General Electric Company

Baker Hughes Holdings LLC

Troy David Hazelton

Frederick Louis Glesius

Alan Rex Hoffman

John Patrick Doyle

Benjamin John Olechnowicz

Fred Yu-Feng Chou

Jeffrey Roy Rudd

Joseph Cleary Blakemore

Frederick Louis Glesiu

A flame sensor apparatus includes a sensor assembly. The sensor assembly includes a photodiode for sensing characteristics of a flame. The photodiode outputs an electrical photocurrent. The sensor assembly includes an electrical assembly that is electrically remote from the sensor assembly. The sensor assembly includes an electric cable assembly extending from the sensor assembly to the electrical assembly. The electric cable assembly includes an electrical cable to electrically convey the photocurrent to the electrical assembly. At least the sensor assembly is configured and constructed to experience and continue to operate at a temperature at or greater than 200&#xb0; C.

High temperature flame sensor

An apparatus and method for flame sensing within a turbine. A sensor assembly, an electrical assembly and a cable assembly extending therebetween. A photodiode generates an electrical signal and the electrical assembly determines a characteristic. An inner conductor electrically connects the photodiode to the electrical assembly. A first insulating layer, with mineral insulation material, surrounds the inner conductor. An inner sheath, with electrically conductive material, surrounds the first insulating layer. A second insulating layer, with mineral insulation material, surrounds the inner sheath. An outer sheath, with an electrically conductive, metal material, surrounds the second insulating layer. The cable assembly is configured for use up to about 300 degrees Celsius or greater. The portions of the cable are constructed and configured, and connected between the sensor assembly and the electrical assembly, to enclose the inner conductor such that the inner conductor is not exposed outside of confines of the cable.

Triaxial mineral insulated cable in flame sensing applications

A cable assembly for a flame sensor apparatus includes an inner conductor electrically connected to a photodiode that generates a current. The inner conductor transmits the current from the photodiode. A first insulating layer circumferentially surrounds the inner conductor. The first insulating layer includes a mineral insulation material. An inner sheath circumferentially surrounds the first insulating layer. The inner sheath includes an electrically conductive material. A second insulating layer circumferentially surrounds the inner sheath. The second insulating layer includes a mineral insulation material. An outer sheath circumferentially surrounds the second insulating layer. The outer sheath includes an electrically conductive material. The cable assembly is for use in temperatures up to about 300 degrees Celsius or greater. A method of attaching a cable assembly for a flame sensor apparatus.

A sensor assembly for a flame sensor apparatus includes a photodiode that generates a current. The sensor assembly includes a seal assembly supporting the photodiode. The seal assembly includes an inner conductor defining an inner conductor end. The inner conductor includes an inner conductor surface disposed at the inner conductor end. The photodiode is attached to the inner conductor end of the inner conductor and to a middle conductor end of a middle conductor. The photodiode is electrically connected to the inner conductor surface. The seal assembly is triaxial so as to protect the current generated by the photodiode. The seal assembly withstands temperatures up to or greater than about 325&#xb0; C. The seal assembly forms a hermetic barrier that, with the photodiode supported within a sealed volume, limits the passage of materials/gases through the seal assembly.

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Sagamore Hills, OH, United States of America

Troy David Hazelton