Douglas A Jaeger

US Patent:

53158610, May 31, 1994

Filed:

Oct 19, 1992

Appl. No.:

7/963194

Inventors:

George P. Egan - Union KY
Karl L. Borneman - Loveland OH
Douglas A. Jaeger - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

G01M 326

US Classification:

73 37

Abstract:

A method and apparatus for detecting defects in a structure formed of a honeycomb matrix bonded to a support surface including providing a probe body including means defining a fluid passage forming a supply port to an exterior surface of the probe body; connecting a pressurized fluid source to the fluid passage at a location distal from the supply port; placing the supply port in close proximity to a cell of the honeycomb matrix; supplying fluid from the compressed fluid source to the cell via the fluid passage; and monitoring a fluid pressure produced at a portion of the honeycomb matrix adjacent to the supply port to detect disbonds between the honeycomb matrix and support surface.

US Patent:

52754898, Jan 4, 1994

Filed:

Oct 19, 1992

Appl. No.:

7/963293

Inventors:

Karl L. Borneman - Loveland OH
Douglas A. Jaeger - Cincinnati OH
George P. Egan - Union KY

Assignee:

General Electric Company - Cincinnati OH

International Classification:

G01N 2500
G01K 114

US Classification:

374153

Abstract:

An apparatus and method for inspecting the bonding between a cell structure having a multiplicity of cells which are open at one end and bonded at an opposite end to a substrate are disclosed. The apparatus includes a heater and nozzle arrangement for directing a fluid, such as heated air, having a selected temperature, substantially different from ambient, into the open ends of the cell structure to cause a change in the temperature of the cell structure and radiance therefrom. A sensor is provided for sensing the temperature of the cell structure along the extent thereof or a detector may be provided for detecting the radiance along the cell structure. The temperature sensor or radiance detector generate electrical signals representative of either the temperature sensed or the radiance detected; these electrical signals are electronically converted to an image representative of either the temperatures sensed along the cell structure or the radiance detected from the cell structure to permit detection of any disbonded or plugged cells by differences between either the temperatures sensed or radiance detected along the cell structure. In another embodiment of the present invention, the output of the temperature sensor or radiance detector may be coupled to an alarm to provide a signal if the temperature or radiance varies outside of a predetermined range.

US Patent:

54191815, May 30, 1995

Filed:

Jan 10, 1994

Appl. No.:

8/178701

Inventors:

George P. Egan - Union KY
Karl L. Borneman - Loveland OH
Douglas A. Jaeger - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

G01N 3300

US Classification:

73 37

Abstract:

A method and apparatus for detecting defects in a structure formed of a honeycomb matrix bonded to a support surface including providing a probe body including means defining a fluid passage forming a supply port to an exterior surface of the probe body; connecting a pressurized fluid source to the fluid passage at a location distal from the supply port; placing the supply port in close proximity to a cell of the honeycomb matrix; supplying fluid from the compressed fluid source to the cell via the fluid passage; and monitoring a fluid pressure produced at a portion of the honeycomb matrix adjacent to the supply port to detect disbonds between the honeycomb matrix and support surface.