Thomas Lawson

US Patent:

40424650, Aug 16, 1977

Filed:

Aug 25, 1976

Appl. No.:

5/717645

Inventors:

William H. Morong - Perry ME
Thomas E. Lawson - Denver CO

Assignee:

Lexington Instrument Corporation - Waltham MA

International Classification:

G01N 2746

US Classification:

204 1T

Abstract:

An electrical system for automatically measuring, computing and indicating the oxygen content in a sample of fluid, using a galvanic cell that absorbs and consumes the oxygen from the sample, produces controlled current pulses of given duration that are conducted by the cell as necessary to maintain the cell voltage constant and these pulses are counted during controlled intervals and the count is displayed as a representation of the oxygen content of the sample.

US Patent:

40850242, Apr 18, 1978

Filed:

Aug 26, 1976

Appl. No.:

5/717771

Inventors:

Thomas E. Lawson - Denver CO

Assignee:

Lexington Instrument Corporation - Waltham MA

International Classification:

G01N 2746

US Classification:

204195R

Abstract:

The electrode assembly of a galvanic cell for detecting and measuring small amounts of oxygen absorbed by the assembly is a symmetrical sandwich mounted on an anode plate or blade and including contiguous with the blade on each side thereof a porous anode carrying an anode material such as cadmium covered with a sheet of non-reticulated, porous, non-conductive, electrolyte retentive material wrapped around the blade, a cathode conductor strip wrapped around the sheet of electrolyte retentive material, a sheet of porous cathode material, such as graphite cloth wrapped around that and secured in place and the assembly is immersed in electrolyte, electrically charged and sealed inside an oxygen-free envelope.