U.S. Philips Corporation

Other

Pieter Aart Naastepad

Jacob W De Ruiter

George A Asselman

Adrianus P Castelijns

David Bruce Green

David B Green

An isothermal heating device comprises an annular tubular body providing a heating chamber for objects. Between the inner wall and the outer wall of this tubular body there is provided a plurality of separate ducts which are situated in a ring-shape about the heating chamber and which extend parallel to the tubular body axis. These ducts contain an evaporable heat transport medium and are in communication with each other preferably at one end of the tubular body. Such interconnection is in turn connected with a gas buffer reservoir containing an inert control gas.

Heating device

An induction melting furnace comprising a conical crucible and a conical induction coil which envelops the crucible. The induction furnace comprises means for bringing the crucible under a compression stress and for maintaining this compression stress during the melting process.

Induction melting furnace

A heating device, comprising a tubular body whose inner wall bounds a heating chamber for objects. Between the inner wall and the outer wall of this body a plurality of ducts is provided which are situated in a ring-shape about the heating chamber and which extend parallel to the tube axis. These ducts are separated from each other by rigid partitions. Each duct contains evaporable heat transport medium.

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Eindhoven, Netherlands

Pieter Aart Naastepad