The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1994
Filed:
Oct. 19, 1992
Karl L Borneman, Loveland, OH (US);
Douglas A Jaeger, Cincinnati, OH (US);
George P Egan, Union, KY (US);
General Electric Company, Cincinnati, OH (US);
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.