Chemistry: physical processes – Physical processes – Crystallization
Patent
1979-01-26
1980-09-02
Serwin, R. E.
Chemistry: physical processes
Physical processes
Crystallization
23230PC, 422 78, 422 94, 422119, G01N 3112, G01N 3322
Patent
active
042204526
ABSTRACT:
A method of detecting the presence of a foreign gas in a gaseous medium of known combustion properties uses the fact that the percentage lower or upper explosive limits (LEL or UEL) of mixtures of any flammable gas in any other gas all have approximately the same varying relationship to the percentage LEL or UEL of the mixture as a whole when a known percentage of a reference gas of known combustion properties is added to the mixture. The method comprises the steps of mixing a sample of a possibly contaminated gaseous medium with known combustion properties in a fire-safe container (12), actuating ignition means (17) in an attempt to ignite the gaseous mixture in the container (12), and using detection means (18) to detect ignition or otherwise of the gaseous mixture to enable the presence of a foreign gas above a predetermined concentration in the gaseous medium to be detected. Apparatus for use in this method comprises in combination with the fire-safe container (12), means (15) for introducing the sample of possibly contaminated gas into the container, valve means for introducing a known quantity of the reference gas into the container, and ignition and detection means (17,18) to permit and monitor attempts at ignition of the sample.
REFERENCES:
patent: 3738808 (1973-06-01), Cunningham et al.
patent: 3738810 (1973-06-01), Clinton et al.
patent: 4033897 (1977-07-01), Barnard, Jr.
Mather & Platt Limited
Serwin R. E.
LandOfFree
Detection of gases does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Detection of gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of gases will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1706878