tape and roller housing 22.
  • a wire 24 is pivotally mounted as at 26 to housing 22 and is supported, during normal operation,
  • portion 28 of wire Zn, on the opposite side of pivot 26, is out of engagement with electrical contact 36).
  • the operation of the yarn tension control device is as follows: The desired yarn tension beyond which the stop motion is intended to be activated is adjusted through motor control 34, providing the requisite net static upward force on the tape.
  • motor control 34 providing the requisite net static upward force on the tape.
  • the yarn tension exceeds the permissible range, the yarn passing though loop to pulls the latter down unwinding tape i2, until the yarn between loop 16 is no longer in the path of movement of wire 2d, as shown by the dashed lines in FIG. 1, causing wire 24 to pivot under the action of gravity until portion 23 thereof engages contact 30 to complete a circuit through stop motion 36 which, as previously explained, automaticaily interrupts the drive motor for the knitting machine.
  • a lamp may be provided in series with contact 30 so that the latter will be lit upon activation of the stop motion to provide an immediate visual signal of the location of the activated yarn tension control device.
  • Tape i2 is of sufficient length os that, if desired, roller 10 can be unwound under the control of motor 32 to lower yam engaging loops lie to a level where these are easily accessible for inspection, rethreading, or any other purpose, eliminating the inconvenience usually caused by the inaccessibility of the yarn sensing device.
  • the tape can easily be wound onto roller 10 under control of motor 32 with maximum speed and convenience.
  • Motor 32 is thus seen as performing the function of lowering and raising the tape as well as imparting to the tape a selected net upward force for adjusting the permissible yarn tension.
  • the manner in which the motor is controlled will now be described with reference to the circuit diagram of motor control 24 as shown in H6. 2.
  • motor 32 and the manner in which it is controlled by the circuitry in motor control 3d.
  • Motor M is a conventional DC motor which can rotatein either direction depending on the direction of current flow therethrough. As shown in H0. 2, current flow downwardly through motor M as shown by arrow D will cause the motor to rotate so as to unwind tape 12 (moving the tape downwardly). Conversely, current flow upwardly through the motor in FlG. 2 as shown by arrow U will cause the motor to rotate so as to wind up tape 12 (moving the tape upwardly).
  • a relay 40 controls a pair of switches 42 and 44 as follows: When relay 40 is unenergized, switches 42 and 44 are in the position as shown in FIG. 2, in engagement with contacts 46 and 48, respectively. When relay 40 is energized, switches 42 and 44 are in engagement with contacts 50 and 52, respectively.
  • a toggle switch 54 operates switch blades 56 and 58 so that they are movable from the position as shown in FIG. 2 in which they engage contacts 60 and 62, respectively, to their other position in which they are in engagement with contact 64 and dummy contact 66, respectively.
  • Resistors 68, 70 and 72 are conventionally adjustable resistors while resistor 74, cooperates with movable contact arm 76.
  • Pushbuttons 78 and Eh are normaliy biased in the position shown in FIG. 2 in which they engage contact 82 and dummy contact 84, respectively, and are independently manually movable into engagement with contacts 36 and 88, respectively.
  • a battery Pi is provided for supplying power to motor M and the control circuit therefor.
  • a pair of diodes 92 and 94 perform their conventional function of permitting current flow in only one direction, as shown.
  • motor M performs the function of 1) moving the tape downwardly, (2) moving the tape upwardly, and (3) applying a static force on the tape in order to adjust the permissible tension on the yarn. The manner in which these three functions are performed by the motor, through motor control 34, will be described.
  • Such complete current flow path causes motor M to turn in a direction to unwind the tape for so long as pushbutton 78 is depressed
  • Variable resistor 70 controls the amount of current flow through motor 32 while pushbutton 78 is depressed, to in turn control the speed at which the tape is unwound.
  • Such upward movement is obtained by depressing pushbutton so that it engages contact 88.
  • the depression of pushbutton 80 completes the following circuit: Positive terminal of battery 90, terminal 98, terminal 100, relay 40, terminal 102, diode 94, contact 8%, pushbutton 80, and back to the negative terminal of battery 90.
  • This circuit path energizes relay 40 which in turn causes switches 42 and 44 to engate contacts 50 and 52, respectively, and in turn completing the following circuit: Positive terminal of battery 90, terminal 9%, terminal 104), contact 52, switch 44, up through motor M, switch 42, contact 50, terminal 96, terminal Hi4, variable resistor 72, diode 92, terminal 106, contact fig, pushbutton 80 and back to the negative terminal of battery 90.
  • Such complete path permits current flow through motor M in a direction to move the tape upwardly with resistor 72 being adjustable to control the speed of the movement of the tape.
  • Adjustment of the force on the tape to increase the same is obtained by placing the toggle switch in the position as shown in Fit]. 2 wherein blades as and 58 are in engagement with contacts dd and 62, respectively. in such position, there is current flow through the following path: Battery 90, terminal 98, terminal Mid, relay db, terminal MP2, switch blade 5%, contact 62, pushbutton 725 (in its normally undepressed position) and back to the battery.
  • This completed path energizes relay dd causing switches 42 and id thereof to engage contacts 50 and 52, respectively, in turn permitting current flow through the motor as follows: Battery 9h, terminal MM), contact 52, switch d4, up through motor M, switch 42, contact 5%, terminal 96, terminal Mid, switch blade 56, contact 64), resistor 74, contact arm 76, terminal lid and back to the battery.
  • Adjustment of the force on the tape to decrease the same is obtained by placing the toggle switch in position in which blades 56 and 58 thereof are in engagement with contact 64 and dummy contact 66 respectively. in such position of toggle switch dd, there is no current flow. through relay 40 whereby switches 32 and dd thereof remain in engagement with contacts id and dd, respectively. in such condition, there is current flow as follows: Battery 9i), terminal 98, contact 46, switch d2, down through motor M, switch dd, contact 48, terminal as, terminal 1W8, switch blade 56, contact 64, variable resistor 68, resistor 7d, movable contact arm 76 terminal 110 and back to the battery. This circuit path provides current flow through the motor in a direction to move the tape downwardly.
  • the amount of force provided by the motor is adjusted by movable arm 76 and in this connection it should be noted that the amount of current flow through motor M should be such as to provide a downward force on the tape less than the normal frictional force acting up on the tape, in order to prevent the tape from physically moving downwardly.
  • Variable resistor dd in series with the motor for 68, adjustment function thereof, limits current flow through the motor in order to prevent over running of the tape downwardly during the adjustment function.
  • motor 32 permits motor 32 to perform all of its intended functions, namely, (ll) lowering the tape to gain convenient access to the yarn sensing device attached at the end of the tape, (2) raising the tape to restore it to its normal uppermost operating position, and (3) providing a static vertical force on the tape both upwardly and downwardly in order to provide accurate adjustment of the permissible tension for a substantial range.
  • Control device M2 comprising a generally rectangular housing lid made up of upper and lower sections Md and lid secured together by means of bolts llZd. Housing illli is provided with a toggle clamp H22 for securement to the channel member of a current supplying stop motion head used on a knitting machine such as shown in US. Pat. No. 3,001,389, assigned to the assignee hereof. As described in said US. Pat. No.
  • a DC motor 1% mounted in housing HM by means of bracket 1357, is adapted to drive roller 1% through the intermediary of pinion M0 mounted on the motor shaft, and gear i412 mounted on roller shaft 138.
  • Power for motor E36 is supplied by means of motor control 3 (previously described in connection with FIG. 2) through which the motor can be operated to wind the tape onto roller 126, to unwind such roller, or to apply a static force to tape 128.
  • the yarn sensing member 131 is in its uppermost position defined by the physical engagement thereof with housing 114 as best shown in FIGS. 3, 6 and 7.
  • Yarn 1144 whose tension is to be controlled, is passed through loops 134 on its way to the knitting machine. ln view of the pigtail construction of the loops, the yarn can be threaded therethrough without requiring a break in the yarn.
  • a tongue M6 is pivotally mounted as at 148 and projects outwardly of bottom wall 129, said tongue being provided with a contact finger 152 extending from pivot Md inwardly of the housing. Contact finger 152 is electrically grounded to the housing through pivot 148.
  • a conductor strip 154 is mounted on terminal 156 insulated from the housing.
  • Lamp 160 is in turn electrically conducting to conducting element E62, which terminates in a conducting surface 163 positioned so that when housing 114 is fully asembled, it comes into electrical contact with conducting element 116d which is in electrical contact with element 1241 on the clamp H22. Accordingly, it will be seen that the engagement of contact finger 152 with conductor strip H54 completes an electrical path from contact element 124 on the clamp to ground. It will be understood that the completion of such circuit by means of clamp 122 permits current flow for lighting lamp M0 and activates the stop motion mechanism to immediately interrupt the drive of the knitting machine. Thus, it is clear that the increase in yarn tension beyond the permissible range, adjusted by motor control 341 as described in connection with MG.
  • backing plate 135 may be provided with rearwardly extending apertured flanges E65 for receiving therethrough guide rod 166 downwardly extending from bottom wall 129 of the housing.
  • motor control 34 various resistances forming part of motor control 34 are selected so as to provide a highly sensitive range of adjustment for the yarn tension control, and the motor control is provided with conventional calibrated members associated with all the variable resistors for providing the requisite visual indication.
  • the yarn sensing element is displaceable for a substantial range of movement while retaining the yarn through the loops, making subsequent rethreading unnecessary, in contrast with conventional yarn sensing elements whose displacement is severely limited, resulting in loss of yarn retention.
  • Yarn tension control means for controlling the tension in yarn travelling from a source of supply to a work station on a knitting machine comprising:
  • said yarn sensing means being movable from a normal operating position thereof in response to increased yarn tension to another position thereof in which it is operative to cause the activation of a stop motion for interrupting the knitting machine drive;
  • an electrically operated means operatively connected to said yarn sensing means for supplying thereto a preselected force for selectively controlling the net force opposing the movement of said yarn sensing means in response to increased yarn tension, whereby to selectively adjust the tension in said yarn, beyond which stop motion is activated;
  • said yarn sensing means being attached to support means therefor adapted to move downwardly in unison with said yarn sensing means, in response to said increased yarn tension;
  • said support means comprising a tape, wound onto a reel therefor, the end of said tape having said yarn sensing means attached thereto.
  • said electrically operated means comprises an electric motor operatively connected to said reel, and motor control circuitry for selectively adjusting the direction and magnitude of rotational force applied to said reel for correspondingly selectively adjusting the direction and magnitude of lineal force applied to the free end of said tape and to said yarn sensing means.
  • Yarn tension control means in accordance with claim 2, wherein there is provided a contact member adapted to be normally supported by the travelling yarn portion which is in engagement with the yarn sensing means when the latter is in said normal operating position thereof, said contact member being automatically movable to a stop motion circuit completing position thereof when said yarn sensing means is moved to said another position thereof in response to an increase in yarn tension which overcomes the opposing force selectively applied to said yarn sensing means by said electric motor.
  • said motor control circuitry comprises:
  • a first pushbutton operative, when depressed, to energize said relay for placing said pair of switches in said first position for providing current flow through said motor in said one direction;
  • switch means operable, when said pushbuttons are undepressed, to selectively energize and deenergize said relay and to simultaneously place in circuit with said motor adjustable resistor means, for selectively controlling the amount of current flow through said motor.
  • Yarn tension control means for controlling the tension in yarn travelling from a source of supply to a work station on a knitting machine comprising:
  • said yarn sensing means being movable from a normal operating position thereof in response to increased yarn tension to another position thereof in which it is operative to cause the activation of a stop motion for interrupting the knitting machine drive;
  • electrically operated means operatively connected to said yarn sensing means for applying thereto a preselected force for selectively controlling the net force opposing the movement of said yarn sensing means in response to increased yarn tension, whereby to selectively adjust the tension in said yarn, beyond which said stop motion is activated;
  • Yarn tension control means in accordance with claim 5, wherein said yarn sensing means comprises a pair of spaced loops through which the travelling yarn is passed and wherein said contact member includes a tongue normally supported by the portion of the travelling yarn between said loops.
  • Yarn tension control means for controlling the tension in yarn travelling from a source of supply to a work station on a knitting machine comprising:
  • yarn sensing means attached to the free end of said tape and adapted to be operatively engaged by said travelling yarn, said yarn sensing means being movable from a normal operating position thereof in response to increased yarn tension of said travelling yarn;
  • a contact member adapted to be supported by the travelling yarn portion in engagement with said yarn sensing means when the latter is in said normal operating position thereof, said contact member being movable, when unsupported by said travelling yarn portion, to a position in which it causes the energization of said electrical circuit means;
  • g. means for selectively controlling the net force opposing the movement of said yarn sensing means in response to increased yarn tension, whereby to selectively adjust the tension in said yarn beyond which said stop motion is activated.
  • Yarn tension control means in accordance with claim 8, wherein said means for selectively controlling said net opposing force comprises an electric motor operatively connected to said reel.
  • Yarn tension control means in accordance with claim 10, wherein said motor control circuitry includes means for rotating said reel in one direction, means for rotating said reel in opposite direction, and means for selectively adjusting the magnitude of rotational force applied to said reel.
  • said yarn sensing means comprises a pair of spaced loops through which the travelling yarn is passed and wherein said contact member includes a tongue normally supported by the portion of the travelling yarn between said loops.
  • Yarn tension control means in accordance with claim 13, wherein said means for selectively controlling said net opposing force comprises an electric motor operatively connected to said reel.
  • Yarn tension control means in accordance with claim 14, wherein there is provided motor control circuitry for selectively adjusting the direction and magnitude of rotational force applied to said reel for correspondingly selectively adjusting the direction and magnitude'of linear force applied to the free end of said tape and to said yarn sensing means.
  • a first pushbutton operative, when depressed, to energize said relay for placing said pair of switches in said first position for providing current flow through said motor in said one direction;
  • a second pushbutton operative, when depressed, to prevent energization of said relay for placing said pair of switches in said second position for providing current flow through said motor in said opposite direction;
  • said yarn sensing means being movable from a normal operating position thereof in response to increased yarn tension to another position thereof in which it is operative to cause the activation of a stop motion for interrupting the knitting machine drive;
  • electrically operated means operatively connected to said yarn sensing means for applying thereto a preselected force for selectively controlling the net force opposing the movement of said yarn sensing means in response to increased yarn tension, whereby to selectively adjust the tension in said yarn, beyond which said stop motion is activated;
  • a contact member adapted to be normally supported by the travelling yarn portion which is in engagement with the yarn sensing means when the latter is in said normal operating position thereof, whereby a break in said yarn removes the normal support for said contact member, said contact member being automatically movable, in the absence of said normal support, to a stop motion circuit completing position thereof.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US734742A 1968-06-05 1968-06-05 Yarn tension control device Expired - Lifetime US3571680A (en)

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US73474268A 1968-06-05 1968-06-05

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US (1) US3571680A (ru)
BE (1) BE722159A (ru)
DE (1) DE1800125A1 (ru)
ES (1) ES359254A1 (ru)
FR (1) FR1585364A (ru)
GB (1) GB1211448A (ru)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726113A (en) * 1971-02-04 1973-04-10 Knitting O Co Stop motion apparatus for knitting machines
US3795120A (en) * 1972-10-16 1974-03-05 N Levin Stop motion apparatus for knitting machines
US3851501A (en) * 1973-10-02 1974-12-03 N Levin Stop motion apparatus for knitting machines
US3863466A (en) * 1973-05-07 1975-02-04 Automated Textile Equipment In Apparatus for guiding and feeding filamentary material
US3888095A (en) * 1973-03-16 1975-06-10 Morris Philip Stop motion assembly and method
US4024734A (en) * 1974-10-09 1977-05-24 Trip-Lite Ltd. Yarn fault detectors
US5202610A (en) * 1991-08-30 1993-04-13 Platt Saco Lowell Method and apparatus for yarn end-down detection in a textile yarn winding machine
US5353610A (en) * 1992-07-28 1994-10-11 International Trading S.R.L. Device for controlling the feed of at least one yarn to a textile machine so as to compensate any pulling and excess tension exerted on the yarn
US9856106B1 (en) 2016-06-29 2018-01-02 The Boeing Company Dynamic feeding systems for knitting machines

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US916721A (en) * 1908-04-16 1909-03-30 Felten & Guilleaume Lahmeyerwe Device for tightening of cables.
US2099576A (en) * 1935-09-20 1937-11-16 Gen Electric Control system
US2165111A (en) * 1937-08-28 1939-07-04 Gen Electric Control system
US2242875A (en) * 1940-04-06 1941-05-20 Wachsman Sons Inc Electric stop motion for knitting machines
US2515479A (en) * 1949-06-18 1950-07-18 Stop Motion Devices Corp Stop motion for knitting machines with full range adjustment
US2708256A (en) * 1946-10-24 1955-05-10 Bendix Aviat Corp Motor slack take-up and tensioning mechanism for travelling flexible member
US3343008A (en) * 1964-10-12 1967-09-19 Allied Control Co Filament tension monitoring devices

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US916721A (en) * 1908-04-16 1909-03-30 Felten & Guilleaume Lahmeyerwe Device for tightening of cables.
US2099576A (en) * 1935-09-20 1937-11-16 Gen Electric Control system
US2165111A (en) * 1937-08-28 1939-07-04 Gen Electric Control system
US2242875A (en) * 1940-04-06 1941-05-20 Wachsman Sons Inc Electric stop motion for knitting machines
US2708256A (en) * 1946-10-24 1955-05-10 Bendix Aviat Corp Motor slack take-up and tensioning mechanism for travelling flexible member
US2515479A (en) * 1949-06-18 1950-07-18 Stop Motion Devices Corp Stop motion for knitting machines with full range adjustment
US3343008A (en) * 1964-10-12 1967-09-19 Allied Control Co Filament tension monitoring devices

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726113A (en) * 1971-02-04 1973-04-10 Knitting O Co Stop motion apparatus for knitting machines
US3795120A (en) * 1972-10-16 1974-03-05 N Levin Stop motion apparatus for knitting machines
US3888095A (en) * 1973-03-16 1975-06-10 Morris Philip Stop motion assembly and method
US3863466A (en) * 1973-05-07 1975-02-04 Automated Textile Equipment In Apparatus for guiding and feeding filamentary material
US3851501A (en) * 1973-10-02 1974-12-03 N Levin Stop motion apparatus for knitting machines
US4024734A (en) * 1974-10-09 1977-05-24 Trip-Lite Ltd. Yarn fault detectors
US5202610A (en) * 1991-08-30 1993-04-13 Platt Saco Lowell Method and apparatus for yarn end-down detection in a textile yarn winding machine
US5353610A (en) * 1992-07-28 1994-10-11 International Trading S.R.L. Device for controlling the feed of at least one yarn to a textile machine so as to compensate any pulling and excess tension exerted on the yarn
US9856106B1 (en) 2016-06-29 2018-01-02 The Boeing Company Dynamic feeding systems for knitting machines

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Publication number Publication date
GB1211448A (en) 1970-11-04
BE722159A (ru) 1969-03-14
ES359254A1 (es) 1970-06-01
FR1585364A (ru) 1970-01-16
DE1800125A1 (de) 1970-01-15

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AS Assignment

Owner name: IRO, INC., CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VANGUARD SUPREME MACHINE CORPORATION A NC CORP.;REEL/FRAME:004055/0526

Effective date: 19820621

Owner name: IRO, INC., A CORP.OF CT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:VANGUARD SUPREME MACHINE CORPORATION A NC CORP.;REEL/FRAME:004055/0526

Effective date: 19820621