US3474614A

US3474614A - Flyer for spinning yarn

Info

Publication number: US3474614A
Application number: US729246A
Authority: US
Inventors: Kurt Gallina
Original assignee: C Eugen Maier Metallverarbeitung GmbH
Current assignee: C Eugen Maier Metallverarbeitung GmbH
Priority date: 1967-07-29
Filing date: 1968-05-15
Publication date: 1969-10-28
Anticipated expiration: 1986-10-28
Also published as: GB1205084A; JPS507655B1; CH511954A; FR1580486A; DE1685910B1

Description

oef. 28,- 1969 K. GALLINA FLYER AFon SPINNING YARN 2 Sheets-Sheet 1 Filed lay I15. 1968 INVENTOR KURT GALL/Nn.

ATTORNEYS Oct. 28, 1969 K. GALLINA FLYER FOR SPINNING YARN 2 Sheets-Sheet 2 Filed lay 15. 1968 INVENTCR KURT @AU-NH ATTORNEYS United States Patent C U.S. Cl. 57-117 10 Claims ABSTRACT OF THE DISCLOSURE A flyer for use in spinning yarn is formed of a U-shaped member having a hollow arm constructed of an inner steel tube enclosed in an outer cast aluminum sleeve. A presser finger is mounted on the hollow arm by means of retaining rings. A reinforcing sleeve is positioned on the free end of the tube, which extends beyond the end of the sleeve. One of the presser finger retaining rings is attached to the reinforcing sleeve and it provides an inwardly directed annular protuberance at the outlet end of the hollow arm for avoiding wear on the free end of the tube.

SUMMARY OF THE INVENTION The invention is directed to a flyer for use in spinning yarn and the like and, more particularly, it is concerned with the construction of the hollow arm in the yer.

In various textile applications the flyers used for spinning yarn have usually been made of steel. Recently, in order to reduce the weight of these devices, they have been formed of cast aluminum. The use of cast aluminum flyers also effects a reduction in cost of such devices. However, there are certain disadvantages in the use of cast aluminum flyers which are overcome by the present invention. A particular disadvantage of such flyers is their low strength and hardness. Moreover, on such flyers the spring or presser finger secured to them break olf easily or otherwise interfere with proper operation of the flyer. Moreover, the casting of hollow arms with slits presents difficulties and as a result, the hollow arms are cast as tubes and then must be slit. However, to avoid damage to the roving and to prevent the formation of fibers as the roving passes downwardly through the hollow arm, the saw edges of the slit have to be rounded off in what is a relatively expensive operation. Finally, loose fibers caused by centrifugal forces in aluminum flyers with lateral arrangement of the slit increases undesirable fiber fly and can lead to breaks in the yarn.

It is the primary object of the present invention to provide an improvement over the prior flyer constructions by employing an inner tubular part for the hollow arm formed of steel with a surrounding or enclosing sleeve portion formed of cast aluminum. By using a tubular steel section in the hollow arm relatively high strengths are attained, and by incorporating the steel section in a sleeve formed of aluminum or some other similar light metal the arm is also light in weight. In addition, to avoiding the disadvantages described above, the combined steel and aluminum member has a greater resistance to wear than one formed only of aluminum.

The present invention also includes the use of a plastic material having aluminum-like properties for the sleeve surrounding the tubular steel section. Moreover, stainless steel can be used in place of regular steel.

In a preferred embodiment of the invention, the inner tubular part extends centrally of the hollow arm from its free end to the cross member section of the U-shaped flyer. Within the cross member, the tubular part is disposed obliquely to the axis thereof and it has an inlet Patented Oct. 28, 1969 opening or bore in the cross piece spaced laterally from the axis of rotation of the flyer. This arrangement affords better accessibility, especially to the inlet opening located at the so-called head of the flyer. This disposition of the tubular part is of importance during the introduction of the roving into the flyer and also during the polishing of its inner surfaces.

Another feature of the present invention is the disposition of the inner tubular part extending outwardly beyond its enclosing sleeve at the free end or presser finger end of the flyer. In this arrangement, a hard material which can withstand higher stresses is available for supporting the presser linger at the free end of the hollow arm. Preferably, a reinforcing sleeve is mounted on the protruding end of the inner tubular part and is seured to it by soldering. With this arrangement, the support for the presser finger has a greater rigidity.

It is advisable to form the presser finger of a round steel shaft with a molded-on tip or palm at its end. The wire-shaped starting material for the presser finger is relatively inexpensive and requires practically no special Working. The tip of the presser finger can be easily molded on and has a relatively high resistance to abrasion.

Another feature of the invention is the utilization of a pair of spaced retaining and guide rings for mounting the presser finger on the hollow arm. By employing closed rings, the usual formation of ily observed Where longitudinally slit bearings are used is prevented. Moreover, with the use of guide rings the presser finger can be easily mounted on the protruding free end of the inner tubular part.

A further feature of the invention is the provision of a guide groove in the reinforcing sleeve on the end of the tubular part which is arranged to receive a slider attached to the presser linger. The arrangement of the groove affords exact positioning of the presser finger with respect to the free end of the hollow arm. For reasons of assembly and cost the slider is arranged as a screw member within the presser finger and provides a pinshaped end disposed within the groove arranged transversely of the longitudinal axis of the hollow arm. Another characteristic of the slider arrangement is the provision of a pair of angular spaced cross pins within the guide groove in the reinforcing sleeve, these cross pins limit the pivotal movement of the presser linger with respect to the hollow arm, and as a result, limit the presser finger to a predetermined angle of rotation.

At the free end of the hollow arm the guide ring for the pressure linger has an inwardly directed annularshaped protuberance located outwardly from the end of the inner tubular part. The diameter of this protuberance is the same or Islightly less than the inside diameter of the inner tubular part. Accordingly, the roving, as it passes outwardly from the hollow arm, contacts the protuberance and as wear develops on the protuberance, it is relatively easy to replace the guide ring as compared to replacing the outlet end of the inner tubular part. To permit a certain amount of wear in the inwardly extending protuberance, preferably it is provided with a diameter slightly smaller than the inside diameter of the inner tubular part. To afford a gentle directional transition for the roving as it issues from the hollow arm the inner bore or opening of the guide ring having the inwardly directed protuberance diverges outwardly in a funnel-like shape providing a rounded surface at the outlet end of the hollow arm.

In order to limit any resistance to the passage of the roving through the inner tubular part its interior surface is polished which also assists in avoiding the formation of fiy in the hollow arm. Within the flyer the tubular steel part has a bent form and it is polished before it is posi- 3 tioned in the flyer. After it is located within the flyer it can be repolished easily due to its construction.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specication. For a better understanding of the invention, its operating advantages and specic objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated and described a preferred embodiment of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. l is a vertical front View of a flyer embodying the present invention;

FIG. 2 is a side view of the flyer shown in FIG. l;

FIG. 3 is a top view of the flyer shown in FIG. l;

FIG. 4 is a cross sectional view taken along line IV-IV of FIG. 1;

FIG. 5 is an enlarged sectional detail view of the portion of the flyer encircled in FIG. 1;

FIG. 6 is a tranverse sectional view taken along the line VI-VI in FIG. 5; and

FIG. 7 is a partial sectional view taken along the line VII-VII in FIG. 6.

DETAILED DESCRIPTION OF THE INVENTION In FIG. l, a flye'r 1 of the type used in spinning yarn and the like is formed of a U-shaped member having a hollow arm 2 and a solid counterweight arm 3. A head 4 is provided in the transverse portion of the U-shaped member providing an axis of rotation about which the flyer rotates. In use the U-shaped member is mounted, by means of its head 4, on a spindle top and revolves with it. A steel tube S is positioned within an enclosing sleeve 6 to form the hollow arm. The hollow arm 2 has a circular cross section as shown by the arrangement of its free end in FIGS. 5 and 6, while the counterweight arm 3 has a streamlined generally oval cross section, note FIG. 4. It would also be possible to use round hollow sections for both arms of the U-shaped member.

The enclosing sleeve portion 6 of the hollow arm 2 as well as the counterweight arm 3 are formed of cast aluminum. At its lower or free end, the inner tubular part 5 projects beyond the end of the sleeve 6 providing it with an outlet end 7. Disposed at the outlet end 7 is a reinforcing sleeve 8 provided with a transversely arranged guide groove 9. The outlet end 7 of the inner tubular part 5 and the reinforcing sleeve 8 are soldered together as at 10.

Extending into the groove 9 is one end of a screw 12 which is used as a slide member for fixing the vertical position of a presser iinger 13 mounted on the exterior of the hollow arm. The slider 11 is arranged to afford a pivotal movement for the presser finger corresponding to the angle 15, see FIG. 6, limited by a pair of cross pins 14 arranged as stops within the groove 9 and extending parallel with the longitudinal axis of the hollow arm 2, note FIGS. 6 and 7. The upright portion 16 of the presser linger 13 extends along the hollow arm and has an upper and a lower retaining and

guide ring

17 and 18 for securing the presser iinger to the hollow arm. The retaining and guide rings 17 and 18 are welded to the presser finger which is formed of a round steel wire. At its lower end below the ring 18v the presser finger is provided with an angled turn 19, bent transversely of the longitudinal axis of the hollow arm and disposed laterally from the opening or bore 20 in the hollow arm to prevent any obstruction to passage from the opening. Due to the arrangement of the

rings

17 and 18, the presser tinger 13 can be positioned on the hollow arm very quickly and easily. In mounting the presser finger it is pushed upwardly over the hollow arm in the direction of the arrow 21, see FIG. 2,k and is fixed vertically and transversely within a given range by threading the self-locking screw 12 into the presser mem- 4 ber, see FIG. 5. Both the screw 12 and the reinforcing sleeve 8 are tempered to provide a high resistance to wear.

Since

closed rings

17 and 18 are employed in securing the presser finger on the hollow arm the formation of fly is prevented. Moreover, this arrangement provides, for the rst time, a satisfactory solution to the problem of mounting the presser linger on a hollow aluminum arm. At the lower end of the hollow arm the retaining and guide ring 18 has an inwardly projecting protuberance 22 whose inside diameter 23 is slightly less than the inside diameter 24 of the inner tubular part 5, this diameter would preferably be about 7 to 8 mm. In this arrangement, with the protuberance 22 projecting inwardly below the opening from the inner tubular part 5 the roving issuing downwardly through the hollow arm will wear against the protuberance instead of against the free end of the inner tubular part. As shown in FIG. 5, the reduced diameter portion of the opening in the ring 18 is located at its p0rtion closest to the outlet from the tube and as the ou'ftlet from the ring extends toward its outer edge or face 25 it has a curvilinear diverging configuration providing a rounded outlet surface shaped generally like a funnel to avoid any damage to the roving as it issues from the hollow arm and to prevent the formation of fly at that point.

As shown in FIGS. l and 3, the bore or opening provided by the inner tubular part 5 extends centrally through the vertically arranged portion 26 of the U-shaped member, and then within the transverse or cross portion 27 of the member the bore is dispose-d obliquely to the axis of its surrounding sleeve 6. At its upper end the bore has an opening 28, see FIG. 3, disposed laterally of the head 29 and, accordingly, is spaced eccentrically to the axis of rotation of the ilyer. With this arrangement the repolishing of the inner wall 30 of the tubular part 5 and the introduction of the roving into its bore are made relatively simple. Due to the inclination of the inner tubular part in the cross portion 27 of the member and the resulting centrifugal forces developed in rotation air cannot ow out through the top of the bore but, instead, passes off through the vertically extending section of the hollow arm to its outlet end. All loose fibers are carried along by and are bonded to the downwardly moving roving withing within the inner tubular part. As a result, practically no iber y issues from the hollow arm. The exterior surface of the flyer is relatively smooth and the attachment of noses, cams, and the like can be dispensed with.

While a specic embodiment of the invention has been shown and described in detail to illustrate the application of the invention principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

What is claimed is:

1. A yer for use in spinning yarn and the like corn- -prises a U-shaped member having at least one hollow arm, said hollow arm comprising an inner tubular part and an outer sleeve part enclosing the inner tubular part, said outer sleeve part formed of a diierent material than said inner tubular part, said U-shaped member comprises a bearing member having an axis of rotation arranged to rotatably mount said U-shaped member, said hollow arm being secured to and initially extending angularly from said bearing member forming a generally transverse p0rtion relative to said bearing member and then a longitudinal portion disposed angularly to said transverse portion and extending longitudinally therefrom in generally parallel relationship with the axis of rotation of said bearing member, said inner tubular part extending through said hollow arm and having an inlet end located in said transverse portion adjacent said bearing member and an outlet end at the opposite end of the longitudinal portion of said hollow arm, said inner tubular part extending longitudinally beyond said outer sleeve part at its outlet end, and a reinforcing sleeve titted onto and secured to the outlet end of said inner tubular part outwardly from the adjacent end of said outer sleeve part.

2. A yer as set forth in claim 1, wherein said reinforcing sleeve is soldered to said inner tubular part.

3. A flyer, as set forth in claim 1, wherein a presser finger is secured to the outer surface of said hollow arm, said presser finger having a firstpart extending along the longitudinal portion of said hollow arm to a point closely beyond the outlet end thereof and a second part extending transversely to said hollow arm from the end of said first part located outwardly from the end of said hollow arm, said second part forming al tip portion spaced laterally from the outlet end of said hollow arm, and said second part being offset from the axis of the opening from said hollow arm.

4. A flyer as set forth in claim 3, wherein said presser -finger is formed of a round steel section and said tip portion is molded onto the encl thereof.

5. A flyer as set forth in claim A4, wherein a first ring and a second ring disposed in spaced relationship are attached to said presser finger, said first ring is fitted onto said hollow arm at the location of `said reinforcing sleeve on said tubular inner part and said second ring is spaced therefrom on the longitudinal portion of said hollow arm.

6. A flyer as set forth in claim 3, wherein said reinforcing sleeve has a groove formed therein extending transversely to the axis of the longitudinal portion of said hollow arm, and a slider member mounted in said presser finger and extending inwardly therefrom into said groove and being selectively positionable therein.

7. A flyer as set forth in claim 6, wherein said slider member is connected to said pressure member and has a pin-like end part disposed within and movably positionable through the groove in said reinforcing sleeve.

8. A flyer as set forth in claim 7, wherein a pair of spaced pins are disposed within said reinforcing sleeve extending in a general parallel relationship with the axis of the longitudinally extending portion of said hollow arm, said pins extending through the groove and forming limiting members for the movement of the pin-like end part of said slider within the groove.

'9. A flyer as set forth in claim 5, wherein said first retaining ring extends beyond the outlet end of the inner tubular part of said hollow arm, said rst retaining ring having an inwardly projecting protuberance formed in its inner surface aligned with said inner tubular part said annular protuberance having an inside diameter not greater than the inside diameter of said inner tubular part.

10. A flyer as set forth in claim 9, wherein the surface of said first ring disposed outwardly from said protuberan-ce at the outlet end of said hollow arm is in diverging relationship from the protuberance to the end face of said first ring.

References Cited UNITED STATES PATENTS 2,599,356 6/1952 Wild 57-115 3,117,409 l/l964 Shino 57-67 3,157,020 11/1964 Schwager 57-117 3,216,185 1l/1965 Gallina 57-117 3,318,079 5/1967 Costner 57-117 FOREIGN PATENTS 380,745 9/1932 `Great Britain.

MERVIN STEIN, Primary Examiner W. H. SCHROEDER, Assistant Examiner