Page:A Dissertation on the Construction of Locks (1785).pdf/29

 and being formed by this proceſs to tally with the face, which the tumblers preſent, will acquire as perfect a command of the Lock, as if it had been originally made for the purpoſe. And the key, being thus brought to a bearing on all the tumblers at once, the benefit ariſing from the increaſe of their number, if multiplied to fifty, muft inevitably be loſt; for, having but one motion, they can act only with the effect of one inſtrument.—But nothing is more eaſy than to remove this objection, and to obtain perfect ſecurity from the application of Mr. Baron’s principle.

If the tumblers, which project unequally, and form a fixed tally to the key, were made to preſent a plane ſurface, it would require a ſeparate, and unequal motion to diſengage them from the bolt; and conſequently, no impreſſion could be obtained from without, that would give any idea of their poſitions with reſpect to each other, or be of any uſe even