spragger

spragger

[′sprag·ər]
(mining engineering)
In coal mining, a laborer who rides trains of cars and controls their free movement down gently sloping inclines by throwing switches and by poking sprags between the wheel spokes to stop them.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Tulisa added: "I picked good old Spraggers because she's amazeballs.
spraggers, and mule drivers--who worked in the collieries (the mine and
down chutes, or as "spraggers," jabbing long pieces of wood