Abstract: The invention relates to an electrically heatable sock having a foot part and a leg part abutting thereon, at least one heating element being disposed on the foot part which is connected via supply lines to terminals for a voltage supply which has a battery, the terminals being disposed in the upper region of the leg part. As a result of the fact that a cuff which can be folded over is disposed on the upper end of the leg part, the terminals being attached and formed on the side of the cuff situated inside in the folded-over state in order to fix the battery in the correct position in the folded-over state of the cuff and to retain it at least partially, a sock is made possible which is simple to produce and comfortable to wear and ensures a reliable attachment of the components necessary for heating.

Abstract: Described is a lamp which includes two fluorescent tubes arranged in parallel relationship and light distribution chambers which extend laterally therefrom on both sides, and a light-technical louver element arranged beneath the fluorescent tubes, for delimiting the light radiating angle of the fluorescent tubes downwardly, wherein arranged between the fluorescent tubes is an elongate trough which is in the form of a mirror on its outside, for accommodating the electronic operating elements for the fluorescent tubes (FIG. 1).

Abstract: The invention concerns a cable suspension arrangement for hanging luminaries including a holder for a cable which is vertical in the position of installation for suspending a luminaire at a cable holder point and a fixing region for fixing the luminaire to the suspension arrangement, wherein the fixing region has a center, wherein there is provided a mechanism for displacement of the cable holder point laterally with respect to the longitudinal direction in which the cable extends, relative to the center of the fixing region for the luminaire, or for displacement of the center of gravity of the luminaire, laterally with respect to the longitudinal extent of an associated luminaire, relative to the cable holder point of the luminaire housing.

Abstract: The invention, which relates to a method for generating a starting voltage for a fluorescent lamp, in which the starting voltage is generated by means of alternating voltage that is impressed on an LC series resonant circuit, and to a corresponding circuit arrangement, is based on the object of increasing the reliability of starting and avoiding maximum permissible starting voltages being exceeded. According to the invention, this object is solved in that the frequency of the alternating-voltage generator can be controlled by a control unit and in that a measuring circuit is connected to the control unit, whereby the alternating voltage can be gradually reduced from a high frequency to a lower frequency, where the lamp voltage is compared to a setpoint value at certain intervals and the starting procedure terminated when the setpoint value is reached.

Abstract: The invention relates to a method and ballast for operating a lamp (3) fitted with a fluorescent tube (2), whereby the operating data of certain recognizable lamp types (T1, T2, Tn−1, Tn), at least the lamp voltage (UL), lamp current (IL) and preheating currents (Ivorh1, Ivorh2, Ivorhn−1, Ivorhn) is stored in a register (R) for the heating of the electrodes.

Abstract: In order to identify phase failure in an asynchronous machine, monitoring of the phase currents is performed, a trigger signal being generated for each phase in the event of a limit value being undershot. In order to cover the entire frequency range in converter operation, a changeover is made between different monitoring states. In the first monitoring state, the trigger signal is generated if the instantaneous value of the phase current in each case falls below the limit value. A changeover is then always made to the second monitoring state, where the duration of the trigger signal is compared with the swept angle of rotation of the voltage vector in the same phase. If the state of the phase current lasts during this period of time, in a third monitoring state the duration of the trigger signal or the continuance of the phase current state is checked during a defined delay time interval. If the trigger signal outlasts the delay time interval, phase failure is signaled.

Abstract: A modular gear system includes a plurality of gear modules and drive modules. The gear modules and drive modules each have a cylindrical output pinion which facilitates connecting the various modules to provide a desired transmission ratio. At least one of the gear modules is an angular gear module which incorporates a contrate gear which can mesh with an output pinion of a drive module or the output pinion of another gear module.

Abstract: A heat transfer housing for a printed circuit board, which has an electrical component having a thermal contact area, includes an extruded section having a contact area and contours for receiving the printed circuit board. One of the walls of the housing is initially formed displaced outwardly through an angle. When the printed circuit board is installed in the housing, the outwardly displaced wall is rotated inwardly and held in place by a cover. The wall includes a portion which bears against the printed circuit board and forces the thermal contact area of the electrical component to bear against the contact area of the housing for efficient heat transfer.