Company Filing History:
Years Active: 1996
Title: The Innovative Mind of John Dullighan
Introduction
John Dullighan is a notable inventor based in Yardley, PA (US). He has made significant contributions to the field of coin validation technology. His innovative approach has led to the development of a unique patent that enhances the functionality of coin-operated machines.
Latest Patents
John Dullighan holds a patent for a "Coin Validating Apparatus and Method." This invention involves a coin validating system that is typically used in coin-operated machines. The system electrically couples a stationary coin to the tuning coils of an oscillator circuit. While the coin remains stationary and the oscillator is tuned to a first rest frequency, the output frequency and output amplitude of the oscillator are measured. The presence of the metal coin increases the signal frequency from its rest frequency and decreases the signal amplitude from its rest amplitude. Frequency and amplitude are measured and compared with expected parameters of a valid coin. If a match is made, the rest frequency of the oscillator circuit is changed. At the second test frequency, signal frequency and amplitude are measured and compared with expected frequency and amplitude parameters for a valid coin. Only if a match is made at both the high frequency and the low frequency is an accept gate actuated.
Career Highlights
John Dullighan is currently employed at Greenwald Industries, Incorporated, where he continues to innovate and develop new technologies. His work has significantly impacted the efficiency and reliability of coin-operated systems.
Collaborations
John has collaborated with talented individuals such as Ilia Kirshner and Gerald Smith, contributing to a dynamic work environment that fosters innovation.
Conclusion
John Dullighan's contributions to coin validation technology exemplify the spirit of innovation. His patent reflects a deep understanding of electronic systems and their applications in everyday machines.