Abstract: The invention relates to a signal amplifier circuit for amplifying a signal, in particular an audio amplifier circuit, includes at least one first amplifier transistor (Q1) and at least one second amplifier transistor (Q2), wherein the first amplifier transistor (Q1) and the second amplifier transistor (Q2) are connected to one another in a push-pull circuit and are fed by an amplifier voltage source (V+, V?); and one or more bias diodes (D1, D2) thermally coupled in each case to an associated amplifier transistor (Q1, Q2), wherein the bias diodes (D1, D2) are arranged in a parallel connection with respect to the amplifying transistors (Q1, Q2) to reduce or avoid a crossover distortion, wherein the bias diodes (D1, D2) are fed at least partly by a voltage source (UA) which is independent of the amplifier voltage source (V+, V?).

Abstract: The invention relates to a signal amplifier circuit for amplifying a signal, in particular an audio amplifier circuit, includes at least one first amplifier transistor (Q1) and at least one second amplifier transistor (Q2), wherein the first amplifier transistor (Q1) and the second amplifier transistor (Q2) are connected to one another in a push-pull circuit and are fed by an amplifier voltage source (V+, V?); and one or more bias diodes (D1, D2) thermally coupled in each case to an associated amplifier transistor (Q1, Q2), wherein the bias diodes (D1, D2) are arranged in a parallel connection with respect to the amplifying transistors (Q1, Q2) to reduce or avoid a crossover distortion, wherein the bias diodes (D1, D2) are fed at least partly by a voltage source (UA) which is independent of the amplifier voltage source (V+, V?).

Abstract: The invention relates to a signal amplifier circuit for amplifying a signal, in particular an audio amplifier circuit, includes at least one first amplifier transistor (Q1) and at least one second amplifier transistor (Q2), wherein the first amplifier transistor (Q1) and the second amplifier transistor (Q2) are connected to one another in a push-pull circuit and are fed by an amplifier voltage source (V+, V?); and one or more bias diodes (D1, D2) thermally coupled in each case to an associated amplifier transistor (Q1, Q2), wherein the bias diodes (D1, D2) are arranged in a parallel connection with respect to the amplifying transistors (Q1, Q2) to reduce or avoid a crossover distortion, wherein the bias diodes (D1, D2) are fed at least partly by a voltage source (UA) which is independent of the amplifier voltage source (V+, V?).

Abstract: The invention relates to a signal amplifier circuit for amplifying a signal, in particular an audio amplifier circuit, includes at least one first amplifier transistor (Q1) and at least one second amplifier transistor (Q2), wherein the first amplifier transistor (Q1) and the second amplifier transistor (Q2) are connected to one another in a push-pull circuit and are fed by an amplifier voltage source (V+, V?); and one or more bias diodes (D1, D2) thermally coupled in each case to an associated amplifier transistor (Q1, Q2), wherein the bias diodes (D1, D2) are arranged in a parallel connection with respect to the amplifying transistors (Q1, Q2) to reduce or avoid a crossover distortion, wherein the bias diodes (D1, D2) are fed at least partly by a voltage source (UA) which is independent of the amplifier voltage source (V+, V?).

Abstract: An insulation stripping tool for flat cables includes a clamping device adapted to be clamped to a flat cable and to provide a linear guide edge for guiding a knife holder to accurately sever the outer insulation sheath of the cable in a transverse direction. Upon removal of the clamping device from the cable, the knife holder is inserted into a chamber contained in the clamping device with the knife edge protruding from the chamber, whereupon a curved side of the flat cable is inserted within first guide grooves contained in the clamping device, and the clamping device is displaced circumferentially of the cable to sever the curved cable side transversely of the cable. The curved cable side is then inserted into a second pair of grooves contained in the clamping device, and the knife holder is displaced longitudinally to sever the insulation sheath longitudinally of the cable.

Abstract: An insulation stripping tool for flat cables includes a clamping device adapted to be clamped to a flat cable and to provide a linear guide edge for guiding a knife holder to accurately sever the outer insulation sheath of the cable in a transverse direction. Upon removal of the clamping device from the cable, the knife holder is inserted into a chamber contained in the clamping device with the knife edge protruding from the chamber, whereupon a curved side of the flat cable is inserted within first guide grooves contained in the clamping device, and the clamping device is displaced circumferentially of the cable to sever the curved cable side transversely of the cable. The curved cable side is then inserted into a second pair of grooves contained in the clamping device, and the knife holder is displaced longitudinally to sever the insulation sheath longitudinally of the cable.

Abstract: An apparatus for the inspection of the surface (1) of a tire (2) or the like comprises a projector (3) for the projection of a pattern onto the tire (2) and a camera (4) for the taking of an image of the pattern projected onto the tire. A simplified apparatus of this type comprises an apparatus for the rotation of the tire (2) about its axis (5).

Abstract: An apparatus for the inspection of the surface (1) of a tire (2) or the like comprises a projector (3) for the projection of a pattern onto the tire (2) and a camera (4) for the taking of an image of the pattern projected onto the tire.

Abstract: In order to provide an easily usable string holder for a musical instrument with a holding body, on which a holding device for strings of the musical instrument is disposed and which is provided with an attachment element forming an attachment bow for fixing the holding body to the musical instrument, it is proposed that an adjusting device for adjustment of the distance of an attachment bow apex of the attachment element from the holding body be disposed on the holding body, and that the adjusting device be constructed to be operable from outside the holding body.

Abstract: Components for transmitting ATM cells related to Internet data packets are additionally integrated in an ATM communications system for transmitting data and data packets packed in ATM cells for ATM communications networks which are formed by ATM communications systems. The complete integration of the Internet transmission function into ATM communications systems results in effective traffic and network management of ATM cells related to Internet data packets with a very low level of integration complexity.

Abstract: In order to provide an easily usable string holder for a musical instrument with a holding body, on which a holding device for strings of the musical instrument is disposed and which is provided with an attachment element forming an attachment bow for fixing the holding body to the musical instrument, it is proposed that an adjusting device for adjustment of the distance of an attachment bow apex of the attachment element from the holding body be disposed on the holding body, and that the adjusting device be constructed to be operable from outside the holding body.

Abstract: In a hydraulic power steering for a motor vehicle with a hydraulic servomotor and a servovalve arrangement in communication with opposite servomotor actuating chambers by way of separate communication conduits through which the actuating chambers can be pressurized or depressurized for the operation of the servomotor depending on a force applied by an operator to a steering means, the communication conduits include valve arrangements permitting, when they are open, the release of hydraulic fluid from the actuating chambers but blocking the release of hydraulic fluid when they are closed thereby hydraulically locking the power steering.

Abstract: In a servo valve for hydraulic power steerings of motor vehicles which consists of a rotary spool valve having a rotary spool rotatably disposed in a control sleeve, a front end of the control sleeve and a flange structure on the rotary spool have spaced oppositely arranged faces forming a gap therebetween in which a C-shaped spring is disposed which extends around the rotary spool and has free opposite ends in engagement with pins projecting axially toward one another from the opposite faces of the control sleeve and the flange structure when both are in a center position relative to one another so as to bias the control sleeve and the flange structure into such center position with a predetermined spring force.

Abstract: Transmission of the message packets according to asynchronous transfer mode ensues separately on at least two completely different transmission paths having ATM switching equipments (ASW1 . . . , ASW2 . . . ) or ATM cross-connectors (ACC1 . . . , ACC2). An acquisition of test message packets transmitted at the transmission side and switched on the different transmission paths ensues on the basis of an interface controller unit (CCU) located at a respective subscriber of the network. Compensation is provided of the differences in running time of the message packets caused by the different transmission paths on the basis of the reception points in time. One of a plurality of identical message packets transmitted on the different transmission paths is output to a subscriber.

Abstract: Apparatus for operating needles of a textile machine includes magnetically operated control flaps for operating the needles, and magnetic controls operable to actuate the control flaps. The control flaps include a flap structure and an armature disposed on the flap structure, the magnetic controls being operable to magnetically actuate the armature to thereby effect movement of the flap structure, whereby the movement of the flap structure actuates the needles.

Abstract: Three-stage, at least doubled ATM switching network. A method for expanding a three-stage, stretched and at least doubled ATM self-routing switching network, the switching matrices of the second switching stage can be respectively doubled in one redundancy level after another without interrupting operation given a simultaneous, respective halving of the plurality and filling of link groups formed from the very outset and proceeding between the first switching stage, the second switching stage and the third switching stage, of which link groups only links of one and the same group of links are occupied for every connection lasting during an expansion of the switching network.

Abstract: Two-stage, at least doubled ATM reversing switching network having (2n.times.2n) switching matrices. For expanding a two-stage, doubled ATM self-routing reversing switching network, the switching matrices of the B switching stage can be respectively doubled in one redundancy level after another without interrupting operation given a simultaneously, respective halving of the plurality and filling of duplex link groups formed from the very outset and proceeding between A-switching stage and B-switching stage, of which duplex link groups only duplex links of one and the same group of links are occupied for every connection lasting during an expansion of the switching network.

Abstract: A biological reactor which is operated using microorganisms and/or enzymes and used for the oxidative conversion of organic compounds, and in which the organic compounds to be converted are employed in the presence of a biocatalyst in the reactor space (4) (anode space) and the enzymes are regenerated at a polarized electrode (1), the polarization of the electrode (1) being effected by means of a catalyst electrode (2) which is separated from the reactor space (4) by a polyelectrolyte (3) and is located in an electrolyte space (5), wherein the electrode (1) is prepared from an electrically conductive carbon material which has been partially oxidized on the surface at a potential .epsilon..sub.h of from +1.3 to +10 V in an aqueous oxygen-containing mineral acid.

Abstract: Compounds of the formula I ##STR1## and of the formula II ##STR2## where R.sup.1 is unsubstituted or substituted alkyl, unsubstituted or substituted alkenyl, or alkynyl, R.sup.2 is alkyl or alkenyl and X is an acid radical, and the salts of the compounds of the formula I, and fungicides which contain these compounds.

Abstract: A polarized, reversible magnet with an essentially U-shaped yoke includes an upper coil former flange constructed like a frame and which fronts on yoke legs provided with tab-like integral moldings which in turn engage recesses of the upper coil former flange. Permanent magnets and pole pieces are inserted from above through appropriate openings of the upper coil former flange into the magnetic system.