Abstract: The invention relates to a device for connecting and disconnecting an electrical load circuit, operated at high voltage by a voltage source, in a transportation means that is electrically driven by a drive operated at low voltage. According to the invention, a contact stud (6) is connected to the push rod (11) of a linear drive (2) and the contact stud (6) can be moved into at least two positions in a switch housing (4), wherein the switch housing (4) has, on its internal wall, at least two contact rings (5), one of which is connected to the voltage source (7) and the other is connected to the consumer circuit (8).

Abstract: An asymmetrical bipolar voltage supply comprising a transformer (1), having at least one primary winding (7) and a plurality of secondary windings (8) and a primary-side power supply (2; 25; 28) connected to at least one DC voltage source. The circuit is configured and connected so as to generate in the transformer two oppositely polarized winding voltages UW1 and UW2 with different amplitudes.

Abstract: An apparatus and method for operating a light generator (2) with a voltage source (4) makes possible a simple and reliable determination of the light generator's condition. The apparatus provides (a) a device (5; 13) for generating a measurement voltage the voltage present at ale light generator (2), (b) device (6, 9) for generating a first and a second comparison voltage, each proportional to the current flowing through the light generator (2), (c) a device (9, 8) for forming a difference voltage from the measurement voltage and one comparison voltage and a summation voltage from the measurement voltage and the other comparison voltage, (d) two capacitive rectifiers (7) for rectifying the difference voltage and the summation voltage, and (e) a controller (3), by which the rectified difference voltage and the rectified summation voltage can be evaluated.

Abstract: A laser diode arrangement having a multiplicity of laser diodes (11) arranged along side one another, comprises a heat sink (9) on which the laser diodes (11) are mounted and a cooling body (1) which is in intimate contact with the heat sink (9), wherein the cooling body (1) has two coolant channels (2; 3), which run parallel to the longitudinal axis of the heat sink (9) and are embodied as a feed channel (2) and as a discharge channel (3) for a coolant. According to the invention a multiplicity of cooling channels (5, 7; 6, 8) lying along side one another are provided, which branch off from the feed channel (2), lead past the heat sink (9), and open into the discharge channel (3), wherein cooling channels (5, 7; 6, 8) lying directly alongside one another branch off at different locations of the periphery of the feed channel (2) and of the discharge channel (3).

Abstract: A laser diode arrangement having a multiplicity of laser diodes (11) arranged along side one another, comprises a heat sink (9) on which the laser diodes (11) are mounted and a cooling body (1) which is in intimate contact with the heat sink (9), wherein the cooling body (1) has two coolant channels (2; 3), which run parallel to the longitudinal axis of the heat sink (9) and are embodied as a feed channel (2) and as a discharge channel (3) for a coolant. According to the invention a multiplicity of cooling channels (5, 7; 6, 8) lying along side one another are provided, which branch off from the feed channel (2), lead past the heat sink (9), and open into the discharge channel (3), wherein cooling channels (5, 7; 6, 8) lying directly alongside one another branch off at different locations of the periphery of the feed channel (2) and of the discharge channel (3).

Abstract: A device to polymerize plastics that are to be hardened by means of UV irradiation comprises two different irradiation sources for UV irradiation and IR irradiation, respectively, whose irradiation is projected onto the plastic to be hardened. The irradiation source for the UV irradiation includes a solid-state laser.

Abstract: A laser module (1) with at least two laser units (3) are adjusted such that the emitted beams of the laser units (3) converge. The laser units (3) exhibit cooling channels (5) that are provided with a cooling medium. At least one of the laser units has a curved adjustment surface (10) which his mounted to a facing mounting surface (9) of a mounting unit (2) such that a cooling channel opening in the adjustment surface (9) is located opposite an additional cooling channel opening in the mounting surface (10).