Abstract: The dead bolt assembly of this invention features a novel cam activating assembly which permits election of one of two door knob spindle backsets which are in standard usage without the need for substituting different operating assemblies or reversing cylinder or thumbturn spindle components. The cam activating assembly features two parallel rotatably mounted cams which operate about two separate and parallel axes which are the centers of the two spindle backset in common industry usage. The two cams accept the door cylinder drive bar in one of the two predetermined backset positions. Each cam is capable of independently operating the latchbolt in either direction of rotation through coupled opposed cam surface which coact with the latch operating plate in conjunction with a coupling idler to convert the rotary motion of the cams to the reciprocating motion required to extend or retract the bolt.

Abstract: A water tight hopper gate has a support and control system enabling limited vertical movement of the gate whereby unwanted liquid may be drained from a solids load and enabling subsequent horizontal movement of the gate for the discharge of the solids load.