Door controlling device

A device comprising:

• a door having an open, first position and a closed, second position, with a force tending to move said door toward said second position;
• a disengageable stop connected to said door to hold said door in said first position;
• a motor connected to said door, said motor having an ability to move said door from said second position to said first position;
• and
• a housing for enclosing said motor;
• and
• a first power terminal located remotely from said housing and electrically connected to said motor for temporarily receiving a second power terminal of a portable power supply carried by a person.

A device comprising:

• a door having an open, first position and a closed, second position, with a force tending to move said door toward said second position;
• a disengageable stop connected to said door to hold said door in said first position;
• a motor connected to said door, said motor having an ability to move said door from said second position to said first position;
• a housing for enclosing said motor;
• a first power terminal located remotely from said housing and electrically connected to said motor;
• and
• a portable power supply adapted to be carried by a person having a second power terminal to temporarily connect to said first power terminal.

A device comprising:

• a door having an open, first position and a closed, second position, with a force tending to move said door toward said second position;
• a disengageable stop connected to said door to hold said door in said first position;
• a motor connected to said door, said motor having an ability to move said door from said second position to said first position;
• and
• a generator connected to said door, wherein movement of said door from said first position to said second position causes said generator to produce power to apply a braking force to slow movement of said door from said first position to said second position and to power at least one auxiliary device.

A device comprising:

• a door having an open, first position and a closed, second position, with a force tending to move said door toward said second position;
• a disengageable stop connected to said door to hold said door in said first position, said disengageable stop including:
• a brake actuator for releasing a brake upon movement of the brake actuator;
• and
• an expandable linkage having a normal length and having an elongate length when an external force is applied thereto, said linkage having a first end connected to said brake actuator and a second end for connection to a fire condition sensitive device which releases said second end upon a fire indicative condition;
• wherein said brake actuator will move to release said brake when said fire condition sensitive device releases said second end of said linkage and will move to release said brake when said linkage has its elongate length, but will not move to release said brake when said linkage has its standard length and said second end of said linkage is not released by said fire condition sensitive device;
• a generator connected to said door, wherein movement of said door from said first position to said second position causes said generator to produce power;
• a motor connected to said door, said motor having an ability to move said door from said second position to said first position;
• a first power terminal connected to said motor;
• and
• a portable power supply having a second power terminal to connect to said first power terminal.