Comparative colorimeter

Optics: measuring and testing – For light transmission or absorption – Of fluent material

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

356435, 356409, C01N 2153

Patent

active

047970006

ABSTRACT:
A comparitive colorimeter for use in the field which simultaneously compares the color densities of two liquid samples and designates the degree of difference. The apparatus includes two major subsystems, optical and electronic. The optical subsystem is designed to provide identical light beams through both the sample and standard solutions and to minimize the effect which imperfect sample tubes have on the output. The electronic subsystem includes a log conversion and differential amplifier circuit for generating a difference signal representative of the difference between the optical densities of the sample and standard solutions. The difference signal is evaluated by a comparative circuit consisting of a resistive chain having a plurality of node voltages and hex inverters connected to the node voltages. The hex inverters drive a series of LED indicator lights to designate the relative degree of difference between the optical densities of the sample and standard. A correction circuit is provided for referencing the difference signal to the threshold voltage of the hex inverters and for compensating for initial differences in the optical paths of the sample and standard solutions.

REFERENCES:
patent: 2501599 (1950-03-01), Eltenton et al.
patent: 2617940 (1952-11-01), Giguere
patent: 2873644 (1959-02-01), Kremen et al.
patent: 3498719 (1970-03-01), Wing et al.
patent: 3989383 (1976-11-01), Paulson
patent: 4006990 (1977-02-01), Munk
patent: 4193694 (1980-03-01), Smith
patent: 4195932 (1980-04-01), Popelka
patent: 4310249 (1982-01-01), Kramer

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Comparative colorimeter does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-2105360

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.