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Apparatus for inserting and removing specimens from high temperature vacuum furnacesThe apparatus comprises a high speed gate valve for isolating the interior of the furnance from an air lock chamber on the opposite side of the gate valve. The air lock chamber is provided with valve ports connected to a vacuum source, a source of inert quenching gas, and the atmosphere, respectively. Attached to the end of the air lock chamber away from the furnace is a cylindrical tube having disposed within it a rod carrying specimen pan at the end towards the furnace and having mounted at its top end an annular magnet having a diameter slightly less than the interior diameter of the tube. The top end of the tube is closed by a removeable cap. Encircling the tube in the vicinity of the magnet is a carbon steel ring which when axially moved along the tube causes the magnet to follow it and thereby controls the position of the rod and specimen pan within the tube.
Document ID
19740019787
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Whitehead, C. W. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
June 18, 1974
Subject Category
Space Vehicles
Accession Number
74N27900
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,817,084|NASA-CASE-LAR-10841-1
Patent Application
US-PATENT-APPL-SN-307729

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