John F Loar

Title: Innovations of John F. Loar

Introduction

John F. Loar is a notable inventor based in Allentown, PA (US), recognized for his contributions to lighting control technology. He holds a total of 4 patents, showcasing his innovative spirit and technical expertise in the field.

Latest Patents

One of his latest patents is a multi-zone lighting control system, which serves as a diagnostic apparatus for use in a light dimming circuit. This invention selectively controls the current flow through a lighting load to adjust its luminous output. The dimming circuit incorporates a controllably conductive device, such as a triac, which is connectable in series between an A.C. power source and a lighting load. The control circuit responds to a dimming level control signal, allowing for the selective application of a portion of the A.C. voltage waveform to the lighting load. This adjustment is determined by a firing angle that controls the power conduction during each half cycle of the A.C. waveform. Additionally, the diagnostic apparatus includes a sensor to monitor the operating status of a component within the dimming circuit and the presence of the dimming level control signal. A logic circuit compares the sensor's output to indicate the current operating status and presence of the dimming control signal, while a status indicator provides a visual cue for any changes.

Another significant patent by Loar is a lighting dimmer designed to control the current through a lighting load. This dimmer features circuitry that applies a predetermined dimming level control signal to a control circuit in response to the absence of a dimming level control signal and the cycling OFF and ON of a circuit breaker. Furthermore, it includes voltage compensation circuitry to maintain a constant lighting load current, even during short-lived fluctuations in nominal line voltage.

Career Highlights

John F. Loar is associated with Lutron Electronics Company, Inc., a leader in lighting control solutions. His work at Lutron has allowed him to develop innovative technologies that enhance the efficiency and functionality of lighting systems.

Collaborations

Throughout his career, Loar has collaborated with notable colleagues, including Jonathan H. Ference and Donald F. Hausman. These partnerships have contributed to the advancement of lighting control technologies.

Conclusion

John F. Loar's contributions to the field of lighting control through his patents and work at Lutron Electronics Company, Inc. highlight his