Siemens Aktiengesellschaft

Wolfgang Berger

Norbert Steinemer

Hans Bettge

Gunter Bialkowski

Hans Rottger

Peter-Michael Bany

Rafl Rozek

Claus-Jurgen Volkmann

A vacuum switching tube having an evacuated housing in which contacts are disposed movable relative to each other and an improved current lead for such a vacuum tube are disclosed. The current lead comprises a core and a jacket surrounding the core. The core is made of a material with low electric conductivity compared to the jacket and has a helical outer contour. The core can be made by twisting a rod of polygonal or star-shaped cross section. A jacket of a material with relatively high electrical conductivity and with a smooth cylindrical outer contour is applied to the core. The jacket is joined to the core firmly without space between them or is made in one piece with the core.

Vacuum switching tube with a helical current path

A steam generator has an upstanding tube bundle radially enclosed by a vertical cylindrical wall, the tube bundle being centered within the wall by a tube spacer grid connected to the inside of the wall by keys and keyways which can slide vertically relative to each other, relieving the tube bundle and wall from mechanical stressing due to vertical thermal expansion and contraction causing relative vertical movement between the tube bundle and wall.

Steam generator, tube-bundle centering arrangement

Growing community of inventors

Erlangen, Germany

Wolfgang Berger