Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-07-12
2005-07-12
La, Anh V. (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S693600, C374S029000
Reexamination Certificate
active
06917296
ABSTRACT:
A fire heat sensor comprising a high-temperature detecting portion provided with a temperature detecting element which exhibits a fast heat response to a rise in ambient temperature, and a low-temperature detecting portion provided with a temperature detecting element which exhibits a slow heat response to a rise in ambient temperature. The fire heat sensor further comprises a resin member by which the high-temperature detecting portion and the low-temperature detecting portion are integrally formed so that heat energy is transferred from the temperature detecting element of the high-temperature detecting portion to the temperature detecting element of the low-temperature detecting portion. In the fire heat sensor, differential heat sensing is performed based on temperatures detected by the low-temperature detecting portion and the high-temperature detecting portion.
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European Search Report dated Jun. 20, 2003.
Mayusumi Kari
Shima Hiroshi
Yamauchi Yukio
Blank Rome LLP
Hochiki Corporation
La Anh V.
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