On the Development and Distribution of Primitive Locks and Keys

by Augustus Henry Lane-Fox Pitt-Rivers

Figs. 21C and 22C. Portions of Roman padlock found at Jordan Hill, Weymouth.

Fig. 21C. Side view of lock-case and parallel bar.

Fig. 22C. Side view of bolt with spring catch. a. Bolt. b b. Perpendicular bars of bolt c c. Rings to slip over parallel bar d. e. Catch springs. f. Hole in tube through which bolt is passed. g. Key.

Figs. 23C to 25C. Roman padlocks found at Great Chesterford, Essex ('Archæological Journal').

Fig. 23C. Side view of supposed original form.

Fig. 24C. Improved form showing bolt, a.

Fig. 25C. Improved form without bolt.

Figs. 26C and 27C. Old Swedish padlock.

Fig. 26C. Longitudinal section.

Fig. 27C. Side view of bolt and springs. d. Parallel bar turning on hinge at h, and entering tube case at j.