US2525929A - Reversing mechanism - Google Patents

Description

oci. 17, 195o A. Menen' 2,525,929A Y REVERSING MECHANISM Filed July 13, 1948' s sheets-.sheet 1 Oct. l' 7, 1956- A. MEIJER 2,525,929

` gEvERsiNG MECHANISM Filed July' is, 194s s Sheets-:sheet 2 ARTHUR MEDER oet. 17, 195o Filed July l5, 1948 Y) Patented Oct. 17, 1950 REvERsING MECHANISM Arthur MedeLCarlstadt, N. J., assigner to Celanese Corporation of America, a corporation of Delaware Application July 13, 1948, Serial No. 38,510

This invention relates `to a reversing mechanism and relates more particularly to a reversing mechanism adapted for use with textile winding apparatus.

In the production of cheeses, pirns and other yarn packages it is necessary to guide `the yarn back and forth along the length of the package during the winding operation. Various camming arrangements have been proposed to actuate the yarn guide means, but the. cams in all of them have been subject to uneven wear since the force required to reverse the yarn guide means at each end of its stroke is greater than the force required to move the yarn guide means in one direction. It has not been feasible to adjust the cam follower to compensate for the wear on the cam, because the wear is localized at a few points, with the result that frequent replacement of the cams has been necessary. Cam replacement involves a considerable expense as the cams employed are not standardized and must be manufactured specially for each application. Moreover, the winding machine must be shut down during cam. replacement, entailing still further loss. A

I t is an important object of this invention to provide a novel reversing mechanism which will be free from the foregoing and other disadvantages and which will be especially simple in construction and efficient in use.

A further object of this invention is to provide a novel reversing mechanism constructed of relatively simple mechanical elements which will not be subject to uneven wear.

Other objects of this invention, together with details of construction and arrangement of parts, will be apparent from the following detailed description and claims.

In the accompanying drawings wherena preferred embodiment of my invention is shown,

Fig. 1 is a vertical sectional view of the reversing mechanism.

Fig. 2 is a plan view of the reversing mechanism, with the cover removed,

Fig. 3 is a sectional view taken on line 3 3 in Fig. 1 showing the driving gears and keys,

Fig. i is a sectional View taken on line 4-4 in Fig. 2, and y l'ig. 5 is an exploded detail view of the keying means.

Referring now to the drawings for a detailed description of this invention, the reversing mechanism is shown as itis applied to a twistercheeser for simultaneously winding two rows of cheeses by cork-rolls II and I2, employing trav- @'I all mounted on the shaft 32.`

ing a limited angular rotation, as will herein-` 5 Clams. (Cl. 74-34) erse bars I3 and I4 for supporting and traversing any suitable yarn guide means as is well understood in the art. Ends IG and I'I` of the cork rolls I i and I2, drvenby any suitable means` (notshown) are journalled ina gear box, in-` dicated generally by reference numeral E8. Suit-` able gearing in said gear box I8 driven by cork roll I2 drives a pulley I9 which in turn drives a pulley 22 by means of a belt 2|, thereby rotating shaft 22, which is suitably supported in bearing blocks 23 and 24. Fastened to the end of shaft 22 is a bevel gear 26, which meshes with and drives a bevel gear 2l' having fastened thereto a ring gear 28 by means of screws 2Q, A hub 3| integral with the bevel` gearV 2l extends through the ring gear 28 and acts as abearing for mounting the assembled gears for free rotation on shaft 32. The shaft 32 is rotatably supported by lower plate 33 and upper plate 34 in bearings 36 and 'trespectively;

rlhe assembly comprising the bevel gear 2l and the ring gear 28 is spaced from the bearing 36 by means of a washer 3B and a collar 39 and from the bearings 31 by means of a collar A keyt2 havafter appear, is mounted in la, keyway 9i3 in the shaft 32 and a keyway M in the hub 'V3I of `the bevel gear 21. The lower portion of the key 42 passes through a keyway i6 in the collar 39 and bears against the washer 38, whereas the upper Vportion of the key 42 passes through a keyway 41 in the collar 4I and has integral therewith a linger IIB extending at right angles therei `to which`passes through an opening t9 in the collar 4I. Between the ends of the key i2 there is `a cut-out portion 50 which is somewhat longe;` than the hub 3I of the bevel gear 21 permitting the bevel gear 2'! to rotate freely about the shaft 32 when the key 42 is in the positionf'shown in the drawing. Angular rotation of the key i2 will lock the hub 3| of the bevel gear 2l to the shaft 32 and transmit a driving force between them, as will be described in greater particularity below.

A shaft 5I is mounted parallel to the shaft 32 and is supported in bearings 52 and 53` in the plates 33 and 32 respectively. The shaft 5i carries a gearfE which meshes with and is driven by the ring gear 28. The gear 5S `has integral therewith a hub 51 mounted for free rotation about the shaft 5I, the hub being spaced I from the bearing 52 by a washer 52 and'arlcollar 59 and from the bearing 53 by a @Quartu `A` key 63 identical With the key 42 is mounted in 3 a keyway @4 in the shaft 5l and in a keyway E5 in the hub 5l of the gear 56, .and like the key 42 is provided with a cut-out portion S1 somewhat longer than the hub 5l of the gear 5S. The lower end of the key 63 passes through a keyway 68 in the collar 5% and bears against the washer 58, whereas the upper end ci the key 53 passes through a keyway Se in the collar di and is provided with a ringer 'H extending at right angles thereto vwhich passes through an opening l2 in the collar di. The key 53 will furnish a driving connection between the gear 45 and the shaft 5l when it is in the position shown in the drawing. Angular rotation of the key E3 to a neutral position such as that occupied by the key 42 will break the driving connection between the gear 53 and the shaft 5I and permit them to rotate freely relative to each other as will be shown below.

Adjustable stops 'I3 and lil are provided on each side of the shaft 32 and are positioned to strike the finger 48 of the key Il?. and rotate the key from 'the neutral position to the driving position and back again. The stops la and 'lll are thread.- ed through brackets 'l5 and il depending from the p1ate`34 and carry lock-nuts 'ES and 'i9 to hold them in any adjusted position. Similar stops 8i and E2 are provided on each side of the shaft 5I in a position to strike the lnger 'il of the key G3 and rotate the key from the driving position to the neutral position and back again, being threaded through the ybrackets 33 and Sil depending from the plate S4. Like the adjustable stops T3 and 'i4 the adjustable stops 8l and 32 carry lock-nuts 86 and 8l.

Mounted on the 'upper end of the shafts 32 and 5l are pinions 88 and Sil which are keyed to their respective shafts by means of keys 9| and 92. The pinions S8 and 8S drive racks 93 and 94 which are slidably supported on blocks 9S and QI and are held in place on the blocks by means of lthe traverse bars i3 and I4 to be adjusted as desired.

The entire reversing mechanism is enclosed in a casing lll having a cover i l2 Aand a bottom plate H3. An oil sump H4 and a drain plug H5 are provided in the bottom plate, and during operation of the reversing mechanism a level of oil is maintained within the casing il! to provide eiective lubrication for all the moving parts. Hand holes II'I and H8 in the `casing permit adjustment -oi the position of the rods I and lill without the necessity of removing the cover H2.

'Ihe reversing mechanism is shown in the drawings with the key 42 in the neutral position between the gear 2l and the shaft 32 and with the key 63 in the driving position between the gear 56 and the shaft 5l. In operation, with the bevel gear 21 and the ring gear 28 rotating freely about the shaft 32 in a counter-clockwise direction as viewed from above, the gear 56 and the shaft 5| will be driven clockwise carrying the rack 93 and the traverse bar I3 to the left and the rack 94 and the traverse bar l to the right. The motion of the racks 93 and 94 will be trans- .mitted to the shaft 32 by means of the pinion 88 thereby driving the shaft 32 and the key 42 in a clockwise direction. As the shaft 5I moves clockwise it will carry the iinger Il of the key 63 into contact with the stop 3l thereby rotating the key E3 from the driving to the neutral position. Simultaneously the motion of the shaft 32 will carry the finger 48 of the key 42 into contact with the stop 'M thereby rotating the key 42 from the neutral to the driving position. The normal clearances between the various gears will permit the key 42 to become engaged between the shaft 32 and the gear 21 before the key 63 is fully disengaged, thereby insuring a smooth pick-up of driving power by the shaft 32. The continued rotation of the bevel gear 2l and ring gear 23 in a counter-clockwise direction will now drive the shaft 32, the key 42 and the pinion 88 in a counter-clockwise direction reversing the direction of motion of the racks and the traverse bars. The motion of the racks will be transmitted to the shaft 5i by means of the pinion 89 thereby rotating the shaft 5l and the key 53 in a counterclockwise direction. As the key G3 approaches the stop 82 the key l2 will approach the stop I3 to effect the simultaneous operation of both keys to'again reverse'the motion of the racks and traverse bars.

It may be seen vthat the reversing mechanism of this invention is built almost entirely of relatively simple mechanical elements and is so constructed as to be freeof uneven wear. In addititon, any wear which does occur may be readily compensated for .by suitably adjusting the stops which operate the keys.

Various modications may be made in the reversing mechanism of this invention without effecting its mode of operation. For example, one of the racks may be eliminated if it is desired to drive only one traverse bar although lit is preferable, even in this case, to retain both racks and thereby achieve .a balanced construction. Furthermore it is entirely feasible to drive the reversing'mechanism without employing the bevel gears shown, so long as a suitable driving ,means is furnished for-one of the gears which is alternately engaged and disengaged from its supporting shaft.

Itis to be understood that the foregoing detailed description is given merely by way of illustration and that many variations may be made therein without departing from -thefspirit of my invention.

Having described my. invention, what I vdesire to secure by Letters Patent is:

Y l. A reversing mechanism comprising a connecting element movable in opposite directions, a member operatively connected to said connecting element, and means for moving said member and saidL connecting element in one direction and then in the opposite direction, said means including a plurality of operatively connected rotatable members, means for rotating said rotatable members in opposite directions, a plurality of rotatable supporting means for ysupporting said rotatable members for free rotation with respect thereto, keying means carried by each of said supporting means and havinga nger extending therefrom and stop means cooperating with said ngers for actuating said keying means and reversing the direction of motion of said connecting element.

I2. A reversing mechanism comprising a connecting element movable in `opposite directions, a plurality of driven members operatively connected to said connecting element, and means for moving said driven members and saidiconnecting element in onedirection and then in the opposite l operatively connected rotatable members,.means for rotating said rotatable members in opposite directions, a plurality of rotatable supporting means for supporting said rotatable members for free rotation with respect thereto, keying means `carried by each of said supporting means and having a finger extending therefrom and stop means cooperating with said fingers for actuating said keyingmeans and reversing the direction of motion of said connecting element.

3. A reversing mechanism comprising a plurality of connecting elements movable in opposite directions with respect to each other, a plurality of driven members operatively connected to said connecting elements, and means for moving said driven members and said connecting elements in one direction and then in the opposite direction, said means including a plurality of voperatively bers, means for rotating said rotatable members in opposite direction, a plurality oi rotatable supporting means ior supporting said rotatable members for free rotation with respect thereto, keying means carried by each of `said supporting means e and having a linger extending therefrom and stop means cooperating with said iingers for actuating said keying means and reversing the direction of motion of said connecting elements.

4. A reversing mechanism comprising a pluz rality of connecting means movable in opposite directions With respect to each other, a plurality of driven members operatively connected to said connecting elements, and'means for moving sad driven members and said connecting elements in one direction and then in the opposite direction, said means including a plurality of operatively connected rotatable members, means for rotating said rotatable members in opposite directions, a plurality of rotatable supporting means for supporting said rotatable members for free rotation with respect thereto, keying means carried by each of said supporting means and having a finger extending therefrom and stop means coopconnected rotatable memy erating with said fingers for actuating said keying means and reversing the direction of motion of Y said connecting elements, said supporting means carrying said driven membersfor rotation therewith. i

5. A reversing mechanismcomprising a plurality of connecting elements movable in opposite directions with respect to each other, a plurality of driven members operatively connected tosaid connecting elements, and means for moving said driven members and said connecting elements in one direction and then in the opposite direction, said means including a plurality of operatively connected rotatable members, means for rotating said members in opposite directions, a plurality oi rota-table supporting means, having a cut-out portion therein, for supporting said rotatable members for free rotation with respect thereto, keying means carried in the cut-out portion of each of said supporting means for alternatively keying said supporting means to said rotatable member carried thereby, said keying means having lingers extending therefrom, and stop means cooperating with said ngers for actuating said keying means and reversing the direction of motion of said connecting elements.

ARTHUR MEDER.

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

UNITED STATES PATENTS Certieate of Correction Patent No. 2,525,929 October 17 1950 ARTHUR MEDER It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as :follows:

Column 5, line 22, for the Word direction read directions; line 31, for means read elements;

and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 19th day of December, A. D. 1950.

[SEAL] THOMAS F. MURPHY,

Assistant Commissioner of Patents.

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