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Train-Line Valve.
Patent for "a cut out cock for pneumatic air brake systems." This invention allows the brake lines to be bled so that all brakes may be applied simultaneously.
Date:
August 30, 1921
Creator:
Weaver, Charles H.
System:
The Portal to Texas History
Process of Heating Oil-Retorts and Apparatus Therefor.
Patent for "a method of securing even heating of oil retorts and the like throughout their length" and "a new apparatus, particularly intended for the heating and cracking of oils to convert the same into pyrolytic products". The invention may be used for any oil converting retort, but the patent description relates to the production of gasoline.
Date:
August 16, 1921
Creator:
Alexander, Clive M.
System:
The Portal to Texas History
Game.
Patent for a "a game of skill, rather than a game of chance" (lines 11-12), albeit with elements of a game of chance, in the style of a carnival game. The game consists of a motorized, revolving model airplane and a circular arrangement of nets (one for each player); the airplane drops candy into the winning player's net.
Date:
August 9, 1921
Creator:
Auffurth, Erwin, Jr. & Hjerpe, Erick
System:
The Portal to Texas History
Price-Tag Holder.
Patent for "an improvement in price tag holders" (lines 9-10) such that the price tag holder is connected to a garment hanger, including one illustration.
Date:
August 30, 1921
Creator:
Newton, Andre Hutt
System:
The Portal to Texas History