Ronnie Bennett

US Patent:

6427522, Aug 6, 2002

Filed:

Feb 9, 2001

Appl. No.:

09/780730

Inventors:

Thomas J. Thomas - Lewisburg WV
Ronnie D. Bennett - Ronceverte WV

Assignee:

ABB Automation Inc. - Wickliffe OH

International Classification:

G01N 3002

US Classification:

73 2335, 95 87

Abstract:

A temperature programmed module for use in a gas chromatograph. The module has micropacked column and inner and outer jacket tubes. The inner jacket tube surrounds the column to provide a space between the that tube and the column. The outer jacket tube surrounds the inner jacket tube to provide a space between the two jacket tubes. Air which has a controlled temperature flows only in the space between the two jacket tubes when it is desired to heat the column. Air flows in both spaces when it is not desired to heat the column. The temperature of the air is controlled. The module along with the sample injection valve and flame ionization detector are in an enclosure that is not temperature controlled. The air that flows in both spaces also flows in the enclosure to keep the heat from the valve and the flame ionization detector from heating the column.

US Patent:

20160266032, Sep 15, 2016

Filed:

Mar 10, 2015

Appl. No.:

14/643129

Inventors:

- Zurich, CH
Joanna Radford Kiddle - Lewisburg WV, US
Gary Brewer - Lewisburg WV, US
Ronnie Bennett - Clintonville WV, US

Assignee:

ABB TECHNOLOGY Ltd. - Zurich

International Classification:

G01N 21/31
G01N 21/27

Abstract:

A photometer is provided for measuring the concentration of a chromophore in a fluid. The photometer includes a light source, a sample cell and a detector. The light source includes first, second, third and fourth light emitting diodes (LEDs). Each of the first and second LEDs emit light at a measurement wavelength and each of the third and fourth LEDs emit light at a reference wavelength. The first and second LEDs are arranged diagonal to each other and the third and fourth LEDs are arranged diagonal to each other. The photometer performs a routine for correcting concentration measurement for LED drift.