US2546141A - Warp beam stopping mechanism - Google Patents

Description

2 Sheets-Sheet 1 JNVENTOR. ERNEST A. BAUER I Q /"I 7 SL/%M1 ?W% E K BAUER WARP BEAM STOPPING MECHANISM March 27, 1951 Flled Aug 27, 1948 March 27, 1951 E. K. BAUER 2,546,141

WARP BEAM STOPPING MECHANISM Filed Aug. 27, 1948 I 2 SheevLs-Sheet 2 INVENTOR. ERNEST A. BAUER Patented Mar. 27, 1951 WARP BEAM STOPPING MECHANISM Ernest K. Bauer, Mcadville, Pa., assignor to American Viscose Corporation, Wilmington, DeL, a corporation of Delaware I Application August 27, 1948, Serial No. 46,534

' 13 Claims.

1 This application relates to improved brakes for the stopping of large spools or drums, such asare used for the production of warp beams.

.. In beaming machines, the Warp to be wound passes about suitable guiding means to the warp beam as it proceeds from the creel. Under present operating conditions, it is quite common to have a space about eight yards between the front of the creel and the beam but still with the mechanical brakes available on conventional machines, difficulty is encountered in stopping the beam sufficiently quickly to prevent a broken end from becoming buried within the windings upon the beam. Also, in some types of beamers, a brake drum is secured premanently to one or both flanges of the beam or are temporarily fastened to the flanges during the winding operation. In the latter case, the drums are removed after the winding has been completed and are placed upon other spools or beams to prepare them for winding the warp thereon. These brake drums, particularly when of the temporarily secured type, frequently wear down unevenly and in many cases a given pair of drums which may have been subjected to the same amount of braking use may become separated and each of the pair may be paired off with other drums which may not have had the same amount of use. ,When the brake-drums which have been subjected to different amounts of wear become associated with a given beam, trouble arises in the conventional, braking system in that practically all of the braking force is exerted upon a single one of the drums.

lt; is an object of the present invention to provide amore efficient mechanic-a1 braking system which will enable stoppage sufficiently quickly, and in substantially the same period of time regardless of whether the beam is empty or full, of light weight or heavy, to avoid any necessity of unwinding and then rewinding a portion of a beam to find and repair lost ends. In some cases, it is possible to shorten the distance between the creel and the beam. It is a further object of the present invention to provide a braking system with resilient means for distributing the braking force to both drums of a given pair in spite ofany discrepancy in the size of such drums resulting. from different previous braking usage or uneven worn brake shoe lining. Other objects and advantages of the invention will be apparent from the description thereof hereinafter.

1 In the drawing, which is illustrative of the inlemo Figure} is a somewhat diagrammatic side 2 elevation with one of the side frames removed to facilitate a clear showing of the beamer with the invention applied thereto,

Figure 2 is a somewhat diagrammatic vie showing the electrical connection,

Figure 3 is an enlarged view of a detail, and Figure 4 is an enlarged section on line IVIV in Figure 3.

The beamer comprises two side frames 3, of which one is not shown in Fig. l for clarity of illustration. The barrel 4 of the beam (which also has end flanges 5) rests upon two rollers 6 and l. The roller 6 is supported in fixed bearings 8 inthe two side frames and is driven by means of a chain or belt 9 by means of a motor lit The roller 1 extends between two arms H pivotally mounted on bearings [2. Each arm is provided with a gear l3 in mesh with a pinion l4. Normally, during the winding of the beam, the roller 1 is held in the position shown but it may be dropped to facilitate removal of the beam by rotation of the pinions M.

A brake drum I5 is permanently or temporarily secured to each flange of the beam on the outside face thereof. A pair of arms 16 are mounted on a rotatable shaft I? and carry rotatably thereon a pressure roll 18. A handwheel I9 is connected to a rod 20 which is in turn connected to a bevel gear 2i in mesh with bevel gear 22 secured to a shaft 23 carrying a pinion 24 which meshes with a sector gear 25 mounted for rota-v tion with the arms IS. A counterweight 26 car ried on the bracket 21 normally urges the pressure roll l8 toward the beam with a definite force in any given position. However, a rod 28 pivotally secured to the upper end of each arm I6 passes through a snubber 29 pivotally mounted at 38 on each of the side frames 3. This snubber may simply comprise a plate 31 with a grooved guideway for the rod 28 extending therethrough such that the upper surface of the rod is exposed to an upper plate 33 which is pressed against the rod 28 by means of springs 34. The springs back up against the heads of cap screws 35 which extend through openings in the plate 33 and are adjustably secured by screwing into the plate 3|. Brackets 36 extend toward the front of the beamer from each side frame 3 and carry rotatably therein a measuring roll 31 about which the warp 38 proceeds from the creel to the beam. A stub shaft 39 extends from one of the brackets 36 and has pivotally mounted thereon two brake shoes 40, the other ends of which are adjustably secured to a disc 41 pivotally mounted on a shaft 42 extending through the supporting member 43 which is carried also by the measuring roll shaft 44 and the shaft 39. This adjustable securement is effected by means of the screws 45 extending through a swivel joint 45 to eccentric bores 47 in the disc 4|. The shaft 42 has fixedly secured thereto a crank arm 48 to which a link 49 is p-ivotally connected. The link 49 is pivotally connected at 59 to an eccentric ear of a collar (see Figure 2 particularly) fixedly secured to a rotatable brake shaft 52. A lever 53 is also secured to the shaft and a spring 54 secured at 55 to the side frame and at 58 to the end of the lever 53 normally holds the shaft 52 in a position in which the brakes arereleased.

A sector gear 5? is securedto the shaft 52 and serves to rotate the shaft through a sufficient arc to apply the brakes. The sector gear may be driven by a rack associated with a reciprocating motor, such as a hydraulic motor or a core within a solenoid or by a pinion 58 driven by the torque motor 59.

The compressorroll is provided with internal brake shoes Bil connected to a toggle linkage BI and a link 52 which is in turn connected with a lever 53 pivotally mounted at 64. The lever 63 is secured to a connecting rod 95 which is 111 turn secured to a yoke comprising two guide rods 66 extending between two end pieces 51. A rod 68 pivotaliy connected at 69 to arm Ill fixedly secured to the shaft 52, extends loosely through an opening in one of the plates 5'1 to a cross plate II which has bores making a sliding fit with each of therods 99. A nut I2 secures the cross piece II on the rod 88 and the spring I3 normally urges the cross piece II toward the rod 65. By changing the tension of the spring more or less force can be allocated to rod 65.

Automatic means is provided for varying the braking force upon the beam in dependence upon the size of the winding on the beam. This is quite important since the weight of the winding may vary from zero to 500 lbs. during the winding of the beam. The linkage for this system comprises a crank arm I4 fixedly secured to the shaft 52, a rod I5 is connected to arm I4, as at IS. The rod I5 is threaded and receives a nut TI and a washer I8 against which a spring I9 may bear. The rod I5 extends slidably through a sleeve 89 which is threaded into the yoke 8|. A look nut 82 provides for adjustment to any desired position. The sleeve 89 has a shoulder 83 against which the Spring I9 bears. These springs I9 serve to reduce the shock of application of the brakes. Also, when there are brakes at each end of the beam, the two springs I9, in that case, improve the distribution of braking pressure and tend to equalize the pressure of the shoes on one end of the drum I5 to the pressure applied by the brake on the-other end of the drum I5. Stub shafts 84 extend through the side members of the yoke and carry rollers 85 which bear upon an arcuate track 86 which constitutes the upper face of a member 81 having a T-shaped cross section. A bell crank lever 88 is pivotally mounted on one of the side members of the yoke at 89 and carries a roller 99 adapted to bear against the under surface of the track 89 to take up play. A spring 9I extends between a recess 92 in the yoke 8| and the collar 93 on the adjustable screw 94. A link 95 connects the upper end of the arm I6 to one of the side members of the yoke BI and a number of openings 96 are provided in the side member for purposes of adjustment. The member 81 carrying the track 86 ispivotally connected at 97 to the lever 98 which is in turn pivotally connected to the frame at 99. A brake shoe I99 is pivotally mounted at l9! on the lever 98 and a detent screw I02 combined with a spring I93 serve to adjust the shoe with respect to the lever. A detent screw I94 is provided on the lever 98 for adjusting the track 86 relative to lever 98. A slot I95 through which the bolt I05 extends permits this adjustment. After the adjustment, the bolt I96 is tightened to fix the member 81 relatively to the lever 98. When this is done, the lever 98 and member 81 act together as a single lever.

The beam has a brake at each end thereof and the brake linkage just described extends from the brake shaft 52 to each brake, the connection being shown for one of the brakes only in Figure 2.

Figure 2 also shows schematically the drop wires I91 in the wire rod I08 which forms one terminal of an electric circuit. The other terminal is in the form of a rod I99 extending beneath the wires I91. The yarns which pass through the wires III] of a dye-board III and under the hooks of the wires Iii-I, normally hold the wires in an upper position out of contact with the lower terminal I99. However, when a yarn breaks, one of the wires, as at A, falls and makes contact with I99 which closes a circuit comprising the leads H2, H3, the torque motor 59, and the lead [I4 connected to the line II5 constituting the source of electric current. Man-.- ually-operable switches H5 and III may be pro-.- vided to control the circuit independently of the drop-wires. It is to be understood that other connections may depend upon the closing of the circuit by a broken yarn, suchas the interrupt: ing of the circuit to the driving motor for the beam, but such arrangements are conventional and form no part of the present invention, and hence they are included herein without specific description of such conventional features.

The operation is as follows: Incase of the breakage of the yarn, one of the WireSLIOI, such that at A, drops andcloses the circuit to the means for operating the brake, such as the torque motor 59. Of course the brake maybe operated independently of the drop wires, such as by manual closing of a switch II'I. Operation of the torque motor causes rotation of the shaft 52 (in opposition to spring 54) in a clockwise direction, as viewed in Figure 1, into the braking position shown therein. When the measuring roll 37 and thecompressor roll I9 are provided with brakes as well as the beam, all sets of-brakes areapplied substantially simultaneously. Thus, the link 49 turns the disc 4| which causes the measuring roll-brakes 49 to clamp about the surface thereof. Likewise, the rod 98 compresses spring I3 which urges the yoke comprising the end plates 67 and tie rods 96 to pull the rod 65 in an upward direction. This rotates the bell crank lever 53 and the toggle linkage BI expands the internal brake shoes 60 against the inside surface of the portion of compressor roll serving as'the brake drum. The spring I3 assures that the brake is applied without shock and-also that the seizure of the compressor roll I8 by the brakes does not, prevent the application of the brakes to the measuring roll, even if the compressor roll brakes are applied first rather than simultaneously. Likewise, the beam brakes are applied through the action of springs I9. The rotation of shaft 52 moves rod I5 longitudinally so that the washer I8 compresses the spring against the collar 83 of the sleeve 89 secured to the yoke 8|.

The yoke 8| through rollers: 85' presses against --.the track 86 secured to lever 98 so that each i brake I!) is applied resiliently against the drum [5. Again, the springs 19 allow. application of braking force to the brake drums 15 in advance of the application of the brakes 40 upon the measuring roll, and because of the springs, the operator is assured of application of the brakes to the measuring roll even though the brakes are applied somewhat earlier to the drum 3 of the beam and the compressor roll (whichis generally a preferred order or system) It will also be noted that the link $5 swings the assemblage comprising the rod .15, sleeve 80 and yoke 8! through an arc corresponding. to the curve of track 86. This varies the moment arm through which the rod applies force to the beam brake lever 98. Since .the links 95 are connected tov the arms l6, the yokes 81 are moved along the track 86 about in proportion to the diameter of the winding on the beam. Hence the moment of force applied to the brakes on the beam varies with the diameter of the winding thereof so that a greater force can be applied as the winding becomes larger. The ideal condition is that, the brake force on drum I5 increases in direct proportion as the weight of the beam increases with the addition of the yarn. The track 86 may be so located that its arc has its center approximately in the location of pivot 16 particularly after the brakes are applied, but the rollers 85 and ilil carried by the yoke 8| so engage the track 85 that such disposition of the track is not essential and accordingly, the tracks 86 may be adjusted to any position desired and they may have other arcs than that corresponding to a circle concentric with shaft 52.

At the start of beaming, after an empty beam has been inserted, the operator brings the compressor roll into contact with the barrel 4 of the beam by rotation of the hand wheel 19. During winding, the compressor roll swings with the shaft I! in response to the building up of the windings on the beam and rod 28 moves through the snubber 29, which prevents the roll [8 from moving inwardly toward the center of the beam once it has been displaced outwardly therefrom except under the forceful action of th hand wheel [9.

It will be seen that the present invention supplies a brake system for a beam in which the effective force applied to the brakes varies in proportion to the winding of the beam so that as the beam gets heavier, greater force is applied in order to stop the beam reasonably quickly in spite of the increased inertia thereof. In addition, when several elements are to be braked, such as the compressor roll and/or the measuring roll, in addition to the beamer, the provision of resilient linkages assures that the application of the brake to one element does not interfere with the application of the brake to any of the others. This resilient linkage facilitates adjustment of the several sets of brakes for substantially similar functioning through a common brake shaft. In addition, the resilient linkage provides for the evening of the application of breaking forces when the brake drums at the ends of the elements being braked, such as the beams, or the compressor roll, or the like, are worn to different extents. If a rigid link were used in such a system, practically all the braking force would be applied to a single brak drum, that which had the least previous Wear,

6 or, to prevent this, the operator would have to adjust the individual linkages connected with the respective brakes so that both brakes would be applied in nearlyv perfect synchronism. Such an, adjustment .would be extremely time-con,-

' suming and where temporarily attachedqbrake drums are applied ,to the beams during each winding, such adjustment would be needed before each beaming operation, or the operator would .have' to be certain that he used the same pair of brake drums on each beam and in the same position in the beamer each time. 7

Thus,- the present invention provides a more efficient, braking system which means less upkeep and requires a minimum of re-adjustment while allowing of the use (on the beams) of either p;rmanently or temporarily attached brake drums whch need not be precisely Paired .in terms of the diameter of braking surface.

The present system also provides a reasonable latitude in the adjustment required for proper synchronization of the application .of the brakes to two or more rotating elements, such as to the beam and compressor roll or to the beam and both the compressor roll and the measuring roll.

It is to be understood that the description hereinabove is illustrative and that changes and variations may be made without departing from the spirit and scope of the invention as disclosed in the appended claims.- I

I claim:

1. In a beaming apparatus comprising a flanged beam, means for rotating the beam, a rotatable compressor roll, means for mounting the roll swingable about an axis outside its periphery, and means for urging the roll toward the center of the beam into a position of rest against the outer of any windings thereon, the combination with a braking system comprising a brake drum secured for rotation with the beam, a brake lever, a brake shoe carried by the lever, a rotatable brake shaft, means for rotating the shaft to apply the brake, a linkage between the shaft and the lever to apply the brake upon rotation of the shaft, and means for varying the position of connection between the linkage and the lever in dependence on the diameter of winding on the beam.

2. The combination of claim 1 in which the linkage is connected to a crank arm secured to the brake shaft and a link connects the linkage to the mounting means for the compressor roll and thereby serves to vary the position of connection of the linkage with the lever.

3. The combination of claim 2 in which the brake lever comprises an adjustable track, and the linkage is movable along the track.

4. The combination of claim 3 in which the linkage comprises rolling elements for engaging the track. i

5. The combination of claim 4 in which the linkage comprises a resilient member for transmitting the force derived from the brake shaft to the brake lever.

6. In a beaming apparatus, a braking system comprising a brake drum secured for rotation with the beam, a brake lever, a brake for engaging the drum carried by the lever, a rotatable brake shaft, means for rotating the shaft for applying the brake, a resilient linkage connecting the shaft to the lever, a rotatable compressor roll resting against the windings of the beam, means for swingably mounting the roll, a brake for the roll, and a linkage connecting the brake shaft to the roll brake, said last-mentioned linkage 'compr'ising'a resilient member for transmitting the forcefrom the shaft tothe brake 7. The apparatus of claim 6 comprising a measuring roll, a brake therefor, and a linkage connecting the brake shaft to the measuring roll brake.

8. Theapparatus of claim 7 comprising a link extending from the compressor roll mounting means to the beam brake linkage for shifting the position of said linkage along the beam brake lever independence on the diameter of the wind- 2.

9. In a beaming apparatus comprising a flanged beam, means for rotating the beam, a rotatable compressor roll, means for mounting the roll swingable about an axis outside its periphery, and means for'urging the roll toward the center of the beam into a position of rest against the outer of any windings thereon, the combination with'a braking system comprising a braking surfacesecured for rotation with the'beam, a brake lever, a brake shoe carried by the lever, a 1'0- tatable brake shaft, means for rotating the shaft to apply the brake, a linkage between the shaft linkage is connected to a crank arm secured to the brake shaft and a link connects the linkage to the mounting means for the compressor roll and thereby serves to vary the position of connection of the linkage with the lever.

11. The combination of claim 10 in which the brake lever comprises an adjustable track, and the linkage is movable along the track.

12. The combination of claim 11 in which the linkage comprises rolling elements for engaging the track.

13. The combination of claim 12 in which the linkage comprises a resilient member for transmitting the force derived from the brake shaft to the brake lever.

ERNEST K. BAUER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,196,435 Cyr Aug. 29, 1916 1,794,345 Trevett Feb. 24, 1931 2,342,151 Lambach Feb. 22, 1944 2,347,198 Lambach Apr. 25, 1944 2,381,670 Kurkjian Aug. '7, 1945 2,396,377 Kurkjian Mar. 12, 1946

Images