US2440976A - Rayon spinning funnel bracket - Google Patents

Description

May 4,1948. w. N. ROSS 2,440,976

RAYON SPINNING FUNNEL BRACKET Filed Nov. 23, 1946 3 Sheets-Sheet 1 INVENTOR. WILBUR NORBERT ROSS ATTORNEY May 4, 1948.

W. N. ROSS RAYON SPINNIP IG FUNNEL BRACKET Filed Nov. 23, 1946 3 Sheets-Sheet 2 INVENTOR. WILBUR NORBERT ROSS ATTORNEY v 1948- w. N. ROSS 2,440,976

RAYON SPINNING FUNNEL BRACKET Filed Nov. 23, 1946 3 Sheets-Sheet 3 INVENTOR.

WIL BUR NORBERT ROSS ATTORNEY Patented May, 4; 1948 RAYON SPINNING FUNNEL BRACKET Wilbur N. Ross, 01d Hickory, Tenn, assignor to E. I. du Pont de Nemours & @ompany, Wiimington, Del, 21. corporation'ot Delaware Application November 23, 1946, Serial No. 711,943

2 Claims. 1

This invention relates to yarn-producing apparatus and more particularly it relates to a yam-guiding mechanism for guiding a freshly formed yarn into a centrifugal spinning bucket or the like. While the invention will ,be described with particular reference to the manufacture of regenerated cellulose rayon yarn, it is to be understood that the invention is applicable to all instances in which a guide is used for the transfer of a yarn to a revolving container wherein a spinning cake may be formed by the centrifugal pull created on the yarn by the rotational speedof the bucket.

In one method, freshly formed regenerated cellulose yarn is guided by a reciprocating mechanism into a bucket revolving at sufliciently high speed to create the necessary centrifugal force. The reciprocating mechanism traverses the yarn up and down along the wall of the bucket and this motion combined with the rotation of the bucket causes the yarn to be wound in superimposed helices with the formation of a hollow, even cake from which the thread can be readily unwound.

A funnel tube made of glass, hard rubber, metal or the like is generally employed as the guide in distance between the bottom of the bucket and the funnel tip as needed.

Ordinarily the funnel holder is connected to the traverse bar through pivotal funnel arms so that the funnel-guide may, after its removal from the bucket. be swung backwardly out of the way in its normal prescribed arc to permit the removal of the bucket from the :spindle. This step is usually done by hand, and because the space is restricted, breakage of the funnel-guide and damage to the bucket and the yarn frequently occurs. Furthermore it is desirable to keep the pot as completely closed as possible during spinning; the entrance holes for the funnel at the top of the bucket and in the compartment cover are kept small. The problem is further complicated by the fact that the industry is desirous of collecting large packages of yarn thereby reducing the number of knots in a given yardage. Therefore, buckets of large diameter and of greater than ordinary depth are required. For example,

it is desired to use buckets having a diameter of 8 inches and a depth of 7.5inches in a machine built for buckets only 7 inches across and 4 inches deep.

It is therefore an object of this invention to improve the mechanism for the manufacture of g yarns composed of artificial filaments.

Another object of this invention is the provision of an improved yarn-guide holder for the production of artificial yam.

Other objects of the invention will appear hereinafter.

The objects of this invention are accomplished by constructing a yarn-guide which is 'hingedly connected to a vertically reciprocating mechanism by two arms the lower of which is slotted at the w pivot point on the reciprocating mechanism,- the said pivot point consisting of a fixed flatted pivot stud. By this construction the yarn-guide may be raised through a restricted arc, retracted and locked in the retracted, raised position in one continuous movement whereby removal of the compartment cover, bucket and cake is facilitated.

The purpose and advantages of the invention will be apparent from the following detailed description when considered in connection with the 26 accompanying drawings in which:

Figure 1 shows the yarn-guide in spinning position,

Figure 2 shows the yarn-guide in the raised position, and

Figure 3 shows the yarn-guide locked into the raised, retracted position.

In the drawings similar character references refer to like parts.

Referring to Figure 1 of the drawings, refer- 85 ence character l designates the yarn-guide in the normal spinning position, the bucket and bucket cover being marked as 2 and 3, respectively. The openings in the compartment cover ta and the bucket, i and 5 respectively, are made small to to prevent contamination of the yarn, to prevent escape of toxic fumes into the spinning room and to prevent strong air currents from deleteriously affecting the lay of the yarn in the bucket cake.

The part 6 is'the entrance to the yarn-guide through which the yarn passes as the guide i reciprocates vertically and the bucket 2 revolves.

' The yarn (not shown) is deposited by centrifugal force against the side wall of the bucket 2 in the form of an annular cake.

The reciprocating bar responsible for the movement of the yarn-guide is designated by reference character I. The yarn-guide is connected to the reciprocating bar through the guide holder '3 and by four arms 9 and i0, pivot points being 55 marked as H, l2, l3 and it. At each pivot point is a nut under which is a resilient washer. The nuts and washers are adjusted so that friction sufficient to keep the parts in a set position during spinning can be easily maintained and so that at the same time only a slight eflort on the operators part need be exerted to alter the setting. The reciprocating bar I is driven by machinery not shown. As the bar moves up and down the yam-guide necessarily moves in a similar path. I

The lower arm in is constructed so that the round hole centered at pivot point II is joined to a slot l having a width 2. fraction greater than the width of the flatted stud ii. Upon completion of the spinning of a cake of yarn the guide i is raised and retracted to permit removal of the bucket 2. This raised position is shown in Figure 2. As the yam-guide is raised the slot in lower arm l0 becomes aligned with the flat sides of the fixed fiatted stud IS. The effective length or the lower arm Hi can then .be readily shortened by merely permitting the lower arm in to slide downward on the flatted stud i6. .IThe retracted, raised position so reached is shown in Figure 3. This position may be maintained indefinitely, as indicated in Figure 3.

The invention permits the spinning of yarns into large packages and in a more restricted space than hitherto possible on existing machines. It provides for the retraction of the yarn-guide in such a manner that it automatically locks in the raised, retracted position where it is out of the way and offers no interference to the domng of the bucket and its cake, and as a further result, there is a considerable diminution in the breakage of funnels. Also. from this locked position the guide may be readily removed for cleaning or replacement.

It is obvious that many changes and modifications may be made in the above detailed description without departing from the nature and spirit or the invention. Therefore, it is to be understood that the invention is not to be limited except as set forth in the appended claims.

I claim:

1. A support for a yam-guide traversing mechanism comprising a vertically reciprocating mechanism; a yarn-guide holder and a lifting bracket comprising an upper arm and a lower arm, said arms having a pivoted connection at one end to said yarn-guide holder and a pivoted connection at the other end to said vertically reciprocating mechanism, the pivoted connection of said lower arm to said vertically reciprocating mechanism comprising a slot in said lower arm and a flatted stud amxed to said vertically reciprocating mechanism so that upon alignment of said slot and said flatted stud said support may be locked into a raised, retracted position.

2. In combination with a yarn producing machine having a yarn guide traversing mechanism and a centrifugal spinning pot, a support for said yam-guide traversing mechanism comprising a vertically reciprocating mechanism; a yarnguide holder and a lifting bracket comprising an upper arm and a lower arm, said arms having a pivoted connection at one end to said yarn-guide holder and a pivoted connection at the other end to said vertically reciprocating mechanism, the pivoted connection of said lower arm to said vertically reciprocating mechanism comprising a slot in said lower arm and a flatted stud afilxed to said vertically reciprocating mechanism so that upon alignment of said slot and said fiatted stud said support may be locked into a raised, retracted position.

WILBUR N. ROSS.

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