Abstract: High voltage insulator is produced by inserting a fiber reinforced core into the mold and filling the mold from the bottom through a casting pipe line attached to a tank for a ready to use liquid silicon rubber mixture, and transferred to the heated mold where crosslinking of the mixture occurs.

Abstract: The object of the invention is a method for the production of positive active material for lead storage batteries. This active material consists of PbO and PbO.sub.x --where x is a number between 1 and 2--and some powder being composed of not more than 30 to 35% lead in optional ratio and some water. The basis of the invention is mixing glycerine and polytetrafluorethylene, as addition, to the active material.

Abstract: Material is comletely atomized, and converted into a plasma state by directing the feeding of the burner so that the material to be decomposed and an oxidizing agent (oxygen, air, etc.,) are in a suitable ratio at every point of the equipment so that the waste transforms in stable combustion products. There is no need for a catalyst or for any other subsidiary materials. The recovery of certain end products as chemical basic materials is also effected. The oxidizing agent may be air, air enriched with oxygen or oxygen. Plasma can be produced from air, or from the waste, itself. With waste materials containing halogens, it is advisable to introduce water into the plasma to promote the formation of hydrogen halogenids. A MHD generators or conventional heat exchangers may be used and the final gases are to be desacidified before letting them outdoors by treatng them with a weak alkaline washing solution.

Abstract: An electrical machine with compressed air cooling, the compressed air being circulated in a closed circuit. After having the compressed air heated by thermal losses of the electrical machine is cooled in the heat exchanger, it is led back into the machine. The compressed air is passed through the cooling channels between two layers of the armature winding heads, resulting in a steady thermal dissipation from the armature windings. Compared to the traditional machines the surface heat transmission factor --increasing due to the pressure--and steady cooling of the armature winding, enables the decrease of the mass of the machine per unit output.