Door lock having a lighted display when in the locked position

A locking mechanism for a door, having a first side and a second side the locking mechanism comprising a second side turnable handle disposed on the second side of the door, a first side turnable handle having a housing, a turnable lock actuator and a lighted display assembly that includes an illuminated member that activates when the locking mechanism is locked from the first side of the door by rotating the turnable lock actuator manually into the locked position;

• the display assembly includes a power source, a controller for controlling the operation of the device, a lighted member for emitting light in response to being turned on, a switch member for connecting and disconnecting the illuminated light source from power, wherein the turnable lock actuator is configured for manually moving the locking mechanism between a first normal unlocked position wherein the second side handle is capable of moving the latch between an engaged and a disengaged position in the latch receiver to permit the latch to be disengaged from the latch receiver and a second normal locked position wherein the latch is placed in a locked position in the latch receiver, and is thereby prevented from being disengaged from the latch receiver and wherein the signal generator is configured to not generate a human detectable signal;
• and a third emergency locked position where the second side lock driving device is in the locked position, the latch is engaged with the latch receiver and the signal generator is actuated to generate a human detectable signal.

A door lock comprising

• a latch driving device including an inner operating device and an outer operating device coupled with the inner operating device;
• a latching device coupled with the inner operating device and the outer operating device, wherein the latching device includes a latch movable between an unlatching position and a latching position;
• an outer handle operatively coupled to an outer side of the outer operating device, wherein the outer handle is pivotable to move the latch to the unlatching position;
• at inner handle including a shank interlocked with the inner operating device and a lever extending from the shank, wherein the shank includes a pivotal hole extending from an end face thereof, and wherein the lever includes a chamber intercommunicating with the outer groove;
• a lighting device received in the chamber of the inner handle, wherein the lighting device includes a lighting element facing the outer surface and a switch controlling lighting of the lighting element;
• a first lid that is transmittable to light, and wherein the lighting element is configured to generate light transmitting through the first lid;
• a thumb pivotably coupled with the pivotal hole of the inner handle and interlocked with the latch driving device, wherein the thumb turn includes an actuator controlling the switch to a conductive state or a non-conductive state, wherein the thumb turn is pivotable for moving the latch between a first normal unlocked position where the outer operating device is capable of moving the latch between an engaged position and a disengaged position with respect to the latch receiver, and a second normal locked position where the latch is prevented from being disengaged from the latch receiver;
• and a third emergency locked position where the second side lock driving device is in the locked position and the signal generator s actuated to generate a human detectable signal by the lighting element generating light transmitting through the first lid.