Abstract: An oil containment boom comprising a plurality of sections of a lighter than water, pliable, closed-cell foam material with each of the sections having a weight positioned along one side so that when the section is placed in the water the section floats with the weighted side beneath the water and the other side of the section above the water and a plurality of couplers for flexibly joining the ends of the sections to encloses an oil containment zone.

Abstract: Relatively minute changes in magnetic field intensity are sensed by a circuit including a wire coil connected to a Hall effect element to provide the bias current to the element. The Hall effect element is disposed in the magnetic field with the coil and the output signal of the element is proportional to the square of the intensity of the magnetic field. The circuit is included in a device for measuring magnetic anomalies such as stress or corrosion cracks in structures of magnetic material including fluid transmission pipelines.

Abstract: A transient electromagnetic method for detecting irregularities on container walls by measuring wall thickness. The method utilizes a transmitting antenna and a separate receiving antenna arranged in a loop-loop configuration. The transmitting antenna induces current into the container wall and the receiving antenna and the receiver detect the decay of the induced current, which is then analyzed to detect wall thickness. A receiving antenna array of many receiving antennas is used to increase the spatial resolution. Simultaneous measurement of the induced current by the receiving antennas reduces noise that is coherent across the array. Use of a noise antenna located so as to be unaffected by the transmitting antenna further reduces noise. The received signal from the receiving antenna array is displayed on a two-dimensional display in a spatial arrangement that corresponds to the spatial arrangement of the receiving antennas.

Abstract: The invention pertains to a method and apparatus for generating and radiating electromagnetic energy for use in heating the upper atmosphere. For such an application, the cost per watt is a dominant design factor. The invention minimizes the cost per watt by minimizing the number of active devices utilized. A single active device is used to charge and discharge a short circuited antenna at a rate which is essentially the same as the antenna's resonant frequency.

Abstract: Novel organic water-soluble antimony compounds are prepared by reacting an alkoxyalkylamine with a hydroxycarboxylic acid to form an intermediate product and then reacting the intermediate product with an antimony oxide. These compounds are useful for use as catalyst metal poison passivators.

Abstract: Hydrocarbon processing equipment is protected against fouling during the processing of hydrocarbons at elevated temperatures by adding to the equipment small amounts of the N,N'-dimer of phenothiazine or a substituted phenothiazine.