Location History:
- Tabb, VA (US) (1997 - 2012)
- Yorktown, VA (US) (2014)
Company Filing History:
4 out of 2,546 
3 out of 2,453 
1 out of 3,975 
Years Active: 1997-2014
Title: John W Simpson: Innovator in Eddy Current Technology
Introduction
John W Simpson is a notable inventor based in Tabb, VA (US), recognized for his contributions to the field of eddy current technology. With a total of 8 patents to his name, he has made significant advancements in the inspection of materials and structures.
Latest Patents
One of his latest inventions is an eddy current probe designed for surface and sub-surface inspection. This probe features an excitation coil that couples to a low-frequency alternating current (AC) source. A magnetoresistive sensor is centrally located within the excitation coil, defining the sensing end of the probe. Additionally, a tubular flux-focusing lens is positioned between the excitation coil and the sensor. This innovative design allows for effective inspection when the probe is placed adjacent to a structure's surface. Another significant patent is an eddy current system and method for crack detection, which enables the identification of sub-surface damage in cylindrical objects. This system utilizes a dual frequency, orthogonally wound eddy current probe mounted on a stepper motor-controlled scanning system, allowing for thorough inspection of outer surface damage from within the object.
Career Highlights
Throughout his career, John W Simpson has worked with esteemed organizations, including the United States of America as represented by the Administrator of NASA. His work has contributed to advancements in technology that enhance safety and reliability in various applications.
Collaborations
John has collaborated with notable individuals in his field, including Russell A Wincheski and Min Namkung. Their combined expertise has furthered the development of innovative solutions in eddy current technology.
Conclusion
John W Simpson's contributions to eddy current technology have established him as a prominent inventor in his field. His innovative patents and collaborations reflect his commitment to advancing inspection methods and ensuring the integrity of materials and structures.