On the Development and Distribution of Primitive Locks and Keys

by Augustus Henry Lane-Fox Pitt-Rivers

Figs. 82C to 84C. Modern steel lock from India, with screw action (India Museum).

Fig. 82C. Side view.

Fig. 83C. Longitudinal section.

Fig. 84C. End view.

Figs. 85C to 89C. Modern iron lock from Brussels, with screw action.

Fig. 85C. Side view.

Fig. 86C. Longitudinal section.

Fig. 87C. Side view of staple.

Fig. 88C. End view of staple.

Fig. 89C. Side view of key.