Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 458
vantages that the wooden guidedid not possess (that of remaining in alignment and consequentlygiving smoother action being the principal one), caused the neces-sity for a different form of safety than the eccentric or chisel dogs, 356 ELEVATORS 43 before described, which were not applicable to this… … Fig. 27. Safeties for Steel Guides. caused the jaws of same to grip the steel guides with tremendousforce, but the means of applying them being gradual they didnot stop the cage suddenly but allowed it to slide several feet,brincrino- it crradually to a stand. The form of governor used to actuate…
Architecture · Building · Carpentry
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