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Manufacture of Aluminum Chloride.
Patent for the manufacture of Aluminum Chloride that can be carried out at lower temperatures with aluminum ore or compound, such as bauxite, sulfur and chlorine, and involves no cooking.
Date:
July 11, 1922
Creator:
Hall, Frank W.
System:
The Portal to Texas History
Self-Lining Interlocking Building-Block.
Patent for interlocking building-blocks that allow for the formation of strong insulated and properly lined walls without the use of skilled labor and with or without reinforcements.
Date:
July 12, 1921
Creator:
Merren, John Jay
System:
The Portal to Texas History
Motorcycle-Stand.
Patent for a motorcycle stand that can be released manually through a lever near the saddle to lock the stand into place until the operator unlocks it.
Date:
July 21, 1921
Creator:
Swenson, Carl J.
System:
The Portal to Texas History
Valve.
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.
System:
The Portal to Texas History
Electric-Current Relay
Patent for Electric-Current Relay to allow capability of use with either a direct or alternating current. This is adapted for economical use in constant temperature apparatus. Further, this technology avoids the possibility of "sticking of relay movable contacts".
Date:
July 19, 1921
Creator:
Lorenz, Charles O.
System:
The Portal to Texas History