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4 Matching Results
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Adding-Machine
Patent for adding machine that has improvements such as a controllable disk to avoid over or under rotation and simpler means of adding and removing adding disks.
Date:
February 16, 1915
Creator:
Sweet, William F. & Tideman, S.
System:
The Portal to Texas History
Air-Compressing Apparatus.
Patent for a new air compressing apparatus which employs two kinds of tanks called high pressure containers and low pressure containers charged by means of an air compressing engine.
Date:
March 16, 1915
Creator:
Gebhardt, William Charles
System:
The Portal to Texas History
Flexible Joint
Patent for a flexible joint provides "an improved and simplified device that is simple, durable and reliable in construction and effective and efficient in operation" (lines 10-13).
Date:
November 16, 1915
Creator:
Mooney, Thomas H.
System:
The Portal to Texas History
Double Stroke Pumping Jack
Patent for a double-stroke pumping jack with two pistons in the same cylinder "to discharge a steady stream of water therefrom" (line 12-13). This invention allows the pipe cylinder and pistons to be easily removed for repairs or cleaning.
Date:
March 16, 1915
Creator:
Winterborne, William H.
System:
The Portal to Texas History