Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 32
permits ample movementof the legs, and at the samepj^ jQ time gives the proper stiff- ness. The fiat surface of one ofthe legs is faced with steel, the other being of German silver,in order that the rubbing parts may be of different metals. Smallset screws are used to prevent the pivoted screws… … 21 14 MECHANICAL DRAWING. instruments the sliank and socket are pentagonal, as sliown inFig. liO. The shank enters the socket loosely, and is held in placeby means of the screw. Unless nsed very carefully this arrange-ment is not durable because the sharp corners soon wear, and thepressure on the…
Architecture · Building · Carpentry
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