Costandy S Saba

US Patent:

57085072, Jan 13, 1998

Filed:

Apr 15, 1996

Appl. No.:

8/632210

Inventors:

Robert L. Wright - Dayton OH
Costandy S. Saba - Springfield OH
David W. Johnson - Yellow Springs OH
James D. Wolf - Kettering OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01N 2172
G01N 2174

US Classification:

356417

Abstract:

System and method for temperature resolved molecular emission spectroscopy of solid, liquid or gaseous materials are described wherein a sample is vaporized and decomposed, and the vaporous sample is transported into a combustion flame; a spectrum of intensity of the optical emission from the flame at a selected wavelength versus temperature of the sample define molecular peaks which are characteristic of the sample material and allows both qualitative and quantitative analysis of the sample.

US Patent:

44488874, May 15, 1984

Filed:

Sep 30, 1982

Appl. No.:

6/429939

Inventors:

Robert E. Kauffman - Kettering OH
Wendell E. Rhine - Dayton OH
Costandy S. Saba - Springfield OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01N 2171
G01N 3320
G01N 3328

US Classification:

436 60

Abstract:

The degree of wear metal contamination in an oil is determined by treating a sample of the oil with a mixture of HF/HCl/nitric acid, diluting the oil/acid mixture with a solvent mixture consisting of a nonionic surfactant and a diluent, and spectrometrically analyzing the resulting diluted mixture. Severe wear in an oil wetted apparatus may be detected by directly analyzing spectrometrically a sample of the oil and comparing the results of such analysis with the results obtained according to the acid dissolution method described above.

US Patent:

58892001, Mar 30, 1999

Filed:

Aug 30, 1996

Appl. No.:

8/707966

Inventors:

Phillip W. Centers - Dayton OH
Costandy S. Saba - Springfield OH
James D. Wolf - Kettering OH

Assignee:

The University of Dayton - Dayton OH

International Classification:

G01N 2702
G01N 3326

US Classification:

73 5301

Abstract:

The present invention relates to a method and apparatus which can be used to detect the abnormal operating condition of equipment, such as engines and machinery, the usefulness of the fluid, and the content of wear metals and elemental constituents in the fluid. The method comprises the steps of bringing at least two electrodes into contact with a sample of a fluid to be analyzed; applying a square voltage wave form to the electrodes at a predetermined scan range and scan rate to cause a current to flow between the electrodes; monitoring the current at the electrodes to determine a current output signal; using the current output signal to measure the conductivity of the fluid; and analyzing the sample to determine a content of wear metals and elemental constituents in the sample.