David S Long

Title: David S Long: Innovator in Train Location and Control Technologies

Introduction

David S Long is a notable inventor based in Chino Hills, California. He has made significant contributions to the field of communication technologies, particularly in the area of train location and control systems. His innovative work has implications for both railroad and public transit applications.

Latest Patents

David S Long holds a patent for "Train location and control using spread spectrum radio communications." This patent focuses on communication devices and network techniques that address safety-critical operational requirements for train location and control. The system employs on-board and trackside communication radios that participate in a synchronous, time-slotted communication network. This setup provides contentionless and highly responsive access to all participants. The communication links are encrypted, validated, and error-protected, ensuring reliable and redundant information transfer among the train, trackside, and control station radios. The use of spread spectrum communication techniques allows for accurate range measurements between all participants, facilitating effective control and communication.

Career Highlights

David S Long is associated with Hughes Aircraft Company, where he has contributed to advancements in communication technologies. His work has been pivotal in enhancing the safety and efficiency of train operations through innovative communication solutions.

Collaborations

David has collaborated with notable colleagues such as Marvin D Swensen and Gregory L Mayhew, who have also contributed to the field of communication technologies.

Conclusion

David S Long's contributions to train location and control technologies exemplify the impact of innovative communication solutions in enhancing public transit safety and efficiency. His work continues to influence the industry and pave the way for future advancements.