Abstract: The corrosion of galvanically coupled metals can be measured and monitored by linear polarization techniques using a test galvanic electrode comprising two individual electrodes of different metals preferably connected end to end with a rigid metallic fastener. The galvanic electrode is treated as a single electrode and can be used as the test electrode in any two or three electrode configuration which includes at least the test electrode and a reference electrode. A three electrode configuration, including also an auxiliary electrode, is adapted for use in combination with the PAIR meter.

Abstract: A method for separating and purifying a crystallized component from a two-phase slurry of a crystallized component in a liquified multi-component mixture, the method including a purification column capable of withdrawing the crystallized component from the slurry having multi-component mixture therewith, and passing a heated inert gas through the purification column in a direction countercurrent to the withdrawal of the crystallized component to result in a purified residue of crystallized component.

Abstract: A self-monitoring heat tracing system including a heating conductor, a monitor conductor, and a control circuit which monitors the integrity of the heat tracing conductor and provides alarm signals to indicate abnormal temperature conditions in the heating system or discontinuities in the monitor circuit.

Abstract: Method of manufacturing an acute angled vessel connector adapted to be mounted in a vessel or pipeline and to provide an angled connection from such vessel or pipeline to a branch pipe wherein the vessel connector includes a generally cylindrical main body having integrally formed therewith a contoured mounting rim, the main body having a bore therethrough which is directed at a pre-designated acute angle with respect to the annular mounting rim wherein the method includes the steps of providing an offset forging of a particular shape, machining an interior body bore on a central axis separate from the longitudinal axis of the forging itself, facing one end of the forging and milling the other end with a curved undersurface of the same radius of curvature of the vessel or pipeline in which the connector is to be mounted and thereafter completing the machining of the outside surface and otherwise forming the contoured mounting rim of a generally elliptical shape.

Abstract: A device for the trapping of snakes and similar animals having a sheet of netting to be placed on the ground shaped so that a plurality of areas of the netting are substantially non-horizontal to the ground. A snake attempting to traverse the sheet will pass into an interstices until its body size prevents forward motion. The scales of the snake will catch on the strands of the netting preventing the snake from retreating from the netting.

Abstract: Flexible hose for liquefied gases, comprising a tubular body of biaxially oriented polypropylene film (2) arranged between an inner helically wound wire (3) and an outer helically wound wire (4), said wires being wound at the same pitch but having the windings displaced by half a pitch width from each other.

Abstract: A decanting type centrifuge having a main bowl which is adapted to be rotated about its longitudinal axis and which contains a helical scroll conveyor which is arranged to rotate about the main bowl axis at a slightly different speed to the main bowl for scrolling separated solids to a solids discharge end of the bowl. The centrifuge includes a means which acts to isolate a gas volume radially inwardly of the inner liquid surface within the bowl and also a passage arrangement which enables gas to be extracted continuously from the isolated gas volume to a location external to the main bowl.

Abstract: A shock absorber assembly adapted to be used with a drill string dampening intermittent shocks and vibrational forces encountered with a drill string, the shock absorber assembly including a mandrel, a tubular body reciprocally mounted with respect to the mandrel, and a dampening device including an annular chamber adapted to be filled with a compressible fluid and a flexible wall with the mandrel adjacent the annular chamber for permitting flexure of the mandrel as needed for dampening.

Abstract: An acute angled vessel connector including a generally cylindrical main body having an interior body bore and an exterior wall which is at least in part cylindrical and a contoured mounting rim formed integrally with one end of the main body, the mounting rim being generally elliptical in configuration and being positioned at a predesignated acute angle with respect to the central axis of the interior body bore, the mounting rim being adapted for welding in a flush position in an opening in a vessel or pipe such that the generally cylindrical main body and the interior cylindrical body bore extend at a predesignated acute angle with respect to the surface of such vessel or pipeline.

Abstract: An apparatus for tensioning a stud and a method for doing same, with the apparatus including a body adapted to be removably mounted with the stud, the body including a first body member and second body member movable with respect thereto, with the second body member having a gripper assembly therewith for gripping the stud as desired, and moving means with the body for moving the second body member with respect to the first body member from a contracted position wherein the gripper assembly engages the stud and in expanded position wherein the gripper assembly tensions the stud.

Abstract: The invention disclosed is a band or layer of absorbent material which is wrapped around the outside of a liquid container to entrap and hold waste liquid dripping down the sides of the container. The absorbent material is impregnated with a neutralizing agent selected to chemically neutralize the liquid of the container and a chemical indicator which changes color as excess liquid from the container accumulates in the absorbent material.

Abstract: A clamping device secures a hydraulic hose bundle to a tubular riser system or to a wireline and comprises a generally cylindrical clamping body having an axial passage therethrough. The clamping body is formed having first and second semi-cylindrical body members and pivotal mount means provides pivotal movement of the first and second body members between an open and a closed position. First clamping means secures the first and second body members in the closed position and second clamping means releasably attaches the cylindrical clamping body to the tubular riser system or to a wireline.

Abstract: A ledge bed for use in hospitals, nursing homes and the like where it is desirable to position the ledge bed in a configuration suitable to place a bedpan or bathtub beneath a patient in bed without an attendant having to physically lift or move the patient. The ledge bed further includes inclination means for inclining head and foot mattress support sections as well as elevational means for elevating the ledge bed on telescopically connected support legs.

Abstract: A process for the preparation of pentavalent vanadium compounds by reprocessing acid extracts of vanadium-containing catalysts spent in the hydrotreatment of crude or residual oils, characterized in that extracts containing trivalent and tetravalent vanadium are oxidized at a pH between 0.5 and 2.6 with an oxygen-containing gas to form concentrates of tetravalent vanadium, after which oxidation is carried out at a pH between 2.6 and 4.0 with an oxygen-containing gas to form concentrates of pentavalent vanadium and in that solid vanadium compounds are subsequently recovered by separating them from the liquid phase.

Abstract: This invention relates to the preparation of cyclopropane carboxylic acid ester derivatives, which are useful as pesticides.There is provided a process for preparing a mixture of cis-isomers of a compound of formula ##STR1## wherein R.sup.1 and R.sup.2 are independently selected from chlorine, bromine and methyl, consisting predominantly of the 1R cis S- and 1S cis R- isomers, which process comprises dissolving a mixture of 1S cis S- and 1R cis R- isomers of the compound of formula I, alone or in the presence of 1R cis S- and 1S cis R-isomers, in an organic amine base containing from 5 to 7 carbon atoms and being a secondary amine containing two branched alkyl groups or a tertiary amine, crystallizing out from a resulting solution of cis- isomers of formula I in the organic amine base a 1:1 mixture of the 1R cis S- and 1S cis R- isomers, and evaporating off the organic amine base.

Abstract: Apparatus is described for insertion into a branch pipe to cut an aperture in a liner provided within the main pipe for repairing the latter. The apparatus has a body together with a cutting device and a clamping member (e.g. an inflatable sleeve) both supported by the body. Means are provided for actuating the clamping member so that it presses against the inside of the branch pipe and jams the body in a fixed position within the branch pipe. The cutting device may be advanced relative to the body, to cut an aperture in the liner. Also described is an inflatable plug which may be used to provide a seal so that a grouting operation may be performed without grout being able to escape into the branch pipe or into the interior of the liner.

Abstract: A tennis ball holder belt having suitable fasteners to connect the belt on a tennis player and the belt having at least two ball holder panels attached thereto. The panels can be either permanently sewn to the belt or be temporarily affixed by means of snaps or other fasteners. Each panel has pockets for holding at least six tennis balls. In the conventional pocket arrangement, each panel has three upwardly facing pockets and three downwardly facing pockets. Alternatively, elastic strips attached to the panels are used as pockets, preferably with reticulated polymer surface therein to assist in retaining the tennis balls within the elastic pocket.

Abstract: A rotating disc gate valve for controlling fluid flow in a flow line comprising a valve body having a flow passageway and a cavity transverse to the flow passageway to receive a flow control assembly. The flow control assembly includes first and second valve seat carriers each having a plurality of valve seats thereon which are aligned to form valve seat sets and an independent rotation means for rotating the valve seat carriers whereby replacement valve seats can be axially aligned with the flow passageway without dismantling the valve body. The flow control assembly includes a flow control disc mounted between the valve seat carriers.

Abstract: A method and system for installing a layered vessel wherein the method includes the steps of constructing the bottom vessel head section in an inverted position mounting the bottom head section on the vessel foundation, erecting a generally cylindrical construction frame having a plurality of annular work stations; substantially simultaneously with the erection of the cylindrical construction frame, constructing onto the bottom head a cylindrical inside shell liner and a hemispherical upper head inside liner and adding layers to the inside shell from the bottom upwardly with the addition of such layers occurring substantially simultaneously at various of the annular work stations. A system for accomplishing these steps is provided, including particular method for constructing the bottom head, and further, an annularly movable crane assembly is provided for the work stations.