Abstract: The invention relates to an apparatus for insulation monitoring between a low-voltage supply system and a high-voltage supply system, wherein the apparatus can be connected both to a high-voltage positive connection and also to a high-voltage negative connection and also to the low-voltage supply system, wherein the apparatus has a plurality of electrical contacts for coupling monitoring connections to the high-voltage circuit by means of a respective high-voltage positive connection and by means of a respective high-voltage negative connection, it being possible for said contacts to be connected in different sections of the high-voltage supply system.

Abstract: The invention relates to an apparatus for insulation monitoring between a low-voltage supply system and a high-voltage supply system, wherein the apparatus can be connected both to a high-voltage positive connection and also to a high-voltage negative connection and also to the low-voltage supply system, wherein the apparatus has a plurality of electrical contacts for coupling monitoring connections to the high-voltage circuit by means of a respective high-voltage positive connection and by means of a respective high-voltage negative connection, it being possible for said contacts to be connected in different sections of the high-voltage supply system.

Abstract: A play-free plain bearing arrangement with a defined preset torque includes a plain bearing, wherein the plain bearing comprises a bearing housing and a bearing sleeve inserted into the bearing housing, wherein the bearing sleeve and the bearing housing are open axially. The play-free plain bearing arrangement also includes a shaft as a bearing mate of the bearing sleeve. The plain bearing arrangement is characterized in that the shaft having an oversize is inserted in the bearing sleeve in such a way that the bearing sleeve and the bearing housing expand.

Abstract: The invention concerns a novel process for the preparation of 2H-chromenes of formula I and formula 5 and valuable intermediates of formulae 3 and 4 of this process.

Abstract: A play-free plain bearing arrangement with a defined preset torque includes a plain bearing, wherein the plain bearing comprises a bearing housing and a bearing sleeve inserted into the bearing housing, wherein the bearing sleeve and the bearing housing are open axially. The play-free plain bearing arrangement also includes a shaft as a bearing mate of the bearing sleeve. The plain bearing arrangement is characterised in that the shaft having an oversize is inserted in the bearing sleeve in such a way that the bearing sleeve and the bearing housing expand.

Abstract: The present invention relates to a novel process for the preparation of the compound of formula I, a dihydrofolate reductase inhibitor and to valuable intermediates in this process.

Abstract: The invention concerns a novel process for the preparation of 2H-chromenes of formula I and formula 5 and valuable intermediates of formulae 3 and 4 of this process.

Abstract: The present invention provides a sliding window assembly having a fixed window portion and a sliding window portion. The sliding window portion is operable to move in a perpendicular direction relative to the fixed window portion and also is operable to move parallel to the fixed window portion to slide behind the fixed window.