Company Filing History:
Years Active: 1980
Title: Innovations by John E Todd in Non-Destructive Testing
Introduction
John E Todd is a notable inventor based in Long Beach, CA (US). He has made significant contributions to the field of non-destructive testing, particularly through his innovative patent that enhances the evaluation of bondline conditions in various materials.
Latest Patents
John E Todd holds a patent for an "Apparatus and method for bond testing by ultrasonic complex impedance." This non-destructive bond testing apparatus utilizes impedance variation represented by both the phase and amplitude of the signal vector response of a sonic energy generating and receiving probe. The device is applicable to laminar, honeycomb, or fiber composite structures under test. Typical bonding methods for which this bond tester and method are applicable include adhesive bonding, diffusion bonding, brazing, resistance, and impact/friction bonding. The apparatus features a cathode ray tube that displays the tip of the vector as a bright dot, representing the impedance characteristic affected by the structure under test. A null circuit deletes the response of a non-flawed portion of the structure, allowing for the detection of flaws such as disbonds, adhesive thickness, adhesive porosity, degree of adhesive cure, adhesive strength, and forms of in-service adhesive degradation.
Career Highlights
John E Todd has made a significant impact in the field of non-destructive testing through his work at NDT Instruments, Inc. His innovative approach to bond testing has paved the way for more reliable assessments of material integrity, which is crucial in various industries.
Collaborations
Throughout his career, John has collaborated with notable colleagues, including Ronald J Botsco and Robert L Jones. Their combined expertise has contributed to advancements in non-destructive testing technologies.
Conclusion
John E Todd's contributions to non-destructive testing through his innovative patent demonstrate his commitment to enhancing material evaluation methods. His work continues to influence the industry and improve safety standards in various applications.