Permutation Lock. (open access)

Permutation Lock.

Patent for a new and improved combination lock. This design consists of "[a] door having at its edges the sockets formed by ribs and mouths in combination with permutation-disks, seated in said sockets and handles" (lines 5-8).
Date: June 28, 1881
Creator: Sevier, Moses Nimrod
System: The Portal to Texas History