Abstract: The reciprocating floor conveyor (10) has a frame (14) guide beam assemblies (46) and floor slats (50) slidably mounted on the guide beam assemblies. An A group of floor slats (50) are connected to a transverse drive beam (100) and reciprocated back and forth by a hydraulic cylinder (116). A B group of floor slats (50) are connected to a transverse drive beam (102) and reciprocated back and forth by a hydraulic cylinder (124). A C group of floor slats (50) are connected to a transverse drive beam (104) and reciprocated back and forth by a hydraulic cylinder (130). Solenoid operated control valves (152, 154 and 156) direct hydraulic fluid to the respective cylinders (116, 124 and 130). A logic control unit (210) determines the positions of the A, B and C groups of floor slats as indicated by sensors (174, 176, 178, 180, 182 and 188) and energizes the solenoid operated control valves (152, 154 and 156) to reciprocate the A, B and C groups of floor slats and convey material supported by the floor slats.

Abstract: A hand-held instrument for examining a drill bit, comprising a stand of transparent material, a microscope mounted on the stand, and means carried by the stand for holding the drill bit in position to be viewed through the microscope when the instrument is held up to the eye of the user.