Motorized locking mechanism for a door

A door locking mechanism which comprises:

• a base plate;
• a cam plate slideably mounted on said base plate for movement between a first position, a second position and a third position
• a bolt operatively connected to said cam plate to be held thereby in either a locked position or an unlocked position, or allowed to move between said locked and unlocked positions in response to the respective positioning of said cam plate in said first, second or third position;
• a latch operatively engaged with said cam plate and slideably mounted on said base plate for movement with respect thereto between a forward position and a retracted position;
• and
• means for urging said latch toward said forward position to hold said cam plate in said third position while the door is open.

An apparatus for controlling the reciprocal movement of a door bolt between a locked position wherein the bolt holds a door and a doorjamb in a closed relationship and an unlocked position wherein said door can be opened relative to said doorjamb which comprises:

• a base for reciprocally holding said bolt thereon;
• a cam plate slideably mounted on said base plate for movement between a first position wherein said bolt is held in said locked position, a second position wherein said bolt is held in said unlocked position, and a third position wherein said bolt is reciprocally moveable between said locked and said unlocked positions;
• a latch slideably mounted on said base plate and operatively engageable with said cam plate while being urged into a retracted position by said door to hold said cam plate in said second position;
• and
• means for holding said cam plate in said third position when the door is open.