Jun Futamura

Title: Jun Futamura and Open-Channel Flow Measurement

Introduction

Jun Futamura is an inventor associated with Yokohama, Japan, and Hokushin Electric Works, Ltd. His recorded patent concerns a magnetic current meter designed to measure liquid flow in an open channel.

Latest Patents

Futamura’s listed patent, “Magnetic Current Meter for Open Channel Flow Measurement,” describes a device that measures mean flow velocity while reducing the effect of changes in liquid level. An insulated tube is positioned across the channel, with its longitudinal axis perpendicular to the direction of flow. Inside the tube, a coil-wound rod produces an external magnetic field when energized by low-frequency alternating current. Electrodes mounted on opposite sides of the tube detect a voltage induced as the liquid moves through the field, producing a signal proportional to mean flow velocity. Because the meter extends above the channel’s liquid level, it is designed to maintain its measurement arrangement despite fluctuations in that level. Futamura is credited with 1 patent.

Career Highlights

Futamura’s documented patent work reflects an engineering focus on flow measurement and instrumentation. The described meter combines electromagnetic sensing with a physical arrangement intended to accommodate changing water levels.

Collaborations

Futamura is listed in connection with Hokushin Electric Works, Ltd. Tamotsu Kobayashi is identified as a coworker; the available information does not specify their particular collaboration on the patent.

Conclusion

Jun Futamura’s recorded invention applies electromagnetic sensing to open-channel flow measurement, with a design intended to provide a mean-velocity signal despite fluctuations in liquid level.