On the Development and Distribution of Primitive Locks and Keys (Classic Reprint) - Softcover

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Excerpt from On the Development and Distribution of Primitive Locks and Keys

V desideratum to construct a bolt which could be drawn back only by the use Of a key, which the owner might carry about with him, and thereby secure his goods and chattels whilst he himself was absent in the fields, or in the hunting grounds. SO necessary a requirement of every day life must have forced itself upon the notice of the greater part of mankind, and it is not surprising, therefore, to find that this stage of the development of the lock forms the point of trifurcation Of three separate branches of improvement. Two of these are Of the nature of tumbler locks, and consist of apparatus for raising the pin or pins by which the bolt is secured when they fall into the holes provided for them on the upper surface of it. It was for this reason that they were termed tumblers, because they tumble into the holes when the lock is closed. The third branch led off in another direction.

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