US3124843A - Control means for textile machines - Google Patents

Description

March 17, 1964 Q 5, ADAMS ETAL 3,124,843

CONTROL MEANS FOR TEXTILE MACHINES Filed Oct. 25, 1961 3 Sheets-Sheet l INVENTORS CECIL $.ADAMS. WALTER A.DEAN & y zoas: w. MARTIN ATTORNEY March 17, 1964 c. s. ADAMS ETAL 3,124,843

CONTROL MEANS FOR TEXTILE MACHINES Filed Oct. 25, 1961 3 Sheets-Sheet 2 INVENTORS Cecn. s. ADAMS, WALTER A.DEAN 4; BY GEDRGE W. MARTlN ATTORNEY March 17, 1964 c. s. ADAMS ETAL 3,124,843

CONTROL MEANS FOR TEXTILE MACHINES Filed Oct. 25, 1961 5 Sheets-Sheet 3 LIMIT $W)TCH INVENTORS CECIL s. ADAMS. ELECTROYNIC WALTER A. DEAN E 77 -A 5 B ezoasa w. MART\N C I3 9. 10. 2 B ATTORNEY United States Patent CUNTROL MEANS FOR TEXTILE MAQHINES Cecil S. Adams, Saluda Lake, Greenville, Walter A. Dean,

Greenviiie, and George W. Martin, Ware Shoals, S.C.,

assignors to Adams, Inc., Greeuville, 5.52., a corporation of South Carolina Filed Oct. 25, 1961, Ser. No. 147,582 6 Claims. (Cl. 19.25)

This invention relates to control means for textile machines having motor driving means, a supply of moving strands being fed from a creel over a lifting roll to a drafting system, and moving strands being fed from the drafting system to packaging means.

The invention is particularly adapted for use with roving frames and the like. The invention contemplates the use of strand actuated detecting means sensing the absence or excessive slackness of the strands. Certain of such detecting means are illustrated as being of the type shown in United States Patent No. 2,754,653, issued to Simpson J. Adams on July 17, 1956. Suitable means for deactivating the circuit of the detecting means just prior to periods of reversal of the traversing carriage, thus incurring that the textile machine is not carried by momentum or inertia to an undesired stopping point illustrated in United States Patent No. 2,658,326, issued to Simpson J. Adams on November 10, 1953.

Stop motion control means of various types are presently in use on roving frames and the like, but few relate to detecting means for sliver run-out, and those who do have not proved effective. No effective control means have been provided to signal sliver run-out and roving faults separately.

Accordingly, it is an important object of this invention to provide an effective means of preventing sliver run-out on roving frames.

Another important object of this invention is to provide control means for roving frames and the like indicating which side of the drafting system broken or slack ends occur.

Another object of the invention is the provision of a novel control means for stopping a roving frame and the like promptly upon the occurrence of faulty sliver on the creel side of the drafting system.

Another object of the invention is the provision of improved detecting means for actuating means stopping a roving frame responsive to faulty sliver which will not damage the sliver during normal operation.

Still another object of the invention is the provision of effective control means stopping a roving frame responsive to the action of broken sliver upon detecting means which do not contact the sliver during normal operation.

Another important object is to provide means indicating to operators of roving frames and the like whether faulty conditions occur in the sliver or in the roving and to stop the frame responsive to either condition without contacting the sliver during normal operation.

The construction designed to carry out the invention will be hereinafter described, together with other features thereof.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invention is shown and wherein:

FIGURE 1 is a transverse sectional elevation illustrating a roving frame equipped with control means constructed in accordance with the present invention,

FIGURE 2 is a perspective view looking toward the rear of the drafting system further illustrating control means constructed in accordance with the present invention,

FIGURE 3 is a plan view, with parts removed, illustrating a switch for use with the control means of the present invention,

FIGURE 4 is a transverse sectional elevation illustrating a modified form of the invention,

FIGURE 5 is a perspective view illustrating the modified form of the invention shown in FIGURE 4,

FIGURE 6 is a perspective view looking toward the rear of the drafting system illustrating another modified form of the invention,

FIGURE 7 is a perspective view looking toward the rear of the drafting system illustrating another modified form of the invention,

FIGURE 8 is a perspective view looking toward the rear of the drafting system illustrating still another modified form of the invention,

FIGURE 9 is a schematic circuit diagram illustrating the various electrical connections and components used in a preferred embodiment of the present invention, and

FIGURE 10 is a modified circuit diagram illustrating the various electrical connections and components used in another preferred embodiment of the present invention.

A roving frame is illustrated (FIGURE 1) as having a frame 143 including a roll beam 11 with front and rear vertical flanges 11a and 11b. A roll stand 12 is mounted upon the breast beam 11. The roll stand 12 carries the drafting system which includes a number of drafting rolls 13 for attenuating the sliver and the like fed thereto. In operation, sliver S is fed from the sliver cans 14, over the lifting roll 15 and into the trumpet 16, from whence it is fed into the drafting system between the rolls 13. The strand, in the form of roving R, coming from drafting rolls is wound by flyers 17 upon bobbins 18 to form roving packages 19. It is preferable that a stop motion A of the type illustrated in United States Patent No. 2,754,653 be mounted upon the roll beam front flange Ila.

FIGURES 1, 2 and 3 illustrate an embodiment of the invention in which the sensing means B includes a drop wire 20 having a pivoted support 21 at its lower end. The drop Wire 29 is normally slightly inclined from the vertical and rests against the sliver S adjacent its upper end. The pivoted support is in the form of a shaft journaled in a substantially closed casing 22 having a cover 22a and a back 22b. The drop wire 20 may be thus biased to fall in a given direction upon the occurrence of a faulty sliver but the pressure normally exerted upon the sliver is insufficient to damage same.

The shaft 21 carries a movable contact 23 which has electrical contact through a strip 24 with a conductor in the form of a bus bar 25. The strip 24 has a projection 24a extending through the back 2211 to contact the bus bar 25 and one end of the shaft 21 is journaled in that portion of the strip within the casing. A fixed contact 26 is provided Within the casing in the form of a plate which has connection by a projection 26a extending through the casing to have contact with a bus bar 27. The shaft 21 has a recess 21a intermediate its ends to avoid contact with the fixed contact 26 during normal operation. The bus bars are preferably mounted upon an insulating strip 28 by screws 29 which also position the cover 22a upon the back 221). The shaft 21 projects outwardly of the casing 22 and the drop wire 20 is fixed therein as by a set screw 20a. The insulating strip 28 is fixed upon the rear of the roll stand 12 upon a vertical portion 12a thereof as by screws 2801.

Upon the occurrence of a sliver run-out and the like, the drop wire 20 tilts over to the side to which it is biased to close the contacts 23 and 26 to close the circuit between the bus bars 25 and 27. Such closing of the circuit stops the roving frame motor and signals the cause of the stoppage as will be explained in detail below.

FIGURES 4 and 5 illustrate a modified form of the invention in which like parts are referred to by like reference characters with a prime notation added. The sensing means B include a horizontal bar 30 which extends beneath several sliver strands S. The bar 30 is suspended at each end from a drop wire 31 carried upon a pivoted shaft 21'. The shaft 21' is also journaled within a housing 22' provided with suitable switch contacts for closing the circuit between conductors 25 and 27.

A switch casing 22' is mounted upon standards 32 carried upon brackets 33 suitably secured as by bolts 34 to each vertical standard 1211' of the roll stands 12'. Each bar 30 has outwardly projecting ends 30a positioning the bar 30 within loops 31a in the depending end of each drop wire 31. The conductors 25' and 27 are carried in tubular supports 33 bridging the standards 32 above the switch casings 22'.

Thus a broken sliver 5 would move one of the drop wires 31 to dotted line position (FIGURE 4) and close movable contact 23 and fixed contact 26 within one of the switch casings 22'. Since the bar 30 is loosely mounted, only one of the switches need operate to complete a circuit to ground. Thus the signal is given by a detector which normally has no contact with the sliver thus avoiding damage to the sliver.

FIGURE 6 illustrates another modified form of the invention in which like parts are referred to by like reference characters with an additional prime notation added. The sensing means B" includes an elongated bar 35, extending across several sliver strands S", having upwardly extending arms 35a and 35b adjacent respective ends thereof. The arms 35a and 35b, serving as movable contacts 23", have pivoted mountings 36 carried upon fixed shafts 37. The shafts 37 are carried upon standards 32' near the center of gravity of the bar 35 and arms 35a and 35b so that a falling end of sliver will cause the arms to pivot to dotted line position to contact a fixed contact 26" in the form of a bar 38 carried upon the upper portion of the standards 32' on brackets 39 to complete momentarily a circuit to ground.

FIGURE 7 illustrates another modified form of the invention in which like parts are referred to by like reference characters with an additional prime notation added. The sensing means B includes an elongated bar 40 extending across several sliver strands S. The bar 40 has downwardly projecting arms 40a and 40b. The arms 40a and 40b, serving as movable contacts 23", have pivoted mountings 41 carried upon fixed shafts 42. The shafts 42 are carried upon standards 32" near the center of gravity of the bar 40 and arms 40a and 40b so that a falling sliver will cause the arms to pivot to dotted line position to contact a bar 43, serving as a fixed contact 26, carried upon the lower portion of the standards 32" on brackets 44.

FIGURE 8 illustrates still another modified form of the invention and like parts are indicated by like reference characters with an additional prime notation added. The sensing means B"" includes an elongated bar 45 suspended at each end from a flexible electrical conductor such as chains 46. The chains 46, serving as movable contacts 23"", are carried by the upper portions of the standards 32" as at 47. Fixed electrical contacts 26"" in the form of bars 48 are carried by the standards 32" so as to be contacted by the chains 46 when the bar is moved to dotted line position due to a falling end of sliver.

It is apparent that the various illustrations, in which the sensing means is mounted between the lifting roll and the strand processing system includes a bar, contemplate that the strands passing thereover supply a plurality of strand deliveries, although the sensing means which includes means suspending the bar for free independent movement at each end is useful in any textile machine having a plurality of supply strands passing over a lifting roll to a strand processing system.

Various electrical connections for operating the sliver run-out detector are illustrated in the circuit diagram of FIGURE 9. When the movable contact 23 of the detecting device B makes a temporary ground, the coil 50 is connected across ground and the high potential side 51 of the transformer, the primary 52 of the transformer being connected to L1 and L2 of a three phase power supply. When the coil 50 is thus energized, the core thereof operates to open the normally closed contacts 53 and to close the normally open contacts 54 and 55. The contacts 53 thus open the L1 side of the circuit to the coil 56 thus de-energizing the motor causing the stoppage of same. The contacts 54 place the coil 50 across ground and thus serve to lock the coil 50 until the circuit is reset as will be described below. The contacts 55 complete the signal light circuit to ground thus energizing the light to signal a sliver runout.

When the coil 56 is energized, the contacts 57, 58, 59 and 60 are closed thereby. It will be noted that contacts 57, 58 and 59 provide the motor with a three phase power supply. When the start button 61 is pressed into engagement with the contacts 62, the coil 56 is placed across L1 and L2 thus energizing the coil closing the contacts 57, 58 and 59. The contact 60 locks the coil across L1 and L2 thus maintaining the contacts 57, 58 and 59 closed so as to energize the motor.

When the faulty end of sliver has been pieced up, the stop button 63 is pushed to disengage the contacts 64 thus temporarily breaking the L1 connection to the primary 52 of the transformer. This results in the closing of the contacts 53 and the opening of contacts 54 and 55, deenergizing the signal light. The circuit to the motor is then closed by pressing the start button 61. It should be noted that when the coil 50 is energized power is still being supplied across the stop button 63 to the L1 side of the primary 52 of the transformer.

FIGURE 10 illustrates a circuit for stopping the roving frame motor responsive to a faulty roving signalled by the detector A, or a sliver run-out signalled by the detector B. When the coil 65 is energized, the contacts 66, 67, 68 and 69 are closed. The motor is energized through contacts 66, 67 and 68. The contacts 69 lock the coil 65 across L1 and L2. The L1 side of the transformer primary 70 and the L1 side of the coil 71 is placed across the stop contacts 72. The coil 71 acts as a timing relay which, when energized holds the contact 74 away from contact 75 for a short predetermined time each time the motor is started. Thus detectors A and B cannot operate until the roving frame has run a predetermined few seconds thus allowing normal tension to be placed upon the strands avoiding a false signal.

When the contacts 76 and 77 of the detector A close to make a temporary ground to the coil 78, the contacts 79, and 81 are actuated. The contacts 79 open L1 to the coil 65 which stops the motor. Contacts 80 close ground to the coil 78 so as to lock it. The contacts 81 close ground to the signal light. The steady burning of the signal light indicates that the signal was initiated by the detector A and hence the presence of a faulty roving. It will be noted that electronic relays may be employed with the detector A and B operating at low energy so that the contact made by A and B may be across high resistances such as may be occasioned by lint accumulations.

To release the coil 78 preparatory to restarting the machine the stop button 82 is pushed. This temporarily breaks the L1 side of primary 70 of the transformer and the L1 side of relay coil 71.

When the contacts 23 and 26 close a temporary ground to the coil 83 is made placing the coil 83 across the high potential side 73 of the transformer through the limit switch. The limit switch may be of the type illustrated in United States Patent No. 2,658,326 and is open during periods of reversal of the traversing carriage (not shown) of the roving frame to prevent de-energization of the motor during such periods of reversal. This operates the contacts 84, 85 and 86. Contact 84 opens the L1 side of coil 65 stopping the motor. The contact 85 closes ground to the coil 83 locking it. Contact 86 closes ground to the light through flasher 87 so as to give a flashing signal. A start button 88 is also provided to close the contacts 89 for energizing the coil 65 to reestablish the contacts to the motor after pressing the stop button 82 to reset the circuit.

While a preferred embodiment of the invention has been described using specific terms, such description is for illustrative purposes only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the following claims.

What is claimed is:

1. A control system for a textile machine having motor driving means, a supply of moving strands for a plurality of deliveries being fed from a supply over a lifting roll to a drafting system, said strands being fed from the drafting system to packaging means including; first sensing means detecting faulty strands being fed from the drafting system; second sensing means moved by a faulty strand being fed to the drafting system detecting such faulty strands; said second sensing means including; a bar disposed beneath a plurality of such strands resulting in a plurality of deliveries; switch means carried adjacent said bar; said bar being so mounted that its movement responsive to a strand falling thereon results in actuation of the switch means; electrically operated means actuated by the first and second sensing means stopping said motor driving means responsive to faulty strands being fed from the drafting system and to the drafting system respectively; and electrically operated signalling means actuated by the first and second sensing means distinguishing between stoppage caused by faulty strands being fed from the drafting system and to the drafting system; whereby strand run out is avoided and the machine stopped promptly upon the occurrence of a faulty strand whether on the supply side or the delivery side of the drafting system.

2. A control system for textile machines having motor driving means, and a supply of moving strands being fed from a supply over a lifting roll to a drafting system including; a movable bar beneath the supply of moving strands closely adjacent thereto between the lifting roll and the drafting system; said bar extending beneath a plurality of strands; means suspending the bar for free independent movement at each end thereof; switch means actuated by movement of the bar responsive to broken and excessively slack supply strands falling thereon, and electrically operated means actuated by said switch means stopping said motor upon such occurrence of broken and excessively slack supply strands.

3. The structure set forth in claim 2, in which the movable bar is freely supported adjacent each end for independent movement by depending drop wires; and a movable switch contact carrying at least one of said drop wires.

4. The structure set forth in claim 2, in which the movable bar is supported adjacent each end by a chain.

5. A control system for textile machines having motor driving means, and a supply of moving strands being fed from a supply over a lifting roll and the like to a strand processing system including; a movable bar beneath the supply of moving strands closely adjacent thereto between the lifting roll and the strand processing system; said bar extending beneath a plurality of strands; flexible means suspending the bar for free independent movement at each end thereof; switch means actuated by movement of the bar responsive to broken and excessively slack supply strands falling thereon, and electrically operated means actuated by said switch means stopping said motor upon such occurrence of broken and excessively slack supply strands.

6. A control system for a textile machine having motor driving means, a supply of moving strands being fed from a supply over a lifting roll to a drafting system, said strands being fed from the drafting system to packaging means including; first sensing means detecting faulty strands being fed from the drafting system; second sensing means moved by a faulty strand being fed to the drafting system detecting such faulty strands; said second sensing means including; a bar disposed beneath a plurality of such strands closely adjacent thereto between the lifting roll and the drafting system; switch means carried adjacent said bar; means suspending the bar for free independent movement at each end thereof responsive to a strand falling thereon resulting in actuation of the switch means; electrically operated means actuated by the first and second sensing means stopping said motor driving means responsive to faulty strands being fed from the drafting system and to the drafting system respectively; and electrically operated signalling means actuated by the first and second sensing means distinguishing between stoppage caused by faulty strands being fed from the. drafting system and to the drafting system; whereby strand run-out is avoided and the machine stopped promptly upon the occurrence of a faulty strand whether on the supply side or the delivery side of the drafting system.

References Cited in the file of this patent UNITED STATES PATENTS 2,007,643 Exley July 9, 1935 2,236,486 Boyd Mar. 25, 1941 2,636,223 De Santis et a1 Apr. 28, 1953 2,662,251 Scott Dec. 15, 1953 2,704,430 Harris Mar. 22, 1955 3,010,273 Bailey Nov. 28, 1961 FOREIGN PATENTS 327,850 Great Britain Apr. 17, 1930 790,849 Great Britain Feb. 19, 1958

Claims (1)

1. A CONTROL SYSTEM FOR A TEXTILE MACHINE HAVING MOTOR DRIVING MEANS, A SUPPLY OF MOVING STRANDS FOR A PLURALITY OF DELIVERIES BEING FED FROM A SUPPLY OVER A LIFTING ROLL TO A DRAFTING SYSTEM, SAID STRANDS BEING FED FROM THE DRAFTING SYSTEM TO PACKAGING MEANS INCLUDING; FIRST SENSING MEANS DETECTING FAULTY STRANDS BEING FED FROM THE DRAFTING SYSTEM; SECOND SENSING MEANS MOVED BY A FAULTY STRAND BEING FED TO THE DRAFTING SYSTEM DETECTING SUCH FAULTY STRANDS; SAID SECOND SENSING MEANS INCLUDING; A BAR DISPOSED BENEATH A PLURALITY OF SUCH STRANDS RESULTING IN A PLURALITY OF DELIVERIES; SWITCH MEANS CARRIED ADJACENT SAID BAR; SAID BAR BEING SO MOUNTED THAT ITS MOVEMENT RESPONSIVE TO A STRAND FALLING THEREON RESULTS IN ACTUATION OF THE SWITCH MEANS; ELECTRICALLY OPERATED MEANS ACTUATED BY THE FIRST AND SECOND SENSING MEANS STOPPING SAID MOTOR

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