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Improvement in Throttle-Valve Stands and Stems.
Patent for "a new arrangement of support for the stem of a throttle-valve, and has for its object to facilitate the lubricating of the screw and cause the parts to be firmly held in place." (Lines 19-23) Includes instructions and illustrations.
Date:
April 2, 1872
Creator:
Compant, John M. & Krauskopf, Engelbert
System:
The Portal to Texas History