Abstract: Electromagnetic screw channel pump having a helical delivery channel, including polyphase coils for generating a magnetic field travelling in circumferential direction of the delivery channel and a magnetic flux return structure, the polyphase coils being arranged in a cylindrical inner portion, and the magnetic flux return structure being arranged outside of the helical delivery channel.

Abstract: Electromagnetic pump for circulating and stirring liquid metal in a vessel. The pump is arranged in a liquid-metal-resistant immersion box. The pump has an approximately horizontal pump canal with the openings on two opposite sides of the liquid-metal-resistant immersion box. The pump can be immersed in the liquid metal bath by means of a suspension device. The pump canal has an elongated cross section and the longest dimension of the cross section is vertical. Comb-shaped magnet coil cores with magnet coils are arranged on both broad sides of the pump canal.

Abstract: Device for controlling a liquid metal flow in a tube having a prismatic cross section including a plurality of comb-like slotted magnet cores grouped about the periphery of the tube and extending parallel to the flow direction of the liquid metal, electromagnetic coils respectively connected to one of the phases of a polyphase alternating current and mounted respectively on teeth of the plurality of comb-like magnet cores, n.x of the coils of which n equals an optional whole number and x equals the number of a-c phases being mounted on each of the magnet cores, the magnet cores being disposed in planes extending at an angle other than 90.degree. to the surface of the tube.

Abstract: An exchangeable measuring head is secured to a flexible or rigid manipulating tube and is slidingly directed in a guide tube to a measuring location. The measuring head contains three induction coils for measuring bubble content, for instantaneously detecting temperature increases, and for measuring flow velocity.