Head sheave | Article about head sheave by The Free Dictionary
head sheave[′hed ‚shēv]
Pulley in the headgear of a winding shaft over which the hoisting rope runs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
The fixed jib adaptations include a runner, head sheaves
and a new hook block designed to prevent the device from becoming twisted.
Some of the original head sheaves
remain in place today.