This inventor holds 14 USPTO granted patents. Top assignees: Marsh-Mcbirney, Inc., Marsh-Mcbirnes, Inc., Other. Active years: 1977-2003.
Location History:
- Silver Spring, MD (US) (1977 - 1987)
- Buckeystown, MD (US) (1993 - 2003)
Company Filing History:
11 out of 14 
1 out of 1 
2 out of 834,411 Years Active: 1977-2003
Title: Innovations of Lawrence B Marsh
Introduction
Lawrence B Marsh is a notable inventor based in Buckeystown, MD (US), recognized for his contributions to fluid measurement technologies. With a total of 14 patents to his name, Marsh has made significant advancements in the field of flow measurement.
Latest Patents
One of his latest inventions is a magnetic flowmeter featuring a separable magnet/electrode assembly. This apparatus is designed to measure the rate of flow of a fluid in a conduit. It includes a receptor assembly positioned on the external surface of the conduit, along with a removable external connector assembly that contains an electromagnet. This electromagnet establishes a magnetic field that extends transversely across the conduit. The assembly also features a series of circumferentially arranged electrodes that can make direct contact with the fluid through sealable gland passages. The design incorporates a calibration adjustment arrangement to modify the calibration factor of the flow signal processing system based on the conduit’s cross-sectional area.
Another significant patent is an open channel flowmeter that utilizes surface velocity and lookdown level sensors. This flowmeter can be installed within a manhole without requiring the installer to enter the manhole. The sensors generate energy signal beams directed toward the fluid surface, which reflect back to the sensors. The system produces a surface velocity signal based on the Doppler frequency shift between the directed and reflected beams. Additionally, a level signal is generated by measuring the air space between the sensor and the fluid surface, allowing for accurate fluid flow calculations.
Career Highlights
Throughout his career, Lawrence B Marsh has worked with various companies, including Marsh-McBirney, Inc. His work has significantly impacted the field of fluid measurement, leading to innovative solutions that enhance accuracy and efficiency.
Collaborations
Marsh has collaborated with notable individuals in his field, including John D Wright and Donald B Heckman. These collaborations have contributed to the development of advanced technologies in fluid measurement.
Conclusion
Lawrence B Marsh's contributions to the field of fluid measurement through his innovative patents and collaborations highlight his importance as an inventor. His work continues to influence the industry and improve measurement technologies.