Abstract: Rotor (1) of an electric machine, in particular an electrically excited synchronous machine, comprising a rotor shaft (3) which can be rotated about a rotor axis (2), in particular which is a hollow shaft, comprising multiple separate salient poles (4) arranged around a circumferential direction of the rotor (1), which are anchored in a rotor yoke (5), in particular interlockingly, characterized in that the rotor yoke (5) is formed in the motor shaft (3).

Abstract: The present invention relates to a method for manufacturing lamellas (20) from sheet metal (30) for a stack of such lamellas (20), i.e. a lamination, such as the core of a transformer or of a rotor or a stator of an electric machine. According to the present invention, in a first manufacturing step (A), the individual lamellas (20) are only partly cut loose from the sheet material (30), while connecting tabs (32) are left between the lamellas (20) and a remaining frame part (31) of the sheet material (30). As a result, the lamellas (20) can be subsequently processed (SP) separately, favorably without requiring the individual and/or direct handling thereof. Only thereafter, in second manufacturing step according to the present invention (B), the lamellas (20) are completely cut loose from the frame part (31) of the sheet material (30) by cutting the said connecting tabs (32) there between.

Abstract: The invention relates to a lighting unit having a concave reflector with an axis of symmetry and a light emission window bounded by a circumferential edge transverse to the axis, an elongate light source extending substantially along the axis of symmetry, which light source is accommodated in a holder opposite the light emission window, and an axially positioned cap, which cap partly surrounds the light source and forms an optical means to intercept unreflected light rays. According to the invention, the light source is surrounded by a sleeve with an end at the side of the light emission window, over which end the cap is positioned by way of a fixing element.

Abstract: The invention relates to a lighting unit having a concave reflector with an axis of symmetry and a light emission window bounded by a circumferential edge transverse to the axis, an elongate light source extending substantially along the axis of symmetry, which light source is accommodated in a holder opposite the light emission window, and an axially positioned cap, which cap partly surrounds the light source and forms an optical means to intercept unreflected light rays. According to the invention, the light source is surrounded by a sleeve with an end at the side of the light emission window, over which end the cap is positioned by way of a fixing element.

Abstract: 4-Chloro-5-amino-2-phenyl-3(2H)-pyridazinone is prepared from 4,5-dichloro-2-phenyl-3(2H)-pyridazinone and ammonia in high yield and substantially free from 4-amino-5-chloro-2-phenyl-3(2 H)-pyridazinone in a method comprising reacting 4,5-dichloro-2-phenyl-3(2H)-pyridazinone with aqueous ammonia in the presence of a catalyst which is capable of selectively exchanging the 5-chlorine atom in 4,5-dichloro-2-phenyl-3(2H)-pyridazinone with a leaving group of such a nature that the resulting intermediate compound is capable of alkylating ammonia to 4-chloro-5-amino-2-phenyl-3(2H)-pyridazinone in high yield in the reaction medium, thereby regenerating the catalyst. The end product is isolated by filtration after the reaction and washed with water, and the mother liquor plus the wash water are used as reaction medium for the next batch.

Abstract: An improved process for the production of sodium salicylate and salicylic acid from phenol at a high degree of conversion with a concomitant reduction in undesirable by-products. The process comprises reacting a sodium phenolate with carbon dioxide in a direct, single step at a temperature above about 165.degree. C. to produce directly sodium salicylate, which is then converted by conventional means to the salicylic acid.