Company Filing History:
Years Active: 1998-2000
Title: The Innovative Contributions of Patrick J. Keegan
Introduction
Patrick J. Keegan is a notable inventor based in Schaumburg, IL (US). He has made significant contributions to the field of electronic ballasts, holding a total of 6 patents. His work focuses on enhancing the efficiency and functionality of lighting systems.
Latest Patents
Among his latest patents, one is titled "Electronic ballast deriving auxiliary power from lamp output." This invention features a variable frequency boost circuit and a driven half-bridge inverter with a series resonant, direct coupled, parallel output. The control circuit includes a variable frequency driver section, a multivibrator section, and a sensing section. The variable frequency driver changes frequency smoothly, without discontinuities. The multivibrator section acts as a switch, enabled or disabled by the sensing section to control the inverter's frequency. Lamp current is essential for the control circuit's operation. The multivibrator section also manages starting by producing an output signal with a trapezoidal envelope. In case of an arc, the control circuit quenches it, and the multivibrator periodically pulses the lamp to attempt a restart.
Another significant patent is "Electronic ballast producing voltage having trapezoidal envelope for instant start." This invention shares similar features with the previous one, including a variable frequency boost circuit and a driven half-bridge inverter. The control circuit operates in the same manner, ensuring efficient lamp operation and management.
Career Highlights
Patrick J. Keegan is currently employed at Energy Savings, Inc. His work at this company has allowed him to focus on developing innovative solutions in the lighting industry. His contributions have been instrumental in advancing electronic ballast technology.
Collaborations
Throughout his career, Patrick has collaborated with notable coworkers, including Kent E. Crouse and Ronald J. Bezdon. These collaborations have further enriched his work and contributed to the success of his inventions.
Conclusion
Patrick J. Keegan's innovative work in electronic ballasts has made a significant impact on the lighting industry. His patents reflect a commitment to improving efficiency and functionality in lighting systems. His contributions continue to influence advancements in this field.