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in subjects: "locks"  
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Permutation Lock.

Description: 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
Partner: UNT Libraries Government Documents Department

Permutation Lock.

Description: Patent for a new and improved combination lock. This design "consists in the construction and novel arrangement of the slotted bolt, follower, and follower-shaft, the elongated bolt-stop pivoted in the slot of the bolt, the radially-slotted disks having concentric stems on the follower-shaft, and the lettered or figured and graduated stem-caps engaging the respective stems by means of circular series of teeth" (lines 20-27).
Date: December 12, 1882
Creator: Saxon, James W.
Partner: UNT Libraries Government Documents Department

Permutation Lock.

Description: Patent for a new and improved combination lock. This design's operation "is as follows: Being unlocked, the bolt is in the retracted position . . . [t]he door can then be operated in the usual manner, being held, when closed, by the ordinary spring-bolt. . . . When the door is closed, in order to lock it, the graduated knob is turned, operating the toothed disk and the first or governing ring, which will . . . throw out the end of the locking-bolt. By turning the handle, all the rings of the s… more
Date: April 17, 1883
Creator: Sarlls, Rutus & Holland, Virgil C.
Partner: UNT Libraries Government Documents Department

Permutation Lock.

Description: Patent for a new and improved combination lock. This design "consists in the construction and novel arrangement of the elongated case, its longitudinally slotted and notched partitions, the boltway over the partitions, reciprocating notched and perforated slides, and adjustable pins or studs engaging the perforations and projecting into the slots of the partitions, the rack-slide, drop-bolt, and graduated knob carrying the pinion" (lines 20-28).
Date: April 24, 1883
Creator: Sarlls, Rutus & Holland, Virgil C.
Partner: UNT Libraries Government Documents Department
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