(under subclass 36) Subject matter wherein moisture or other liquids are deposited on particles to enlarge them or optically modify them (e.g., improve reflection) to facilitate optical study of the particles.
(1) Note. Generally the apparatus includes pump structure to deliver a gas sample containing particles, expand the sample under a constant volume to obtain a supersaturated condition with respect to the gas, deliver the expanded gas sample to a chamber to optically test the gas with moisture precipitated as a result of the gas expansion on the particles present in the gas, and exhaust the sample from the apparatus.
(2) Note. The particles examined include ionized particles and molecular types.
SEE OR SEARCH THIS CLASS, SUBCLASS:
335+, for the determining of the size of particles by optical methods.
337+, for particle light scattering generally including the concentration or number of particles by statistical methods. 437+, for transmission tests through gases for the determination of the concentration of particles present in the gases generally and visual inspection equipment.
SEE OR SEARCH CLASS
73, Measuring and Testing,
28, for the determination of the amount of solid matter in the analysis of gases generally, subclass 29 for moisture content of gases, and subclass 421 for reciprocating and rotary samplers involving gases and liquids.
340, Communications: Electrical,
227, and 237 for methods and apparatus which may involve the detection of condensation nuclei, per se, or the use of condensation nuclei to detect the dew point of gases.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,
50+, for analytical apparatus having a condensation nuclei detector.
436, Chemistry: Analytical and Immunological Testing,
1+, for processes involving the testing of condensation nuclei for traces of chemical elements wherein a chemical reaction is precedent to an optical test to determine the
