cast aluminum and wood (painted) on a vertical panel For
educational use only. All rights reserved by the contributor(s)
and publisher(s). lazy tongs, linkage Editor's note: The lazy
tongs is a parallel link mechanism that will maintain a vertical
line parallel as it extends the reach. In electric rail
applications it is sometimes called a pantagraph mechanism. The
lazy tongs can also be found in the Reuleaux model collection in
model T-2 as part of a series of parallel mechanisms. The lazy
tongs can be seen in the machine drawings of Leonardo da Vinci
especially in his Codex Madrid I. This Clark model was
originally numbered #16 in the Newark Museum collection and now
carries the number 112. [F.C.Moon, 2005]