Abstract: The invention is to create a n arrangement for controlling and monitoring a switching installation which can be produced in a relatively cost-effective manner. To this end, the arrangement comprises a station control computer system into which the functions of at least one process control appliance and at least on protective appliance are integrated. Furthermore, the arrangement also comprises devices used to digitally control switches of the switching installation and comprising digital inputs and outputs, and an electronic conversion system arranged close to the switches and provided with digital outputs. The digital inputs and outputs of the devices for digital control and the digital outputs of the electronic conversation system are directly connected to the station control computer device by means of communication connections.

Abstract: The aim of the invention is to create an arrangement (1) for controlling and monitoring a switching installation (2) which can be produced in a relatively cost-effective manner. To this end, said arrangement comprises a station control computer system (4) into which the functions of at least one process control appliance and at least one protective appliance are integrate. Furthermore, the arrangement also comprises devices (6,7) used to digitally control switches (10,11) of the switching installation (2) and comprising digital inputs and outputs (10,11), and an electronic conversion system (12) arranged close to the switches and provided with digital outputs (13). The digital inputs and outputs (8,9) of the devices (6,7) for digital control and the digital outputs (13) of the electronic conversion system (12) are directly connected to the station control computer device (4) by means of communication connections (5).

Abstract: The compounds sorbicillacton A and sorbicillacton-A-derivatives of the general formula I are described, as well as methods for their production. Sorbicillacton A and sorbicillacton-A-derivatives, in cellular culture models, exhibit antitumour- and antiviral properties. Furthermore, sorbicillacton A has inflammation inhibiting properties. Finally, the synthesis of sorbicillacton A and its derivatives is described.

Abstract: Implants and methods of making same are provided for treatment or prophylaxis of coronary or peripheral vascular constrictions or vascular occlusions, and particularly, stenoses or restenoses, that comprise FK506 in chemically covalently bound, non-covalently bound or physically immobilized form.

Abstract: A piston-type quantity meter including a metering chamber having a bottom, a cylindrical chamber shell, a cover, a central journal, a guide ring, two inlet opening formed, respectively, in the chamber bottom and the chamber cover, and a radial outlet opening formed in the chamber shell, an annular piston located in the chamber interior and having a cylindrical piston skirt, guide slot means formed in the piston skirt and corresponding to a width of separation wall located in the metering chamber for pinning the piston on the separation wall, and a radial outlet opening associated with the outlet opening formed in the chamber shell, and a seal strip for sealing at least one of a slit formed between the inner surface of the chamber shell and an outer surface of the annular piston, and a slit formed between the inner surface of the piston and the guide ring.

Abstract: A self-oscillating buck converter includes a controllable switch, a device for controlling the controllable switch, a device for sensing the output voltage of the buck converter, a device for sensing the output current of the buck converter, and a device for sensing the input voltage of the buck converter. The control device controls the controllable switch in such fashion that the output current level varies in dependence upon the output voltage and the input voltage.

Abstract: A piston-type quantity meter including a metering chamber having a bottom, a cylindrical chamber shell, a cover, a central journal, a guide ring, two inlet opening formed, respectively, in the chamber bottom and the chamber cover, and a radial outlet opening formed in the chamber shell, an annular piston located in the chamber interior and having a cylindrical piston skirt, guide slot means formed in the piston skirt and corresponding to a width of separation wall located in the metering chamber for pinning the piston on the separation wall, and a radial outlet opening associated with the outlet opening formed in the chamber shell, and a seal strip for sealing at least one of a slit formed between the inner surface of the chamber shell and an outer surface of the annular piston, and a slit formed between the inner surface of the piston and the guide ring.

Abstract: An oscillating flowmeter including a measuring chamber having a bottom, a cylindrical jacket, a central journal, a guide ring, a separating wall, and inlet and outlet openings, and a piston located in the measuring chamber and having a bottom, a cylindrical skirt, at least one pilot journal engageable with and rotatable about the central journal of the measuring chamber, and a guiding slot extending in the skirt and the bottom and up to separating wall of the measuring chamber, with at least one of the central journal of the measuring chamber and the pilot journal of the piston being formed as a resiliently pliable member.

Abstract: The invention is directed to an electrical device in which an electrical load is powered by a battery via an electronic switching device. A display means serves the function of indicating the charge status of the battery, and a time measurement means determines the connection time of the load to the battery. Following expiration of a predetermined connection time of the load to the battery, when the display means indicates the charge status "zero", the time measurement means will disconnect the electrical load from the battery by means of the electronic switching device.

Abstract: The invention is directed to an electronic switched-mode power supply for supplying power to an accumulator (61), comprising a self-oscillating flyback converter having a transformer (50), a switching transistor (1) with an emitter resistor (22) and a feedback circuit (11, 27). A control circuit (St) inhibits conduction of the switching transistor (1) when the switching voltage at the accumulator (61) has reached a predetermined upper level (A). A switching arrangement (SE) lowers the upper switching voltage (A) to a lower switching voltage (B) when, with the switched-mode power supply in the pulsed mode, the ratio of the duration of oscillation pauses to the duration of oscillation bursts exceeds a specified magnitude.

Abstract: A circuit arrangement for indicating the charge status of a batter in an electrical appliance includes a voltage comparator with hysteresis which detects the battery voltage, an oscillator driven by the voltage comparator, and an indicating device. The oscillator oscillates when the voltage is above a first threshold voltage and switches the indicating device to an active condition. The oscillator is blocked when the voltage is below a second threshold voltage and switches the indicated device to a passive condition.

Abstract: The invention is directed to an electrical device in which an electrical load is powered by a battery via an electronic switching device. A display means serves the function of indicating the charge status of the battery, and a time measurement means determines the connection time of the load to the battery. Following expiration of a predetermined connection time of the load to the battery, when the display means indicates the charge status "zero", the time measurement means will disconnect the electrical load from the battery by means of the electronic switching device.

Abstract: A circuit arrangement for automatically decreasing the load current includes a series arrangement formed by a load and a first electronic switching device and connected to a DC source of power. The first switching device is driven by a driver. The circuit further includes a control circuit controlling the driver. The control circuit is adapted to be initiated by a second electronic switching device, so that the second electronic switching device connects the first terminal of a capacitor and of a first resistor as well as the base of a transistor to one pole of the DC source of power, with the main current path of the transistor being between the input of the driver and the other pole of the DC source of power. The second terminal of the capacitor and of the first resistor is coupled to the other pole of the DC source, and the end of the first electronic switching device connected to the load is coupled to the second terminal of the capacitor through a feedback resistor.

Abstract: In a circuit arrangement to detect a voltage (U), the voltage is applied to the input of a voltage detector (VD) through a voltage divider (R1, R4), the voltage detector (VD) comprising a Schmitt-Trigger with reference voltage and an output driver. The output signal of the voltage detector (VD) is applied to the base of a transistor (T1) whose collector-emitter circuit, together with a series-connected capacitor (Cl), is connected in parallel with the voltage (U) to be detected. The junction of the capacitor (C1) and the transistor (T1) is connected to the input of the voltage detector (VD) through a resistor (R5, R6). The output of the voltage detector (VD) is further applied to the input of a component (C) delivering different output signals in dependence upon whether its input receives a constant signal level or a varying signal level.

Abstract: p-Oxybenzoic acid derivatives of the general formula (1) ##STR1## their physiologically compatible salts and their enantiomeric and diastereomeric forms have hypolipemic properties and are therefore suitable for the preparation of drugs with hypolipemic action.

Abstract: The invention relates to p-oxibenzoic acid derivatives of the general formula (1) where: ##STR1## their diastereomers and enantiomers in pure form or as mixture of stereoisomeric forms and their physiologically compatible salts, a process for the preparation thereof and the use thereof for preparing drugs with hypolipemic effect.

Abstract: The invention is directed to a discharge indicating means for a storage battery (B) in which a choke (L) and a first transistor (T1) are connected to the storage battery via a switching device (S). The base of a second transistor (T2) arranged between the base of the first transistor (T1) and reference potential is controlled such that the circuit arrangement will start oscillating and an indicating device connected in parallel with the first transistor (T1) will light when the battery voltage (UB) has dropped below a predetermined threshold.

Abstract: The subject of the invention is a circuit for monitoring the charge state of a battery for supplying voltage to an electrical consumer through a mode selector switch which may be switched from an OFF-state for disconnecting the electrical consumer from the battery into an ON-state for connecting the electrical consumer with said battery whereby in said ON-state different modes of operation of said electrical consumer are possible. The charge state of the battery is determined when the mode selector switch is in the ON-state and, when the voltage drops below an adjustable threshold value, an acoustic and/or optical indication is triggered after the electrical consumer is switched off. The circuit in the ON-state consumes only a very slight amount of energy and no additional energy in the OFF-state. In addition to the mode selector switch for switching the electrical consumer on and off, no battery test button or additional battery test position of the mode selector switch is required.

Abstract: A battery charging circuit having an electromagnetic transformer with primary and secondary coils, a rectifier connected between the secondary coil and the battery, a first transistor connected in series with the primary coil and a resistor to form a circuit in parallel with a power source, the base of the first transistor being connected to the secondary coil, and a second transistor electrically connected to the base of the first transistor. The first transistor has a high switching frequency, and the battery is charged with a constant reverse current during its blocking phase, regardless of the power source voltage. The first transistor is protected from reverse kick-back voltage pulses induced during its blocking phase by the provision of a diode and Zener diode connected in series across the primary coil and a capacitor interposed between the secondary coil and the base of the first transistor.