#  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  Y  Z

Sack Traps

Sets of hinged twin trap doors in the floor, set vertically above each other, with the SACK HOIST chain passing up between them. The trap doors lift as sacks of GRAIN press up from below and fall shut by gravity when the sack has passed through. Also known as a HATCH.

Alternative terms