US2432046A

US2432046A - Yarn-advancing reel

Info

Publication number: US2432046A
Application number: US656625A
Authority: US
Inventors: Robert H Stafford
Original assignee: EI Du Pont de Nemours and Co
Current assignee: EIDP Inc
Priority date: 1946-03-23
Filing date: 1946-03-23
Publication date: 1947-12-02
Anticipated expiration: 1964-12-02

Description

YARN-ADVANCING REEL Filed March 25, 1946 2 Sheets-Sheet 1 I 1N ToR. 05E/9TH. Aff-ono ATTORNEX Dec. 123947. Y R. H. STAFFORD 2,432,046

YARN-ADVANCING REEL Filed March 25, 194e 2 sheets-sheet 2 1N VEN TOR.

f4 TTORNEK tion to successive bars and blades.

Patented Dec. 2,

, YARN-Ammonia REEL Robert H. Stafford, Richmond, Va., assignor to E..I. du Pont de Nemours & Company, Wilminxton, Del., a corporation of Delaware Application March 23, 1946, Serial No. 656,625

- parent hereinafter.

The objects of this invention are accomplished, in general, by helically winding a yarn around a reel having a set of fixed yarn-carrying bars concentrically mounted about and rotatable with the central reel spindle and a set of yarn-carrying blades disposed alternately between the fixed bars and carried by discs which are so mounted 'in the reel that, upon rotation thereof about the reel spindle, the discs will'revolve in a perpendicular plane that is skewed with respect to a plane perpendicular ta the axis of the spindle.

' The yarn-carrying blades are supported in slots of two parallel discs by a ball-and-socket support so that, as the reel revolves, the blades will continually'change their angular position with respect to the slotted discs.

The slotted discs are mounted on and rotat about a stationary eccentric sleeve,`the bearing surfaces of which are eccentric with respect to the axis of the spindle and so skewed as to cause the discs to revolve in a vertical plane that is skewed with respect to a plane perpendicular to the axis of the spindle. Due to the construction and arrangement of the parts of the reel,

upon rotation of the spindle a fixed bar at one point on the circumference of the reel contacts a blade and causes the slotted discs to rotate.

This point of driving Contact between a fixed bar and a blade occurs only at one position ony the periphery of the reel and shifts during rota- During onehalf of a revolution, the blades project beyond the xed bars into yarn-carrying position and move laterally in the direction of feed of the yarn to advance the yarn across the reel.' During the.

remaining one-half of the revolution, the blades are in a retracted position below the fixed bars and move laterally in-fthe"d1rection opposite to that of the yarn travel for a distance equal to that traveled by the blades in yarn-advancing v position. rWhen the reel is viewed from lan end thereof, it will be observed that the blades travel in an elliptical path. l

The presentv invention will be more clearly understood by reference to the following detailed description when taken in connection with the iccompanyng drawings, in which:

of the reel of the pres- Iure 1;

Figure 3 is a section taken on line 3-3 of Figure 1; and

Figure 4 is a section taken on line 4-4 of Figure 3.

Referring now to the,y drawings wherein like reference numerals designate like parts, the refer- `ence numeral I0 designates' each of a plurality of longitudinally extending spaced bars arranged in the form of a cylinder. One end of each bar I0 is secured to a circumferential ange I2 and the other end is secured to the inner face of a solid head I4. The solid head I4 has an inwardly extending elongated hub I6 which screws on, as indicated by the reference numera1 I8, to one end of a horizontal spindle 20, which is driven Ain any suitable manner by means not shown.

The bars Ill, together with the circumferential flange I2 and the solid head I4, constitute a rigid cylindrical cage assembly in which the bars are fixed and disposed concentrically about the spindle 20. Upon rotation of the spindle 20, the rigid cage will be rotated and the xed bars I0 will revolve therewith in a xed' circular path about th axis of the spindle 20.

The ange I2 imparts rigidity'to the cage and especially to the fixed bars I0. It also prevents the yarn from getting back of the reel during the threading'operation.

each bearing surface 24. The discs 30 are in spaced and paralle1 relationship with respect to each other. Each of the discs 30 is provided with slots 3'6, and the discs 30 are so positioned on the sleeve 22 that the slots in one disc areA aligned with corresponding slots in the other disc. In each pair of aligned slots, there is positioned a yarn-carrying blade 40 which is supported by a ball-and-socket arrangement, as will now be described. Each blade 40 is provided with a pair of holes in which a cylindrical ball 42 is positioned. The diameter of the balls 42 is greater than the thickness of the blades 40, with the result that spherical surfaces of the balls 42 project'beyond'the side surfaces of the blades 40. These projecting spherical portions are\positioned in spherical counter-bores which act as sockets for the projecting spherical-surfaces and which are formed in the sides of the slots on the center line of the discs. The sides of the slots 34 in the discs Il are beveled in such a manner as to allow the blades to swing in perpendicular planes about the center of the spherical counter-bores.

Upon rotation of the reel, as will be hereafter more fully described, the blades 4l continually change their angular position with respect to the slotted discs 30 since the bearing surfaces 24 of the sleeve 22 are eccentric with respect to the axis of the spindle 20, and, since the sleeve 22 is skewed withrespect to the axis of the spindle, upon rotation of the discs 2l they will revolve in a vertical plane that is skewed with respect to a .plane perpendicular to the axis of the spindle. A

shoulder 44 and a thrust collar 46 threadedly disposed on the sleeve 22 maintain proper spacing between the discs 2l. The sleeve 22 is maintained stationary and kept from rotating by tongs 4l which engage grooves in a mating part of the support, generally designated by the reference numeral il, which carries the reel. The slotted discs 30, together with the blades 40 carried thereby and the sleeve 22, constitute a non-- rigid reel assembly.

From the, foregoing description, it is apparent that as the slotted discs are revolved on the eccentric sleeve 22, the blades 40 remain parallel but vary their distance from the center line of the spindle 2l, and they also oscillate longitudinally with respect to the bars I0. The eccentric bearings 24 are of such design that, during onehalf of a revolution of the reel, a yarn will be carried and advanced by the blades 40 which project beyond the fixed bars I and move laterally in the direction of the yarn feed. During the remaining half of the revolution, the blades 40 are below the fixed bars I0, whereby the 4yarn is carried by such xed bars and the blades are moved -lateral1y, in the direction opposite to the direction of yarn travel on the reel, for a distance equal to that which it (the blade) moved during the yarn-advancing operation.

The non-rigid assembly is driven by the rigid assembly. Due to the construction and arrangement of the parts of the reel, upon rotation of the spindle the fixed bars i0 will be revolved in a. circular path about the center axis of the spindle 20. During such operation, at one point on is not restricted thereto. By appropriate design of the eccentric bearings 24, the movable blades 40 can be made to carry and advance the yarn for more or less than 180 of the revolution of the reel and the fixed bars carry the yarn for the remainder of the revolution of the yarn. Further, by appropriate design of the eccentric bearings 24, the fixed blades Il and the movable blades 4l can be madeto alternately carry the yarn a plurality of times during a single revolution of the reel. In the latter embodiment, the portions of the revolution of the reel wherein the movable bars carry the yarn can be equivalent to or greater or less than those wherein the iixed bars carry the yarn.

The reel can be used for continuously advancing yarn in the general form of a helix. The yarn can be processed as desired while on the reel. Thus, for example, vif the yarn is made by the viscose process, the support Il may constitute a part of the frame ofthe spinningmachine and the yarn may be washed, desulfured, bleached or dried during its passage across the reel. If desired, the yarn can be'stretched while still wet with coagulating bath liquor or under the iniluencelof hot water by making the blades 4l progressively deeper toward the yarn wind-oil' end and making the helices larger at that end. Alternatively, the blades 40 may be made progressively smaller toward the yarn wind-off end to allow for shrinkage during appropriate treatments. such as desulfuring or drying.

Though the invention has been specifically described in connection-with a reel of the cantilever type, it is to be understood that the invention is not restricted thereto. The invention can be applied to reels that are supported at both ends.

Since it is obvious that many changes and modifications can be made in the above-described details without departing fromvthe nature and spirit of the invention, it is to be understood that the invention is not to be limited thereto except as set .forth in the appended claims.

I claim:

1. In a. yarn-advancing reel, a rotatable spindle, a set of spaced fixed yam-contacting bars arranged concentrcally about and rotatable with the circumference a fixed bar I0 contacts a blade 4l, causing the discs 30 to rotate on the sleeve 22. This point of driving contact between a fixed bar I 0 and a blade 40 occurs at one position on the periphery of the reel and shifts during rotation to successive bars and blades.

The increment of the yarn advancement over the reel or the magnitude of the pitch of the advancing yarn is determined by the degree to which the discs 30 are skewed.

The balls 42 can be either separate or integral parts of the respective blades 40.

In assembling the reel after the non-rigid reel assembly has been assembled, itis inserted in the -rigid cage by sliding the sleeve 22 over the elongated hub I6. Thereafter, the hub I6 is slid on the spindle 20 and rotated by handuntil the spinbars Il, it is to be understood that the invention said spindle, a set of yarn-contacting blades disposed alternately between said fixed bars, a stationary eccentric sleeve disposed/ on said spindle in a skewed position with respect'to the axis of said spindle, a pair of slotted parallel spaced discs rotatably mounted on said sleeve with the slots of one disc in alignment with the corresponding slots in the-'other dise, and means mounting a blade in each respective pairl of aligned slots to permit said blades to continually change their angular position, during revolving of the reel, with respect to the slotted discs, the means for mounting each of said blades comprising a pair of spherical balls carried by each blade, the spherical surfaces of said balls projecting from the sides of said blade being positioned in complementary shaped sockets formed in the sides of said slot.

2. In a yam-advancing reel, a rotatable spindle, a set of spaced fixed yam-contacting bars arran-ed concentrically about and rotatable with said spindle, a set of yarn-contacting bladesdisposed alternately between said fixed bars, a stationary eccentric sleeve disposed on said= spindle ina skewed position withrespect to the axis of said spindle, a pair oi' slotted parallel spaced discs rotatably mounted on said sleeve with the slots of one disc in alignment with the correprising a pair of spherical balls positioned in holes in said blade with the spherical'surfaces of said balls projecting from the sides of said blade, the spherical projecting surfaces of each ball being positioned in complementary shaped sockets in the sides of the slot.

3. In a yarn-advancing reel, a rigid cylindrical 4 casing having a plurality of spaced fixed yarncontacting bars extending longitudinally about the periphery and concentrically arranged about an inwardly extending hub, a rotating spindle disposed in and secured to said hub. an eccentric sleeve mounted on said hub in a skewed position with respect to the axis of said spindle, a pair of spaced slotted discs rotatably mounted on said sleeve with the slots of one disc being in alignment with the corresponding slots in the other disc, and means mounting a yarn-contacting blade in each respective pair of alignedslots to permit said blades. to continually change their angular position during revolving of the reel with respect to the slotted discs, the means for mounting each oi said blades comprising balls carried by each of said blades with the spherical surfaces of said balls projecting from the sides of eachA blade positioned in complementary shaped sockets formed in the sides of said slots.

4. In a yarnfadvancing reel, a solid head, an elongated hub extending inwardly from said head, a plurality of xed yarn-contacting bars arranged in spaced relationship about the periphery of said head and concentrically about said hub, a rotating spindle disposed in and secured to said hub, an eccentric sleeve mounted on said hub in a. skewed position with respect to the axis of said spindle, a pair of spaced slotted discs rotatably mounted on said sleeve with the slots of one disc beingl in alignment with the corresponding slots in the other disc, and means mounting a yarn-contacting blade in each respective pair of aligned slots to permit said blades to continually change their angular position during revolving of the reel with respect to the slotted discs, the means for mounting each of said blades comprising balls carried by eachl of said blades with the spherical surfaces of said balls projecting from the sides of each blade positioned in complementary shaped sockets formed in the sides of said slots. 4

ROBERT H. STAFFORD.

REFERENCES CITED The followingvreferences are of record in the le of this patent:

UNITED STATES PATENTS