hoist slack-brake switch

hoist slack-brake switch

[′hoist ¦slak ‚brāk ‚swich]
(mechanical engineering)
A device that automatically cuts off power to the hoist motor and sets the brake if the links in the brake rigging require tightening or if the brakes require relining.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.