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Churn.
Patent for a mixing machine designed for churns, but can also be used in ice cream freezers. It works by producing a partial vacuum, forcing the liquid to go from the bottom to the top of the vessel. Blades force the liquid to go against "the centrifugal action" (line 21) and towards the center of the vessel.
Date:
April 27, 1897
Creator:
Norcross, George A.
System:
The Portal to Texas History