Deidre E Cusack

57638888, Jun 9, 1998

Jan 30, 1995

8/380644

William M. Glasheen - Derry NH
Deidre E. Cusack - Groton MA
Helmar R. Steglich - Marblehead MA
George P. Sacco - Wakefield MA

Ametek Aerospace Products, Inc. - Wilmington DE

G01J 300

250372

A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, and method for fabricating same is provided. The sensor generally comprises a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame. In a preferred embodiment, the photodiode and amplification hardware are disposed within a sensor housing and the photodiode is situated within a fuel/air premixer.

6135760, Oct 24, 2000

Dec 31, 1998

9/223997

Deidre E. Cusack - Groton MA
Keith Stebbings - Bradford NH
Leo Jubinville - Raymond NH
Jonathan Plimpton - Canterbury NH

Meggitt Avionics, Inc. - Manchester NH

F23N 508

431 79

Characteristics of a flame within a turbine or burner are determined based upon ultraviolet, visible, and infrared measurements of the flame. The measurements include a measurement of the amplitude of frequency bands that are indicative of an efficient combustion process, such as those that increase when the flame temperature increases. The measurements also include of the amplitude of frequency bands that are indicative of an inefficient combustion process, such as those that do not vary, increase a relatively small amount, or decrease when the flame temperature increases. The temperature of the flame may therefore be determined accurately, to facilitate efficient operation of the turbine or burner while minimizing polluting emissions. Contaminants in the turbine or burner are detected, and a degree of contamination measured, by detection of energy levels for particular wavelengths associated with a respective contaminant.

60711140, Jun 6, 2000

Dec 5, 1997

8/985836

Deidre E. Cusack - Groton MA
Leo Jubinville - Raymond NH
Jonathan Plimpton - Canterbury NH

Meggitt Avionics, Inc. - Manchester NH

F23N 508

431 79

Characteristics of a flame within a turbine or burner are determined based upon ultraviolet, visible, and infrared measurements of the flame. The measurements include the amplitude of frequency bands that are indicative of an efficient combustion process, such as those that increase when the flame temperature increases. The measurements also include the amplitude of frequency bands that are indicative of an inefficient combustion process, such as those that do not vary, increase a relatively small amount, or decrease when the flame temperature increases. The temperature of the flame may therefore be determined accurately, to facilitate efficient operation of the turbine or burner, while minimizing polluting emissions.

59294507, Jul 27, 1999

Oct 24, 1996

8/736192

William M. Glasheen - Derry NH
Deidre E. Cusack - Groton MA
Helmar R. Steglich - Marblehead MA
George P. Sacco - Wakefield MA

Ametek Aerospace Products, Inc. - Wilmington MA

G01J 520

250372

A high temperature gas stream optical flame sensor for flame detection in gas turbine engines, and method for fabricating same is provided. The sensor generally comprises a silicon carbide photodiode and silicon carbide based amplification hardware for generating a signal indicative of the presence of the flame. In a preferred embodiment, the photodiode and amplification hardware are disposed within a sensor housing and the photodiode is situated within a fuel/air premixer.