LAENGS EINER WANDUNG FERNGESTEUERT BEWEGBARE VORRICHTUNG

摘要

A remotely movable carriage is described. The carriage finds particular utility in serving as a mobile platform from which remotely initiated and controlled inspection and work operations might be performed on the tubes in a nuclear steam generator. The carriage includes a stepping mechanism which interacts with a member, such as a tube sheet, relative to which the carriage moves in generally parallel relationship. The stepping mechanism may employ selectively extensible fingers for lateral engagement with openings in the member. Some of the fingers may be movable transversely of their longitudinal extent in a linear direction, relative to the remainder of the carriage, to effect a "stepping" of the carriage.