Sample evaluation by dust measuring

Details Sample evaluation by dust measuring Sample evaluation by dust measuring

1992-06-24

1994-04-12

Rosenberger, Richard A.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01N 2153

Patent

active

053030290

ABSTRACT:
A tubular test chamber of square cross-section minimizes reflection of stray light from the interior surface of the test chamber onto the detector during measurement by an optical system which is based upon right angle light scattering by the dust particles of a test sample. A rotary solenoid is utilized to open a trap door through which a sample is dropped into the test chamber during energization so that the internal spring of the solenoid can be used to bias the door closed upon deenergization thereof. The electronic circuitry which supports the measurement process provides an output in the form of a single "characteristic number" for each sample measured and has a novel feedback circuit used in auto-zeroing of the device.

REFERENCES:
patent: 2822719 (1958-02-01), Fike
patent: 4839529 (1989-06-01), Fruengel
patent: 4993838 (1991-02-01), Tresouthick et al.
Lorenz Mebatebau Brochure, SP2 Machine, "Sedimentation Measuring Instrument of Assessing the Absence of Dust in Powders and Granules", no date.

Affiliated with

Also associated with

Rating

Sample evaluation by dust measuring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sample evaluation by dust measuring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sample evaluation by dust measuring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2102887