US2202530A - Brake - Google Patents

Description

May 2 1940.

' H. C. LlVERlNG HOUSE BRAKE Filed Feb. 13, 1940 INVENTOR.

BY ,[e

A TTORNEYS Patented May 28, 1940 Harry 0. Liver-ingho use, P ovidence, .R. 1., as-

signor to United States Rubber Company,-New i York, N. Y., a, corporation of New Jersey Application February 13, 1940, Serial No. 318,677

5 Claims. (Cl. 5716) This invention relates to improvementsv in;

braking mechanisms for core covering machines. In the Getchell Patent No. 1,970,228 for Core covering machines there is shown, described and 5 claimed brake mechanism associated wit the hollow spindle of a core covering unit, and

adapted to bring the spindle to rest quickly when the current to its operating motor is cut off. The

brake mechanism disclosed by this patent com I; prises a brake disc 46 secured to thelower end of the hollow spindle in spaced relation to its operating motor, and there is slidingly mounted,

about the hollow spindle between the disc 46 and the lower end of the motor casing a brake actuat .ing collar 58 which is continuously urged by a coiled spring 54 towards the brake applying position. During the normal running operation the collar 58 is held raised in itsinoperative position by a lever 5| which is pivotally mounted upon a projection 54 extending down from the motor casing 29.

This covering machine of the Getchell patent is a good practical construction and has been used for years to produce largequantities of elastic yarn. Recently, however, steps have been taken to increase the speed'at which the hollow covering spindles of j the Getchell ma! chine are operated, to thereby operate these spin- 7 (lies at a speed of 14.000 M. or higher. It is found in practice that the vibration imparted to the motor casing 29 by thisincreased speed and to thebrake mechanism supported from the motor casing causes excessive wear of the brak-j ing parts. g

The present invention, therefore, contemplates improved braking mechanisms over that of the Getchell patent whereby the braking parts are relieved from the objectionable vibrationsof the motor that operates the hollow covering spindle.

In the Getchell patent there is disclosed a vertically sliding rod M6 adapted to be manually op-' crated to control the covering operation. The

primary feature of the present invention residesin a novel construction whereby one of the braking elements is supported by this vertically slidi'ng rod entirely independently of said motor for movement into and out of engagement with the other braking element secured tothe hollow spine die of the operating motor.

A further feature of the present invention re sides in means for-yieldingly and rockingly supporting the braking element carried by said manually operated rod, and in means for normally holding this braking element in approximately tion.

parallel relation with the rotating braking element.

and novel combination of parts will be hereinafter described in connection with the accom- The above and other features of the invention panying drawing which illustrates one good practical form thereof.

In the drawing:

Fig; l is a vertical sectionalview through a core covering machine provided with the braking mechanism of the'present invention, the brake being shown inthe oil? position.

Fig. 2 on a larger scale is a top planview of that portion of thebraking mechanism which is supported below and independently of the operat ing motor; and

Fig. 3 is a sectional view taken on the line 3--3- of Fig l, the brake being shown in the on The braking mechanism of the present invention may be employed upon various typesof core covering machines and in the construction shown posi only one core covering unit is illustrated, but the frame and 'core being covered are shown as broken'away, as it is contemplated that asecond covering unit may be employed below the first as shown in the Getchell patent above cited.

The machine illustrated has the upright end frame II! to 'whichare' secured the horizontally extending rails ll and 12. The rail H has se cured thereto an electricv motor 13 provided with a rotor M which is mounted upon and drives thehollow spindle l5 through which'spindlethe core 16 to be covered passes." This spindle 15 in the construction shown is provided at its lower end 1' witha brake disc l1, and upon the portion of the spindle I! that" projects upwardly some distance sabove the motor 'is mounted the yarn supply package l8 which package rotates in anopening formed in-the plate I 9 that is supported from the rail ll by the upright 20. Upon the plate 18 is mounted the usual ring 2| and traveler '22 through which-the covering yarn 23 passesv as it- 'unwinds from the package l8 and is wound about the core it by the rotation of the yarn package 5 l8 and supporting spindle l5; Above the upper end of the spindle I5 is supported a guide 24,

through which the covered core passes in an upward direction towards the take-up mechanism to be'described. I I

The present invention is well adapted: for use 0n covering machines adapted to cover wire, rubber thread or other types of cores, but thecore let-off and take-up mechanism shown has been designed moreparticularly for use in core cover,-

ing machines for covering rubber thread where it is important to control the stretch of the rubber thread while the cover is being wound thereupon.

In the construction shown the core l6 to be covered is led upwardly from a supply spool adapted to rest upon and be rotated in the unwinding direction by the power driven cork roll 25. The arrangement is such that the spool 25 will be rotated at a uniform peripheral speed irrespective of the amount of core thread wound thereupon. This spool is held in place upon the driving roll 26 by a bifurcated bracket 2'! having the slotted portions 28 adapted to receive trunnions upon the spool 25 and to support the spool so that it may be moved into and out of engagement with the driving roll 26 as more clearly I set forth in the Cobb Patent No. 1,976,328, for Apparatus for making elastic yarns.

The covering machine illustrated in the draw ing appears to be provided with only one covering motor it but it will be understood that this machine may be provided with a large number of these covering units arranged side by side lengthwise of the rail H. It is therefore dcsirab-le to provide mechanisms whereby the operator may start or stop the operation of any one covering unit without disturbing the other units. To this end each covering unit may be provided with manually controlled mechanism for starting and stopping the travel of the core upwardly through the covering spindle and for starting and stopping the rotation of the hollow spindle, as more fully set forth in the two patents above cited.

In the construction shown the covered core upon leaving the guide 2d passes around the lower nip roll 28 and between it and the upper nip roll 39. It then passes upwardly through a guide eye on the traverse mechanism 3! and Lthen to a take-up spool or reel such as 32. The

nip rolls 29 and iii are rotated by the power driven roll 33 and the take-up roll 3?. rests upon and is driven by the power driven roll 34. The nip rolls 2s and 39 are held in operative rela tion with each other by the bifurcated bracket 35, and the takeup spool 32 is similarly supportedby a bifurcated bracket 36.

It should be noted that the brackets 21, 35 and 3% are all secured to a manually operable vertically sliding rod 31 so that this rod when moved upwardly from the position in which it is shown in Fig. 1, by the operating handle 38, will raise the let-off spool 25, the nip rolls 29 and 3B and the take-up spool 32 all out of engagement with their respective driving rolls to thereby arrest the upward feed of the core E6. The operating lever 38 is .pivotally supported between its ends at 39 from the rail H, and has the end 46 which is operatively connectedwith the sliding rod 31. The movement of the lever 38 to raise the rod 3'3 and stop the covering operation may serve also to operate an electric switch ii to thereby cut off the driving current to the motor [3.

It is desirable to stop quickly the rotation of the spindle it? after the driving current for the motor l3 has been cut off, and to this end the braking mechanism which will now be described has been provided. The hollow spindle l5, as above stated, has rigidly secured adjacent its lower end the brake disc I? which may be formed of metal.

In accordance with the present invention the braking element which cooperates with the brake disc H is supported by the sliding rod 31 independently of the motor It so that during the normal operation of this motor the motor vibrations will not be imparted to such braking element. To this end in the construction shown, there is mounted upon the rod 31, a bracket 42. This bracket preferably has a flat upper surface and a clamping bolt 43 whereby a resilient supporting arm for the braking element may be adjustably secured to this bracket. The braking element is shown as comprising the brake plate 44 which may be stamped out of sheet metal and has secured to its upper face a cork washer or disc 45 adapted to frictionally engage the braking disc IT. The brake plate 44 is shown as having the downwardly extending ears 4'5 adapted to rockingly receive trunnions 41 formed at the outer ends of the looped spring arm 48 which yieldingly supports the brake element and is clamped to the bracket 42 by the bolt 43. The purpose in pivotally supporting the brake plate 44 is to cause its cork surface 45 to butt firmly against the brake disc ll. It is desirable, how' ever, to provide means for holding this braking element in substantially parallel relation with the brake disc ll when the brake parts are out of engagement with each other as shown in Fig. 1. This is accomplished in the construction shown by providing the coiled spring 49, one end of which is secured to an edge of the brake plate 44 while its other end is secured to a projection 50 upon the bracket A2.

It is found in practice that when the braking element M and associated parts are supported as herein contemplated so that they are not subjected to the vibrations of the running motor it they will give much better service than when subjected to such vibrations as in the construction of the Getchell patent above cited. Furthermore, the construction of the present invention is simple and inexpensive to manufacture and the sliding movement of the manually operative rod 3'! serves in a highly satisfactory manner to apply the brake when this rod is raised to stop the rotation of the motor and feed of the core, and to relieve the brake when this rod is lowered to start the winding operation.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1'. In a core covering machine, in combination, r

a hollow spindle, means for advancing a core to be covered through said spindle, an electric motor for Winding a cover upon said core and provided.

with a rotor mounted on said spindle to rotate it, a brake disc secured to said spindle, a manually operable sliding rod adjacent said motor and operable to control the covering operation, a spring arm projecting laterally'from said rod, and a brake element supported by said arm independently of said motor and adapted to be moved by said rod into and out of braking engagement with said disc, whereby said arm and element are relieved from the motor vibrations.

2. In a core covering machine, in combination,

a hollow spindle, means for advancing a core to be covered through said spindle, an electric motor for winding a cover upon said core and provided with a rotor mounted on said spindle to rotate it, a brake disc secured to said spindle,

a manually operable sliding rod adjacent said motor for controlling the covering operation, a spring arm projecting laterally from said rod, and a brake element pivotally supported by said arm independently of said motor for movement by said arm into and out of braking engagement tor for controlling the covering operation, a spring rotate it, a brake disc secured to said spindle, a

manually operable sliding rod adjacent said motor for controlling the covering operation, an arm projecting laterally from said rod, and a brake element supported by said arm independently of said motor and adapted to be moved by said rod into and out of braking engagement with said disc, whereby said element is relieved from the motor vibrations.

4. In a core covering machine, in combination,

a hollow spindle, means for advancing a core to be covered through said spindle, an electric motor for winding a cover upon said core and provided with a rotor mounted on said spindle to rotate it, a brake disc secured to said spindle, a manually operable sliding'rod adjacentsaid moarm projecting laterally from said rod, a brake element pivotally supported bysaid arm independently of said motor for movement by said arm into and out ofbraking engagement with said disc, and a spring for yieldingly holding, said pivoted element substantially parallel to said disc;

5. In a core covering machine, in-combination, a hollow spindle supported in an upright position, means for advancing a core to be covered through said spindle, an electric motor for winding acover upon said core and providedwith a rotor mounted onsaid-spindle to rotate it, a brake disc secured to the lower end of said spindle, a manually operable rod mounted for vertical movement to control the coveringoperation', a spring arm projecting laterally from said rod, and a brake element supported by said arm'below said disc and. independently of said motor and adapted to.

be raised into frictional engagement with said 20 disc as said rod is raised to stop the covering operation, f y HARRY C. LIVERINGHO USE.

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