Valve.
Description:
Patent for improvements to valves, specifically valves that have a sliding movement on the valve seat and to disk valves. The invention is to provide a valve of this type which is used in the interior of vats, tanks, or similar receptacles containing liquids.
Date:
July 5, 1921
Creator:
Spencer, Elmer H. & Block, A.C.
Item Type:
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Partner:
UNT Libraries Government Documents Department