down over a sheave pul- other end rests on a revoluble drum, driven from any front of the frame is hinged a tongue. In depending ley and up over a loose pulley of the frame, and thence continuously revolving shaft. As the vane shaft is re- brackets are held caster wheels adapted to swing and over… … A PERAMBULATOR, ROCKER, XTC., tioned at the grades, and the two cars then work to- gether by the use of their own motors, the one going deeper portion of the cam rides past the arm is raised down hill assisting the one which is going up. The revolve as required, and the caster wheels are adapted by…
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