Fire actuated release mechanism to separate electronic door lock from fire door

An electronic door lock comprising:

• a housing mechanically mountable to a first side of a fire door;
• wires extending out of the housing and into the fire door, the wires are connected to an electrical connector for the wires;
• a circuit board mounted within the housing, the wires being connected to the circuit board, the circuit board includes an electrical connector for the circuit board, the electrical connector for the circuit board and the electrical connector for the wires being mating connectors electrically connected together when the electronic door lock is in use;
• a fire actuated mechanical release for mechanically releasing the housing from a first side of the fire door when a second side of the fire door is exposed to a fire;
• a fire actuated electrical release for electrically and mechanically disconnecting the wires from the circuit board when the second side of the fire door is exposed to a fire, the fire actuated electrical release includes a shape memory alloy that changes shape when exposed to the heat of a fire;
• and
• the mechanical release and electrical release cooperating to release the housing from connection to the first side of the fire door and allow the housing to move sufficiently away from the fire door to prevent ignition of the housing and components therein when the second side of the fire door is exposed to a fire, whereby the shape memory alloy is connected to the electrical connector for the wires and disconnects the electrical connector for the wires from the electrical connector for the circuit board when the shape memory alloy actuator is exposed to heat as the second side of the fire door is exposed to said fire.