Abstract: A conveyor with a carriage activates actuators which encourage the carriage along a path. The position of the carriage is detected and used to activate mechanical stimuli to advance the carriage position. Only the portions of the device which are directly advancing the carriage are consuming energy thereby providing an efficient conveyor. Various geometries are suggested such that the conveyor function is independent of carriage path. Various forms of mechanical actuators can be utilized to achieve the same results. The devices have function independent of any particular actuator.