US806748A - Winding apparatus. - Google Patents

Description

PATENTED DEC. 5, 1905.

S. T. NELSON.

WINDING APPARATUS.

APPLICATION FILED NOV. 25,1904.

A b n M 3 F DU wi/ine'sse:

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed November 25, 1904. Serial No. 234,153.

concerned with winding-drums intended for or apt to be employed in overwindingthat is to say, the winding of more than a single layer upon the drum-face.

The ordinary winding-drum has a cylindrical face and carries at its end a radial flange.

In winding on the successive convolutions of the rope the oncoming strand of course approaches the flange in a spiral path. If the winding be continued for overwinding or to produce a second layer, the oncoming strand wedges and jams into the gradually-narrowing space between the flange and the last convolution until the space becomes so narrow that the rope is actually jammed into position upon the top of the preceding convolution and into place for winding the second layer. This wedging and jamming action on the oncoming strand will always occur at substantially the same point and being highly injurious and detrimental to the rope materially shortens and practically determines its life. Overwinding is of particular importance in connection with minehoists where great lengths of wire ropes or cables must be taken in and paid out by suitable'hoisting machinery. For winding these excessively long cables eitheroverwindingmustbeemployedordrums of greatly-increased diameter and face installed for single winding, the latter course requiring not only increased outlay for the drums, but for the hoisting apparatus itself. So aggravated, however, has been the wear and tear from the foregoing cause upon the expensive wire cables which are used in this class .of work that in many instances overwinding has been discarded and larger drums and more expensive apparatus have been emoloyed, requiring an additional outlay, in some instances of from forty to fifty percent. of the cost of the overwinding plant.

My invention provides a simple and elfectivc means for avoidingthat injury to the rope or cable which has heretofore been inseparable from overwinding.

My invention will be best understood from the following description, when taken in connection with the accompanying drawings, of one specific embodiment, which is submitted for illustrative purposes, while its scope will be more particularly-pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of one form of rope guiding or step-over de vice which may be employed in carrying out my invention. Fig. 2 is an elevation of the same looking from the right in Fig. 1. Fig. 3 shows, on a reduced scale, a portion of a rope-windingdrum, illustrating the use of the step-over guidingdevice shown in Figs. 1 and 2. Figs. 4, 5, and 6 are sections, on a greatlyenlarged scale, taken on the lines 4 at, 5 5, and 6 6 in Fig. 3 and illustrating the mode of action of the step-over device shown in Figs. 1 and 2.

In the drawings the drum a, provided with a flange b, is shown as illustrative of any ordinary or usual winding-drum. It is shown herein as spirally grooved to receive the spiral convolutions of the first layer of rope 1*; but my invention is in no wise limited to grooved drums or to drums of any particular type or character. Secured to the drumflange b or, if desired, formed integral therewith, is asegmental step-over piece 0, which presents to the oncoming rope-strand r be fore it has opportunity to become wedged between the drum-flange and the preceding rope coil r a well-defined path and guides the oncoming strand in a perfectly free and natural way upward above and over the preceding coil, so that the rope is deposited without any injurious chafing or jamming upon top of the preceding layer, as shown in Fig. 6, ready for the winding of the next layer. The step-over piece has a grooved flange d to provide a suitable guiding-path for the rope, the groove thereof having a spiral path reverse to that of the layer of rope just wound and adapted, therefore, to carry the rope farther and farther away from the drum-flange and toward the preceding rope coil as it winds upon the groove. The latter, however, is of increasing radius, so that at the same time it lifts the rope from the drum-surface and elevates or steps it up first to the position shown in Fig. 4, then gradually to that shown in Fig. 5, where it rests partly on the flange and partly on the last rope coil. After reaching the position shown in Fig. 5 the oncoming f'e'levated rope strand meets the face of the inclined directing-wall e and is thereby gradually, but easily and without chafing or friction, directed or guided from the position shown in Fig. 5 to that shown in Fig. 6. where it is shown lying on top of the'l'ast preceding rope convolution. The oncoming rope is thus positively guided or lifted away from the drum-face and away from the place where it would otherwise jam and wedge between the drum-flange and the preceding coil.

The step-over piece 0 preferably has a slight taper to follow the cut of the drum-grooves, it being so dimensioned that it will clear the side of the preceding rope-coil, as shown in Figs. 4 to 6, but arranged to present its grooved or other directing path to the oncoming strand before the latter reaches the wedging position.

I have herein described for illustrative purposes one single embodiment of my invention simple in construction and which I have found practicallyeffective. Myinvention, however, may he carried out in many other ways than that herein described, many of which will be obvious to those skilled in the art and which are not herein necessary to describe. It will therefore be obvious that my invention is in no wise limited to the particular illustrative embodiment herein disclosed, but is limited only by the broad principle thereof herein described.

I claim 1. In a rope-winding apparatus the combination with a rope-winding drum of means positively to elevate an oncoming strand away from'the face of the rope-drum and over the preceding rope-coil.

2. In a rope-winding apparatus the combination with a rope-winding drum'of overwinding, rope-step-over means.

3. In a rope-winding apparatus the combination with a rope-winding drum of grooved guiding means for guiding the oncoming ropestrand over and above the preceding rope layer.

t. In a rope-winding apparatus the combination with a rope-drum of guiding means presenting a spiral directing-path of increasing radius for causing the oncoming ropestrand to move over and above the preceding rope layer.

5. In a rope-winding apparatus the combination with a rope-winding drum for winding rope from one end thereof toward the other of rope-guiding means presenting to an oncoming strand a grooved path of increasing radius and leading toward the initial drum end.

6. In a rope-winding apparatus the combination with a flanged rope-winding drum of means secured to the flange thereof for elevating the oncoming rope-strand away from the drum-face and guiding it away from the inner face of said flange.

7. A rope-guiding device for overwinding comprising a grooved segmental flange of increasing radius and an inclined directing-wall adjacent thereto.

8. In a rope-winding apparatus the combination with a spirallygrooved drum of a grooved rope-path of increasing radius near one end thereof and reversely spiraled.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SVEN T. NELSON.

\Vitness'es:

DUDLEY TAYLOR, MELVILLE OLIPHANT.

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