Abstract: A device and procedure for creating and securing a temporary safety space within an elevator hoistway such that a service or maintenance technician can work with impunity from a car entering the safety space. In particular, the device includes a stop bar for installation between and in engagement with opposing guide rails of the hoistway to prevent upward or downward movement of the car or a counterweight.

Abstract: In an internal combustion engine with a first and a second exhaust gas turbocharger, which are installed in a common carrier housing, two exhaust gas turbochargers are arranged so that the two charger axes are at an angle to each other which is in the range of 55-100° and lie in the same plane. As a result, the two exhaust gas streams can be brought together with low turbulence even though the manifold is short, and a more compact set of external dimensions can be obtained for the internal combustion engine.

Abstract: A wire connection structure for an integrated circuit (IC) die includes a semiconductor wafer with an active device and/or a passive device. One or more dielectric layers are arranged adjacent to the active and/or passive device. One or more metal interconnect layers are arranged adjacent to the active and/or passive device. A contact pad is arranged in an outermost metal interconnect layer. A passivation layer is arranged over the outermost metal interconnect layer and includes at least one passivation opening that exposes the contact pad. A bond pad is arranged over the passivation layer and the active and/or passive device and is connected to the contact pad through the passivation opening. Formation of the bond pad does not damage the active and/or passive device.

Abstract: A pressure electrolyzer having a pressure reservoir, an electrolytic cell block containing a number of electrolytic cells and positioned in the pressure reservoir, the electrolytic cells each containing anodes and cathodes, and an electrolyte circulatory system for supplying electrolyte to the anodes and cathodes. The circulatory system includes an oxygen separator operative to separate gaseous oxygen formed during operation of the pressure electrolyzer and a hydrogen separator operative to separate gaseous hydrogen formed during operation of the pressure electrolyzer, and a store of an inert gas, to inert the pressure electrolyzer when it is switched off. The store of inert gas is supplied to the oxygen separator. The electrolyte circulatory system further includes a connecting line arranged so that a part of the electrolyte can be pushed out of the hydrogen separator when the inert gas is applied to the oxygen separator so as to displace the gaseous hydrogen.

Abstract: An exhaust gas bellows expansion joint for joining a first section and a second section of an exhaust pipe. The exhaust gas bellows expansion joint including a first corrugated pipe for conveying exhaust gas through the joint, a protective sleeve, which is inserted in the first corrugated pipe, a second corrugated pipe, which coaxially surrounds the first corrugated pipe, and an annular space between the first corrugated pipe and the second corrugated pipe for the passage of liquid through the joint.

Abstract: A device and a method for closed-loop control of at least a first exhaust gas turbocharger with variable turbine geometry. In this regard, a first closed-loop control system is provided for automatically controlling the charge air pressure, and a second closed-loop control system is provided for automatically controlling the turbine speed. The second closed-loop control system is subordinate to the first closed-loop control system. The correcting variable (SG1) of the first closed-loop control system corresponds to the reference input of the second closed-loop control system.

Abstract: An air gap-insulated exhaust manifold for internal combustion engines. The manifold includes a flange with openings for fastening elements and further openings, which align with the cylinder exhaust ports of the internal combustion engine. A gas-tight outer shell is connected to the flange. An inner shell is provided with openings, which align with the cylinder exhaust ports of the internal combustion engine. The outer shell has a trough-shaped lower part and a hood-shaped upper part, which is welded gas-tight to the lower part. The inner shell has a trough-shaped lower part and a hood-shaped upper part. The outer shell is connected to the flange in a gas-tight manner. The inner shell is firmly attached to the outer shell at only one place.

Abstract: A board-mounting device (20) which includes a base carrier (10) that can be snapped down on a board (14). The base carrier (10) includes at least one locking hook (22) which engages behind the board (14) in the mounted condition of the device (20). The device (20) further includes a device carrier (11), connected with the base carrier (10), which is adapted to be moved relative to the base carrier (10). The locking hook (22) is provided with at least one shoulder (43) on which the device carrier (11) is supported by at least one guide pin (31, 40, 50, 60) before the device (20) is in its mounted condition.

Abstract: A position-measuring device for fluidic cylinder-and-piston arrangements having at least one Hall sensor, preferably arranged in the area of the cylinder wall, especially in a cylinder wall, and a magnetic region, arranged in the piston. At least one Hall sensor array has at least two Hall sensors spaced one from the other in the direction of movement of the piston. One coil is provided whose magnetic field permits the switching points of the Hall sensors to be adjusted in response to the coil current.