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Mechanical Toy Hoop
Patent for improved features for mechanical toy hoops, particularly for toys utilizing trundling hoops.
Date:
September 5, 1916
Creator:
Giesecke, Leo
System:
The Portal to Texas History
Engine Valve Mechanism
Patent for an engine valve mechanism. This invention is a "class of steam engines wherein the cylinder-inlet and exhaust-ports are controlled by separate and distinct values." Illustration included.
Date:
September 5, 1905
Creator:
Moore, Ezra G. & Moore, Frank T.
System:
The Portal to Texas History