Патент USA US2409962код для вставки
~ ‘ ' Oct- 22, 1946. DE HART G. scRANToM _ 2,409,961 FAULT. DETECTOR AVND AUTOMATIC STOP DEVICE FOR TEXTILE MACHINES Filed Aug. 26, 1944 3 Sheets-Sheet '1 if ' INVENTOR. Oct. 22, 1946.‘ DE HART s. scRAN'roM I , 2,409,961 FAULT DETECTOR AND AUTOMATIC S-TOP DEVICE FOR TEXTILE MACHINES Filed Aug. 26, 1944' ,, ' I ~ _ s Slieets-She'et 2 3AM‘ 0 Oct. 22, 1946; " DE HART G. SCRANTOM ' 7 2,409,961 FAULT DETECTOR AND AUTOMATIC STOP DEVICE FOR TEXTILE MACHINES Filed Aug. 25, 1944 V 7” o * 17g” u 3 Sheets-Sheet ‘3 giFy/A 62/ V , M. ; z"a \ T47 ' J” ' (a f/"i \ INVENTOR. j. G'- Scram‘am ?TT ORNEY' Patented Oct. 22, 1946 2,409,961 ' UNITED STATES PATENT OFFICE 2,409,961 FAULT DETECTOR AND AUTOMATIC STOP DEVICE FOR TEXTILE MACHINES De Hart G. Scrantom, Maplewood, N. J ., assignor to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application August 26, 1944, Serial No. 551,336 11 Claims. (Cl. 66—166) 2 1 of the knitting mechanism showing the produc This invention relates to an automatic fault detector for knitting, braiding, weaving, strand tion of a rough knitted fabric over a conductor . ing, twisting and like machines and more par and the position of the control arm of the stop ticularly to an electrically controlled stopping de device; vice for a textile machine wherein a knitted ma terial is produced or a knitted covering is applied Fig. 8 is an enlarged cross-sectional view of an insulated conductor covered with a rough knitted over a core such as an electric conductor. fabric; Some of the limiting factors in operating knit ting machines are the breaking of threads and the dropping of stitches in the knitting opera 1011. Fig. 9 is a front elevational View of a modi?ed stop device wherein the birfurcated control arm 10 may be moved into and out of operative position; Fig. 10 is an end view of the modi?ed stop de An object of the present invention is to provide a small compact device for promptly'stopping a textile machine upon the occurrence of undesir able conditions or faults, such as the breaking of a. yarn or thread, the breaking of the needle and/ or the dropping of a stitch. Another object of the invention is the provision of an electrical stop device which may be applied readily to machines already in use without ma— 20 terial changes in the construction thereof. vice shown in Fig. 9, and V a Fig. 11 is a schematic circuit diagram disclosing one adaptation of the electrical stop device of this invention. , Referring now to the drawings, the reference numeral It designates a frame of a knitting ma chine on which is mounted a motor l I. This mo tor drives a pulley l2 and a belt l3, which in turn drives suitable gearing l4 enclosed in a gear box IE secured to the frame In of the machine by tension in the textile strands caused by the break bolts I6. The gearing l4 rotates a hollow tubular shaft ll (Fig. 2) through which a core or electri cal conductor 20 passes to or. from a knitting mechanism 2|.‘ The knitting mechanism to which this inven tion is applied is disclosed more in detai1 in B. W. Lerch et al., Patent 2,236,183, and S. E. Brill hart Patent 2,239,378, and only so much of this ing of a strand or the occurrence of a dropped mechanism is disclosed and described hereinafter In accordance with one embodiment of the in~ vention, an automatic stop device is applied to a knitting machine so that a control arm of the de vice is moved by the knitted material or by a con ductor or core being covered with the knitted ma terial when the material is moved transversely to its direction of travel because of an unbalanced stitch during the knitting process. vOther objects and advantages of the present in vention will be apparent from the following de— tailed description taken in connection with the as is necessary for a'full understanding of the present invention. . ’ ‘ Rotatable with the tubular shaft ll. of the knit ting mechanism, is a jack cylinder 25 which is also driven by the gearing l4. Needle jacks 26 are re Fig. 1 is a fragmentary front elevational view of a conventional type knitting machine disclos ing the electrical stop device of this invention ap butts 28 which engage wobbler cams'29 operated by driven shaft IT as shown in Fig. 2. The up drawings wherein: plied thereto; Fig. 2 is an enlarged part-sectional View of the needle operating mechanism for applying a ciprocated in the jack cylinder through their per end of the knitting head is provided with a needle guide cylinder 39 in which a plurality of knitting needles 3| are reciprocated. by bifurcated knitted covering over an electrical conductor and ends 32 of the needle jacks 2'6 engaging projec-V the application of the automatic stop device tions 33 on the knitting needles. thereto; Fig. 3 is an enlarged fragmentary vertical sec tional view showing a modi?ed bifurcated control arm of the electrical stop device in operative po sition with the conductor being covered with a The strands, threads ‘ knitting operation are of stationary cops 36 swingably mounted on . or yarn 35 (Fig. l) for th supplied from a plurality supported on a stand 31 the frame ll] of the knit ting machine. The strands of yarn or threads 35 are fed from Fig. 4 is a sectional View taken on line 4-4 of 50 the cops 36 through guides 38 and 39 to a yarn knitted fabric; guide spider 40 positioned immediately above and Fig. 3; Fig. 5 is a fragmentary vertical sectional view of the knitting mechanism disclosing the produc tion of a smooth knitted fabric over a conductor and the position of the control arm of the stop device; . concentric with the knitting needles 3|. The guide spider 46 is adjustably mounted on an up right 4! which is secured to the upper surface of the gear boX l5. Thisspider carries a plurality of yarn guides d5 which are concentrically ar Fig. 6 is an enlarged cross-sectional view of an insulated conductor covered. with a smooth ranged and equally spaced around a cylindrical knitted fabric; vertical direction within'a central opening in the The conductor 20 passes, up tube or web holder 45 adjustably mounted in‘ a . ‘Fig. 7 is a fragmentary vertical sectional view 60 spider 49 (Fig. 2). 2,409,961 3 4 or down through this cylindrical tube 46 and a knitted tubular covering of yarn is applied over the conductor by the knitting needles. contacts 51, 60 or El, 6!. The closure of either of these' contacts by the control arm'establishes a shunt from ground through either contact at or 6! through conductor 62 to grounded battery 63 to thus shunt out or by pass the solenoid 61 thereby tie-energizing it. The coil spring 19 then Thus the strands of yarn are led to the needles from equally spaced points about a circle in a symmetrical pattern to converge into a knitted covering or web around the conductor and the conductor will under normal conditions invari moves the armature 65 to open position to dis connect the motor from the source of power 58 ably travel in a central position relative to the to stop the machine. The shunting of solenoid knitting mechanism because of approximately 10 67 de-energizes it and spring 85 then moves equal tension of the strands of yarn on all sides switch 64 to open position to prevent restarting thereof. However, in the event a strand of yarn of the machine until the defect is corrected and breaks or a drop ‘stitch occurs due to a broken switch 64 is again manually closed. needle or other cause to disturb the symmetrical From the foregoing it will be evident that the pattern, the tension or pull on the knitted ma 15 textile machine will be automatically controlled terial and‘ on the conductor from the various and stopped when any defect occurs in the knit sides will be unequal thereby causing the knit ted fabric to cause it to move out of its normal ted‘ material and the conductor to oscillate or line of travel or to cause the core being covered shimmy out of its normal central position of to ?uctuate out of its normal line of travel. travel. If the material is knitted without acore 20 The knitting machine disclosed in Fig; i. of then the knitted material alone will oscillate as the drawings is designed to produce a smooth cov above described on the occurrence of a‘ defect ering as shown in Fig. 6 with knots l2 on the in therein. side or to produce a rough covering as. shown in This oscillating movement of the knitted ma Fig. '2 with the knitted knots ‘E2 on the outside. terial and the conductor on the occurrence of a 25 In the production of the smooth covering the fault provides the operating basis'of the pres conductor or core 2i] enters the top of the knit ent invention for automatically and promptly ar ting mechanism and travels downward‘ as indi resting the movement of a knitting or similar ma cated by the arrows in Figs. 5 and 3. chine. a smooth covering, the cylindrical tube Or web ' In knitting In accordance with one embodiment of the 30 holder 66 is moved upwardly from the position invention, a hooked control arm All (Figs. 2, 5 shown in Figs. 2 and 7 to that shown in Fig. 5 and 7) or a bifurcated control arm t8 (Figs. 3 and 4) is positioned to contact the knitted ma terial or the conductor 25 When in its normal central position relative to the knitting needles arranged in a circle. This control arm 41, or 48 is slidably mounted in a support 5!} which is se cured by a bolt and nut to the spider it as shown in Fig.2. The straight end of the control arm 47 or 48 is provided with an insulator member 56 which engages a vertical leaf spring contact 57 suitably secured to the support 59' and in sulated» therefrom. Mounted in two upturned lugs 58—59 of the support 5%! are two threaded contacts Ei0—6l spaced on each side of the con tact 51.. The threaded contacts SKI-61 can be individually adjusted relative to the common contact 51 to give any desired degree of sensi so that the control arm 4? or 48 of the stop de» vice is positioned below the web holder 46. In knitting a rough covering, the conductor or core 20 enters the bottom of the knitting mech anism and travels upwardly as indicated by‘the arrow in Fig. 7. This knitting operation requires that the web holder 45 be positioned closer to the knitting needles 3| as shown in Fig. 7 and that the control arm Ill or 48' be positioned Within a cut out in the web holder 45 as shown in Figs. 2 and 7. A modi?ed structure for moving the control’ arm of the stop device into and out of engagement with the conductor or core 213 is disclosed in Figs. 9 and 10. In this modi?cation the support 51] of the stop device is provided with a movable lever ‘is which is pivoted at M on the support. -The tivity. . lever 13 has mounted on it a leaf. spring contact ,As shown in the controlcircuit diagram of Fig. 75 which is similar to and performs the same 11 the adjustable contacts 6t—6l are connected 50 function as the leaf spring contact El shown in to ground and the contact 5?‘ is connected Figs. 2 and 11. Contact 15 is bifurcated at its through a conductor 62 to grounded battery 63. lower end to form forks ‘l6 (Fig. ,10) which are Themotor H of the knitting machine is ordi positioned in a slot in the insulator member 56 narily controlled by a hand switch t4 (Figs. 1 secured to the right hand end (Fig. 9) of a con 55 and 11) which, when closed against the pull. of trol arm Tl. Control arm 'l'l performs the same a ‘spring 55, completes a circuit from ground function and is somewhat similar to controlarrn through a conductor 66, a solenoid Bl, a conduc '38 in that it has a modi?ed forked endl8 and is tor 68 to grounded battery 63 to energize sole slidably mounted in an upturned lug 19 of the sup noid B1. The energization of solenoid 6i pulls port 55. Also mounted on and carried by the piv up an armature 69 against the tension of a spring 60 oted lever ‘F3 are the two adjustable contacts 6El 10 to close a circuit through the motor I i from 6| (Figs. 9 and 11) which are mounted in lugs 39 a source of power ‘H to eifect operation of the integral with the lever. 7 knitting machine. Hand switch ?ll is also an armature of solenoid 6'5 and hence upon ener gization of the solenoid the switch armature Ed is held in circuit closing position against the pull of spring 65 tonprovide a locking circuit for the solenoid. When a strand ‘s5 breaks or a stitch is dropped by a broken needle or by an other cause, the conductor or core 25 being covered with a knit» ted textile is thrown from a balanced central po sition of travel into an oscillatory movement. The oscillating core 25 and/or the knitted‘teX tile moves control arm 47 or 48 to close either When the lever 13 is manually moved counter clockwise to the position indicated in dotted out~ line in'Fig. 9 the leaf spring contact '55 mounted thereon is also moved and through its forks 15 move the insulator 56 and control arm ii‘ to the right as indicated in dotted outline. This move ment of the control arm moves its forked end 13 out of engagement with the‘conductor 20 so as to ' expedite the making of repairs when a defect oc ours in the knitting operation. 7 The'lever 13 is held in its dotted'line position of Fig. 9 by a tensioned coil springtZ; one~end 75 of which is secured to a portion 83 of the support 2,409,961 5 6 7. In a machine of the types indicated, means 5t and the other end of which is secured to an up for combining a plurality of strands to form a turned lug 84 on the lever 13. Since the lower end covering over a traveling core which moves out of the spring 32 is thus moved about pivot “is to of its normal path of travel when a defect oc shorten the distance between 83 and 8d the spring curs in the covering, and machine stopping becomes shorter and holds the lever 13 in the means operated by the core when a defect occurs > indicated dotted line position. Likewise, when in the covering including a control arm for en lever 13 is manually moved to its operative or full gaging the core, and means for moving the con line position of Fig. 9 to bring the forked end 18 trol arm out of engagement with the core. of the control lever ‘i’! into engagement with the 8. In a machine of the types indicated, a motor, conductor 28, the spring 82 is again shortened to 10 means operated by the motor for combining hold lever l3 in that position. strands to form a moving tubular fabric which When support 50 with its modi?ed structure oscillates out of its normal path of travel when a (Figs. 9 and 10) mounted thereon is secured to the defect occurs in the fabric, a control member in knitting machine in the position shown for the support 553 in Fig. 2, the control arm Ti will like 15 contact with the traveling fabric, a control cir cuit for the motor which is operated. by the con wise operate the circuit shown in Fig. 11 to stop the machine when a defect occurs as has been de trol member when a defect occurs in the fabric to oscillate the member to disconnect the motor scribed. and stop the machine, and means for moving the t is to be understood that the nature of the em bodiment of the invention herein disclosed is 20 control member out of contact with the traveling fabric. merely illustrative and that the invention can be applied to braiding, knitting, weaving, stranding, 9. In a machine of the types indicated, means for combining strands to form a covering over a twisting and like machines and that changes and core normally traveling without oscillating but 'modi?cations may be made without departing from the spirit and the scope of the invention. 25 which oscillates when a defect ‘occurs in the cov ering, an electric motor for driving the strand What is claimed is: 1. In a machine of the types indicated, means combining means, an arcuate feeler, means for for combining a plurality of strands to form a cov urging the arcuate feeler into contact with the ering over a traveling core which moves out of its traveling core, a switch in circuit with the elec normal path of travel when a defect occurs in the 30 tric motor for stopping the motor, and means covering, and machine stopping means operated operable by the arcuate feeler when the traveling by the core when a defect occurs in the covering. core oscillates for actuating the switch to stop 2. In a machine of the types indicated, means the electric motor. for applying a textile covering over a traveling 10. In a machine of the types indicated, means core which moves laterally when a defect occurs in 35 for continuously combining strands into a cover the covering, control means in contact with the ing over a core normally traveling without oscil traveling core and movable therewith in a lateral lating but which oscillates when a defect occurs direction when a defect occurs in the covering, in the covering, means for driving the strand and stopping means for the machine controlled by combining means, a relay for stopping the driv the said control means. 40 ing means when actuated, a pair of contacts in circuit with the relay and connected in parallel 3. In a machine of the types indicated, means for combining strands to form a covering over a with each other, said contacts being spaced a traveling core which oscillates out of its normal predetermined distance apart, a contactor in cir line of travel when a defect occurs in the covering, cuit with the relay for actuating it when in en and means for stopping the machine including a 45 gagement with one of the contacts, and means control arm operated by the core when a defect including a ‘feeler for engaging the covering for holding the contactor out of engagement with occurs in the covering. 4. A stop device for machines for applying a the contacts when the core does not oscillate and. covering of strands over a traveling core which for moving the contactor into engagement with automatically varies its movement when a defect 50 one of the contacts when the core oscillates. occurs in the covering, comprising an arm posi 11. In a machine of the types indicated, tioned near the traveling core and adapted to be means for continuously combining a plurality of actuated by the core when a defect occurs in its strands into a covering over a core being ad covering, and electric contacting means operated by the actuated arm to stop the machine. 5. Electrically operated stop devices for machines of the types indicated for applying a vanced through the strand-combining means normally without being oscillated but which is means operated by the motor for combining feeler for holding the contactor out of engage strands to form a moving tubular fabric which oscillates out of its normal path of travel when a ment with both the contacts when the core is not oscillated, and means controlled by the feeler for moving the contactor into engagement with one of the contacts when the core is oscillated. whereby the electric motor is deenergized. oscillated when a defect occurs in the covering, an electric motor for driving the strand-com textile covering to a traveling core which oscil bining means, an electrical circuit for controlling lates when a defect occurs in the textile covering, the motor and including a pair of contacts spaced comprising normally open contacts, means con a predetermined distance apart and connected in 60 trolled by, the oscillation of the core to close the parallel and a contactor positioned between the contacts, and means controlled by the closure of contacts, said motor controlling circuit serving to the contacts to stop the machine. deenergize the motor when the contactor en 6. In a machine of the types indicated, a motor, , gages one of the contacts, a slidably mounted defect occurs in the fabric, a control arm in con tact with the traveling fabric, and a control cir cuit for the motor which is operated by the con trol arm when a defect occurs in the fabric to oscillate the arm to disconnect the motor and stop the machine. DE HART G. SCRANTOM.