Patent ID: 6585303
Filing Date: 2003-07-01
Classification: E05B,E05F,E05Y,Y10T

Abstract:
A door locking mechanism for double deadlocking a door, said door locking mechanism comprising: a lockhead member including a door stopping portion, said lockhead member moveable from a locked position wherein the door is double deadlocked and an unlocked position; a vertical locking mechanism coupled to the lockhead member, said vertical locking mechanism deadlocking said door when said lockhead member is in the locked position, said door stopping portion of said lockhead member also deadlocking said door when said lockhead member is in the locked position; a carriage assembly engaged with the door, said carriage assembly including at least one surface for engaging said door stopping portion and moving said lockhead member from the locked position to the unlocked position, wherein said vertical locking mechanism disengages said door when said lockhead member is in the unlocked position and said door stopping portion of said lockhead member also disengages said door when said lockhead member is in the unlocked position; and a motor driveably engaged with said carriage assembly, wherein movement of said carriage assembly causes the carriage assembly to engage the door stopping portion of the lockhead member and move the lockhead member to the unlocked position, further comprising a motor control circuit including a first limit switch for sensing said carriage assembly, a second limit switch for sensing said carriage assembly, and at least one indicating device for indicating a position of the door, wherein the first and second limit switches are in communication with the indicating device, wherein said motor control circuit further includes at least one switch which is operable to select which one of the first and second limit switches dictates what status is indicated by the indicating device when the door is in a given position.