Abstract: The invention relates to a shut-off fitting comprising a housing which is connected to an adjacent pipeline in a pressure tight manner, the diameter of said pipeline defining a tubular passage in the housing. Said fitting also comprises at least one closing body which can be displaced between an open position and a closed position. The inventive shut-off fitting is characterized in that the at least one closing body can be displaced by an articulated mechanism, by means of an actuator which can be vertically displaced in relation to the flow direction, in such a way that it is arranged outside the tubular passage in its open position. The closing body has a contour which is adapted to the contour of the tubular passage, in the open position, and is located on the tubular passage in a radially sealing manner.

Abstract: The present invention relates to compounds of the general formula (1) and salts and physiologically functional derivatives thereof, wherein R1 is independently hydrogen; alkyl, cycloalkyl, hydroxyalkyl, haloalkyl, haloalkyloxy, aryl, substituted aryl, heteroaryl, substituted heteroaryl, arylalkyl or substituted arylalkyl; R2 is independently —NR3R4, R3 is independently alkyl, cycloalkyl, alkoxy, alkylamine, —OH, —SH, alkylthio, hydroxyalkyl, haloalkyl, haloalkyloxy, aryl or heteroaryl, R4 is independently alkyl, cycloalkyl, alkoxy, alkylamine, alkylthio, hydroxyalkyl, haloalkyl, haloalkyloxy, aryl or heteroaryl; R5 is independently H, COR6, CO2R6, SOR6, SO3R6, alkyl, cycloalkyl, alkoxy, —NH2, alkylamine, —NR7COR6, halogen, —OH, —SH, alkylthio, hydroxyalkyl, haloalkyl, haloalkyloxy, aryl or heteroaryl; R6 is independently H, alkyl, cycloalkyl, —NH2, alkylamine, aryl or heteroaryl; R7 is independently H, alkyl, cycloalkyl, alkoxy, —OH, —SH, alkylthio, hydroxyalkyl, aryl, or heteroaryl; p is 0, or

Abstract: The present invention relates to novel compounds of the general formula (I) and salts and physiologically functional derivatives thereof, wherein Z is NH, or CH2 if Y is SO2 Y is C?O, C?S, or SO2 if Z is CH2; A is phenyl or indolyl, N-methyl-indolyl R1 is —CN, wherein the bond between CR3 and CR7 is a single or double bond; m is 0 or 1; n is 0 or 1; p is 0 or 1; and to their use as medicaments.

Abstract: In a circuit arrangement for operating light sources, inexpensive technologies for power factor correction can be used in combination. A resonant capacitor in a reactance network for coupling the light source is of dual design (C51, C52). A degree of freedom is thus produced which makes it possible to optimize the costs of the said circuit arrangement.

Abstract: In a circuit arrangement for operating light sources, inexpensive technologies for power factor correction can be used in combination. Owing to the combination of a dual charge pump and a valley fill circuit it is also possible to adhere to relevant standards for rated current harmonics even at rated powers of over 25 W whilst maintaining low component loading.

Abstract: An apparatus for operating a plurality of discharge lamps is to be designed so as to be more cost-effective. A first current control device, in particular a heat-sensitive resistor having a positive temperature coefficient, is connected in parallel with a first contact device for electrically connecting a first discharge lamp. Furthermore, a second contact device for electrically connecting a second discharge lamp is connected in parallel with a second current control device, the first and second contact devices being connected in series. A defined preheating period for the lamps can therefore be achieved. By using a sequential starting capacitor in parallel with one of the lamps, impermissible load current surges may be avoided.

Abstract: The invention relates to a method for renewing program files of a programmable, mobile telecommunications terminal, according to which the program files are transmitted from a telecommunications network to the telecommunications terminal via the air interface. The aim of the invention is to allow the program files to be renewed in a simple and cost-effective manner and with little effort. To achieve this, the terminal type is determined by the telecommunications network, new program files that exist in devices of the telecommunications network, or are available elsewhere are determined and made available for the identified terminal type and the existing new program files are automatically transmitted to the terminal via the air interface.

Abstract: A device for operating a plurality of discharge lamps (71, 72) is to be fashioned cost effectively. Two lamps (71, 72) are therefore operated in a single load circuit. In the preheating phase, the incandescent filaments (711, 712, 721, 722) are supplied with preheating current either directly or via a transformer (Ls, Lp). The preheating current is controlled via a temperature-dependent resistor (PTC) in such a way that the continuous heating current is greatly reduced over all the filaments during the operation of the lamp.

Abstract: A device for operating a plurality of discharge lamps is to be fashioned cost-effectively. Consequently, two discharge lamps (71, 72) are operated with the aid of one ballast in whose load circuit the heating current for the individual incandescent filaments (711, 712, 721, 722) is transmitted via a heating transformer with three secondary windings (Lhs1, Lhs2, Lhs3). The associated primary winding (Lhp) is located in a coupling-out circuit (30) with the aid of which the required heating energy is coupled out via an inductor (Lres). The heating current can be controlled by means of a temperature-sensitive thermistor (PTC).

Abstract: A device for operating a plurality of discharge lamps (71, 72) is to be fashioned cost effectively. Two lamps (71, 72) are therefore operated in a single load circuit. In the preheating phase, the incandescent filaments (711, 712, 721, 722) are supplied with preheating current either directly or via a transformer (Ls, Lp). The preheating current is controlled via a temperature-dependent resistor (PTC) in such a way that the continuous heating current is greatly reduced over all the filaments during the operation of the lamp.

Abstract: In the case of circuit arrangements for operating gas-discharge lamps (Lp), a charge pump (D5, D6, C31, C32) is often used for the purposes of power-factor correction. If this is the case, poorly igniting lamps (Lp) experience an increase in voltage across a storage capacitor (C1). This is avoided according to the invention by a PTC (KL) in parallel with diodes (D5, D6) of the charge pump.

Abstract: An apparatus for operating a plurality of discharge lamps is to be designed so as to be more cost-effective. A first current control device, in particular a heat-sensitive resistor having a positive temperature coefficient, is connected in parallel with a first contact device for electrically connecting a first discharge lamp. Furthermore, a second contact device for electrically connecting a second discharge lamp is connected in parallel with a second current control device, the first and second contact devices (13, 14; 13a, 14a) being connected in series. A defined preheating period for the lamps can therefore be achieved. By using a sequential starting capacitor in parallel with one of the lamps, impermissible load current surges may be avoided.

Abstract: a protective circuit for a fluorescent lamp includes a third resistor (R3) that bridges a decoupling capacitor (C2), and a fourth resistor (R4) that connects a first reference point (A) to a positive pole of a DC voltage source (UZ), the resistors being selected such that the reference points are at the same potential without the fluorescent lamp inserted.

Abstract: In the case of circuit arrangements for operating gas-discharge lamps (Lp), a charge pump (D5, D6, C31, C32) is often used for the purposes of power-factor correction. If this is the case, poorly igniting lamps (Lp) experience an increase in voltage across a storage capacitor (C1). This is avoided according to the invention by a PTC (KL) in parallel with diodes (D5, D6) of the charge pump.

Abstract: Disconnection device for an electronic operating device for gas discharge lamps. The DC component is evaluated at a coupling capacitor (C5) specifically via a filament. Disconnection is performed in the event of filament breakage. In addition, the AC component of the generator output (O) can be monitored via a second filament, and disconnection can therefore also be performed in the event of breakage of the second filament.

Abstract: The present invention relates to a protective circuit for a fluorescent lamp (LA) with a first and a second lamp filament (W1, W2), a DC voltage source (UZ) with a positive and a negative pole, a half-bridge arrangement with a first and a second switch (S1, S2), the half-bridge arrangement being fed by the DC voltage source (UZ), and the first and the second switch (S1, S2) being interconnected to form a first reference point (A), the first reference point (A) being connected to the negative pole via a first resistor (R1), a decoupling capacitor (C2) that is arranged in a serial connection between the half-bridge arrangement and the first or the second lamp filament (W1; W2), the connection of the decoupling capacitor (C2) on the filament side forming a second reference point (B) that is connected to the negative pole via a second resistor (R2) , a comparator (VG) that has a first and a second input and an output, the first input being connected to the first reference point (A), and the second input being con

Abstract: Disconnection device for an electronic operating device for gas discharge lamps. The DC component is evaluated at a coupling capacitor (C5) specifically via a filament. Disconnection is performed in the event of filament breakage. In addition, the AC component of the generator output (O) can be monitored via a second filament, and disconnection can therefore also be performed in the event of breakage of the second filament.

Abstract: A new starting circuit ALS for a free-running oscillator circuit, in particular for a field-effect transistor half-bridge in an electronic ballast for a low-pressure gas discharge lamp EL is described. By using a starting capacitor C5, it is possible to dispense with a diac.

Abstract: The invention relates to a circuit arrangement for operating a lamp (EL), particular a low-pressure discharge lamp, with a load circuit which has at least one inductor (L2) and at least one capacitor (C7, C8, C9), and with an invertor which may be configured as a half-bridge arrangement with two switching elements (T1, T2), and with a drive circuit (AS) for driving the switching elements (T1, T2). The invention provides that the drive circuit (AS) has at least one LC parallel tuned circuit (L3C3, L4C4). The circuit arrangement according to the invention can be produced without separate cost-intensive wound parts.

Abstract: A synthetic membrane consisting of a mixture of polysulfone and sulfonated polysulfone and not more than 20 wt. % of other polymers, characterized in that the mixture contains 0.5 to 8 wt. % sulfonated polysulfone, possibly as the salt of sulfonic acid, and a method for manufacturing this synthetic membrane, characterized in that one or more solvents are added to a mixture composed of 0.5 to 8 wt. % sulfonated polysulfone, possibly as the salt of sulfonic acid, polysulfone and not more than 20 wt. % of other polymers, the mixture is dissolved to form a polymer solution, the latter is shaped, and precipitated to form a membrane in a precipitating bath by means of one or more precipitating agents.