Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 33
ocket 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 set screw is not sufficient to hold the shank firmlyin… … Fig. 17. Fig. 18. is made tapered and is circriar. The shank fits accurately, andis held in perfect alignment by a small steel key. The clampingscrew is placed upon the side, and keeps the two portions of thesplit socket together. Figs. IT and 18 show that both legs of the compasses arejointed in…
Architecture · Building · Carpentry
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