US3343359A

US3343359A - Protective pot for multiple twist spindles

Info

Publication number: US3343359A
Application number: US612848A
Authority: US
Inventors: Franzen Gustav; Brisken Kurt; Lossa Ulrich
Original assignee: Palitex Project Co GmbH
Current assignee: Palitex Project Co GmbH
Priority date: 1966-02-07
Filing date: 1967-01-31
Publication date: 1967-09-26
Anticipated expiration: 1984-09-26
Also published as: FR1509462A; JPS5346936B1; DE1510866B1; ES336417A1; GB1144524A; CH446140A

Description

Sept. 26, 1967 G. FRANZEN ETAL 3,343,359

PROTECTIVE POT FOR MULTIPLE TWIST SPINDLES 4 Sheets-Sheet l Filed Jan.

FIG. 1

illiionnnnnnii 4.Sheets-Sheet 2 G. FRANZEN ETAL` mill-mmm Sept. 26, 1967,

PROTECTIVE POT FOR MULTIPLE TWIST SPIDLES Filed Jan; 51, 1967 Sept. 26, 1967 l I G. FRANZEN ETAI. 3,343,359

PROTECTIVEPT FOR MULTIPLE TWIST SPINDLES y Filed Jan. "51, 19e? 4 Sheets-Sheet 5 Sept. 26, 1967 FRANZEN ETAL PROTECTIVEv POT FOR MULTIPLE TWIST sPINDLEs Filed Jan. 3l, 1967 4 Sheets-Sheet 4.

United States Patent O 3,343,359 PROTECTIVE POT FOR MULTIPLE TWIST SPINDLES Gustav Franzen, Neersen, near Krefeld, Kurt Brisken,

Munchen-Gladbach, and Ulrich Lossa, Krefeld, Germany, assignors to Palitex Project-Company G.m.b.H., Krefeld, Germany Filed Jan. 31, 1967, Ser. No. 612,848

Claims priority, application Germany, Feb. 7, 1966,

9 Claims. (Cl. 57-58.76)

ABSTRACT OF THE DISCLOSURE The present invention relates to a protective pot for multiple twist spindles, especially two-for-one spindles, according to which the pot consists of a lower section and of at least one upper section detachably connected to the lower section While magnetic means are carried by one of said sections on the inside thereof at the area where the lower section joins the adjacent upper section.

The present invention relates to a protective pot for multiple twist spindles, especially two-forone spindles, according to which the said top is freely rotatably journalled on the spindle rotor, but is adapted by means of a pair of magnets to |be prevented from rotation. Of each of said pairs of magnets, one magnet is mounted on the mantle of the protective pot approximately within the area of the largest radial extension of the thread balloon.

With most of the heretofore known protective pots, the pot magnets are arranged directly at the bottom of the pot or in the immediate vicinity of the bottom. Such an arrangement has the drawback that the structural height of the spindle is greater by the height of the magnets in the pot bottom, than would be possible if the magnet bodies were not mounted in this area.

Other heretofore known protective pots, in an endeavor to avoid the above mentioned drawback have the magnets arranged at the upper marginal portion of the protective pot. If these pot ma-gnets in this instance are arranged on the outside of the pot, the balloon-shaped circulating thread will .at least during the starting phase hit against the said top pot magnets.

If the -pot magnets are arranged on the inside, they narrow down the free space within the pot, which fact impedes the insertion of the delivery bobbin or reduces the maximum possible diameter of the bobbin.

Other heretofore known suggestions have overcome these drawbacks by designing the protective pot mantle, not cylindrical, but in the shape of the thread balloon; in other words, with an outwardly arched portion, so that the magnets will find suicient space at approximately half the height of the pot within the Iarea of the maximum balloon extension, while the cylindrical inner space permits the insertion of a delivery bobbin without loss in volume.

This shape of the protective pot, and the provision of magnets in the interior thereof increases the cost of manufacture. While a cylindrical protective pot can be formed by a sheet metal cylinder to be connected with the bottom of the pot, a protective pot mantle which narrows at the upper marginal portion and is also narrowed at the bottom requires expensive shaping tools, for instance, complicated drawing tools when the pot in its entirety or only the protective pot mantle is produced by means of drawing tools or curving tools, or complicated casting tools are required when the pot is tobe cast.

In addition to the above mentioned technical manufacturing difficulties, there are also encountered further difficulties when inserting the magnets for which special pockets have to be molded in or which in case that such pockets are cemented in or soldered in requireed adjusting steps in order to assure the desired position of the magnets on the inner wall of the protective pot.

It is, therefore, an object of the present invention to provide a protective pot for multiple twist spindles, especially two-for-one twisting spindles of the above mentioned shape, which will manufacture thereof.

It is another object of this invention to provide a protective pot, as set forth in the preceding paragraph, which will facilitate the insertion of the magnets. 1

Still another object of this invention consists in the provision of a protective pot as set forth above, which will without difiiculties permit the exchange of parts of the pot for other parts in such a way that by exchanging parts, it will be possible to produce protective pots of different height which can also be equipped in a different way with magnets so that also bobbins of diiferent height can be employed.

These and other objects and advantages of the invention will appear more clearly from the following specification, in connection with the accompanying drawings, in which:

FIGURE l illustrates a spindle rotor supporting a protective pot according to the invention with a delivery bobbin therein. i

FIGURE 2 is a section along the line II-II of FIG. 1 with the delivery bobbin removed.

FIGURE 3 illustrates a spindle rotor supported modified protective pot according to the invention with a delivery bobbin therein.

FIGURE 4 is a section taken along the line IV-IV of FIG. 3 without a delivery bobbin.

FIGURE 5 shows a still further modification of a protective pot according to the invention with a delivery bobbin therein.

FIGURE 6 i-s still another modied protective pot according to the invention with a pot ring of two superimposed ring members.

FIGURE 7 is a perspective view of the lower ring member of the pot ring with inserted pot magnets.

The present invention is characterized primarily in that the protective pot is composed of a lower pot section and at least an upper pot ring detachably connected to said lower pot section while a separating gap is located within the r-ange of the pot magnets, i.e. approximately within the range of the largest radial extension of the pot which coincides approximately with the largest radial expansion of the thread balloon. Such an arrangement brings about that the protective pot can be designed of a lower pot section which widens toward the opening marginal portion so that the pot will have a shape which when being produced as a cast piece or as a drawn piece will encounter no particularly difliculties. The same applies to the pot ring and even to the employment of a plurality of pot rings which are superimposed on each other upon the pot section.

Inasmuch as the magnets are arranged within the area of the separating gap, the pot magnets can be inserted prior to the connection of pot section and pot ring. The location of the pot magnets can be unequivocally ascertained in advance by correspondingly shaping and designing the pot section and pot ring within the range of the separating gap. Moreover the insertion of the pot magnets is facilitated in view of the fact that they can be inserted axially.

Referring now to the -drawings in detail, the arrangement shown therein comprises a spindle rotor 1, having freely rotatably joumalled therein the carrier 2 for the delivery bobbin, said carrier forming a functional unit with the protective pot generally designated 3. Outside permita particularly simple pot 3, as shown in FIGS. 1 to 4, there are arranged two or more magnets 4, which by means of other parts are supported by the balloon confining means (not shown), separators (not shown), or other non-illustrated machine frame portions.

The protective pot 3 according to FIGS. 1 and 2, comprises a pot member generally designated 5 composed of the pot 'bottom 5a and the bottom ring 5b. Pot member 5 widens in upward direction and has at its upper marginal portion an inwardly directed annular constriction 6 in which are mounted the pot magnets 7. The pot ring 8 is placed from above upon the pot member 5 so as to pass over the constriction 6 and the pot magnets 7. The said pot ring 8 rests on the edge 9 of the annular constriction 6. Pot ring 8 tapers in upward direction in such a way that the diameter of the upper edge approximately equals the diameter of the pot bottom 5a. The said constriction 6 is so selected that it will not extend inwardly into a cylinder mantle the diameter of which is determined by the free diameter of the free diameter of the upper edge of the protective pot so that the insertion of a delivery bobbin 10 with a maximum diameter will be possible.

As will be clearly evident from FIG. 1 the separating gap between the lower pot member 5 and the upper pot ring 8 is located directly below the pot magnets 7, i.e. approximately within the area of the maximum radial extension of the thread balloon or within the range of the maximum radial extension of the protective pot.

The embodiment according to FIGS. 3 and 4 differs from that of FIGS. 1 and 2 primarily in that the lower edge of the pot ring 8a has an inwardly directed annular constriction 6a, in which are mounted the pot magnets 7, and furthermore differs from FIGS. 1 and 2 in that the pot ring 8a is placed upon the pot member 5 which with this embodiment forms a single piece. The upper edge of pot member 5 extends from the outside over the constriction 6a and thus encloses the pot magnets 7. In this instance, the pot ring 8a rests by means of its shoulders 9a on the pot member 5 and by means of its lower edge rests on the annular step 9b of pot member 5. The support of the pot magnets 7 is effected by the annular step 9c of pot member 5.

The structure of pot member 5 and of pot ring 8a within the area of pot magnets 7 clearly indicates that the insertion of the pot magnets 7 as well as the connection pot member 5 with pot ring 8 can easily be effected, and that no diiculties will be encountered if it is desired to exchange the illustrated elements for elements of different height, provided the diameters within the area of the connection of said members 5 and 8 remain the same.

The embodiment of FIG. 5 is similar to that of FIGS. 3 and 4 with the exception that the pot ring 8b is, by means of a fold 9b at its lower edge placed upon the pot member 5. In this instance, the

annular constriction

6 or 6a is missing. Instead, the pot magnets 7 are covered from the inside by a covering 11 which by means of its edges rests on the

annular steps

12 and 13 of pot member 5 and pot ring 8b.

If desired, the pot magnets 7 may be directly connected to the covering 11 and thus together with the latter may be inserted as a unit between pot member- 5 and pot ring 8b.

The step of locating the covering 11 with the pot magnets 7 may furthermore be improved by designing the covering ring 11 which carries the pot magnets 7 in the form of a speration ring so that the connection will be improved by a spring tension.

According to the embodiment shown in FIG. 6 the pot member 5 similar to FIG. 1 comprises a pot bottom 5a and a bottom ring 5b which latter, however, lacks the constriction 6 of FIG. 1. Placed upon the pot member 5 is a two-sectional pot ring, the narrower ring 14 of which, carries embedded therein the pot magnets 7, whereas the second considerably wider and upper ring 8c is slipped on. The individual elements of the protective pot mantle 3 are also with this embodiment axially slipped upon each other, and this slipping on step of ring 14 also places the pot magnets 7 at their proper place. This embodiment makes the exchange of the individual rings particularly simple and also the exchange of the magnets.

As is clearly indicated in FIGS. 6 and 7, it is particularly advantageous to make the ring 14 of synthetic material as, for instance, copolymers of acrylonitrile, butadiene and styrene and to embed the pot magnets 7 directly in said ring. Advantageously, there is employed the inner cover 15.

Similar to the preceding embodiments, the separating gaps of the individual protective pot mantle parts are located within the area of the respective largest radial extension whereby the manufacture of the individual elements are made particularly simple, and above all, the assembly and the exchange of the parts is considerably facilitated.

As will be evident from the preceding description of the various embodiments of the invention, a continuous outer mantle surface of the protective pot is obtained while the pot magnets arranged in a radially inwardly protruding manner are located within the area of the largest pot extension and thus will not extend into the inner cylindrical space in which the delivery bobbin is located so that the thread withdrawal will not be impeded by the magnets.

The design according to the present inevntion furthermore assures that the pot member and the pot ring positively interengage each other while simultaneously, in view of the annular support, the magnets are located at a definite level and can be inserted prior to the assembly of pot member and pot ring.

It will also be noted that due to the fact that the protective pot on the inside hereof, has a closedring covering he pot magnets, thread or lint is prevented from direct contact with the magnet so that they cannot settle there- Due to the fact that the pot magnets can be connected to the cover ring, the insertion of the pot magnets can be effected simultaneusly with the insertion of the cover ring.

It `will also be evident from the preceding description, the fact that the protective pot is subdivided into three sections makes the assembly of the protective pot particularly simple and above all, yields the possibility of exchanging the individual rings against rings of different widths whereby the height of the protective pot can easily be adapted to the respective requirements without any fundamental change in the construction of the pot. Above all, there is obtained the possibility of producing protective pots of diiierent heights in conformity with the so-called building block system. This is a particularly valuable advantage with respect to the manufacturing process which permits an economical manufacture of protective pots of different dimensions. This fact also furnishes the possibility while employing the same pot parts and pot rings to produce protective pots with different diameter within the range of the largest balloon extension. Also the separator has the possibility merely by exchanging individual pot rings to adapt the pot to different dimensions of the delivery bottom without the necessity to exchange the entire pot.

By making the lower narrow ring of synthetic material in which the pot magnets are embedded, the weight of the protective pot can be considerably reduced. There exists also the possibility of producing the pot member and all pot rings of synthetic material provided it has the necessary rigidity; such synthetic material may be copoylmers of acrylonitrile, butadiene and styrene.

It is, of course, to be understood that the present inven-r tion is, by no means, limited to the particular embodiments illustrated in the drawings, but also comprises any modifications within the scope of the appended claims.

What 'we claim is:

1. A protective pot for multiple twist spindles, espepecially for two-for-one spindles, adapted to receive a bobbin therewithin and to be mounted on a spindle rotor, which includes: a lower pot section, at least one upper pot section detachably connected to said lower pot section, and magnet means mounted on one of said pot sections for cooperation with magnets outside said pot to hold the same stationary, at least one joint between two adjacent pot sections being located within the range of said magnet means.

2. A pot according to claim 1, in which the upper marginal portion of said lower pot section is provided with inwardly directed annular depression means having said magnet means mounted thereon, said upper pot section extending outwardly over said magnet means so as to cover said depression means toward the outside.

3. A pot according to claim 1, in which the lower marginal portion of the one upper pot section which is detachably connected to said lower pot section is provided with inwardly directed annular depression means having said magnet means mounted thereon, said one upper pot section being detachably mounted on said lower pot section, `and the upper marginal portion of said lower pot section extending over said depression means so as to cover said depression means toward the outside.

4. A pot according to claim 1, in which the upper marginal portion of said lower pot section has its inner wall surface provided with at least one annular step for receiving and supporting said magnet means, and in which the lower marginal portion of said one upper pot section which is detachably connected to said lower pot section is provided with ange means resting on said lower pot section.

5. A pot according to claim 1, in which both the inner Wall `surface of the upper marginal portion of said lower pot section and the inner wall surface of the one upper pot section which is detachably connected to the lower pot section are respectively provided with annular steps, and annular cover means resting in said steps for covering said magnet means toward the inside of said pot.

6. A pot according to claim 5, in which said magnet means are connected to said annular cover means.

7. A pot according to claim 5, in which said annular cover means is in the form of a spring ring.

8. A pot according to claim 1, in which the upper pot section comprises a lower relatively narrow annular member adapted to be placed on said lower -pot section and supporting said magnet means, and also comprises an upper relatively wider annular member adapted to be placed on said annular relatively narrow member.

9. A pot according to claim 8, in which said lower relatively narrow annular member consists of synthetic material having the magnetic means embedded therein.

References Cited UNITED STATES PATENTS 2,563,641 8/1951 Colurnbu et al. 57-58.76 XR 2,625,786 1/1953 Klein 57-58.44 2,731,786 1/1956 Klein 57--58.76 X 2,961,824 1l/196O Klein 57-58.83 X 3,159,962 12/1964 Franzen 5758.49 3,177,643 4/1965 Halleux et al 57-58.83 X

FRANK I. COHEN, Primary Examiner. D. WATKINS, Assistant Examiner.

Claims

1. A PROTECTIVE POT FOR MULTIPLE TWIST SPINDLES, ESPEPECIALLY FOR TWO-FAR-ONE SPINDLES, ADAPTED TO RECEIVE A BOBBIN THEREWITHIN AND TO BE MOUNTED ON A SPINDLE ROTOR, WHICH INCLUDES: A LOWER POT SECTION, AT LEAST ONE UPPER POT SECTION DETACHABLY CONNECTED TO SAID LOWER POT SECTION, AND MAGNET MEANS MOUNTED ON ONE OF SAID POT SECTIONS FOR COOPERATION WITH MAGNETS OUTSIDE SAID POT TO HOLD THE SAME STATIONARY, AT LEAST ONE JOINT BETWEEN TWO ADJACENT POT SECTIONS BEING LOCATED WITHIN THE RANGE OF SAID MAGNET MEANS.