Abstract: The invention relates to an apparatus for forming a sliver with a first regulated drafting arrangement (10) with several pairs of rollers (11, 12, 14) for the regulated drafting of the fibre mass (8) supplied to the drafting arrangement, with the fibre fleece (28) delivered by the drafting arrangement being joined and supplied to a measuring member (32) from where the measured fibre material is thereafter supplied to a second drafting arrangement (40) and with the autoleveller device (35, 52, 21) of the first drafting arrangement (10) intervening in a regulating manner in the drive of the first drafting arrangement (40) in order to compensate fluctuations in mass on the basis of the signals issued by the measuring member (32) by including a predetermined setpoint value.Various regulating and control devices are known in practice in order to obtain a high-quality sliver.

Abstract: A pump of compact design, which is hermetically sealed to the outside and has no shaft lead-outs to the outside, includes a housing with an internal partition dividing the inside of the housing into a drive section and a pump section. A single shaft, which is supported in the partition, carries on one side the rotor of an electric drive motor and on the other side the impeller of the pump. In the cavity of the drive section, a gas pressure is generated which assists in preventing the pumping material from passing into the drive section.

Abstract: A device having cores of metal oxide ceramic (for example, Y-Ba-Cu-O) for limiting a short circuit current in power supply systems. The concept provides that a choke core, when operated at a rated current, is superconductive and its shielding currents keep the resulting inductance in the choke at a low level. In the event of an overload, the winding of the choke generates a correspondingly high magnetic field in the core which puts the core into the normally conducting state. This causes the shielding currents to disappear in connection with a rise in the resulting inductance, thus limiting the current. In order to realize a particularly high inductance in the normally conductive case, the superconductive choke core may be made hollow and may be filled at least in part with a ferromagnetic material.

Abstract: A game board made of a flexible material, whereby a pocket (28) for receiving the pieces (30) is arranged on a first edge (14) of the game board (10) and the other edges (16, 18, 20) are embodied in the form of pockets (40) with openings (42) for receiving reinforcing bars (44), and whereby provision is made on the respective ends of the edges (14, 16, 18, 20) for closing elements (36) with corresponding locking elements (38) for arranging the edges vertically relative to the game board (10).

Abstract: Compounds of the formula (I) ##STR1## wherein R.sup.1 represents a pyranosyl radical and R.sup.4, R.sup.2, and R.sup.3 are as specified herein, compositions containing the compounds, methods of using the compounds to selectively kill tumor cells, and a process for the preparation of the compounds.

Abstract: Compounds of the formula ##STR1## in which R.sup.1 represents saturated, unsaturated or anhydro desoxypentosyl, desoxyhexosyl or didesoxyhexosyl, where the OH functions of the sugar are optionally protected, andR.sup.2 represents straight-chain or branched or heterosubstituted alkyl having up to ten carbon atoms andR.sup.3 represents straight-chain or branched or heterosubstituted alkyl having up to ten carbon atoms andX represents halogens andR.sup.4 represents straight-chain or branched or heterosubstituted alkyl having up to ten carbon atoms.Such compounds are useful as highly selective cytostatics in cancer therapy.

Abstract: The invention relates to a feed table for feeding slivers by way of a conveyor to a textile processing machine. The slivers are drawn off from associated spinning cans by way of draw-off devices and placed on the conveyor. In the event of a sliver running out or breaking, reserve slivers are fed in automatically by way of draw-off devices specifically devised for this purpose. The conveyor comprises individual conveyor belts associated with each sliver and each reserve sliver and have a draw-off devices, each conveyor belt being drivable by way of a controllable drive, the conveyor belts being a part of the draw-off devices.

Abstract: A thin film solar cell with an n-i-p structure has a roughened substrate surface, and, to achieve an improved fill factor, the substrate surface of the solar cell is a multiply concave surface and has no sharp points.

Abstract: A thin film solar cell with an n-i-p structure has roughened substrate surface and to achieve an improved fill factor, the substrate surface of the solar cell is a multiply concave surface and has no sharp points.

Abstract: An incremental or absolute rotation encoder with a clamping device for connecting the encoder shaft to the drive shaft of a drive unit by means of a radial clamping action. A clamping element with a first sliding surface which is inclined relative to the axis of the encoder shaft is provided resting against a corresponding second inclined sliding surface at the end of the encoder shaft facing the connection with the drive shaft. An actuating element is capable of acting on the clamping element in axial direction. Since the two inclined surfaces rest slidingly on each other, the clamping element and the end of the encoder shaft are pressed in opposite radial directions against the drive shaft.

Abstract: In order to prevent back spraying of fuel after switching-off of a fuel filler nozzle an expansion space is provided at the fuel tank filler neck in the area of the inserted fuel filler tube, expansion space is formed by a widening of the cross-section of the filler tube. The expansion space widens approximately starting from a free end of the fuel filler tube when in the fuel filling position, in upward direction, in a funnel shape and subsequently is returned to the cross-section of the filling collar supporting the filler tube.

Abstract: A fuel filler neck with a vent device is provided for receiving fuel from a dispensing pistol and depositing the fuel into a fuel tank, which fuel filler neck simultaneously allows for optimal utilization of the fuel tank volume and for operationally adequate venting during refueling. The filler neck is formed in one piece with the vent device having a cross-sectional enlargement forming an expansion space. A connecting duct is provided at the area where the expansion space opens into the filler neck and a discharge gap is provided at the area where the vent device enters the filler neck.

Abstract: The invention relates to a process for the synthesis of 1,1'-diacetals, which method is also suitable for the stereoselective synthesis of glycosides with the 1,1'-diacetal structure. The process involves reacting a silyl compound of formula (II) with an acetal of formula (III) in the presence of a catalyst of formula (IV) or (V) in a suitable solvent.

Abstract: An arrangement for transmitting torque between the two rotors of a two stage rotary vane pump, consists of a coupling element, which forms between engagements on opposing faces of the two rotors, a connection which permits two degrees of freedom between the two rotors in the plane perpendicular to the rotor axis.

Abstract: A vacuum pump assembly is provided which includes a built-in pneumatic valve for closing the suction port of a vacuum pump of the assembly with an auxiliary valve being provided for controlling operation of the pneumatic valve. An electromagnetic valve is utilized as the auxiliary valve and a generator coupled with the shaft of the vacuum pump generates electric current in accordance with the operating stages of the pump in order to control the auxiliary valve.