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Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices"; (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing company · leaf 234

An illustration from Mechanical applicances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical mvements, powers and devices";, 1917, leaf 234
is attached, and thelink is in turn fastened to the un-der side of the vestibule trap door. When the vesti-bule trap door is closed the crank arm on the shaft isbrought to its highest position and the forked armwith the extension step is drawn up close under thefixed step. On raising the trap door…

Mechanical movements

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