Thermal measuring and testing – Thermal testing of a nonthermal quantity – Expansion or contraction characteristics
Reexamination Certificate
2006-10-10
2006-10-10
Verbitsky, Gail (Department: 2859)
Thermal measuring and testing
Thermal testing of a nonthermal quantity
Expansion or contraction characteristics
C374S187000, C374S141000, C116S216000
Reexamination Certificate
active
07118272
ABSTRACT:
Thermally reactive elements of an intumescent material that expands when heated above a trigger temperature are arranged in an enclosed space, e.g a freight compartment of an aircraft. An optical sensor in the enclosed space has a field of view encompassing the elements. An evolving fire heats one of the elements above the trigger temperature so the intumescent material expands. This expansion of the element is sensed by the optical sensor, for an early detection of the fire at temperatures substantially below 300° C. With the elements arranged in a predefined pattern, the location of the fire can be determined based on the element(s) that has/have expanded. The intumescent material may be an adhesive tape adhered onto the ceiling of the freight compartment. Light sources or optical targets arranged along lines of sight behind the elements enhance the unambiguous recognition of the thermally expanded condition of a respective element.
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Use of intumescent material as actuator for fire protection device. Schnekkenburger. Jun. 2006.
Airbus Deutschland GmbH
Fasse W. F.
Fasse W. G.
Verbitsky Gail
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