US3793820A

US3793820A - Device for ringless spinning of fibers

Info

Publication number: US3793820A
Application number: US00021428A
Authority: US
Inventors: J Rajnoha; L Bures; J Dolezal; M Jungmann
Original assignee: Elitex Zavody Textilniho
Current assignee: Elitex Zavody Textilniho
Priority date: 1969-03-20
Filing date: 1970-03-20
Publication date: 1974-02-26
Anticipated expiration: 1991-02-26
Also published as: FR2037233B1; JPS5118528B1; DE2012490A1; FR2037233A1; GB1297308A

Abstract

A hollow rotary spinning chamber has a shaft fixed therewith and defining an axis of rotation for the chamber. Drive means engages the shaft for rotating it and thereby the spinning chamber. Magnetic means maintains the shaft in a predetermined operative position in lieu of bearings.

Description

United States Patent [191 Rajnoha et al.

[ DEVICE FOR RINGLESS SPINNING 0F FIBERS [75] Inventors: Jaroslav Rajnoha, Tyniste nad Orlici; Ladislav Bures, Usti nad Orlici; Josef Dolezal, Usti nad Orlici; Miroslav Jungmann, Usti nad Orlici, all of Czechoslovakia [73] Assignee: Elitex Zavody Textilnilio Shojuenstvi Generalin Reditelslvi, Liberec, Czechoslovakia 22 Filed: Mar. 20, 1970 21 Appl. No.: 21,428

[30] Foreign Application Priority Data Mar. 20, 1969 Czechoslovakia 1980-69 [52] U.S. CI. 57/58.89 [51] Int. Cl D0lh 1/12 [58] Field of Search ..57/58.89, 58.91, 58.93, 1 ,1 ,177- 5 [56] References Cited UNITED STATES PATENTS 3,304,706 2/1967 Mattingly 57/77.45

[ Feb. 26, 1974 3,355,871 12/1967 Mattingly... s7/77.45 3,473,313 10/1969 Crouzet 57/77.45

3,447,298 6/1969 Collins 57/58.89 3,447,299 6/1969 Negishi 57/58.89

FOREIGN PATENTS OR APPLICATIONS 234,010 6/1964 Austria 57/77.45

755,372 3/1967 Canada 57/77.45 998,091 7/1965 Great Britain 57/77.45

Primary Examiner-Werner H. Schroeder Attorney, Agent, or Firm--Michae1 S. Striker [5 7] I ABSTRACT A hollow rotary spinning chamber has a shaft fixed therewith and defining an axis of rotation for the chamber. Drive means engages the shaft for rotating it and thereby the spinning chamber. Magnetic means maintains the shaft in a predetermined operative position in lieu of bearings,

24 Claims, 15 Drawing Figures PATENTEDFLHZU mm SHEET '4 BF 7 FIG] 6 3K, i 1 n w BACKGROUND OF THE INVENTION The present invention relates generally to spinning machines, and more particularly to machines for ringless spinning of fibers. Still more particularly the present invention relates to spinning machines using rotary spinning chambers.

Machines of the general type in question herein are already known. They use a generally cup-shaped rotary spinning chamber which is rotated at high speed and onto an inner circumferential wall of which fibers in carded and separated state are deposited in known manner, whereupon these fibers become connected with one another under the influence of centrifugal force and can be withdrawn as a continuous thread from the spinning chamber.

Such spinning chambers must be rotated at high speeds which requires that they are mounted in special highspeed bearings. Consequently all spinning chambers of the type which have heretofore become known do, in fact, utilize high-speed bearings by means of which the spinning chambers are mounted for rotation. Such bearings, however, are very expensive to manufacture because of the precision requirements which are made of them. On the other hand, they must be constantly and precisely lubricated with special lubricants and despite this they are subjected to considerable heating and friction so that their lifetime is very short. Finally, in operation these bearings are rather noisy.

SUMMARY OF THE INVENTION It is a general object of the present invention to overcome the aforementioned disadvantages.

More particularly it is an object of the present invention to provide, in a device for ringless spinning of f1- bers, a construction wherein the rotary spinning chamber need not be journalled in bearings.

Still more specifically it is an object of the present invention to provide such a device wherein the spinning chamber is in effect journalled by magnetic means which serves to maintain the spinning chamber in desired position.

In pursuance of the above objects, and others which will become apparent, one feature of the invention resides in a device for ringless spinning of fibers which comprises, briefly stated, a hollow rotary spinning chamber and a shaft which is fixed with this spinning chamber and which defines an axis of rotation for the same. Drive means engages the shaft for rotating the same and thereby the spinning chamber, and magnetic means maintains the shaft in a predetermined operative position in lieu of bearings.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is an axial sectional elevation illustrating one embodiment of the invention;

FIG. 2 is a top-plan view of FIG. 1;

FIG. 3 is a view similar to FIG. 1 and illustrating a further embodiment; I

FIG. 4 is a view similar to but illustrating the embodiment of FIG. 3;

FIG. 5 is a view similar to FIG. 1 illustrating yet an additional embodiment;

FIG. 6 is a view similar to FIG. 2 but of FIG. 5, and also taken in a partial section on line VI-VI of FIG. 5;

FIG. 7 is another view similar to FIG. 1 but illustrating still a further embodiment of the invention;

FIG. 8 is a section taken on line VIII-VIII of FIG.

FIG. 9 is a view similar to FIG. 7 illustrating still another embodiment of the invention;

FIG. 10 is a section on line X-X of FIG. 9;

FIG. 11 is a view similar to FIG. 9 illustrating still another embodiment of the invention;

FIG. 12 is a view similar to FIG. 7 illustrating an additional embodiment of the invention;

FIG. 13 is a section on line XIII-XIII of FIG. 12;

FIG. 14 is also a view similar to FIG. 7 but illustrating a final embodiment of the invention; and

FIG. 15 is a section on line XV-XV of FIG. 14.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Discussing now the drawing in detail, and firstly the embodiment illustrated in FIGS. 1 and 2, it will be seen that reference numeral 2 identifies a spindle mounted on or in the body or housing 1. The spindle carries connected thereto for rotation with it a hollow carding roller 3 of known construction, and is provided at its free end with a pulley 4, for instance for engagement by a drive belt or the like (not illustrated) so that the spindle may be rotated about its axis. In the illustrated embodiment the carding roller is provided on its inner circumferential surface with two annular beads or

projections

5 and 6 which are circumferentially continuous. A holder is identified with reference numeral 9 and a recess is provided in the separating or carding roller 3 for the

bearings

11, 12 of the holder 9.

The outer circumferential surface of the carding roller 3 is provided with a carding configuration, that is it is of such configuration that it cards or separates fibrous sliver fed to it into its constituent fibers. In the illustrated embodiment this is achieved by providing the exterior of the carding roller 3 with the covering 10 having saw-tooth external configuration, although needles, pins or the like could also be provided.

Holder 9 is secured to a lid 14 in which a rotating spinning chamber 15 is mounted. A shank or shaft 16 is rigid with the spinning chamber 15 and provided with an annular projection 17.

Bearings

11 and 12 of the holder 9 have a certain clearance, in conjunction with the member 13, permits the necessary adjustment of the spinning chamber 15 and its axial retention. The annular projection 17 of the shaft 16 extendsinto a corresponding notch provided in the member 13 and the shaft, which extends through the

bearings

11, 12 is in contact with the inner side of the

heads

5 and 6.

Laterally of the carding roller 3, at the side which is proximal to the shaft 16 of the spinning chamber 15, retaining means is provided in form here of

permanent magnets

18 and 19 which in this embodiment may be of annular or circular shape. The magnets are each adjacent to the shaft 16 and their coincident poles are juxtaposed. A pole shoe 21 is provided interposed between the juxtaposed poles, and two

further pole shoes

20, 21 each cooperate with the respective poles of the

permanent magnets

18 and 19. All of the pole shoes extend towards the shaft 16, thus maintaining the same in predetermined operative position. In other words, the shaft 16 is maintained in its predetermined operative position and can deviate from this position only by the clearance value determined by the

bearings

11 and 12, that is to a negligible extent. It is to be understood that the

bearings

11 and 12 are not journals for the shaft 16 but only serve to determine the permissible deviation of the shaft 16 from its permanent position. The shaft is thus capable of rotation without being journalled in bearings-keeping in mind what has just been said about the purpose of the bearings 11 and l2and the expense of providing high-speed bearings, of lubricating them, and the noise associated with the operation of such bearings are thereby eliminated.

The embodiment illustrated in FIGS. 3 and 4 differs from the embodiment of FIGS. 1 and 2 primarily in that the

bearings

11 and 12 of FIGS. 1 and 2 are omitted and the permissible deviation of the shaft 16 from its predetermined position is defined by the illustrated annular disc members. Like elements are again identified with like reference numerals. Here, however, the projection 17 on shaft 16 extends into a recess 28 provided on an annular disc member 27. A holder 25 is mounted on the lid 14 and pairs 26, 26' and 27, 27' of annular disc members are mounted ON

shafts

23, 24 respectively, which in turn are held by the holder 25. The holder 25 is so arranged that in normal operative position of the shaft 16 the rotating shaft will not be in contact with the

disc

26, 26 and 27, 27'. The latter, that is the discs just mentioned, serve only to prevent shaft 16 from misalignmentthat is from deviating from its predetermined position-during starting and braking of the carding roller 3.

In this embodiment, as in FIGS. 1 and 2, radial retention of the shaft 16 against displacement from its operative position is also effected by means of the

permanent magnets

18 and 19 with their

respective pole shoes

20, 21 and 22.

The embodiment illustrated in FIGS. and 6 provides for an arrangement of the rotary spinning chamber within the circumferential confines of the carding roller 3. Again, like reference numerals identify like elements. Here, however, the spinning chamber is mounted with its shaft 16 within the circumferential confines of the carding roller 3. The shaft 16 is provided with annular radial projections 31, 31' and is in contact with two pairs of driving

discs

34, 34 and 35, 35', respectively. These discs are mounted on the respective shafts 29, 29' which are secured in a holder 36 of magnetized material which at the same time also constitutes a pole shoe of a permanent magnet 37. The latter may have cubical or parallelepipedal form and is mounted between the opposite axial end sections of the holder 36. The projections 31, 31' serve to secure the shaft 16 in its desired axial position.

At least one of the two pairs of

discs

34, 34 and 35, 35' is in contact with the inner circumferential surface of the carding roller 3. There is further provided an additional holder 40 arranged adjacent the holder 36 in the illustrated manner laterally of the shaft 16 and supporting a shaft 30 on which a further pair 41, 41' of discs is mounted. A pair of permanent magnets 41, 42-which may have the form of rods, parallelepipeds or another desired configuration -are located at diametrally opposite sides of the shaft 30 and the discs 41, 41 (see FIG. 6). The poles of the magnets 42, 42' are arranged opposite to magnet 37 and the holder 40 constitutes with its upper and lower portions pole shoes for the

magnets

42, 42. The purpose of these secondary magnets is to provide for contact of the

disc

41, 41 with the shaft 16 of the chamber 15.

A main magnet 43 is mounted in the housing 1 exteriorly of the carding roller 3 and has its poles arranged oppositely with reference to those of the magnet 37, and its

pole shoes

44, 45 directed towards the carding roller 3. The purpose and operation of this embodiment is, of course, the same as before.

In the embodiment of FIGS. 7 and 8 drive-

discs

50, 51 and a pulley 52 are mounted on the shaft 2 of the carding roller 3; the pulley 52 receives rotary motion from a non-illustrated drive. Shaft 2 is rotatably journalled in

sleeves

55, 55 which in turn are mounted and spaced apart in a sleeve 56 surrounding the shaft 2 with clearance. The rotary spinning chamber is identified with reference numeral 15 and it should be emphasized that its particular construction is nowhere disclosed in detail herein, because this construction is well known in the art and is conventional as far as considerations of the present invention are concerned. Reference numeral 16 again identifies the shaft for the spinning chamber 15 and contacts the peripheries of the drive discs and 51. It extends through

openings

62, 62 provided in the pole shoes 58, 59 which are common both to the main magnet 57 and to the auxiliary magnet 65. The main magnet 57 is of annular configuration and surrounds the sleeve 56 as well as the sleeves 55, carried thereby; these sleeves are of non-magnetic material.

A holder 71, also of non-magnetic material and having a generally rod shape or parallelepiped configuration is connected with the pole shoe 59 below an auxiliary magnet 65, as mentioned above and is provided with an extension 60 projecting underneath the main magnet 57 and by means of which the entire device is secured to a beam or support 61 of non-magnetic material.

A magnet 70 is mounted on the holder 71 and provided with a pole shoe 69 facing an annular projection at the free end of the shaft 16. The free end, or the annular projection 66, is provided with an axial recess 67 and a spherical member or ball 68 is partly received in the recess 67 and in contact with the pole shoe 69. The shaft 16 is thereby secured against axial displacement.-

The main magnet 57 and the auxiliary magnet are so arranged that their like poles are coincident, that is they face in the same direction. The openings 62, 62' in the pole shoes 58 and 59 surround the shaft 16 with clearance. Their configuration (see FIG. 8) is such that they each have two oppositely located

projections

63, 64 and 63, 64, respectively, which are spaced at unequal distances from the shaft 16 in such a manner that the narrower gap-that is the distance which is the smaller-is located at the side of the

drive discs

50, 51. At the side away from the

drive discs

50, 51 the gap between the respective projection (here the projections 64, 64) and the shaft 16 is larger and this, together with the auxiliary magnet 65 located at the same side,

contributes to stabilization of shaft 16 during its rotary motion.

Coming to the embodiment shown in FIGS. 9 and 10 it will be seen that this is generally similar to the one in FIGS. 7 and 8. Here, however, two permanent annular magnets 72 and 72' are employed which surround the sleeve 56 consisting of non-magnetic material. There are further provided two

auxiliary magnets

73 and 73 which may have the form of rods, cubes or parallelepipeds or another suitable configuration and which are located at the opposite side of the shaft 16 from the magnets 72, 72 (see FIG. 9). The two pairs of magnets are connected at their identical poles, a pole shoe 58' being interposed and provided with an opening 62' having the same shape as the

openings

62, 62 of FIGS. 7 and 8. The drawing of FIG. 9 clearly shows that the shaft 16 of the spinning chamber thus also passes through the opening 62". In other respects the embodiment of FIGS. 9 and 10 is the same as that of FIGS. 7 and 8.

FIG. 11 shows an alternative embodiment to that of FIGS. 9 and 10. Here a plurality of

circular magnets

73, 73' and 73" is provided which surrounds and are mounted upon the non-magnetic sleeve 56. The

magnets

73, 73 and 73" are provided with

pole shoes

74, 74, 74" and 75. The latter, that is the pole shoe 75, is provided with an extension 76 by means of which the entire device is fixedly secured with a support or beam 61 in suitable manner. Element 61 again consists of non-magnetic material. Shaft 16 (the spinning chamber 15 is omitted) is provided at its free or bottom end with a tip 78 which engages a support bearing 79 to locate the shaft 16 in desired axial position.

In the embodiment of FIGS. 12 and 13 like reference numerals again identify like elements as in the preceding embodiments. Here, however, there is provided a holder 80 of non-magnetic material which is mounted on the support 61 and provided with a tubular portion 80a which takes the place of the sleeve 56 in the preceding embodiments and which mounts the sleeves 55, 55'. The shaft 2 of the carding roller 3 is journalled in the sleeves 55, 55'. Drive

discs

50, 51 are provided as well as a pulley 52 by means of which motion is imparted to the shaft 2 from a non-illustrated source of motion.

A pole shoe 81 is mounted adjacent the tubular portion 80a between the

drive discs

50 and 51. On the side facing away from the shaft 2 the pole shoe 81 is provided with alternating projections 82 and recesses 83 which may be of identical widthwith reference to the axial elongation of the

shafts

2 and 16--or of which the projections 82 may have a greater width than the recesses 83, or vice versa. Again, the recesses 82 and 83 may be entirely omitted. In the illustrated embodiment, where the recesses 82 and 83 are provided, the shaft 16 of the rotary spinning chamber 15 is provided with corresponding recesses 86 and projections 85 whose dimensions correspond to those of the projections 83 and recesses 83 and which are juxtaposed with their counterparts. Alternately, the shaft 16 may be smooth, that is the

recesses

85 and 86 may be omitted. Rod-like

permanent magnets

87 and 88 are mounted in pole shoe 81 and their identical poles are located adjacent one another. They serve by means of the pole shoe 81 to provide the axial and radial stabilization of the shank 16 and thereby of the spinning chamber .15 which constitutes the concept of the present invention.

Coming, finally, to the embodiment illustrated in FIGS. 14 and 15 it will be seen that this is again rather similar to the embodiment of FIGS. 7 and 8. Here, a holder 94 is provided one of the ends of which is secured to the support 61. Its tubular portion 94a corresponds to the sleeve 56 and journals the sleeves 55 and 55' in which the shaft 2 of the carding roller 3 is mounted for rotation. Drive

discs

50, 51 are mounted also on the shaft 2 for rotation therewith and contact the shaft 16 of the spinning chamber 15.

Mounted in a cylindrically configurated portion 95 of the holder 94 are two semi-circular or horseshoeshaped

permanent magnets

89 and 90 with

pole shoes

91 and 92 being interposed between them which extend in the direction towards the shaft 16 to thereby secure the same radially against movement. The

magnets

89 and 90 are arranged adjacent the pole shoes 91 and 92 with their like poles being coincident. Axial stabilization of the shaft 16 against movement is the same as in the embodiment of FIGS. 7 and 8. A

The various embodiments having been described with respect to their structural features, the operation of the device according to the present invention will now be explained. In the embodiments of FIGS. 1 and 2 rotary motion is transmitted to the shaft 2 of the carding roller 3 by means of the pulley 4 from a nonillustrated source. As the carding roller 3 moves it transmits motion to the shaft 16 of the spinning chamber 15 which is in engagement with and rolls on the

beads

5 and 6. It will be appreciated that in all embodiments suitable passages will be provided, connecting the carding roller with the spinning chamber so that iibers can move from the former to the latter. Such passages, and the flow-direction of the fibers, are shown in FIGS. 1, 2 and 5. A detailed description is not, however, believed necessary because the passages per se are already known from the art, for instance from U.S. Pat. No. 3,455,097 to which reference may be had for further information. The position of the shaft 16 is stabilized on the one hand by the

bearings

11 and 12 and the projection 17, and on the other hand by the

permanent magnets

18 and 19 the pole shoes 20, 21 and 22 of which attract the shaft 16 of the spinning chamber 15 to the

projections

5, 6 and thus stabilize it in its desired position.

In the embodiment of FIGS. 3 and 4 the position of the shaft 16 is stabilized by the

discs

26, 26' and 27, 27' of which at least one pair, in this embodiment of the discs 27, 27', is associated with the projection 17 at such time as the shank 2 is started or stopped in its rotation. After the starting phase is completed, shaft 116 is I no longer in contact with

discs

26, 26' and 27, 27 '-and f is maintained in engagement with the

projections

5 and 6 of the carding roller 3 exclusively by the

permanent magnets

18, 19 and their

pole shoes

20, 21 and 22.

When the rotation of the shaft 2 and the carding roller l 3 is stopped, so that motion transmitted to the shaft 16 by means of the

beads

5 and 6 is interrupted, the again contacts the

discs

26, 26' and 27, 27.-

In the embodiment of FIGS. 5 and 6 rotary motion is I transmitted to at least one of the pairs of

discs

34, 35

when the shaft 2 is started, by contact with the inner wall surface of the carding roller 3. The shaft 16 is pressed by the action of the discs 41 and 41' against the two pairs of

discs

34, 35 because of the mutual attraction of the permanent magnet 37 and the permanent magnets 42, 42' via the

holders

36 and 40, which constitute the pole shoes of the magnet 37 or the magnets 42, 42' respectively, which magnets are arranged with their opposite poles towards one another. Securing of contact of at least one of the two pairs of

discs

34, 35 with the inner circumferential surface of the rotating carding roller 3 is thus an inevitable condition for achieving rotation of the shaft 16 as well as the stabilization of its position. It is achieved by the provision of the main magnet 34 located outside the carding roller 1 and acting with its

pole shoes

44 and 45 upon the holder 56 which in turn forms a pole shoe of the magnet 37 the poles of which are arranged oppositely with respect to the signs of the poles of the magnet 43.

In the embodiment of FIGS. 7 and 8 rotation of the carding roller 3 and

discs

51 and 52 is imparted to the shaft 16 of the spinning chamber 15. The shaft 16 is radially secured by the magnet 57 and the magnet 65. They both act upon shaft 16 with their

common pole shoes

58 and 59 and with the pole shoes 63, 64 and 63, 64 respectively. The shaft 16 is axially secured by the magnet 70, the spherical member 68 and the recess in which the latter is received.

In the embodiment of FIGS. 9 and rotation of the carding roller 3 results in the rotation of the

discs

50 and 51 which, being in contact with the shaft 16, rotate the latter. The permanent magnets 72 and 72' act upon the shaft 16 magnetically to radially secure it. Permanent magnets 73 and 73' act on the shaft 16 via the pole shoes 63, 64, 63, 64', 63" and 64" in the

openings

62, 62 and 62" of the

common pole shoes

58, 58 and 59. The shaft 16 is axially secured against displacement in the same manner as discussed above with respect to the embodiment of FIGS. 7 and 8.

In FIG. 11 the

drive discs

50 and 51 transmit rotary motion from the shaft 2 of the carding roller 3 to the shaft 16. The

magnets

73, 73' and 73" with their

pole shoes

74, 74, 74" and 75 act upon and secure the shaft 16 in radial direction, whereas the bearing 79 maintains the shaft 16 against displacement in axial direction.

In FIGS. 12 and 13 rotary motion to the shaft 16 is imparted by the

discs

50 and 51 in response to the rotation of the shaft 2. Radial and axial maintaining of the shaft 16 in its predetermined location takes place via an open magnetic circuit by means of the pole shoes 81 through the

permanent magnets

87 and 88, whereas the pole shoe 81 as well as the shaft 18 cannot be provided with projections 82 or 85, and recesses 83 or 86 which have been described earlier with respect to these Figures.

In FIGS. 14 and 15, finally, shaft 16 is rotated by contact with the

discs

50 and 51 which in turn are rotated in response to rotation of the shaft 2. Shaft 16 is radially maintained in its predetermined position by a closed magnetic circuit with the pole shoes 91 and 92 which are directed towards shaft 16 from two opposite sides, in response to the action of two semi-circular or horseshoe-shaped

magnets

89 and 90 which surround the shaft 16 over part of its length. The axial maintenance of shaft 16 in its predetermined position is the same as described with respect to FIGS. 7 and 9.

It will be clear from what has been set forth that by resorting to the present invention there is obtained a very simple construction, eliminating the need for highspeed bearings for journalling the shaft 16. The reliability in the transmission of rotary motion in these constructions according to the present invention is superior to what is known from the art, and the mainte nance of the shaft in the correct operating position- -and therefore of the spinningchamber-with respect to radial and axial positioning, is accomplished in a very simple and highly efficient manner. All of this con tributes in a significant improvement in the operation of a machine utilizing an arrangement and in a consequent improvement of the thread or yarn quality produced with the arrangement on such a machine.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.

While the invention has been illustrated and described as embodied in a device for ringless spinning of fibers, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims:

1. In a device for ringless spinning of fibers, in combination, a hollow cylindrical carding roller having an inner circumferential surface and being mounted for rotation about a first axis; a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining for the same a second axis of rotation axially paralleling said first axis, said shaft extending in part into said carding roller; magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings; and drive means, comprising motiontransmitting elements on said inner circumferential surface, engaging said shaft for rotating the same and said spinning chamber in response to rotation of said carding rollers.

2. In a device as defined in claim 1, said motiontransmitting elements comprising at least two circumferentially complete annular beads provided on said inner surface axially spaced from one another and in engagement with an outer surface of said shaft.

3. In a device as defined in claim 1; further comprising retaining means operative for retaining said shaft at least substantially against movement to positions in which it is skew with reference to said predetermined position, during starting and stopping of said rotation.

4. In a device as defined in claim 3, said retaining means comprising annular retaining members surrounding said shaft with predetermined radial clearance and being fixedly mounted in said carding roller.

5. In a device as defined in claim 1 said motiontransmitting elements comprising at least two pair of coaxial motion-transmitting annuli surrounding said shaft in motion-transmitting relationship therewith, at least one of said pairs contacting said inner surface and receiving rotary motion in response to rotation of said carding roller.

6. In a device as defined in claim 1, said magnetic means comprising at least two permanent magnets having like poles which face one another, and pole shoes facing said shaft.

7. In a device as defined in claim 6, said permanent magnets being rod shaped.

8. In a device as defined in claim 6, said permanent magnets being circumferentially complete annular magnet members of circular outline.

9. In a device as defined in claim 6, said permanent magnets being circumferentially incomplete annular magnet members of semi-circular outline.

10. In a device as defined in claim 6, said permanent magnets being of substantially cubical configuration.

11. In a device as defined in claim 6, said permanent magnets being of parallelepipedal configuration.

12. In a device as defined in claim said magnetic means comprising a main magnet and three auxiliary magnets, a holder for said main magnet supporting the latter exteriorly of said carding roller adjacent the wall of the same, said holder constituting a pole shoe for one of said auxiliary magnets located within said roller and having two poles arranged oppositely said main magnet, and a pair of permanent reinforcing magnets mounted on said motion-transmitting annuli and having poles positioned in coincident relationship with those of said main magnet, and an additional holder holding said reinforcing magnets and constituting a pole shoe for the same.

13. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a first shaft fixed with said spinning chamber and defining an axis of rotation for the same; magnetic means maintaining said first shaft in a predetermined operative position in lieu of bearings; a carding roller having a second shaft and being mounted for rotation in axial parallelism with said axis of rotation of said chamber; and drive means, comprising at least two annular drive members surrounding and fixed to said first shaft and operatively as sociated with said second shaft for receiving rotary motion from the same.

14. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings, said magnetic means comprising a plurality of permanent magnets arranged above one another and having respective coincident poles, and pole shoes connecting said coincident poles.

15. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings, said magnetic means comprising a plurality of permanent magnets arranged above one another at opposite sides of said shaft, and pole shoes on said magnets and cooperating with said shaft for maintaining the same in said predetermined position.

16. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings, said magnetic means comprising a plurality of permanent magnets arranged adjacent one another all at one side of said shaft and having respective coincident poles, and a pole shoe extending longitudinally of said shaft and connecting said coincident poles.

17. In a device for n'ngless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining shaft in a predetermined operative position in lieu of bearings, said magnetic means comprising a plurality of permanent magnets surrounding said shaft and having respective coincident poles, and pole shoes extending longitudinally of said haft directed towards the same and connecting said coincident poles.

18. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same, said shaft having an upright orientation and a free lower end; a bearing below said lower end, supporting and journalling the same; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings.

19. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same, said shaft having an upright orientation and a free lower end; a permanent magnet cooperating with said lower end for maintaining it in a predetermined position; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings.

20. In a device as defined in claim 19, said permanent magnet being located below said free end and an upwardly facing pole shoe; and further comprising a reinforcement portion provided on said free end, a recess provided in said reinforcement portion having an open side facing downwardly towards said pole shoe, and a spherical member of magnetizable material partially received in said recess and in magnetic engagement with said pole shoe.

21. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and maintaining means maintaining said shaft in a predetermined operative position in lieu of bearings, said maintaining means comprising permanent magnet means having a pole shoe extending along but slightly spaced from said shaft, a plurality of circumferential first recesses and first projections provided on said shaft alternating in axial direction thereof, and a plurality of second recesses and second projections provided on said pole shoe, each of said second recesses being bination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings, said magnetic means comprises a plurality of permanent magnets at least one of which has a magnetic force which is lower that that of the others.

Claims

1. In a device for ringless spinning of fibers, in combination, a hollow cylindrical carding roller having an inner circumferential surface and being mounted for rotation about a first axis; a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining for the same a second axis of rotation axially paralleling said first axis, said shaft extending in part into said carding roller; magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings; and drive means, comprising motion-transmitting elements on said inner circumferential surface, engaging said shaft for rotating the same and said spinning chamber in response to rotation of said carding rollers.

2. In a device as defined in claim 1, said motion-transmitting elements comprising at least two circumferentially complete annular beads provided on said inner surface axially spaced from one another and in engagement with an outer surface of said shaft.

5. In a device as defined in claim 1 said motion-transmitting elements comprising at least two pair of coaxial motion-transmitting annuli surrounding said shaft in motion-transmitting relationship therewith, at least one of said pairs contacting said inner surface and receiving rotary motion in response to rotation of said carding roller.

7. In a device as defined in claim 6, said permanent magnets being rod shaped.

12. In a device as defined in claim 5; said magnetic means comprising a main magnet and three auxiliary magnets, a holder for said main magnet supporting the latter exteriorly of said carding roller adjacent the wall of the same, said holder constituting a pole shoe for one of said auxiliary magnets located within said roller and having two poles arranged oppositely said main magnet, and a pair of permanent reinforcing magnets mounted on said motion-transmitting annuli and having poles positioned in coincident relationship with those of said main magnet, and an additional holder holding said reinforcing magnets and constituting a pole shoe for the same.

13. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a first shaft fixed with said spinning chamber and defining an axis of rotation for the same; magnetic means maintaining said first shaft in a predetermined operative position in lieu of bearings; a carding roller having a second shaft and being mounted for rotation in axial parallelism with said axis of rotation of said chamber; and drive means, comprising at least two annular drive members surrounding and fixed to said first shaft and operatively associated with said second shaft for receiving rotary motion from the same.

17. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining shaft in a predetermined operative position in lieu of bearings, said magnetic means comprising a plurality of permanent magnets surrounding said shaft and having respective coincident poles, and pole shoes extending longitudinally of said haft directed towards the same and connecting said coincident poles.

21. In a device for ringless spinning of fibers, in combination, a hollow rotary spinning chamber; a shaft fixed with said spinning chamber and defining an axis of rotation for the same; drive means engaging said shaft for rotating the same and said spinning chamber; and maintaining means maintaining said shaft in a predetermined operative position in lieu of bearings, said maintaining means comprising permanent magnet means having a pole shoe extending along but slightly spaced from said shaft, a plurality of circumferential first recesses and first projections provided on said shaft alternating in axial direction thereof, and a plurality of second recesses and second projections provided on said pole shoe, each of said second recesses being juxtaposed with one of said first recesses and each of said second projections being juxtaposed with one of said first projections.

22. In a device as defined in claim 21, wherein said projections and recesses are of identical width in axial direction of said shaft.

23. In a device as defined in claim 21, wherein the width of said projections in axial direction of said shaft is greater than the corresponding width of said recesses.

24. In a device for ringless spinning of fibers, in combination, a hollow rotary spinNing chamber; a shaft fixed with said spinning chamber and defining an axis of rotation; drive means engaging said shaft for rotating the same and said spinning chamber; and magnetic means maintaining said shaft in a predetermined operative position in lieu of bearings, said magnetic means comprises a plurality of permanent magnets at least one of which has a magnetic force which is lower that that of the others.