A drive circuit for a three-phase inverter, in which each square halfwave of the output voltage is, for the purpose of harmonic wave damping, interrupted by two gaps which are symmetrically disposed in the first and last 30 DEG section and bounded by the angular spacings alpha 1 and alpha 2 from the ends of the halfwave, particularly for operating a speed regulated A.C. motor. The drive circuit...

A drive circuit for a three-phase inverter, in which each square halfwave of the output voltage is, for the purpose of harmonic wave damping, interrupted by two gaps which are symmetrically disposed in the first and last 30 DEG section and bounded by the angular spacings alpha 1 and alpha 2 from the ends of the halfwave, particularly for operating a speed regulated A.C. motor. The drive circuit...

Povidone is sterilized by irradiation in the presence of iodine and iodide ions. In particular solutions of povidone are sterilized by gamma-irradiating the povidone in the presence of iodine and iodide ions, which are present in an amount which prevents gelation at that dose of gamma radiation which would cause gelation in the absence of the iodine and iodide ions. The gamma irradiation of povido...

In order to be able to operate electrically driven drills, hand lamps, and the like on building sites where only 380 volts three-phase current is available, a combined unit is used which is of the pin contact type. Apart from a 380 volt three-phase current take-off, it also has a 220 volt single phase power outlet. (Provisional Basic advised week 84/03)(0/0)

Mixt. contains trinitrotoluene mixed with gelatine or cellulose nitrate and ethylene glycol dinitrate-glycerol nitrate. - The detonation speed exceeds 6000m/s. The explosive contains 40-70% trinitrotoluene. Mixt. contains oxidising salt, esp. ammonium nitrate-sodium nitrate. It also contains microspheres, e.g., bakelite microspheres. Directional explosion is achieved using a metal core. (Provision...

The invention relates to a method and arrangement for sorting packaging 7, preferably returned drinks containers. The container is compressed between two pressure plates 1, 2 that can be moved in relation to each other, while at the same time the electrical conductivity in the container material is detected. In this way, containers with a conductivity less than a particular predetermined value are...

The invention concerns a facility for the cleaning of water by biological means, in which the facility consists of a closed container 2 which is fitted with a bed 14 of solid particles designed to act as a carrier medium for the formation of micro-organisms. In addition, the facility provides the means of creating a relative movement between the foresaid carrier medium and the water intended for t...

The invention relates to an assembly tool for fitting valve spring units in the cylinder heads of engines using a handling robot. This consists of a magazine 1 for a number of spring units 2, an opening 6 in the bottom 1a of the magazine 1 with a movable blocking element 8, which in its blocked position prevents the spring unit 2 from dropping through the opening 6 and in its free position allows ...

In order to provide a compact construction and good particle separation in a heat generator with a quick fluidized bed, it is arranged that the rear wall 12 of the furnace be deflected towards the front wall 11 near its top, forming a roof 20 in the furnace. Immediately below the roof, an outflow opening 21 is arranged for at least one cyclone cleaner, the particle outlet 25 of which is connected ...