Bbc Brown, Boveri & Company, Limited

Brown, Boveri & Cie Ag

Jurgen Baer

Ernst Toplak

Fritz Hegewaldt

Horst Gillhaus

Hans-Dieter Sommer

Wolfgang Faber

Industrial oven providing air recirculation for heat treatment processes having temperature uniformity within a charge to be treated, including oven walls, spacers disposed between the oven walls for supporting the charge at a distance from the oven walls defining a space therebetween and for allowing a recirculated hot air flow around the charge from all sides, and elements disposed in the space between the charge and the oven walls for influencing the air flow.

Industrial oven with air recirculation for heat treating processes

A method for starting a blower in the form of a single-stage radial fan installed in a pressure system such as the circulating cooling system of a turbogenerator in which the resistance of the pressure system is varying during the starting operation by means of a starting duct provided with a throttling element. The throttling element is closed at any desired blower speed ranging from 10 to 100% of its rated speed when the point of intersection between the pressure system characteristic, modified on the basis of the open throttling element, and the blower characteristic has been reached whereupon the desired point of operation conforming to the blower characteristic and the system characteristic will regulate itself automatically.

Method and apparatus for starting a blower

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Magenwil, Switzerland

Jurgen Baer