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:
Dec. 29, 1992
Filed:
Oct. 23, 1990
Scott M Dick, Alta Loma, CA (US);
Edward F Patterson, Redlands, CA (US);
Gerhard Kreikebaum, San Bernadino, CA (US);
Venturedyne, Ltd., West Allis, WI (US);
Abstract
The liquid nephelometer has an elongate, tubular housing for containing a liquid sample to be measured for the concentration of foreign materials, a light source located adjacent one or both ends of the housing for directing a beam of light along an axial path through the housing, a light restrictor having a aperture of reduced cross sectional area to divide the interior of the housing into a first or sensing chamber having a known volume and a second chamber and to limit the passage of the scattered light between the two chambers, and light detecting means for detecting light scattered by foreign material in the liquid present in one or both of the chambers and producing a signal representative of the concentration of such foreign material. In a preferred embodiment, the light source is located at the end of the housing including the sensing chamber, the portion of the housing including the second chamber is made from or coated with a light absorbing material and the light detector is disposed between the light source and the end of the sensing chamber, has a central opening through which the light beam passes and detects light back scattered by foreign material present in the liquid in the sensing chamber.