Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1989-05-15
1990-10-30
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340627, 364200, 356 37, 356437, 356438, 356439, 7386301, 7386323, 250335, 250573, G08B 2100, G08B 1710
Patent
active
049671871
ABSTRACT:
Method and apparatus for sampling the gaseous medium of a zone or area to determine the concentration, or changes in concentration, of submicron particles suspended in the gaseous medium of that area or zone using an elongated cloud chamber. A light source and a phototransistor are disposed in the cloud chamber and spaced apart so as to be electronically responsive to varying levels of light. A microprocessor is connected to a programmable memory EPROM and has pre-programmed data instructions on particle concentration levels. The EPROM sequences the microprocessor to operate the valves that sequentially sample the gaseous medium in the cloud chamber, and opens the exhaust valve in the cloud chamber to create a condition of reduced gas pressure therein. The sample of gaseous medium containing submicron particles then precipitates or condenses a portion of the cloud in the chamber in proportion to the concentration of the particles. The phototransistor measures the change in light intensity due to the concentration of the particles. A data storage device records each of the particle concentration levels sensed and measured in the zone so dangerous levels of gas concentrations can be detected in the area or zone being treated.
REFERENCES:
patent: 3654439 (1972-04-01), Estelle
patent: 3678487 (1972-07-01), Ludewig, Jr.
patent: 3800288 (1974-03-01), Russell
patent: 4764758 (1988-08-01), Skala
patent: 4786472 (1988-11-01), McConnell
Dumas Jerome E.
Harris, Jr. Eric W.
MacDougal John G.
Negash Kinfe-Michael
Orsino Joseph A.
Research Equipment Corporation
LandOfFree
Method and apparatus for particle concentration detection using does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for particle concentration detection using , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for particle concentration detection using will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-277319