Milton J Jackson

US Patent:

41648625, Aug 21, 1979

Filed:

Nov 25, 1977

Appl. No.:

5/854817

Inventors:

Milton L. Jackson - Houston TX

International Classification:

G01N 2518

US Classification:

73 27R

Abstract:

Apparatus for measurement of gases in a multiple component gas stream or sample is disclosed. A regulated pressure system delivers the gas to N thermal conductivity type detectors utilizing wheatstone bridges. The thermal conductivity detector utilizes a resistance heated element (one leg of the bridge) which heats a chamber, and the sample flow varies the heat by thermal conduction in the chamber. The circuit creates a feedback signal for purposes of stabilizing the temperature in the chamber at a specified level. As the feedback signal is varied as a result of the change in concentration in the sample flow, this change in feedback signal is a signal which is related to the input. The apparatus utilizes N wheatstone bridges and feedback circuits for a sample gas having N constituents which are operated at N distinct temperatures relative to one another, and the respective output signals from the N detector circuits have the form of N simultaneous equations to form an output signal indicative of the gas makeup of the N gases in the sample.

Address:

9867 Amblewood Ln, Shreveport, LA 71118

Phone:

(318)6886419

VIN:

1GKDS13S572269693

Make:

GMC

Model:

ENVOY

Year:

2007