San Francisco : Architect and Engineer, Inc · leaf 437
consists essentially of a wooden framehinged in the middle and supported by a bicycle wheelat each end, with two wheels at the middle hinge. Oneend of the frame extends well beyond the middle, actingas the primary arm of a compound lever. No springs orweights are required and the weight of the… … ^jmpograph devised by E. L. Senz consists of a wooden (rame supported by a bicycle wheel at each end and two wheels at the middle hinge where■narling device is located. At right, the machine folded for transportation. At bottom Mr. Seiti operating the machine and carrying straight edge. Atright,…
Architecture · Building
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