Abstract: An air flow control system for controlling the air flow within a building having closable vents for venting the air out the building comprising sensors for detecting fire, smoke, gas, or high heat in the building and an alarm for indicating the detection of fire, smoke, gas, or high heat in the building. The system also includes motors, connected to the system, for closing the vents upon the detection of fire, smoke, gas, and high heat in the building.

Abstract: A bolt lock for locking a sliding member having an aperture therein to a stationary member having an aperture therein includes a body adapted for mounting to the sliding member and the body including a guide in registry with the aperture of the sliding member. The bolt lock also includes a bolt having one end inserted through the guide for movement between a locked position of engagement in the aperture in the stationary member and an unlocked position of disengagement with the aperture in the stationary member, and a handle connected to the other end of the bolt with the handle engaging the body to lock the bolt in the locked position.

Abstract: An air flow control system for controlling the air flow within a building having a blower for recirculating the air in the building is disclosed comprising vents for venting air out of the building and means for closing the vents upon the detection of fire, smoke, or high heat in the building. The system also includes sensors for detecting fire, smoke, or high heat in the building. A breaker switch connected to the blower is also included in the system for disabling the blower to stop recirculation of the air upon the detection of fire, smoke, and high heat in the building.

Abstract: A portable door locking apparatus for use in combination with a door frame supporting a door, the frame having a latch recess for engaging a latch on an edge of the door. A planar member has an inner end adapted to be located between the door frame and the edge of the door and a free end projecting laterally from the door when the inner end is disposed between the door frame and the edge of the door. A tab projecting from the planar member is located within the latch recess to connect the planar member to the door frame so that the inner end of the planar member is located between the door frame and the edge of the door. At least one slot is located within the free end of the planar member. The slot has an edge disposed substantially parallel to the edge of the door when the planar member is connected to the door frame. A bolt having one end with a substantially, at least partially annular groove engages the edge of the slot and is adapted to be received in the slot.