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4 Matching Results
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Ratchet Die-Stock
Patent for improvement on the usage of die-stocks which are used to cut and thread metal objects such as pipes.
Date:
July 22, 1919
Creator:
Hestand, Rue S.
System:
The Portal to Texas History
Recording Device
Patent for an improved device that records flow of grain in a mill.
Date:
July 22, 1911
Creator:
Hoover, Guy F.
System:
The Portal to Texas History
Lubricator
Patent for a lubricator for locomotives and steam engines. Illustrations included.
Date:
November 22, 1910
Creator:
Coppers, John Andrew & Booth, Eldredge Early
System:
The Portal to Texas History
Railway-Switch
Patent for a railway switch.
Date:
February 22, 1910
Creator:
Shellenberger, Samuel L.
System:
The Portal to Texas History