Abstract: In a flowmeter, a permanent magnet is employed to apply a DC magnetic field to the liquid flowing through a pipe section. The magnet is mounted in a U-shaped housing adapted to fit over a nonmagnetic, nonconductive pipe section. Electrically conducting probes extend through the pipe section to contact liquid flowing through the pipe section at points spaced along a line perpendicular to the direction of the field applied by the magnet and perpendicular to the flow. As the magnet is brought into position over the pipe section, the approach of the magnet to the pipe section is detected by the closing of a reed switch. In response to the reed switch closing, a signal voltage proportional to the voltage across the two probes in contact with the liquid flowing through the pipe is stored on a capacitor.

Abstract: A system for recovering petroleum fluids from underwater fissures, wherein a tank formed of a cylindrical wall having a top closure and an open bottom is adapted to be positioned over the fissure on or near the bed of water without any rigid restraints. The spilled fluids from the fissure will enter the open bottom and pass upwardly toward the top closure where they are stored for later withdrawal. A method for recovering petroleum fluids from underwater fissures.