Patent ID: 7866195
Filing Date: 2011-01-11
Classification: E05B,Y10S,Y10T

Abstract:
1. A door lock indicator device, comprising: a frame including a rotatable portion defining an opening shaped to receive a key blade; a lock status display; and a check-status switch, wherein the door lock indicator device is battery powered, the door lock indicator device is configured to be attached to an existing door lock with the opening aligned with a keyhole of the door lock such that a key extending through the opening and into the keyhole of the door lock is capable of operating the door lock, activating the check-status switch is independent of rotation of the rotatable portion, and activating the check-status switch when the door lock indicator device is attached to the door lock causes the lock status display to indicate a direction of a most recent rotation of the rotatable portion, a locked or unlocked status of the door lock, or both the direction of the most recent rotation of the rotatable portion and the locked or unlocked status of the door lock.