GENERAL DESCRIPTIONBecause of its simplicity, ease of access into
the furnace, and small volume, the furnace is easily purged. Work specimens are,
therefore, very quickly prepared and a very high degree of purity is maintained.
Astro Model BJ
Vacuum Arc Furnace consists of a water-cooled stainless steel
Bell Jar hinged from a fixed baseplate. Clamps are provided for operation at slightly
positive pressure. The electrode (stinger) shaft penetrates down through the Bell Jar top.
The hearth is water-cooled copper with interchangeable top surface.
A light and window are provided for observation inside the Bell Jar.
The stinger is sealed to the Bell Jar top by means of a ball joint and stainless steel
bellows. Pressure compensation for "zero feel" is incorporated into the design
of this seal.
Provision is made for attachment to a vacuum pump for evacuation prior
to back filling with inert gas. Also included are ports and gauges for inert gas.
cards.