US1561977A - Magnetic stop for spinning machines - Google Patents

Description

Nov. 17, 1 925.

1,561,977 FIDLER EF AL MAGNETIC STOP FOR SPINNING HACHINES 4 Sheets-Sh ee t 1 Filed June 1a, 1925 m M 0 am as" I amnion,

Nov. 17 1.925.

1. FIDLER ET m. v

I MAGNETIC STOP FOR SPINNING HACHINES Filed June 1s, 1923 4 Sheets-Sheet 2 Grammy l. FIDLER ET AL IAGNETIC STOP FOR SPINNING MACHINES 4 Sheets-Sheet 3 Filed June 18, 1923 Nov. 17, 1925. 1,51,-977

I. FIDLER ET AL IAGNBTIC STOP FOR SPINNING IACHINES Filed Juno 1a, 1923 r 4 Sheets-Sheet- 4 Patented Nov. 17,1925.

UNITED STATES- 1,561,977 PATENT OFFICE.

ISAAC FIDLER AND BOY GLERMONT PRESTON, OF HIGH POINT, NORTH CAROLINA,

ASSIGNORS To STEHLI SILKS CORPORATION, OF NEW YORK, N. Y.

MAGNETIC STOP FOR SPINNING MACHINES.

Application filed June 18, 1923. Serial No. 646,085.

To all whom it may concern:

Be it known that ISAAC FIDLER and ROY CLERMONT PRESTON, citizensof the United States, residing at High Point, county of Guilford, State of North Carolina, have invented certain new and useful Improvements in Magnetic Stops for Spinning Machines, of which the following is a specification.

This invention relates to textile machinery, and has special reference to a spinning machine.

More particularly, the invention relates to a magnetic stop for spinners, the same being a device. for shifting the belt to idle position, applying a brake, and operating the take-up latch of the spinner whenever certain abnormal conditions occur in the operating mechanism.

In the operation of spinners of this de scription, the machines are either driven singly from a motor or, as is more usual, are arranged for group drive, one motor being used to drive several machines. Devices have been perfected wherein the breaking-of a thread or threads will effect the stopping of certain parts of the spinning machine, but at times, without any threads being broken, the current for the motor ceases and the machine runs slowly to a stop which results in the imperfect spinning of all the threads on the machine or machines which are driven by that motor. At other times, through some decrease in the current, the motor slows up until the machine or machines drop below the proper spinning speed, and this also results in a defective product;

Thepresent invention contemplates a novel and improved stop motion for spinners of this class wherein any stopping of the motor driving the machine or machines, or any decrease in the speed of that motor below a predetermined point, will result in shifting the belt and applying the brake to the driving means so that the spinner is quickly brought to a stop.

The mechanism employed for this purpose is connected to the means for operating. the spindles, and in machines of this class certain provision is made in'alinost all,up-todate spinners for a fly wheel for steadying.

the operation of the second time spindles,

this fly wheel governing these spindles independently of the first time spindles. U11.-

. driving mechanisms.-

der such circumstances, it will be obvious that if the second time spindles are disconnected, from the first time spindles, suddenly while the machine is running, the fly wheel will continue the operation of the second time spindles for some time after such disconnection.

The present invention also contemplates an improved mechanism wherein the second time spindles will be disconnected from the first time spindles, and the driving means under such conditions as will effect the stopping of the machine from the causes above mentioned, this disconnection being in the way of means for making the drop wire stop off motion inoperative, and thereby preventing the threads from becoming slack or tangling. I

The invention consists in general of an improved mechanism of the class described having certain novel details of construction and combinations and arrangements of parts hereinafter more particularly deacters of reference indicate like parts in the several views, and:

Fig. 1 is an end' view of a machine equipped with a stop motion or magnetic trip constructed in accordance with this invention, the parts being shown running position.

Fig. 2 is a view similar to Fig. 1 with the parts shown in tripped position.

Fig. 3 is'a side elevation of the mechanism illustrated in the other figures, the parts being shown in the position of Fig. 1.

Fig. 4: is a detail section on the line l-4 of Fig. 2.

Fig. 5 is a diagrammatic view of certain electrical connections used when operating a battery of spinners by a single motor.

.in released position, and in dotted lines in normal position.

Figure? is a detail view showing themanner of supporting a swinging shaft forming part of this invention- Figure 8 is a detail diagram showing the connection of this swinging shaft with the Cir In the drawings which are here used to illustrate the application of the invention to a spinner, it has not been deemed necessary to show the spindle and other like parts of the spinner, but it is thought sufiicient to illustrate those parts upon which the invent-ion directly operates, it being under stood that the remaining parts of the spinner which are not illustrated, are those common to machinery of this description. However, there is shown in these drawings one end frame 10 of the spinner, and outside of this frame and extending across the end is the main driving shaft 11, whereon is keyed or otherwise secured a fast pulley 12. A loose pulley 13 is likewise mounted on this shaft so that a motor may be connected to the machine by driving belt 1t, the belt when on the fast pulley 12 driving the mechanism, and when on the loose pulley 13 allowing the mechanism to run idly.

Furthermore, there are fixed on this shaft several other belt pulleys which are belted to certain parts of the spinning mechanism, and two of these belt pulleys 15 are located adjacent the ends of the shaft. Mounted in suitable bearings 16 is a rock shaft 17 whereon is a pair of brake arms 18 provided with brake heads 19 which are engageable, at certain times with the pulleys 15 so as to brake the same and stop the machine. Extending outward from the end frame 10 is a bracket 20 having an upwardly extending portion 21 whereto is fixed a guide bracket 22 extending in parallelism to the shaft 11 above said shaft. Through suitable openings in the guide bracket 22 passes a shifter bar 23, which is movable lon itudinally and lies parallel to the shaft 11. This shifter bar carries a belt shifter fork 24, the arms of which engage the belt 14. By this means movement of the shifter bar in one direction will place the belt on the pulley 12, while movement in the opposite direction will place the belt on the pulley 13. A spring 25 has one end connected to the shifter bar, and the other end to an eye 26 fixed on the bracket, and this spring, being a tension spring, constantly urges the shifter bar to move the belt 14 on to the loose pulley. Extending from the bracket 22 is a short bracket 27 having a forked end 28, and in this forked end is journalled a shaft 29 on which is a crank arm 30 having a. crank handle 31 engaging in a hook 32 fixed to the shifter bar 23. The crank arm and hook are so arranged that with the crank 31 fully fitting in the hook it is swung across the dead center so that the tension of the spring 25 only tends to urge the crank 31 into closer fitting in the hook but when the crank is moved outwardly so the hook passes its dead center the spring will then. act to quickly pull the bar 23 to the left. By this arrangement, movement of the shifter bar in one direction will oscillate the shaft 29 in a corresponding direc tion.

On this shaft 29 is also provided an arm 33 revolubly on the shaft and having an opening 34c therein wherethrough passes a rod On the end of the rod 35 is a collar 36 which is engageable by the arm 33 at a certain period in the operation of the device. This rod 35 is connected to an arm 37 extending rigidly from a brake lever 33, which is fixed on the shaft 17, a similar brake lever 39 being likewise fixed on the same shaft at the opposite end of the device. The brake lever 38 is provided with a lateral lug 40 to which is connected one end of a tension spring 41, the other end being connected to a tension regulating device 42 fixed to the end frame 10. The arrangement of this spring 41 is such that, with the parts as shown in Fig. 3, there is but little tendency for the spring to move the lever The lever 39 is connected to the iron armature held to core 13 of a solenoid A, the energization of which is controlled by the motor current, the solenoid being so arranged that so long as the motor is running at proper speed, current will pass through this solenoid in sufficient quantity to hold the levers 3S and 39 in the position shown in Figures 1 and 3, and thus to hold the brakes out of their operative relation with the pulleys 15. lVhenever the current in the solenoid decreases beyond certain limits, the spring 11 will cause the levers 33 and 39 to rock downward, and in consequence, the rod 35 will be movedso that a collar 415 on that rod will engage the arm 33, and will thus move the crank 31 from its engagement with the hook so that the shifter bar 23 is freed, and movement of the bar to the position shown in Fig. 2 is permitted. This collar 15, in order to break the shock of the bolt on the arm 33 is slidable on the rod 35, and rests against a shock absorbing spring 46 which has its other end bearing against a fixed collar d7. Thus, when the spring 41 actuates the lever 38, the arm is engaged yieldingly by the col.- lar L5.

The second time mechanism is shown in part at the upper end of the figures, and the part shown includes a shaft 1-8, which revolves in fixed bearings and carries a gear 49 which meshes with a gear 50 fixed on a shaft 51 which constitutes the driving shaft of this mechanism, which is driven by some suitable gearing as indicated in Fig ure 8 and which is so mounted as to swing from the position shown in Fig. 1 to the position'shown in Fig. 2. This mounting includes a double arm lever 52, and a tension spring connected to one of the arms of the lever, and constantly urging the gears lufi 49 and 50 out of mesh. In order tohold the gears in mesh, a trip latch 54: is mounted on the end frame, and engages a pin 55 on one arm of the double armlever 52. These parts just described are parts of the spinner itself, and do not form direct partsof this invention. However, provision is made for freeing the latch 54 upon operation of the brake and belt shifter mechanism so that the gears may drop out of mesh, and the shaft 48 continued to run-independently of the shaft 51 and the driving mechanism.

Now the shaft 48 is the shaft which actuates the second time spinners, and consequently, under these conditions, the second time spinners will continue to run until friction works to stop the movement, and will thus prevent slacking and tanglinq of the threads. The disengaging mechanism for the trip latch 54: does form part of the mechanism of this invention.

Extending through guides 56 on the end frame 10 is a trip rod 57, the upper end of which engages a notch 58 in the trip latch 54.. On this rod is a collar 59 which rests against a fork 6O projecting from the rock shaft 17. By this means whenever the rock shaft operates through the action of the spring 41, the trip rod 57 is pushed up and frees the latch 54 from the pin 55, thus permittin" the parts to assume the position shown in Fig. 2.

From the foregoing, it will be seen that upon the solenoid current being so reduced as to permit the iron armature 4:3 to move outward under the influence of the spring ii, the belt will be shifted, the brakes applied, and the second time mechanism disconnected so that the machine is stopped, but the second time mechanism allowed to come slowly to a stop through the friction of the parts.

It is to be observed that the arm 33 is free on its shaft, and that opposite the arm 30 there is provided a bolt or stop 59, which is engaged by the arm 38. The purpose of this is to permit a slight movement of the arm to move the latch arm 33 sufficiently far that the action of the spring 25 may continue the movement, thus turning the parts from the position shown in dotted lines in Fig. 6, to the position shown in full lines in said figure.

In order to prevent minor fluctuations in the current from effecting release of the parts by decreasing the magnetic current,

and also in order to permit, when a single motor is employed for operating a series of machines, one machine to be shut down without effecting the other, a wiring arrangement such as is shown in Fig. 5 can be used. In this wiring arrangement it will be seen that there is provided a pair ofv wires 60 going to the leads of the motor brush, not shown, 0116 of these wires is connected to a relay 61 directly, while the other wire is connected to this relay through the magnets or solenoid let m series. The first wire is likewise connected to the'relay magnets throiwh a resistance 62. By this means, the minor fluctuations above referred to, or the stoppage of one machine in no way affects the solenoids or magnets 4:4 to such an extent as to produce operation of the stop mechanism.

To prevent operation of stop off mechanism dueto voltage fluctuations on line supplying motor the relay above described is provided, the control magnets of which are connected directly across the current leads or power lines. The relay contacts control the current flowing to magnets or solenoids from power lines.

Action of the relay is retarded for several seconds after power interruption by reason of the counter electro-niotive-force' of the motor.

By reason of the time lag due to counter E. M. F. machines. are not shut down by sudden drops or considerable variation in supply voltage. Furthermore, also by reason of the quick breaking action at relay contacts, the magnets in a group act in unison and are practically free from effects of residual magnetism.

o claim: 7

1. A stop action for spinning machines and the like comprising a counter shaft, a

fa t and loose pulley mounted upon said shaft, a driving belt positioned to operate in conjunction with said fast and loose pulleys, a brake drum mounted upon said counter shaft, a brake shaft journaled to oscillate in parallelism with the counter shaft, a brake shoe carried by the brake shaft positioned to engage the drum, a spring tending to move the brake shoe into braking engagement with the drum, an electric motor for driving the counter shaft, an elect-ro-magnet introduced into the circuit of the electric motor tending to hold the brake shoe inop erative against the tension of the spring when the current is normal, and moving means for shifting the belt, the movement of which is initiated by the braking move ment of the brake mechanism.

2. A stop action for spinning machines and the like comprising a counter shaft, a fast and loose pulley mounted upon tht counter shaft, a driving belt operating in conjunction with the fast and loose pulleys, a brake drum mounted upon the counter shaft, a brake shaft j ournaled in parallelism with the counter shaft, a brake'shoe carried by the brake shaft proportioned to engage the brake drum, a spring tending to move the brake into braking engagement with the drum, an electric motor for operatingthe belt, an electro-magnet introduced into the circuit and energized thereby and tending to hold the brake out of engagement with the drum, and the spring at its position of minimum efficiency, movable means for shifting the belt, and means actuated from the braking mechanism to initiate the movement of the belt shifting mechanism.

3. A stop action for spinning machines and the like comprising a counter shaft, a fast and loose pulley mounted upon the counter shaft, a driving belt coacting with the fast and loose pulley, a brake drum mounted upon the counter shaft, a brake shaft journaled in parallelism With the counter shaft, a brake shoe carried by the brake shaft and proportioned to engage the periphery of the brake drum, a spring tend ing to move the brake shoe into engagement with the brake drum, an electric drive for the belt, an electro-magnetintroduced into and energized by the drive circuit and tending to hold the brake shoe out of engage ment With the spring extending substantially across the axis of rotation of the brake shaft, moving means for shifting the belt, and means actuated by the movement of the brake mechanism to initiate the movement of the belt shifting mechanism.

4. A stop action for spinning machines and the like comprising a counter shaft, a fast and loose pulley carried by the counter shaft, a drive belt coacting with the fast and loose pulley, a sliding belt shift mechanism, a spring tending to slide the belt shift mechanism to move the belt on to the loose pulley, means to lock the sliding belt mechanism against the tension of the spring, a

brake drum carried by the counter shaft, a pivoted brake shoe proportioned and P081- tioned to engage the brake drum, an elec tric drive for actuating the driving belt, an electro magnet introduced into the circuit of the electric drive and tending to hold the brake inoperative While the current is normal, and means actuated by the movement of the brake under the tension of the spring for releasing the lock of the belt shifting mechanism.

5. A stop action for spinning machines and the like comprising a counter shaft, a ast and loose pulley mounted upon the counter shaft, a driving belt coacting With the fast and loose pulley, a sliding belt shifting mechanism for moving the belt, a spring tending to move the sliding mecha nism to shift the belt from the fast to the loose pulley, a brake for applying braking tension to the counter shaft,ian electric drive for the driving belt, an electro-magnetintroduced into the circuit of the electric drive and tending to hold the brake normally inactive, means operated by the movement of the brake for initiating the action of the belt shifting mechanism, a secondary drive shaft journaled upon a movable journal, and means actuated from the movement of the brake mechanism for moving the second ary drive shaft from driving to inoperative position.

In testimony whereof We affix our signatures.

ISAAC FIDLER. ROY O. PRESTON.

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