Model: 143 Rotary Conveyor
A spiral blade is attached to the driving shaft so that as it rotates, the material being conveyed is pushed forward by the face of the blade in the direction of the arrow.
[Virginia Downward & William M. Clark, 1930]

[Editor’s Note: This type of conveyor can be used for both fluid and solid material including granular material such as food grains. This screw mechanism is similar to the Archimedes screw of Model 126. An enclosed screw pump for food grains was used by the American inventor Oliver Evans in his design for an automated grain mill around the end of the 18th century. FCM]

Francis Moon 2005-00-00

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