The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 1986
Filed:
Oct. 15, 1984
Hugh R Carlon, Edgewood, MD (US);
David V Kimball, Aberdeen, MD (US);
Robert J Wright, Joppa, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
An electrooptical system and technique for direct quantitative measurement of the mass concentration of monodisperse aerosols by means of filling an enclosed chamber with a cloud or a sequence of separate clouds of essentially transparent and spherical, aerosolized particles or droplets of known density and known or selectively controlled particle size. While within the confines of the chamber the cloud, or each of the sequence of clouds, of aerosolized particles is maintained in a homogeneous condition and irradiated with a beam of high-intensity and constant wavelength irradiation selected to possess a wavelength to particle size ratio wherein attenuation of the irradiation will be almost exclusively, if not nearly entirely, attributable to optical scattering. The mass concentration of the cloud, or each of the sequence of clouds, of aerosolized particles is directly and quantitatively measured, or monitored, as a direct function of the measured magnitude, or intensity, of the attenuated beam of irradiation transmitted through the cloud. The results provide a reliably accurate measurement to within a minimal margin of error of .+-.10% or less. The system and technique provide a relatively quick and inexpensive means and procedure for calibrating the accuracy, or efficiency of various types of aerosol sampling devices and equipment by affording a chamber from which a known volume of the cloud of monodisperse aerosolized particles may be aspirated into the sampling device or equipment while electrooptically measured. The measured results attained by use of the sampling device may then be compared for accuracy purposes with the electrooptically measured results.