Abstract: A method and apparatus for the simultaneous freeing of yarn at a group of cops during the changing of cops in a spinning machine having spindles without appendages, the machine including a yarn guide rail carrying yarn guides which grip the yarn from the side and means supporting the guide rail for downward movement from the region above the spindles toward the foot of the spindles, wherein the yarn guide rail is employed as the yarn freeing rail and downward movement of the yarn guide rail is effected by initially rotating the rail through 90.degree. about an axis extending in the longitudinal direction of the rail so that the yarn guides are pivoted downwardly, and subsequently lowering the yarn guide rail toward the foot of the spindles.

Abstract: In a ring spinning machine, for preventing the presence of a loose yarn end lying on the yarn upstream of the traveler upon resumption of spinning after a full bobbin is replaced by an empty bobbin on the spindle, the ring rail, while the spindle is stationary, is raised to a position above the spin-start position and thereafter the rotation of the spindle is restarted for initiating a normal cop building operation, during the course of which the ring rail is reciprocated between the spin-start position and a highest spinning position.

Abstract: A crushing implement on rubber tire equipped wheels in which the understructure of the implement can selectively be lifted off the ground hydraulically while resting on the wheels or can be rested on the ground, preferably at three points, while the wheels are lifted off the ground. The implement is equipped with hydraulic pump means for supplying the driving fluid for driving at least some of the wheels and also for supplying actuating fluid to hydraulic cylinder-piston systems for lifting and lowering the understructure, and if desired also to conveyor means for feeding material to be crushed to the crusher rollers of the crushing implement.

Abstract: A sintered hard metal sealing strip particularly for constituting a radial seal in a rotary internal combustion engine, includes a hollow body with longitudinal ends each closed off by a sintered hard metal end face forming part of the hollow body.

Abstract: A cutting tool comprises a tool bit having the configuration of a hollow pyramid which includes an open base and three side walls, each having an outer face. The adjoining outer faces define three cutting edges coverging in the apex of the pyramid. The cutting tool further has a base block with a recess for receiving the tool bit and a clamping device for tightening the tool bit, positioned in said recess, to the base block.

Abstract: In an open-end spinning unit having a spinning rotor presenting an entrance opening, a break-up roller mounted for rotation coaxially with the spinning rotor and having a frontal end section at the end thereof directed toward the spinning rotor, the frontal end section being generally enclosed by the portion of the spinning rotor defining its entrance opening, and a housing enclosing at least part of the break-up roller, there is further provided, in order to improve the guidance of fibers into the fiber collecting trough of the spinning rotor, a fiber collecting ring located between, and coaxial with, the spinning rotor and the break-up roller, and supported by the housing, the fiber collecting ring protruding axially, in the direction away from the spinning rotor, beyond the frontal end section of the break-up roller and, in the direction toward the spinning rotor, beyond the entrance opening of the spinning rotor, with the inner surface of the fiber collecting ring facing the break-up roller and serving at

Abstract: A hollow tubular guiding mast made up of interconnected axial sections and adapted for reciprocably guiding the gripper or charging body for a core reactor. The mast includes reinforcing spars extending axially therein in the form of interconnected flat plates which diverge in the outward direction of the mast. Guide means, such as rollers, are adjustably mounted on the plates and engage angularly related regions of the body to be guided in the mast.

Abstract: In an open-end yarn spinning unit, a break-up roller which is driven by transmission of driving force from the spinning rotor, without mechanical contact between the roller and the rotor, is subjected to a speed regulation by application of a retarding force without mechanical connection between the roller and the source of each retarding force.

Abstract: In apparatus for determining the direction of impinging sound waves according to the sum/difference principle, by forming a sum signal and two difference signals in a gradient ranging system composed of four omnidirectional piezoelectric hydrophones arranged in two pairs oriented orthogonally to each other, the hydrophones of each pair are conductively connected together to form a loop in which each terminal of each hydrophone is connected by a short circuit connection to a respective terminal of the other hydrophone of the same pair and the sum signal is derived by producing a signal proportional to the sum of the currents in the two loops and integrating such signal with respect to time.

Abstract: In a system composed of a plurality of sonar devices mounted on a ship and arranged to operate simultaneously, each device being composed of two units between which electrical signals pass during operation of the device and conductors connected for conveying such signals between the units, the conductors for all of the devices are constituted by a plurality of multiconductor cores, at least one core being associated with each device, and all of the cores are twisted together to form a common spiral multicore cable, whereby the spiral form of the cable produces a low level of cross-talk between the signals in different ones of the cores.

Abstract: A reloading device, e.g. a combined reloading -- loading device, which on one hand so rests on a transfer device movable above a storage place conveyor that the transfer device can carry out pivotal movements about a vertical axis and an axis transverse to the belt bridge axis while being prevented from carrying out longitudinal movements, and on the other hand rests on a carriage by the aid of rocker means which is equipped with rollers as support for supporting rails mounted on the belt bridge and extending approximately in the longitudinal direction of the belt bridge. The supporting rails are mounted on the belt bridge for pivoting about an axis transverse to the longitudinal axis of the belt bridge and are arrestable relative to the belt bridge at such inclinations that the reaction force component acting approximately in the longitudinal direction of the belt bridge and originating in the pick-up means is at least partially transformed onto the carriage.

Abstract: A disc brake arrangement, especially for heavy duty applications in which a pair of brake arms having brake members on the sides facing each other are pivotally supported at one end and spring biased toward each other at the other end. The brake members are adapted to receive the periphery of a brake disc therebetween. A disengaging device is provided which includes a lever pivoted to the free ends of the arms and having a wedge shaped nose which will press the arms apart when the lever is pivoted in one direction and which will cam out between the arms when the lever is released. The brake members are adjustably mounted on the respective arms and each brake member support includes an adjustment, with each adjustment being provided with a free wheeling one way clutch device.

Abstract: A hoisting apparatus mounted on a building structure has parallel-extending upper and lower tracks attached to the building structure and supporting a respective upper and lower traveling block movable thereon by a propelling device, a hoisting cage supported by and between the traveling blocks and a hoisting device for raising or lowering the cage between the traveling blocks.

Abstract: A device, including a gripper, for manipulation of fuel elements and control bars, or rods, in a core reactor in which a vertical mast is provided in which the gripper is nonrotatably reciprocable. The mast is rotatable on a work platform and latch elements are provided to halt the mast in selected rotated positions on the platform. Abutment means are also provided to limit the rotary movement of the mast on the platform to 360.degree..

Abstract: A flat composed of a flat body with a flexible covering fastened thereto and having a plurality of outwardly extending card wires distributed across the covering, for use in carding machines, is produced by disposing such a flexible covering against the outer surface of a cylinder with the outwardly extending wires directed toward the cylinder surface, the outer surface of the cylinder being shaped to define the desired contour of the array of card wire tips; pressing the flexible covering against the outer surface of the cylinder for causing the array of card wire tips to conform to the shape of the outer surface of the cylinder; disposing an associated flat body at a distance from that surface of the covering which is directed away from the cylinder; and filling the region between the flexible covering and the rigid body with a hardenable plastic mass and permitting the mass to harden and to become firmly attached to the flat body and to the covering.

Abstract: In an open-end spinning unit for producing yarn from fiber material, the unit including a spinning rotor having a circumferential portion extending axially from one axial end face of the rotor to enclose a space in which such yarn is formed and which defines a fiber collection trough, and a fiber guide disc rotatably mounted coaxially of the rotor and having at least a portion disposed within such space, the guide disc is free of physical connection to any drive system and is mounted to be freely rotatable, and the unit further includes a force transmitting arrangement operatively connected between the rotor and the disc for causing the rotation of the rotor to induce rotation of the disc without physical contact between the rotor and the disc.

Abstract: The present invention relates to a) a method for refining metal in which, e.g., oxygen and fine lime are introduced through at least one nozzle disposed below a molten bath surface in the refining vessel and a gas is fed in through one or a plurality of further nozzles associated with each first nozzle and to b) an apparatus for practicing the method.

Abstract: A gripping device for gripping and moving control bars and fuel elements in core reactors in which a pair of grippers are mounted on one end of a gripper housing with independent actuators for the grippers in the housing. A lost motion connection between the housing and a lifting device is employed to lock the gripper in gripping position during raising and lowering movements of said housing while permitting selective operation of said grippers in lowered position of said housing.

Abstract: A gripping and lifting device, especially for use with fuel elements and control rod means in a nuclear core reactor in which a carriage having a winch thereon supports a mast beneath the carriage in which is slidable a tubular body within which, in turn, is slidable a housing. Cables lead from the winch to the first body for vertical movement thereof while the housing has limited axial movement in the aforementioned body. On the lower end of the housing are two gripper devices, one for engagement with the control rods and the other for engagement with the fuel element. Separate actuators are provided for the two grippers and sensing devices are included in the structure for sensing the positions of the grippers. A feature of the arrangement is that when the body is elevated and the housing moves downwardly therein to a stopped position, the gripper for the fuel element is locked in its respective position.

Abstract: A device for measuring the gap between the rollers in a roller stand for developing a value for use in controlling the gap in which the device comprises respective relatively moveable elements connected to half bearings engaging the shafts of a pair of opposed rollers. The half bearings are pressed outwardly into engagement with the shafts and at least one of the aforementioned elements is adjustably connected to the respective half bearing.