actuated roller switch

actuated roller switch

[′ak·chə‚wād·əd ′rō·lər ′swich]
(mechanical engineering)
A centrifugal sequence-control switch that is placed in contact with a belt conveyor, immediately preceding the conveyor which it controls.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.