(under subclass 36) Subject matter wherein the means to prepare or condition includes a movable member which serves as a support to receive successively samples of particulate material from a gaseous stream or from a pulverent supply of material, the member supporting the particulate matter for the optical test.
SEE OR SEARCH THIS CLASS, SUBCLASS:
335, for the determination of the size of particles by optical procedures.
337+, for the determination of particle light scattering including polarization effects.
372+, for the mensuration of substances or articles by light tests generally.
429+, for the monitoring of webs generally.
438+, for light transmission tests of dust or smoke. SEE OR SEARCH CLASS
340, Communications: Electrical,
627+, for the testing of fluent or pulverized material in a gas or liquid wherein an electrical signal is involved.
