Chemistry: analytical and immunological testing – Hydrocarbon – Total hydrocarbon – flammability – combustibility
Reexamination Certificate
2005-07-12
2005-07-12
Soderquist, Arlen (Department: 1743)
Chemistry: analytical and immunological testing
Hydrocarbon
Total hydrocarbon, flammability, combustibility
C073S025030, C374S044000, C422S094000, C422S095000, C422S096000, C422S098000, C436S137000, C436S149000, C436S151000, C436S156000, C436S157000
Reexamination Certificate
active
06916664
ABSTRACT:
A method and apparatus for sensing a flammable vapor are described herein. Initially, a first thermal conductivity of a vapor at a first temperature and a second thermal conductivity of the vapor at a second temperature can be determined. Thereafter, a ratio of the first thermal conductivity signal to that of the second thermal conductivity can be calculated to obtain a primary “vapor” signal. The “vapor” ratio can then be compared to an “air” ratio of air without the vapor at the first temperature and the second temperature to obtain a secondary signal thereof. Such a secondary signal can then be compared to an alarm set-point value to thereby determine whether the vapor comprises a flammable vapor and a risk-reducing action thereof be taken.
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Bonne Ulrich
Gehman Richard W.
Honeywell International , Inc.
Lopez Kermit D.
Ortiz Luis M.
Ortiz & Lopez PLLC
Soderquist Arlen
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