Many pieces of demonstration equipment must be rotated to show a desired effect. A Rotator is a device with a crank that can rapidly rotate a small horizontal platform about an axis. Other pieces of equipment, like Newton’s Color Wheel, attached to the platform of the Rotator for the purpose of demonstration.
Property of the W&L Physics & Engineering Department
“Rotator,” Digital Exhibits at Washington and Lee University Library, accessed January 23, 2018, http://omeka.wlu.edu/items/show/170.