Patent ID: 6484784
Filing Date: 2002-11-26
Classification: A62C,E05F,E05Y,E06B,G05B

Abstract:
A device comprising:a brake actuator for releasing a brake upon movement of the brake actuator; 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; and a solenoid including a movable plunger, said movable plunger for applying the external force to said linkage to cause said linkage to assume its elongate length and thereby cause movement of said brake actuator for releasing the brake.