Abstract: The invention relates to fluid drive systems used in fluid wells and brake systems for permanent magnet wellhead direct drives. The braking controller connects or disconnects a brake resistor from a back EMF. A variable frequency drive (VFD) drives the motor and communicates with the control circuitry of the brake controller. The control circuitry monitors the brake resistor and depending on the rotational speed and direction of the motor and operating state of the VFD, disconnects or connects the brake resistor. If the direction of the motor is in reverse and above a threshold speed, it connects the brake resistor. If the direction of the motor is in reverse and below the threshold speed, the control circuitry dissipates stored back EMF through the brake controller. The amount of stored back EMF corresponds to the time to empty a pump.

Abstract: Corrosion-resistant, soft magnetic metal components manufactured by powder metallurgy and infiltration processes are disclosed. The magnetic components are manufactured by a powder metallurgy process using acicular metal particles to form a skeleton, and thermally infiltrating the skeleton.

Abstract: Corrosion-resistant, soft magnetic metal components manufactured by powder metallurgy and infiltration processes are disclosed. The magnetic components are manufactured by a powder metallurgy process using acicular metal particles to form a skeleton, and thermally infiltrating the skeleton.

Abstract: A high density metal component manufactured by powder metallurgy is disclosed. The powder metallurgy method provides metal components having a density greater than 95% of theoretical density using a single sequence of uniaxial pressing and heating. The metal components are manufactured from substantially linear, acicular metal particles having a substantially triangular cross section.

Abstract: The invention is intended for incorporation into an enclosure confining fluid about an electromagnet of the type having a core, at least one coil disposed about the core and a current source coupled to the coil to establish a magnetic field. According to the invention, at least a portion of the peripheral wall of the enclosure surrounding the core axis resides in non-parallel relationship with the axis of the core. As a result, a part of the peripheral wall portion is in closer proximity to the wire coil than the remainder of the wall portion. As a result, the heat readily conducts through the wall portion and is dissipated efficiently. The surface exposed to the atmosphere with the above construction has a greater area than would a planar wall parallel to the core axis so that heat dissipation is enhanced.

Abstract: The present invention comprises a take-up apparatus for endless belts, chains, or the like surrounding spaced pulleys or sprockets. The take-up apparatus comprises a pivotable first extendable bearing member and a second sleeve member. The first extendable member rotatably carries the shaft of one of the pulleys and the second sleeve member includes a tension adjusting mechanism. The apparatus is pivoted about a boss located on the sleeve member. Accordingly, the pulley carried by the extendable member is directly pivoted in an arc having a radius defined between the pivot axis of the apparatus and the axis of rotation of the pulley shaft. At least a portion of the sleeve member is defined by telescoping portions so that the distance between the pivot axis of the arm and the pulley shaft axis is adjustable to vary the tension on the belt.

Abstract: A lifting magnet assembly is disclosed which has a permeable magnetic case with a central core and an outer peripheral wall. Electrical winding means surrounds the coil and is inside the outer wall. A composite magnetically permeable case top is provided in the magnet assembly, the composite case top including a cast steel member and a uniform thickness top plate welded together. The composite case top is welded to the core and to the outer peripheral wall, and the cast steel member is generally in the form of a spider with a plurality of arms extending from a central annular portion. This cast steel member performs the triple function of stiffening the steel top plate, providing the connector means to the lifting chain, and providing a flux path supplemental to the top plate for the magnet flux. A single size of cast steel member may be used for a plurality of sizes of magnet assemblies.

Abstract: A lifting magnet for warm steel slabs and the like incorporating means for cooling the metallic shell of the magnet to prevent damage to coil insulation due to overheating.

Abstract: An improved magnetic structure for a magnetic ore separator has an arcuate base attached to a support which in turn is connected to end pieces which mount shaft connectors by which the magnetic structure is mounted on a shaft. A plurality of radial elements are positioned in spaced relationship between the base and an outer cover. A plurality of azimuthal elements are positioned on the base between the radial elements. A plurality of angled elements are positioned between the radial elements and the azimuthal elements. The direction of magnetization of each element is displaced angularly from that of the adjacent element in uniform increments of less than 90.degree..

Abstract: An improved mobile magnetic lifting assembly for providing magnetic pickup and release in response to hydraulic control. A hydraulic drive motor and electric generator are disposed within a housing which includes an electromagnet attached thereto. The motor drives the generator which is electrically coupled to an electromagnet. The housing includes a suspension brakcet for detachably securing the housing to the boom of a lifting apparatus, as a crane. Hydraulic connections extend through the housing to provide hydraulic motor drive control of the electrical power to the electromagnet.

Abstract: An annular flexible element is coupled between a motor-driven flange assembly and a drum mounted for rotation about a fixed shaft to provide a direct drive for a magnetic separator. The direct drive avoids the need for external belts, chains or gears, and the flexible element provides a seal between the flange assembly and the drum to provide contaminant-free operation during processing of ores and other materials.

Abstract: A magnetic separator is provided with a plurality of successively disposed magnetic field producing members with each successive field being differently oriented so as to agitate the agglomerate of magnetic and non-magnetic materials as said agglomerate is moved from one field producing member to the next. Cleats are used to assist in moving the agglomerate so that as the agglomerate is moved from one field to the next, the magnetics snap, jump or rapidly move so as to drop or release the non-magnetics trapped with the magnetics.