Merle R Swinehart

Title: Merle R Swinehart: Innovator in Multiplexing and Control Systems

Introduction

Merle R Swinehart is a notable inventor based in Brookfield, WI (US), recognized for his contributions to multiplexing systems and solid-state control technologies. With a total of 3 patents, Swinehart has made significant advancements in industrial control applications.

Latest Patents

One of his latest inventions is the 3-Wire Multiplexer. This invention provides a 3-wire multiplexing system that exhibits high noise immunity, making it particularly suitable for industrial control applications. The system features a master station that supplies AC power, along with clocking and synchronization information, to multiple remote transmitter and receiver stations. A 3-wire cable connects the master station to the remote stations, where two wires serve as power lines, L1 and L2, isolated from each station by respective transformers. The third wire acts as a data line, optically coupled to the remote stations, ensuring complete isolation while still being powered and synchronized without local power supplies or clocks. The signaling method enhances data security by recognizing both the polarity and position of a pulse on the data line within an AC cycle. Additionally, the system includes diagnostics in remote receivers, such as half-cycle polarity and position decoding, error detection, and fail state selection.

Another significant patent is the Two-Wire Pilot Device Solid State Control System. This invention utilizes current levels as signals for implementing solid-state control systems. It supports a variety of alternative pilot devices, including flag-type limit switches, magnetic-type proximity switches, capacitance-type proximity switches, and temperature-responsive switches, which can serve as logic inputs based on two intermediate current levels. The system is capable of detecting shorted and open lines through zero voltage and zero current levels, respectively. Furthermore, it allows for various outputs, including logic and relay outputs, and can be modified to include tachometer and motion transducer systems.

Career Highlights

Throughout his career, Merle R Swinehart has worked with prominent companies such as Cutler-Hammer, Inc. and Eaton Corporation. His experience in these organizations has contributed to his expertise in developing innovative control systems.

Collaborations

Swinehart has collaborated with notable coworkers, including David L Schieble and Walter L Rutchik, further enhancing his contributions to the field of technology and innovation.

Conclusion