Today in 1930, US Patent 1760071 A was issued, an invention of Henry George Koepke, for his “Centrifugal Separator.” There’s no Abstract, though it’s described this way in the application:
My invention relates to centrifugal separators of the discharge nozzle conical type, primarily constructed for the separation of yeast from most of the associated liquids in which it has been’ propagated.
