US1828259A - Driving mechanisms for flyers - Google Patents

Description

H. SGI- I NEIDER DRIVING MECHANISI FOR FLYERS 3 Sheets-Sheet 1 Filed June 7, 1930 '2' m azm m Oct. 20, 1931. SCHNEIDER 1,828,259

DRIVING MECHANISM FOR FLYERS Filed June 7, 1930 3 Sheets-Sheet 2 a Z I 2/ I j'm azmpm Oct-20,1931. H. SCHNEIDER I 1,328,259

DRIVING MECHANISM FOR FLYERS I Filed June 7 19:50

3 Sheets-Sheet 3 m m m Patented Oct. 20, 1931 UNITED STATES HEINRICH SCHNEIDER, OF ZURICH, SWITZERLAND DRIVING MECHANISMS FOR FLYERS Application filed June 7, 1930; Serial No My invention relates to improvements in driving mechanisms for flyers and more particularly in driving mechanisms in which the fiyer is mounted on a spindle driven by an electro-motor and mounted so as to rotate nearly without friction. The object of the improvements is to provide a mechanism in which the disturbances in the operationof the fiyer are prevented which are caused when spinning threads with a high twist. I have found that under such circumstances the flyers are slightly turned backwardly by the tension of the thread when arresting the machine so that the said thread is formed into a loop and wound around the eye of thefiyer. Further, when spinning yarn with heavy braking action and by means of machines having strong electric motors, a torn thread cannot be readily applied to the spindle by merely throwing the fiyer into operation after arresting the hollow spindle thereof and passing the torn thread upwardly through the same while the other motors are in operation, because the starting moment of the motor tends to accelerate the heavy spindle thus causing a high tension of the thread'so that the attendant can not hold the endof the thread in his hand.

My invention consists in providing braking means in connection with the spindle of the flyer which are thrown into operation after throwing the whole machine out of operation and when the moment of the motor falls below the tension of the threads, and when the thread is applied to a single spindle while the other spindles continue their operation.

For the purpose of explaining the invention several examples embodying the same have been shown in the accompanying drawings in which the same reference characters have been used in all the views to indicate corresponding parts. In said drawings Fig. 1 is a sectional elevation showing a fiyer and its driving mechanism,

. 459,759, and in Germany June 17, 1929.

Fig. 2 is a sectional plan view taken on the line 2'2 of Fig. 1,

Fi 2a is a similar sectional plan view showing a modification, t

Fig, 3 is a sectional elevation showing another modification,

Fig. 4 is a sectional plan view takenon the line 44 of Fig. 3,

Fig. 5 is a partial sectional elevation of the fiyer shown in Figs. 3 and 4 and illustrating the electrical operating mechanism thereof,

F 1g. 6 is a sectional plan view taken on the line 6-6 of Fig. 5, and

Fig. 7 is a similar sectional plan view showing a modification.

In the example shown in Figs. 1 and 2 the mechanism comprises a casing 1 and an electric motor having a stator 2 and a rotor 4. The windings have been omitted for clearness sake. The rotor is secured to a vertical spindle 3 mounted in anti-friction bearings 5 and 6. To the top end of the spindle a cap 7 is secured which is formed with recesses 71 receiving brake blocks 8 acted upon by springs 9. The inner faces of the said brake blocks carry linings 10 having a high coefiicient of friction, which linings are adapted for frictional engagement with a flange 11 provided on the top wall of the casing 1. The hub of the disk 7 clamps the inner race ring of the anti-friction bearing 5 in position and provides a protective shield for the said anti-friction bearing.

While the spindle 3 is out of operation the brake blocks 8 are pressed by the springs 9 into frictional engagement with the brake ring 11 thus preventing rotation of the spindle 3. The tension of the springs 9 need be only such that the highest possible tension of the thread being spun does not overcome the friction when the parts are at rest. When energizing the motor rotary movement is im parted to the fiyer spindle 3 against the action of the brake blocks 8. After a certain number of' revolutions has been attained the brake blocks are thrown out of frictional engagement with the ring 11 whereupon the spindle 3 is freely rotated. hen the motor is thrown out of operation, and the number of revolutions of the spindle falls off the power of the springs 9 exceeds the centrifugal force so that the brake blocks engage the ring 11 and prevent return movement of the fiver 50 when the spindle is arrested.

L In the construction so far described the brake blocks 8 have the function of weighted bodies exposed to centrifugal action. In Fig. 264 I have shown a modification in wlnch the brake blocks are in the form of levers 13 rockingly mounted on pivot bolts. The springs 9 are embedded in sockets 131 of the levers 13.

In the modification shown on Figs. 3 and 4 a spider is fixed to the spindle 3 between the motor and the flyer 50, the said spider comprising a hub 16 secured to the spindle and arms 17 carried by said hub. concentrically of said spider an electromagnet .18 mounted within the bottom part of the casing 1 which electromagnet comprises an annular yoke 19 and field windings 18. Preferably the d1stance between the field poles of the yoke is equal to the distance between the arms of the spider.

In the operation of the apparatus the electromagnet is automatically energized by means of contacts subjected to centrifugal action when the number of revolutions of the motor is reduced below a certain limit, the said contacts closing the circuit of the windings of the elect-romagnet, while the said circuit is broken when the number of revolutions rises above the said limit. For clearness sake the said contacts have not been shown in Figs. 3 and 1, but the electrical construction will be understood from Figs. 5 and 6.

is shown in these figures, the annular yoke 19 of the electromagnet carries two annular contact members 20 and 21 separated from each other and from the yoke 19 by insulating material (not shown in the figures), so that the current cannot pass from the rings 20 and 21 to the yoke 19. To the bottom side of said yoke a contact 22 is secured, which is likewise insulated relatively to the yoke. The outer ring 20 and the lower ring 22 are connected respectively with leads 23 and 2 1. The rings 20 and 21 are adapted to be elec trica-lly connected by a contact piece 22 mounted on an arm 26 made from elastic and insulating material such as whale bone, wood, bakelite and the like. As appears from Fig. 6 the said ring is curved and it is fixed to the shaft 3 by means of an eye 17. The ring 21 is electrically connected with the windings 18 mounted on the poles of the yoke 19. The said windings are either connected in shunt, separate leads being provided for connecting each winding with the ring 21, or all the windings are connected in series, a single lead 28 being provided for connecting the ring 21 and one of the windings, so the wind-' ings are successively connected with each other while the last winding is connected by a lead 29 with the lower ring 22. If the windings are connected in shunt leads are provided for connecting each winding with the lower ring 22.

In the example shown in the figures the windings 18 are connected in series and for clearness sake the leads connecting successive windings have been omitted.

The curvature of the arm 26 must be such that the contact piece 25 cannot be brought by centrifugal action above the rings 20 and 21 for electrically connecting the same, but that it is rocked beyond the same at high velocity, so that the electrical connection is broken. When the electric motor is started the contact piece 25 engages the rings 20 and 21 at a certain number of revolutions thus electrically connecting the same. Now the current flows from the lead 23 to the ring 20, the contact piece 25, the ring 21, the lead 28, the windings 18, the lead 29, the lower c0ntact ring 22 and the lead 2 1. \Vhen further increasing the number of revolutions the arm 26 is further rocked into position for setting the contact piece 25 beyond the inner ring 21, thus breaking the connection between the rings 20 and 21 and interrupting the current.

In Fig. 7 I have shown a modification in which in lieu of the curved arm 26 a stem 30 is provided which carries the contact piece 25 and is slidable in a sleeve 31 fixed to the shaft 3 by means of an eye 2. WVithin the sleeve 31 there is a spring 32 engaging the head formed at the inner end of the stem 30 and bearing with its outer end on an inwardly directed flange of the sleeve 31. \Vhen starting the electromotor the contact piece 25 is thrown outwardly by centrifugal action, as is shown in Fig. 7 in dotted lines, thus connecting the rings 20 and 21. Then further increasing the number of revolutions and the centrifugal force the contact piece 25 is further thrown outwardly thus breaking the connection between the rings 20 and 21.

In another modification brake blocks are mounted 011 levers adapted to be rocked by springs into releasing position and acted upon by an electromagnet throwing the same into braking position or vice versa, suitable means being provided for controlling the supply of current to the electromagnets.

I claim:

1. In a spinning apparatus, a flyer, a motor for driving the same, a brake block rotatable with said fiyer and movable in response to centrifugal action out of braking position, and yieldable means counter-acting said centrifugal action.

2. In a spinning apparatus, a flyer, a spindle carrying the sm a m'o'tor' 'on'said spindle, a casing enclosing said motor, a disk on said spindle above said casing, and brake blocks on said disk controlled by centrifugal action and mounted for movement thereby out of braking position.

3. In a spinning apparatus, a flyer, a spindle carrying the same, the motor on said spindle, a casing enclosing said motor formed at its top with an upwardly directed flange antifriction bearings in which said spindle is rotatable, one of said anti-fricton bearings having its outer race ring mounted on said flange, a disk on said spindle above said casing in position for clamping the inner race ring of the bearing having its outer race ring mounted on said flange and formed with a rim embracing said flange, brake blocks radially movable on said ring and adapted for braking engagement with said flange, and springs tending to force said brake blocks into braking engagement with said flange.

4. In a spinning apparatus, a flyer, a motor for driving the same, an electromagnetic brake for braking said flyer, and a circuit make and break device controlling the speed of the flyer and operable by centrifugal action to render said brake inefi'ective.

5. In spinning apparatus, the combination with a flyer, of a motor for driving said flyer, means for retarding rotation movement of said flyer, and means operable upon reduction of the speed of the flyer for rendering said flyer retarding means effective.

6. In spinning apparatus, the combination with a flyer, of a motor for driving said flyer, means for retarding rotational movement of said flyer, and means rotated by said motor and operable by centrifugal force to render said flyer retarding means ineffective.

7. In spinning apparatus, the combination with a flyer, of a motor for driving said flyer, means for retarding rotational movement of said flyer, and means operable when the motor is regulated so that the torque developed thereby is less than the thread tension for rendering said flyer retarding means effective.

8. In spinning apparatus, the combination with a flyer, of anti-friction bearings supporting said flyer for free rotation, a brake associated with said flyer and tending to prevent reverse rotation thereof in response to thread tension, and means controlled by the speed of rotation of the flyer for rendering said brake effective when such speed falls below a predetermined rate.

9. In spinning apparatus, the combination with a flyer, of anti-friction bearings supporting said flyer for free rotation, a braking element rotatably connected to said flyer, and relatively stationary means normally engaged by said element to retard rotation of said flyer, said braking element being movable under the action of centrifugal force out of flyer retarding position.

10. In spinning apparatus, the combination with a flyer, of anti-friction bearings supporting said flyer for free rotation, an electromagnetic brake associated with said flyer and tending to prevent reverse rotation thereof in response to thread tension, and means controlled by the speed of rotation of the flyer for rendering said brake effective when such speed falls below a predetermined rate, said means including a device rotatably connected to said flyer and movable with respect thereto under the action of centrifugal force to control said electromagnetic means.

In testimony whereof I hereunto afiix my signature.

HEINRICH SCHNEIDER.

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