Abstract: Briefly described, embodiments of this disclosure include a yam twisting or cabling apparatus, methods of twisting or cabling yarn, and the like.

Abstract: A twisting device having a pair of fiber cakes that are simultaneously hung on a transversely disposed creel, respectively unwind two fiber strands downwardly during the rotation process of the creel. Each of the two fiber strands passes through a strand-cut sensor and then enter a balloon control ring. Through the guide of an oil ring, each of the fiber strands is twisted and then wound around a bobbin driven by a spindle motor. The pair of balloon control rings and the pair of oil rings are simultaneously driven by a ring rail to move upward and downward on the bobbin.

Abstract: A method of centrifugally spinning a staple fiber yarn (17) comprising, in a first stage, drawing a feed material (6) by a drafting device (9) into a partially twisted yarn (11); and delivering the partially twisted yarn into a spinning centrifuge (3) via an axially shiftable yarn guidance tube (7); and in a second stage, further twisting the partially twisted yarn (11) into a finished yarn (17) while winding it onto a cheese (15). Before completion of the first stage, a yarn end from the cheese (15) is placed in the drafting device (9) onto the feed material and joined to the partially twisted yarn (11), the feed material (6) is separated, the yarn direction is changed and the partially twisted yarn (11) from the centrifuge (3) is withdrawn in the second stage from the centrifuge (3) and wound onto the cheese (15).

Abstract: A method for operating a pot spinning machine which has a plurality of identical work stations each having a drafting device with a slubbing stop device, a spinning centrifuge rotating at high speed around an axis, and a tubular reciprocable guide. A slubbing emerging from the yarn guide mouth forms a rotating yarn leg which is deposited on the inner wall of the spinning centrifuge in the form of a spinning cake. At the start of a spinning cycle of the spinning machine, the individual spinning centrifuges of the spinning machine are checked for the presence of yarn cake remnants.

Abstract: A method and a device for winding a spun yarn body from an inside wall of a spinning centrifuge of a pot spinning machine onto a tube (10) introduced for such purpose into the spinning centrifuge. The yarn extending between a yarn guide tube (6) and the inside wall of the spinning centrifuge is caught by lowering the tube past the mouth of the yarn guide tube and the winding process initiated. A remnant of spinning yarn is created thereby between the draw frame and the tube foot. In order to avoid disturbances due to the free end of this remnant of spinning yarn, the remnant of spinning yarn is separated from the yarn body and the tube and subsequently removed by suction.

Abstract: A centrifugal spinning machine having at least one spinning station (10), each of which has one rotatable spinning centrifuge (14), one yarn guide (18) that can be supplied with a fibrous spinning strand (26′), and one drive device (38) for generating an axial motion between the yarn guide (18) and the spinning centrifuge (14). The yarn (26) is guided in the yarn guide (18) to travel through the rotational axis of a rotor 46 of the drive device (38).

Abstract: The invention relates to a pot spinning device (2) having a spinning housing (16), a spinning centrifuge (11), which rotates at a high number of revolutions inside the spinning housing, as well as a rotatably seated centrifuge sheathing (20) arranged between the spinning housing and the spinning centrifuge, which is dragged along by the rotating spinning centrifuge (11) by means of air friction. In accordance with the invention, the spinning centrifuge (11) as well as the centrifuge sheathing (20) are seated in a contactless manner in magnetic bearings (31, 35, or respectively 18, 19).

Abstract: A yarn is made on a pot-spinning machine by drafting a roving and then condensing the roving via a suction roller or belt before the yarn is twisted on a pot-spinning station.

Abstract: A yarn is produced by condensing and compacting the roving after its passage through a drafting frame by suction rollers or suction belts and then twisting and winding up the yarn without the formation of a thread balloon on a ring spinning station with a balloon-limiting finger or crown.

Abstract: A spinning machine in which downstream of the drafting frame and as part thereof, beyond the output rollers thereof, a suction roller is provided above the roving and cooperates with at least one counterroller below the roving to condense the roving before it is wound up on a ring-spinning or pot-spinning station.

Abstract: To produce a mock yarn which is similar in appearance to a true yarn with respect to the ability to discern the components of the mock yarn after the twist has been imparted to the mock yarn, the rovings or slubbings forming the mock yarn, after drafting separately but parallel to one another in a drafting frame, are subjected separately to condensing and compaction by suction rollers or belts provided with rows of perforations. Thus compacted and condensed rovings are then combined, twisted and wound up as mock yarns. A core thread can be introduced into each roving or into at least one of the rovings upstream of the last pair of drafting rolls or immediately upstream of the condensing unit for a core mock yarn.

Abstract: A method and a device for initiating the rewinding process after a yarn break in single stage pot spinning. In the process, a yarn detaching device (14) is introduced into a spinning centrifuge (3) rotating a high rpm, and places a cutting edge (16, 48) against the conically wound portion (32) of a spinning cake (15) deposited on the inner wall (26) of the spinning centrifuge (3). The yarn detaching device (14) has a yarn guide device, whose yarn guide contour (17, 43) covers the cutting edge (16, 48) of the yarn detaching device (14) such that in the course of the initiation of the rewinding process lower winding layers of the conically wound portion (32) are lifted on the rewinding tube (9) and in this way dependably prevents the winding of yarn around the yarn detaching device (14) during the rewinding process.

Abstract: A centrifugal spinning and winding machine (23) with a plurality of work stations (1) arranged in series. The work stations (1) comprise several autonomous centrifugal spinning units (2), an associated winding device (5), and an associated storage device (4) located between the centrifugal spinning units (2) and the winding device (5) and having at least one storage path (31) for holding spinning cops (16) and at least one waiting path (33) for holding empty bobbin tubes (11) for supply to the spinning units and the winding device.

Abstract: A spinning machine having a drafting frame, a condensing unit at the downstream side of the drafting frame and a spinning station for winding up the yarn and imparting twist to the roving in forming the yarn. The condensing unit comprises a disk-shaped suction rotor oriented in a plane tangent to the output rollers of the drafting frame. A limited compaction zone is formed by a shield within a suction rotor and designed to apply suction only to a limited portion of the perforated periphery thereof. The pressing roller bears against the suction rotor at the downstream side of the compaction zone.

Abstract: A method of staining preselected, mounted specimens of either biological or nonbiological material enclosed within a staining chamber where the liquid staining reagents are applied and removed from the staining chamber using hypergravity as the propelling force. In the preferred embodiment, a spacecraft-operated centrifuge and method of diagnosing biological specimens while in orbit, characterized by hermetically sealing a shell assembly. The assembly contains slide stain apparatus with computer control therefor, the operative effect of which is to overcome microgravity, for example on board an International Space Station.

Abstract: A pot spinning machine for forming a spinning cop includes a spinning pot onto an interior of which yarn is deposited to form a spinning cake; a yarn guide which deposits the yarn onto the spinning pot to form the spinning cake; a yarn carrier onto which the yarn is rewound from the spinning cake to form the spinning cop; and a lifting member that engages, moves, and positions the yarn carrier with respect to the spinning pot. The yarn guide comprises a yarn passage defined only by the yarn carrier through which the yarn passes in direct exposure to said yarn carrier for deposit in the spinning pot. A method for forming a spinning cop includes depositing yarn onto an interior of a spinning pot of the pot spinning machine to form a spinning cake; and rewinding the spinning cake onto a yarn carrier to form a spinning cop.

Abstract: A method of producing a spinning cop in a pot spinning machine includes depositing yarn from a yarn guide onto an upper location of an interior of a spinning pot of the pot spinning machine to form an upper yarn deposit in the upper location; further depositing yarn from the yarn guide onto an area of the interior of the spinning pot spaced from the upper location to form a spinning cake spaced from the upper yarn deposit; and rewinding the spinning cake onto a tube to form a spinning cop and rewinding the upper yarn deposit onto the tube to form a top winding. Yarn forming the upper yarn deposit has a coarser yarn size than the yarn forming the spinning cake. During yarn deposit to form the upper yarn deposit the yarn guide is moved in one direction without traversing movement, and during yarn deposit to form the spinning cake the yarn guide is moved in one direction with traversing movement. Yarn windings are placed in parallel relation in the upper yarn deposit.

Abstract: A device for holding and releasing bobbin tubes in a pot spinning frame. A bobbin tube holding body has a longitudinal axis, an interior passage along the axis, and a lower end, with the lower end having an outer surface and being adapted to fit within a bobbin tube. A yarn guide for pot spinning is moveably mounted in the passage of the bobbin tube holding body for movement with respect to the bobbin tube holding body along a predetermined path aligned with the axis. A plurality of gripping elements are disposed at the lower end of the bobbin tube holding body concentrically with respect to the axis, and each of the gripping elements are moveable between an extended position extending radially outward of the outer surface of the lower end of the bobbin tube holding body for gripping engagement of the bobbin tube, and a retracted position radially inward of the outer surface out of gripping engagement with the bobbin tube.

Abstract: A pot spinning method and apparatus wherein a spinning pot rotates during spinning about a vertical axis while an associated yarn guide tube delivers fiber material through an exit mouth of the yarn guide tube onto the rotating inside surface of the spinning pot in the form of a revolving extent of the yarn which also rotates about the axis of the spinning pot. A yarn break or unacceptable changes in quality of the spun yarn can be ascertained extraordinarily quickly if deviations in the duration of the revolution of the yarn extent at the mouth of the yarn guide tube are monitored.

Abstract: A vacuum centrifuge has a cylindrical centrifuge housing forming a vacuum chamber and a cylindrical centrifuge pot is coaxial with the vacuum chamber. An elongated hollow shaft extends externally and coaxially from the cylindrical centrifuge pot and forms a passage for an elongated thread carrier tube extending into the pot. At least one magnetic bearing and a motor surround the elongated hollow shaft. An annular wall connects a terminal end of the elongated hollow shaft to the cylindrical centrifuge pot and forms a boundary surface within the vacuum chamber in which the centrifuge pot is located.

Abstract: A pot-spinning machine is equipped with a rewinding tube mounted on each yarn guide and with a central, common shogging drive of the yarn guides at one side of the machine. After a yarn break or similar interruption in spinning, in order to be able to initiate the rewinding operation immediately at the affected spinning station while simultaneously continuing the spinning process unchanged at the neighboring spinning stations, the shogging motion of the yarn guide is separated from the motion of the rewinding tube supported on the yarn guide, so that the rewinding tube is then moved only at the forward indexing speed of the yarn guide which is relatively slow compared with the shogging speed and which does not affect the rewinding of yarn onto the rewinding tube.

Abstract: A pot spinning machine holds a yarn rewinding tube in ready position during the spinning operation for immediate movement to an operative rewinding position in the event of a yarn break so that the broken end of yarn is not lost by winding onto the yarn cake already formed in the spinning pot and the yarn cake may then be properly rewound. The yarn break is detected with the aid of a yarn sensor which then emits a signal for immediately moving the rewinding tube into the rewinding position and clamping the yarn end. The rewinding operation can begin, even in the absence of a loose end of the yarn, if the yarn has assumed the form of a chord-like yarn segment extending substantially in the circumferential direction against the inner face of the yarn cake deposited onto the inside wall of the pot, which can be grasped and utilized to initiate the rewinding operation.

Abstract: A method for rewinding a spinning cake from a spinning pot of a pot spinning apparatus onto a rewinding body, preferably onto a tube as a yarn carrier, includes drawing a sliver to be spun in a drafting configuration, guiding the sliver in a pneumatic piecing aid, and depositing the sliver with a traversing yarn guide onto an inner wall surface of the rotating spinning pot as the spinning cake, while maintaining a requisite rotation for formation of a yarn. A yarn guide is moved toward the middle of the spinning cake in a last stroke being shorter than a next-to-last stroke of the yarn guide toward the middle of the spinning cake, once a predetermined size of the spinning cake is reached, before initiating rewinding of the spinning cake onto the rewinding body. A delivery of the sliver from the drafting configuration is stopped once a reversing point of the stroke is reached. The rewinding body is introduced into the spinning pot and the yarn is transferred onto the rewinding body.

Abstract: Because of the pot spinning process, it is more difficult to automate the supply of empty tubes, respooling of the spinning cake on an empty tube, and the removal of the spinning cops in a pot spinning machine than with other spinning processors. The present invention provides a completely automatic exchange of spinning cops for empty tubes at the spinning stations of a pot spinning machine by utilizing the yarn guides of pot spinning stations to place full yarn cops produced thereat into an upright position on carriers located on a movable conveyor extending underneath the spinning pots. With the spinning cops deposited onto the conveyor and with the yarn guide returned to a spinning position, the conveyor can transport the carriers with the spinning cops away and can deliver empty tubes to the spinning stations for receipt by the yarn guides to continue the spinning process.

Abstract: In the spinning unit of a centrifugal spinning machine the yarn conduct (4, 5) mounted between the revolving tube (2) and the yarn spreader (8) is designed so as to open on the side of the rewinding unit consisting of a winding drum (17) and a cartridge holder (18). The yarn conduct opens without displacement of the yarn (28) from its longitudinal axis. This allows to reduce the friction of the yarn (28) against the wall of the yarn conduct (4, 5) during the spinning process and to reduce the friction of the yarn (28) against the wall and the upper end of the spreader (8) during the rewinding process, as well as to bring the rewinding unit closer to the spinning unit.

Abstract: A pot spinning device is disclosed for spinning textile yarn in which the spinning pot has an inner wall and the pot is driven by a magnetic bearing device for rotating the spinning pot. The magnetic bearing device provides radial and axial support of the pot. The magnetic bearing device may comprise at least one electromagnet disposed at each end of the spinning pot. At least the ends of the spinning pot may be formed of a magnetic material positioned to interact with the magnetic bearing device. The magnetic material may be formed as an annularly magnetic portion at each end. At least one sensor may be connected to the magnetic bearing device for detecting a displacement of the spinning pot. The magnetic bearing device may have a control device for stabilizing the position of the spinning pot against displacement due to exterior forces. The spinning pot may comprise a rotor of the electric motor. The electric motor may include an annular rotor on the spinning pot.

Abstract: A pot spinning assembly comprises a spinning pot and a yarn guide extending into the spinning pot. A controlled drive causes a relative motion between the spinning pot and the yarn guide during a spinning process. Yarn is deposited in layers on the inner wall of the spinning pot and a spinning cake is formed. The spinning pot is displaced along its longitudinal central axis between an upper end position and a lower end position. An outlet opening of the yarn guide is located in the vicinity of the lower edge region of the spinning pot when it is in the upper end position. A yarn holder for receiving yarn from the spinning pot, and a substantially horizontal transport apparatus for moving the yarn holder to the spinning pot for rewinding the spinning cake onto the yarn holder is provided. The transport apparatus moves the yarn holder away from the spinning pot when it is in the upper end position.

Abstract: A method of twisting a feed yarn of little strength, which is wound under little tension on a winding tube into a yarn package, wherein the wound yarn package with the winding tube is inserted into a spindle pot, the spindle pot is put in rotation, the winding tube is subsequently pulled out of the yarn package, and the feed yarn is then withdrawn from the inside surface of the yarn package and wound to a package or twist package.

Abstract: A device for loading and unloading a rotating basket in a centrifuge for spin drying bobbins of yarn wherein a hub is provided centrally of the basket and which guides an annular bearing plate which is vertically shiftable with respect to the basket so as to be selectively engageable with and supportive of a bobbin of yarn which is lowered into the basket, subjected to centrifugal action, and thereafter raised to a discharge position above the basket.

Abstract: In known spinning pots the barrel has an integral base and while the barrel portion may withstand stresses caused by centrifugal forces exerted by the wet cake expanding, the flat bottom base is unable to do so. When discarding the pot, the base also has to be discarded. The present invention provides a spinning pot in which the base is formed separate from a cylindrical barrel and the two are connected by a locating driving spigot. Additionally the base is provided with a bushing in two parts, the wearing part is removably fitted on the main part which is integral with the base.

Abstract: A mounting for a shaft of a tool rotating at high speed comprises a rotatably journaled tube with an axial bore of a diameter exceeding that of the tool shaft. The latter is held in that bore by resilient inserts, such as soft springs or O-rings, whose elasticity coefficient is so chosen that the shaft has a critical speed well below the operating speed of the tool. A locking device, preferably actuated automatically by a speed sensor, consolidates the shaft with the tube until the system surpasses the critical speed.

Abstract: Process and apparatus are herein described for shearing and alternatively directing a continuously produced strand into or away from a strand collection device, particularly a pot spinning device. The novel apparatus is located between a strand producing unit and a collection unit and includes an elongate upright funnel with a transverse slide at the lower outlet of the funnel. The slide carries a straight tubular section and an angular tubular section, with a cut-off blade between the sections. The slide is reciprocated to bring either of the two sections into register with the outlet of the funnel, with the blade serving to sever the strand as the slide is moved to either position. When the staight section is in register, the strand enters the collection unit. When the angular section is in register, the strand is diverted away from the collection unit. The device is particularly used when operation of the collection unit is interrupted while allowing strand production to continue.

Abstract: A method and apparatus for doubling and twisting a material yarn by a two-step changeover system by utilizing a pot twisting and winding device is disclosed. To produce a doubled and twisted yarn having a yarn configuration of two component yarns forming the yarn in a balanced condition, when the second step operation is carried out so as to double a primary twisted yarn of a yarn package formed in the pot by a first step operation with a yarn fed from a supply source and twist this doubled yarn while eliminating the primary twists imparted to the material yarn, the position of the bottom end of the traverse tube in the pot must be controlled so as to satisfy a particular condition D.sub.2 .gtoreq. L.sub.2, where D.sub.2 represents an inside diameter of the full size yarn package formed in the pot by the first step operation, while L.sub.2 represents a distance between the bottom end of the traverse tube and an inside bottom surface of the pot.