The Padlock Patent Archive

Three centuries of keeping things shut

1840s lock

Technical patent drawing showing nine figures of a padlock: an exterior view with U-shaped shackle and escutcheon, two cutaway interior views revealing internal hook and latch mechanisms, two individual hook pieces of differing weight, a latch piece, two keys with hollow bow handles, and a small bent spring trap.PADLOCKWilliam Ball · April 16, 1842