ontrolled by a clock fastened to the insideof the door. The clock could be set at the hour at which 90 THE EVOLUTION OF THE LOCK it was desired to open the door, and at that hour and atno other could the key be made to open it* To-day permutation, combina-tion, dial and time locks are in extensive…
Art · Arts and crafts movement
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
