Vacuum electric furnace
AssigneeAbar Corporation
InventorsBenjamin A. Kreider, William J. Metalsky
Life of this patent
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Abstract
A vacuum electric furnace is disclosed for operation with a hostile environment therein which may be above the melting temperature of most metals, other than refractory metals, with apparatus in the furnace for advancing the work, the advancing apparatus being a walking beam with provisions for protecting the exposed portions of the walking beam by the use of graphite and with work supporting buttons of molybdenum to prevent the work from reacting with the graphite at high temperatures, and with separation and shielding of portions of the walking beam from the hot zone and with liquid cooling of the shielded portions.
Claims13
Apparatus for the support of work pieces in a vacuum electric furnace which comprises, within the furnace tank:
- heating elements within the upper part of said tank to provide a heated zone,
- fixedly mounted spaced parallel work supporting rails of a material resistant to the temperatures in said heated zone,
- a stationary frame disposed below said rails,
- supporting members for said rails extending upwardly from said stationary frame,
- shielding members interposed between said rails and said stationary frame for preventing radiant heat transmission from said heated zone to said stationary frame,
- means for cooling said stationary frame,
- means for advancing work pieces along said rails,
- said last means comprising
- work piece supports movable to positions above and below said rails and longitudinally with respect thereto for elevating work pieces above said rails for advancing movement with respect to said rails, and
- a second frame movable with respect to said stationary frame for positioning said work piece supports and having supporting pins for said work piece supports extending upwardly therefrom,
- said shielding members preventing radiant heat transfer to said movable frame,
- said shielding members include a fixed shield through which supporting members extend, and
- a movable shield having openings therethrough for said supporting members,
- said fixed shield being in shielding relation to said openings, and
- means for cooling said movable frame.
Dependencies are inferred from the claim text.