Improvements in the construction of trucks to raise and lower stairs and lands ondulados and quebradizos. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in the construction of trolleys for up and down stairs and wavy and brittle lands, characterized because it is constituted by a train of wheels with block devices, formed by three or more wheels that turn crazy at the ends of equidistant shanks of an axle on the rotation of said shanks, with rotation always free in a certain direction, and whose rotation in the opposite direction is conditioned to the position of a ratchet on a sprocket existing on the axis of each train of wheels; said ratchet is attached to a cable that links it with a lever located at the end of the arm from which the truck is driven, supported on this train of wheels. (Machine-translation by Google Translate, not legally binding)