US2353639A - Method of and apparatus for controlling spooling motors - Google Patents

Method of and apparatus for controlling spooling motors Download PDF

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US2353639A
US2353639A US420768A US42076841A US2353639A US 2353639 A US2353639 A US 2353639A US 420768 A US420768 A US 420768A US 42076841 A US42076841 A US 42076841A US 2353639 A US2353639 A US 2353639A
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motor
tension
takeup
wire
strand
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US420768A
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Berthold Wolf
Wilson W Rea
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AT&T Corp
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Western Electric Co Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B21C1/12Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/003Regulation of tension or speed; Braking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/38Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
    • B65H59/384Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using electronic means

Definitions

  • This invention relates to a method of and apparatus for controlling spooling motors and more particularly to a method of and apparatus for controlling the takeup spool operation of a wire drawing machine.
  • the wire ten- Furthermore, there have been continued atsion-time curve. tempts to draw greater lengths of wire without In the drawing, the numeral 5 designates a breakage in the wire, resulting in the use of rela pp SD00 ⁇ On which there is Wound a pp y tively large spools having drums of small diamof relatively coarse Wire 6- u a y m unted eter so that the spool will hold a large amount djacent the supp y S9 5 is a -S p d uide of fine wire.
  • l2- spool is ccntrolled by varying the torque of the Cooperating With thfi guide roller '2' is a movable spooler motor in cycles between a relatively high guide roller [3, mounted upon a tension or upp value and a relatively low value, to maintain a Cushioning arm Which s, in turn, p ed at controlled slip on the last capstan and thereby W
  • the arm 14, which s p r s t e uide roller maintaining the tension in the wire between the l3, is normally held in predetermined p ion capstan and takeup spool substantially constant by cooperating p in 5 and IT and carries a throughout most of the cycle of the apparatus, 40 cond guide roller Ill.
  • the decrease in motor torque is initiated, in ac- The Wire, after being passed around One Of the eo an it t present th by by passmg idler guide rollers on the cushionin arm i4 is rtio of th resistance of h poofing t r directed to an idler roller I9, back to the other rotor circuit under control of a tension arm beroller 0h and down 150 t e d s r butor 24.
  • the tween th capstan of the wire drawing apparatus idler roller I9 is mounted on a cushioning arm and the takeup spool, which tension arm will close 29, Similar to the arm the arm 20 being D a circuit to a slow to release or time delay relay Oiled at 2
  • the Cushioning arms y be moved relay, upon being energized, will cut out a portio on relatively close together, at which time there will of the resistance in the rotor circuit for a definite short period of time and since the motor normally operates on the portion of its speed torque curve where both speed and torque are descending, the by-passing of part of its resistance will reduce its be a comparatively short length of wire between the fixed idler l2 and a distributor 24, or when the tension on the Wire is released somewhat, a relatively large amount of wire may be held under a definite tension between the roller l2 and the distributor 24 due to the displacement of the cushioning arms 14 and Ill and the guide rollers carried by them away from each other.
  • the distributor 24, which is shown diagrammatically, distributes the wire over the face of the takeup spool 25 mounted upon a shaft 25 and adapted to be driven by a spooler motor 21.
  • the shaft 25 also has mounted on it an electromagnetic type of clutch 25, which, upon energization, will connect the shaft 15 directly to a sheave 29, thereby to connect the shaft 25 through a driving element 30 to a shaft 41, which interconnects the motor II and capstan 9, the shaft 3
  • This just described magnetic clutch and driving connection serves to connect the capstan and takeup spool during the starting periods of the machine, suitable interlocks being illustrated diagrammatically at 33. These interlocks may be of the type disclosed in the co-pending application of C. O.
  • Haase No. 292,787 filed August 31, 1939, now Patent No. 2,266,861, issued December 23, 1941, or may be of any other suitable type which will serve to positively interconnect the takeup spool and capstan during the periods of acceleration on the starting of the apparatus. Any suitable means may be utilized for controlling the apparatus during deceleration, but since it does not pertain to the present invention, it has not been shown.
  • the electromagnetic clutch 28 will be deenergized and the motor 21, which is preferably a 3 phase induction motor, will control the speed of the takeup spool or reel 25.
  • the motor 21 has its stator field supplied with current through the leads 34, 35 and 36 and normally has the resistances 60, ii and 42 connected in its rotor circuit through the break contacts of a relay 43, which may be of the slow to release type or may be a time relay settable to release after a predetermined interval upon being energized.
  • a relay 43 which may be of the slow to release type or may be a time relay settable to release after a predetermined interval upon being energized.
  • this device has been shown in the form of a slow to release relay in order to simplify the disclosure, but it will be understood that any suitable time delay relay may be substituted for the slow to release relay.
  • the relay 43 has one side of its winding connected to ground at 44 and has the other side of its winding connected to one terminal of a highly sensitive switching device 54 comprising contacts 45 and 45.
  • the con tact 45 is connected to the winding of the relay 43 and is positioned to be closed by an extending portion 41 of the cushioning arm 14 when the tension in the wire between the distributor 24 and guide roller 12 reaches a predetermined relatively high value.
  • the contact 46 of switch 54 is connected to grounded battery at 48 and when the switch 54 closes, the grounded battery at 48 will be connected through the winding of the relay 43 to ground at 44 to energize the relay 43, thus by-passing part of the resistance of the rotor circuit of motor 21.
  • the curve illustrating wire speed has been exaggerated; that is, the decrease in the time during which the resistance is normal in the rotor circuit of motor 21 has been shown as decreasing quite rapidly to bring out the fact that while the time interval during which part of the resistance of the rotor circuit of the spooler motor is by-passed is constant, the time intervals during which the resistance is in the rotor circuit of the spooler motor decreases gradually as the takeup spool 25 goes from an empty to a full condition.
  • a method of controlling the tension of a strand in a takeup mechanism which comprises increasing the tension until it reaches a predetermined upper limit and then decreasing the tension a predetermined amount for a predetermined time, and repeating these steps to obtain a selected average tension.
  • the method of controlling the speed of a takeup spool motor relative to an associated material working apparatus which comprises applying a relatively high torque to the motor of the takeup spool tending to place the material under tension between the working apparatus and takeup spool, decreasing the resistance of the circuit of the spool motor in response to a predetermined tension in the material, and maintaining said lower resistance in the spool motor circuit for a definite length of time, thereby to alternately apply a high and low torque to the spool.
  • a method of controlling the range of tension of a strand in a takeup mechanism which comprises automatically varying the speed of the strand between fixed high and low values, initiating the low speed condition at intervals in response to a predetermined increase in tension on the strand, and maintaining said low speed condition for predetermined definite intervals.
  • a method of controlling the range of tension of a strand in a takeup mechanism which comprises automatically varying the speed of the strand between high and low values, initiating the low speed condition at intervals in response to a predetermined increase in tension on the strand, and maintaining said low speed condition for the same interval of time after each initiation thereof.
  • a method of controlling the tension or a strand between a strand working apparatus and a takeup mechanism which comprises maintaining a variable supply of strand between the working apparatus and takeup mechanism, reducing the amount of said supply to a predetermined amount, then increasing said supply at a predetermined rate for a definite time interval, and repeating these steps alternately to obtain a tension within a selected range.
  • a takeup spool In a strand takeup mechanism, a takeup spool, a motor for driving said spool, a tension arm movable in response to tension in the strand,
  • a takeup spool in a strand takeup mechanism, a takeup spool, a motor for driving the spool, means responsive each time the strand is subjected to a predetermined amount of tension for decreasing the torque output of the motor by a predetermined amount, and means for maintaining the tension responsive means effective for a predetermined interval of time each time it is rendered effective by the tension of the strand reaching said predetermined amount.
  • a takeup spool a takeup spool, a motor for driving the takeup spool, resiliently supported means for maintaining a loop of strand adjacent the takeup spool.
  • a takeup spool a takeup spool, a motor for driving the takeup spool, resiliently supported means for maintaining a loop of strand adjacent the takeup spool, means actuated by the resiliently mounted means in response to a predetermined tension in the loop for reducing the torque of the motor to increase the size of said loop, and means for maintaining said last mentioned means operative for a predetermined length of time.
  • a takeup motor operable in the portion of its speed-torque curve where torque and speed are increasing, said motor having a rotor resistance of a definite value, a takeup spool driven by said motor, guiding means for supporting a variable supply of strand adjacent said takeup spool, means actuated by the guiding means for by-passing a portion of the resistance of the rotor circuit of the motor to decrease the torque of the motor, and means for holding the last mentioned means operative for a predetermined length of time to increase the supply of strand supported by guiding means.
  • a methodof controlling the tension of a strand in a takeup mechanism which comprises driving the takeup mechanism at a relatively high speed until the tension in the strand reaches a predetermined upper limit and then decreasing the speed of the takeup mechanism to a predetermined fixed speed for a fixed time, and repeating these steps to obtain a selected average tension in the strand.
  • a takeup spool In a strand takeup mechanism, a takeup spool, a motor for driving said spool, a tension arm movable in response to tension in the strand, means for varying the speed at which the motor drives said spool, and means actuated by the tension arm for rendering said last mentioned means operative for a definite interval of time each time the tension arm actuates it.
  • a takeup spool In a strand takeup mechanism, a takeup spool, a drive motor for drivingthe takeup spool,
  • means for maintaining a loop of strand acfiacent the takeup spool means operable by the means for maintaining a loop of strand when the size of the loop is decreased a predetermined amount for decreasing the speed of the motor, and means associated with said last-mentioned means for maintaining said last-mentioned means operative for a predetermined time interval.
  • a takeup spool In a strand takeup mechanism, a takeup spool, a motor for driving said takeup spool, re-
  • siliently supported means for maintaining a loop of strand adjacent the take-up spool, means operable by said resiliently supported means when a predetermined decrease in the size of said loop occurs for decreasing the speed of said motor, and means associated with said last-mentioned means for maintaining said last mentioned means operative for a predetermined time interval/ WOLF BERTHOLD.

Description

July 18, 1944. w. BERTHOLD ET AL 2,353,639
METHOD OF AND APPARATUS FOR CONTROLLING SPOOLING MOTORS Filed Nov. 28, 1941 FULL REEL EMPTY REEL F/aE [XACT T0741. LOAD 7080 LOW MOTOR TdkQl/far M07017 2 F763 ANGULAR VELOCITY JTART PER/0D f MR5 .srzso w/m sup a CAISI'AN Y ,w/Rs sum N0 sur o/v CAPSTAI/ q km E T 1 I T I I RELAY 4 J M F H SETTING TIME RELAY or C76!!! 7 6751.5 C :64! Cglb' C YCLE 756 E 3%M1 rm: DELAY RELAY cwsea IMIHWORS 3 F164 W. BERTHOLD 3 w. w. REA 4 7 rms- ATM/W 7 Patented July 18, 1944 METHOD OF AND APPARATUS FOR CON- TROLLING SPOOLING MOTORS Wolf Berthoid, Weehawken, and Wilson W. Rea, Chatham, N. J., assignors to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application November 28, 1941, Serial No. 420,768
14 Claims.
This invention relates to a method of and apparatus for controlling spooling motors and more particularly to a method of and apparatus for controlling the takeup spool operation of a wire drawing machine.
In the operation of modern high speed wire drawing machines used in the manufacture of fine wire, it has been the practice, in some instances, to permit the wire on the last step of the wire drawing capstan to slip slightly in order in accordance with the p esent m t o to prevent breakage of the wire. In order to per- Fig. 2 shows, diagrammatically, the speed mit this slip, it is essential that the takeup mechto que curve of the Spooler motor; anism does not apply excessive tension to the Fi 3sh w mm i y, t wire pee wire and that the average wire speed be held me Curve, and lower than the surface speed of the last capstan. Fig. 4 s m tically, the wire ten- Furthermore, there have been continued atsion-time curve. tempts to draw greater lengths of wire without In the drawing, the numeral 5 designates a breakage in the wire, resulting in the use of rela pp SD00} On which there is Wound a pp y tively large spools having drums of small diamof relatively coarse Wire 6- u a y m unted eter so that the spool will hold a large amount djacent the supp y S9 5 is a -S p d uide of fine wire. In apparatus of this type, great 7 for Wire fYOm the pp y SDOOI 5 t0 difliculty has been experienced in controlling the t fi st e d aw ng die mounted in a die block speed of the takeup spool for the wire drawing he W e l be Withdrawn fXOm the pp apparatus so that there is the least possible tend- D00 5 by a wire drawing capstan 9, driven v y & ency for the takeup spool to apply excessive tendraw motor Suitable guide rOliBYS H being Sign t th i provided for guiding the wire 6 in its passage It is an object of the present invention to probet een the capstan 9 and the dies in the die vide an improved method of and apparatus for block obtaining a selected average tension on strands After t Wire has been passed t o the dies in strand handling machi 3c in the die block 8, wrapped a predetermined num- In accordance with one embodiment of the ber of times around the capstan 9 a d passed invention, the speed of the wire between the last Over the guide e s it iS directed from the step of the wire drawing capstan and the takeup last D o the capstan 9 to a u de r01 6! l2- spool is ccntrolled by varying the torque of the Cooperating With thfi guide roller '2' is a movable spooler motor in cycles between a relatively high guide roller [3, mounted upon a tension or upp value and a relatively low value, to maintain a Cushioning arm Which s, in turn, p ed at controlled slip on the last capstan and thereby W The arm 14, which s p r s t e uide roller maintaining the tension in the wire between the l3, is normally held in predetermined p ion capstan and takeup spool substantially constant by cooperating p in 5 and IT and carries a throughout most of the cycle of the apparatus, 40 cond guide roller Ill. The decrease in motor torque is initiated, in ac- The Wire, after being passed around One Of the eo an it t present th by by passmg idler guide rollers on the cushionin arm i4 is rtio of th resistance of h poofing t r directed to an idler roller I9, back to the other rotor circuit under control of a tension arm beroller 0h and down 150 t e d s r butor 24. The tween th capstan of the wire drawing apparatus idler roller I9 is mounted on a cushioning arm and the takeup spool, which tension arm will close 29, Similar to the arm the arm 20 being D a circuit to a slow to release or time delay relay Oiled at 2| and being held in its normal pos t n when the tension on the wire reaches a predetery coope Springs 22 and 3- With this armined point. The slow to release or time delay Iangemeht, the Cushioning arms y be moved relay, upon being energized, will cut out a portio on relatively close together, at which time there will of the resistance in the rotor circuit for a definite short period of time and since the motor normally operates on the portion of its speed torque curve where both speed and torque are descending, the by-passing of part of its resistance will reduce its be a comparatively short length of wire between the fixed idler l2 and a distributor 24, or when the tension on the Wire is released somewhat, a relatively large amount of wire may be held under a definite tension between the roller l2 and the distributor 24 due to the displacement of the cushioning arms 14 and Ill and the guide rollers carried by them away from each other. The distributor 24, which is shown diagrammatically, distributes the wire over the face of the takeup spool 25 mounted upon a shaft 25 and adapted to be driven by a spooler motor 21. The shaft 25 also has mounted on it an electromagnetic type of clutch 25, which, upon energization, will connect the shaft 15 directly to a sheave 29, thereby to connect the shaft 25 through a driving element 30 to a shaft 41, which interconnects the motor II and capstan 9, the shaft 3| being provided with a driving sheave 32. This just described magnetic clutch and driving connection serves to connect the capstan and takeup spool during the starting periods of the machine, suitable interlocks being illustrated diagrammatically at 33. These interlocks may be of the type disclosed in the co-pending application of C. O. Haase No. 292,787, filed August 31, 1939, now Patent No. 2,266,861, issued December 23, 1941, or may be of any other suitable type which will serve to positively interconnect the takeup spool and capstan during the periods of acceleration on the starting of the apparatus. Any suitable means may be utilized for controlling the apparatus during deceleration, but since it does not pertain to the present invention, it has not been shown.
After the interlock illustrated diagrammatically at 33 has controlled the starting of the apparatus and the capstan and takeup spool have reached their normal operating speeds, the electromagnetic clutch 28 will be deenergized and the motor 21, which is preferably a 3 phase induction motor, will control the speed of the takeup spool or reel 25. The motor 21 has its stator field supplied with current through the leads 34, 35 and 36 and normally has the resistances 60, ii and 42 connected in its rotor circuit through the break contacts of a relay 43, which may be of the slow to release type or may be a time relay settable to release after a predetermined interval upon being energized. In the diagram of Fig. 1, this device has been shown in the form of a slow to release relay in order to simplify the disclosure, but it will be understood that any suitable time delay relay may be substituted for the slow to release relay. The relay 43 has one side of its winding connected to ground at 44 and has the other side of its winding connected to one terminal of a highly sensitive switching device 54 comprising contacts 45 and 45. The con tact 45 is connected to the winding of the relay 43 and is positioned to be closed by an extending portion 41 of the cushioning arm 14 when the tension in the wire between the distributor 24 and guide roller 12 reaches a predetermined relatively high value. The contact 46 of switch 54 is connected to grounded battery at 48 and when the switch 54 closes, the grounded battery at 48 will be connected through the winding of the relay 43 to ground at 44 to energize the relay 43, thus by-passing part of the resistance of the rotor circuit of motor 21.
By reference to Fig. 2, it will be seen that the range of operation of motor 21, which, as pointed out hereinbefore, is a 3 phase induction motor, is in that portion of the speed torque curve where both the speed and the torque are descending. Since the load torque is also descending at this time, the by-passing of a portion of the resistance of the rotor circuit of the motor will result in a decrease in the torque output of the motor, thereby to decrease the speed of the motor, create slip and lower the tension in the wire I between the roller 12 and the takeup spool 25.
Since it is desirable to operate the apparatus with a slight slip on the last pass oi the wire drawing capstan, the control of the speed relation and consequent tension between the capstan and the takeup spool must be maintained within a relatively close range and, with the apparatus described hereinbefore, this is accomplished by by-passing a portion oi the resistance in the rotor circuit of the takeup motor for definite time intervals. After the spooling motor or takeup motor 21 and drawing motor it have been started in operation and have reached their normal operating speed, the slip on the last step of the wire drawing capstan 9 will be maintained within the desired range by by-passing a part oi the resistance of the rotor circuit of the spooler motor 21 at variable intervals under control of the switch 54, which will be actuated by the cushionlng arm 14 when the tension in the wire reaches a predetermined value. This operation is illustrated diagrammatically in Fig. 3, wherein the time cycles of the apparatus have been illustrated and designated cycles 1 to 6, inclusive. By reference to Fig. 4, it will be seen that the tension in the wire is substantially constant over a major portion of the winding operation and when the slip at the last capstan is taken up, the tension will rise rapidly to a predetermined value, effecting closure of switch 54 and introducing a definite period of deceleration of the takeup spool. In order to illustrate this portion of the operation, the curve illustrating wire speed has been exaggerated; that is, the decrease in the time during which the resistance is normal in the rotor circuit of motor 21 has been shown as decreasing quite rapidly to bring out the fact that while the time interval during which part of the resistance of the rotor circuit of the spooler motor is by-passed is constant, the time intervals during which the resistance is in the rotor circuit of the spooler motor decreases gradually as the takeup spool 25 goes from an empty to a full condition. It is believed to be apparent from the foregoing that after the apparatus has gone through its starting period of acceleration and reached its normal operating speed, the increase in tension to a predetermined point in the wire between the capstan and takeup spool will cause the closure of switch 54 and the consequent bypassing of a portion of the resistance of the rotor circuit of the spooler motor 21 and that this bypassing of resistance will be maintained for a definite set interval, depending upon the setting or time delay characteristics of the relay 43, whereupon the resistance will automatically be cut back into the rotor circuit and will remain in the rotor circuit a variable period of time until the accumulation of wire between the rollers 13, I8 and I9 is taken up by the takeup spool and the cushioning arms I4 and 20 are moved close enough together to cause the portion 41 of arm 14 to again close switch 54. In this manner, the tension in the wire between the capstan and takeup spool and the consequent degree of slip of. the wire on the last pass of the capstan will be varied within a definite predetermined range.
Although a specific embodiment of the invention has been described hereinbefore, it will be understood that modifications thereof may be made without departing from the invention, which is defined by the appended claims.
What is claimed is:
1. A method of controlling the tension of a strand in a takeup mechanism which comprises increasing the tension until it reaches a predetermined upper limit and then decreasing the tension a predetermined amount for a predetermined time, and repeating these steps to obtain a selected average tension.
2. The method of controlling the speed of a takeup spool motor relative to an associated material working apparatus which comprises applying a relatively high torque to the motor of the takeup spool tending to place the material under tension between the working apparatus and takeup spool, decreasing the resistance of the circuit of the spool motor in response to a predetermined tension in the material, and maintaining said lower resistance in the spool motor circuit for a definite length of time, thereby to alternately apply a high and low torque to the spool.
3. A method of controlling the range of tension of a strand in a takeup mechanism which comprises automatically varying the speed of the strand between fixed high and low values, initiating the low speed condition at intervals in response to a predetermined increase in tension on the strand, and maintaining said low speed condition for predetermined definite intervals.
4. A method of controlling the range of tension of a strand in a takeup mechanism which comprises automatically varying the speed of the strand between high and low values, initiating the low speed condition at intervals in response to a predetermined increase in tension on the strand, and maintaining said low speed condition for the same interval of time after each initiation thereof.
5. A method of controlling the tension or a strand between a strand working apparatus and a takeup mechanism which comprises maintaining a variable supply of strand between the working apparatus and takeup mechanism, reducing the amount of said supply to a predetermined amount, then increasing said supply at a predetermined rate for a definite time interval, and repeating these steps alternately to obtain a tension within a selected range.
6. In a strand takeup mechanism, a takeup spool, a motor for driving said spool, a tension arm movable in response to tension in the strand,
means for varying the torque of the motor, andmeans actuated by the tension arm for rendering the means for varying the torque of the motor operative for a definite fixed interval or time.
7. In a strand takeup mechanism, a takeup spool, a motor for driving the spool, means responsive each time the strand is subjected to a predetermined amount of tension for decreasing the torque output of the motor by a predetermined amount, and means for maintaining the tension responsive means effective for a predetermined interval of time each time it is rendered effective by the tension of the strand reaching said predetermined amount.
8. In a strand takeup mechanism, a takeup spool, a motor for driving the takeup spool, resiliently supported means for maintaining a loop of strand adjacent the takeup spool. means operable by said resiliently supported means upon a predetermined decrease in the size of said loop for decreasing the torque of said motor, and means associated with said last mentioned means for maintaining said last-mentioned means operative for a predetermined time interval.
9. In a strand takeup mechanism, a takeup spool, a motor for driving the takeup spool, resiliently supported means for maintaining a loop of strand adjacent the takeup spool, means actuated by the resiliently mounted means in response to a predetermined tension in the loop for reducing the torque of the motor to increase the size of said loop, and means for maintaining said last mentioned means operative for a predetermined length of time.
10. In a strand takeu'p mechanism, a takeup motor operable in the portion of its speed-torque curve where torque and speed are increasing, said motor having a rotor resistance of a definite value, a takeup spool driven by said motor, guiding means for supporting a variable supply of strand adjacent said takeup spool, means actuated by the guiding means for by-passing a portion of the resistance of the rotor circuit of the motor to decrease the torque of the motor, and means for holding the last mentioned means operative for a predetermined length of time to increase the supply of strand supported by guiding means.
11. A methodof controlling the tension of a strand in a takeup mechanism which comprises driving the takeup mechanism at a relatively high speed until the tension in the strand reaches a predetermined upper limit and then decreasing the speed of the takeup mechanism to a predetermined fixed speed for a fixed time, and repeating these steps to obtain a selected average tension in the strand.
12. In a strand takeup mechanism, a takeup spool, a motor for driving said spool, a tension arm movable in response to tension in the strand, means for varying the speed at which the motor drives said spool, and means actuated by the tension arm for rendering said last mentioned means operative for a definite interval of time each time the tension arm actuates it.
13. In a strand takeup mechanism, a takeup spool, a drive motor for drivingthe takeup spool,
, means for maintaining a loop of strand acfiacent the takeup spool, means operable by the means for maintaining a loop of strand when the size of the loop is decreased a predetermined amount for decreasing the speed of the motor, and means associated with said last-mentioned means for maintaining said last-mentioned means operative for a predetermined time interval.
14. In a strand takeup mechanism, a takeup spool, a motor for driving said takeup spool, re-
siliently supported means for maintaining a loop of strand adjacent the take-up spool, means operable by said resiliently supported means when a predetermined decrease in the size of said loop occurs for decreasing the speed of said motor, and means associated with said last-mentioned means for maintaining said last mentioned means operative for a predetermined time interval/ WOLF BERTHOLD. WILSON W. REA.
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2417780A (en) * 1944-10-28 1947-03-18 Edward G Parvin Reeling control mechanism
US2466227A (en) * 1944-11-15 1949-04-05 Borg George W Corp Coil winding machine
US2521346A (en) * 1943-10-21 1950-09-05 Bristol Aeroplane Co Ltd Ammunition feed mechanism for machine guns
US2568466A (en) * 1949-03-18 1951-09-18 Gen Electric Contacting device for moving wires
US2594427A (en) * 1947-05-22 1952-04-29 Western Electric Co Method and apparatus for uniformly tensioning an advancing strand
US2613338A (en) * 1949-05-20 1952-10-07 United Merchants & Mfg Electric motor control system
US2668019A (en) * 1949-07-07 1954-02-02 Western Electric Co Strand tension control mechanism
US2707254A (en) * 1954-05-07 1955-04-26 Cutler Hammer Inc Looping tower motor control system
US2768797A (en) * 1951-05-03 1956-10-30 John Bright & Brothers Ltd Unwinding means for threads, cords, and the like
US2773652A (en) * 1952-01-25 1956-12-11 Severini Goffredo Apparatus for the production of yarn cheeses
US2874774A (en) * 1955-08-03 1959-02-24 Ray W Scott Lacing cutter
US3233397A (en) * 1962-07-05 1966-02-08 British Insulted Callender S C Apparatus for controlling the tension in a flexible material as it is being wound onto or unwound from a drum
US3364403A (en) * 1963-11-07 1968-01-16 Jean Gusken Maschinenfabrik Ei Motor control for maintaining the tension of positively pulled warp threads in warp looms
US3476330A (en) * 1967-10-03 1969-11-04 Lear Siegler Inc Reel assembly
US3558026A (en) * 1967-09-25 1971-01-26 Rosen Karl I J Yarn feeder
US3670975A (en) * 1968-11-20 1972-06-20 Matsushita Electric Ind Co Ltd Constant tension controller device for winder
EP0275571A1 (en) * 1986-12-24 1988-07-27 N.V. Bekaert S.A. Winding apparatus for elongate elements
US8695912B2 (en) 2011-04-19 2014-04-15 Great Stuff, Inc. Reel systems and methods for monitoring and controlling linear material slack
US9067759B2 (en) 2012-04-17 2015-06-30 Great Stuff, Inc. Automatic reel devices and method of operating the same

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521346A (en) * 1943-10-21 1950-09-05 Bristol Aeroplane Co Ltd Ammunition feed mechanism for machine guns
US2417780A (en) * 1944-10-28 1947-03-18 Edward G Parvin Reeling control mechanism
US2466227A (en) * 1944-11-15 1949-04-05 Borg George W Corp Coil winding machine
US2594427A (en) * 1947-05-22 1952-04-29 Western Electric Co Method and apparatus for uniformly tensioning an advancing strand
US2568466A (en) * 1949-03-18 1951-09-18 Gen Electric Contacting device for moving wires
US2613338A (en) * 1949-05-20 1952-10-07 United Merchants & Mfg Electric motor control system
US2668019A (en) * 1949-07-07 1954-02-02 Western Electric Co Strand tension control mechanism
US2768797A (en) * 1951-05-03 1956-10-30 John Bright & Brothers Ltd Unwinding means for threads, cords, and the like
US2773652A (en) * 1952-01-25 1956-12-11 Severini Goffredo Apparatus for the production of yarn cheeses
US2707254A (en) * 1954-05-07 1955-04-26 Cutler Hammer Inc Looping tower motor control system
US2874774A (en) * 1955-08-03 1959-02-24 Ray W Scott Lacing cutter
US3233397A (en) * 1962-07-05 1966-02-08 British Insulted Callender S C Apparatus for controlling the tension in a flexible material as it is being wound onto or unwound from a drum
US3364403A (en) * 1963-11-07 1968-01-16 Jean Gusken Maschinenfabrik Ei Motor control for maintaining the tension of positively pulled warp threads in warp looms
US3558026A (en) * 1967-09-25 1971-01-26 Rosen Karl I J Yarn feeder
US3476330A (en) * 1967-10-03 1969-11-04 Lear Siegler Inc Reel assembly
US3670975A (en) * 1968-11-20 1972-06-20 Matsushita Electric Ind Co Ltd Constant tension controller device for winder
EP0275571A1 (en) * 1986-12-24 1988-07-27 N.V. Bekaert S.A. Winding apparatus for elongate elements
US8695912B2 (en) 2011-04-19 2014-04-15 Great Stuff, Inc. Reel systems and methods for monitoring and controlling linear material slack
US8746605B2 (en) 2011-04-19 2014-06-10 Great Stuff, Inc. Systems and methods for spooling and unspooling linear material
US9663322B2 (en) 2011-04-19 2017-05-30 Great Stuff, Inc. Systems and methods for spooling and unspooling linear material
US10556772B2 (en) 2011-04-19 2020-02-11 Great Stuff, Inc. Systems and methods for spooling and unspooling linear material
US11697570B2 (en) 2011-04-19 2023-07-11 Great Stuff, Inc. Systems and methods for spooling and unspooling linear material
US9067759B2 (en) 2012-04-17 2015-06-30 Great Stuff, Inc. Automatic reel devices and method of operating the same
US9771239B2 (en) 2012-07-20 2017-09-26 Great Stuff, Inc. Automatic reel devices and method of operating the same
US10370218B2 (en) 2012-07-20 2019-08-06 Great Stuff, Inc. Reel with manually actuated retraction system

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