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Upward-Current Separating Process and Device.
Patent for upward-current separation processes and devices to allow for working with changes in conditions and proportions with ease.
Date:
July 3, 1917
Creator:
Allen, Charles
System:
The Portal to Texas History
Screening Device.
Patent for a screening device that offers "an improved means for imparting motion to and controlling or varying the motion of the screen to affect a separation of the materials undergoing treatment." (lines 10-13).
Date:
July 24, 1917
Creator:
Cole, David
System:
The Portal to Texas History