Otto L Apfelbeck

Title: Otto L Apfelbeck: Innovator in Aircraft Heating Technology

Introduction

Otto L Apfelbeck is a notable inventor based in Fort Shawnee, OH (US). He has made significant contributions to the field of aircraft heating technology, holding a total of 4 patents. His innovative designs focus on improving the efficiency and effectiveness of heating systems in aircraft windows.

Latest Patents

Among his latest patents is the "Aircraft window heat controller with switched impedances." This invention features an electrical resistance heater controller that includes multiple circuit branches connected in parallel and in series with a heating element and an external AC power source. Each branch consists of a series connection of a capacitor and a solid-state switch, which are controlled by a gating device to switch during the zero crossing of the AC source voltage waveform. This design allows for precise control of the power delivered to the heating element by varying the amount of series capacitance in the circuit.

Another significant patent is the "Electrical heater controller for aircraft window heat control." This system utilizes high-frequency switching by providing a bilateral switch that is gated on and off at a frequency approximately ten times that of the source frequency. The duty cycle is determined by pulse width modulation of the high-frequency waveform, which adjusts according to the window heater temperature.

Career Highlights

Otto L Apfelbeck has had a distinguished career, primarily working with Westinghouse Electric Corporation. His work has focused on developing advanced heating solutions for aircraft, showcasing his commitment to innovation in aerospace technology.

Collaborations

Throughout his career, Apfelbeck has collaborated with notable colleagues, including Joseph M Urish and David A Fox. These partnerships have contributed to the advancement of his projects and the successful development of his patented technologies.

Conclusion

Otto L Apfelbeck's contributions to aircraft heating technology through his innovative patents demonstrate his expertise and dedication to improving safety and efficiency in aviation. His work continues to influence the industry and inspire future innovations.