Abstract: The invention relates to a method permitting ferromagnetic powders for use in heavy medium suspensions for the float-sink dressing of minerals to be readily tested as to their efficiency in magnetic separation and demagnetization. To this end, the invention provides(a) for a heavy medium suspension specimen to be removed from the purification cycle directly downstream of the magnetic separation stage, for it to be freed from impurities by decantation, and its relative sedimentation velocity to be determined with the aid of a sedimentometer;(b) for a heavy medium suspension specimen to be removed from the purification cycle downstream of the demagnetization stage, for it to be freed from impurities by decantation, and for its relative sedimentation velocity to be determined with the aid of a sedimentometer; and(c) for the heavy medium suspension specimen according to (b) to be demagnetized in a cyclicly decreasing magnetic alternating field with a maximum field strength which is 1.1 to 1.

Abstract: The invention relates to a method permitting ferromagnetic powders to be readily tested for their qualification for use in heavy medium suspensions for the float-sink dressing of minerals. To this end, the invention provides(a) for ferromagnetic powder particles with a size within the range 63 to 100.mu. to be admixed with a quantity of a glycerol/water mixture necessary to obtain a heavy medium suspension having a specific density within the range 1.45 to 1.55 g/cm.sup.

Abstract: A system and process for the safe supply, distribution, and delivery of a highly volatile and flammable liquid from a contained source of supply of the liquid remote from a closed work environment to a process area within the closed work environment includes a pipeline extending from within the contained supply to the process area within the closed work environment to provide for the delivery of the liquid from the supply to the process area. The system further includes a protective casing spaced from and completely enclosing the pipeline from a point on the pipeline adjacent the process area to a point on the pipeline closely adjacent the pipeline's entry into the closed work environment. The protective casing opens outwardly of the closed work environment to thereby trap within the space existing between the casing and the pipeline any vapors that may be escaping from the liquid within the pipeline for exhausting of the same outwardly of the closed work environment.

Abstract: Tuned rubber/viscous torsional vibration damper assemblies of the kind having a supporting rotor disk mounting an inertia mass coupled to the disk by viscous damping medium and elastic tuning spring, spacing and sealing rubber rings located in rubber ring accommodating grooves. A viscous damping medium working chamber is defined within the inertia mass radially outwardly about the rings. The rubber rings are molded and vulcanized in situ in said grooves and to the rotor disk and the inertia mass. The dampers may be provided with rubber spacer and bumper fingers extending from the rubber rings into the working chamber of the damper. The rubber rings may also be keyed to the inertia mass by means of integral lugs extending into socket apertures in the inertia mass. The dampers may be coated with a rubber skin on outside areas, the skin being connected to exposed areas of the rubber rings.

Abstract: A pressure transducer body is described which has a bore running its length and contains (a) a means for receiving a pressure transducer, (b) a fluid reservoir, (c) a stationary elastic plug member having embedded therein a T-shaped rigid pin member, and (d) a chamber for receiving a fluid under pressure. The elements of the transducer body are combined in such a way that pressures of fluids flowing into chamber (d) are accurately measured using conventional pressure transducers even at very high pressures (e.g. 20,000 psi). More importantly, perhaps, the configuration of the transducer body permits accurate pressure measurements on pressurized fluids which are corrosive and/or abrasive. This makes the pressure transducer bodies particularly useful in the oilfield service industries for measuring the pressure of acidizing or hydraulic fracturing fluids used in stimulation.

Abstract: An acoustic polarimeter for measuring the anisotropy of a sample comprises an electroacoustic transducer which transmits a high-frequency transverse acoustic wave and is fixed on a birefringent measuring plate. The acoustic wave is received by a second transducer and this latter is sensitive to the component of the wave which is parallel to the transmitted wave. Transmission devices are provided for delivering electrical signals which are frequency-modulated about a tunable mean frequency. The electrical signals applied to the second transducer are received on a zero indicator, thus permitting determination of the directions of the slow axis and fast axis of the sample as well as the angle of phase shift introduced by the sample.

Abstract: The disclosed invention, a gasometer, measures the total dissolved gas pressure in a fluid in relation to the ambient atmospheric pressure, thus determining the relative saturation of dissolved gases in the liquid. In prior devices, bubbles have caused inaccurate readings, thus requiring that an operator be present during operation to manually clear bubbles. This gasometer is an improvement over previous devices in that it allows continuous and automatic monitoring of the dissolved gas pressures in the fluid by greatly reducing or eliminating the formation of bubbles in the apparatus. The formation of bubbles is prevented by selectively pressurizing the testing chamber using inlet and outlet valves at either end to selectively vary the pressure. The gasometer containing a pressurized chamber is inserted into the fluid transport system. Located in the interior of the chamber is semipermeable tubing which allows gas to pass through to its interior, but which excludes the fluid.

Abstract: A simple, easily operated method and apparatus for determing the thickness and gas permeability of refractory coatings as such coatings are in place on foundry molds and cores. The apparatus is entirely portable, requires no connections to utility supplies such as electricity, air sources and so forth, and is hand-held during operation. The apparatus comprises a hand-held probe having an outlet orifice of known, predetermined size for making contact with the mold and a hand-held measuring unit which includes a cylinder having a gravity-actuated piston, a gas flow rate meter, and a gravity-actuated check valve. The two separate hand-held units are interconnected by flexible conduit. The cylinder and piston combination cause a flow of air at controlled pressure through the mold at the probe contact surface. In operation, the piston is actuated by inverting the hand held measuring unit and then reinverting to its normal position.

Abstract: Apparatus for testing internal pressure of a pressurized container having a ball partially extending outwardly from a ball seat includes a vise for holding the container in a fixed position and a force generating transducer arranged to provide a force proportional to the internal pressure for moving an end of a lever arm against the ball and statically holding the ball in a position substantially midway between first and second extremities of the ball seat.

Abstract: Sheet or plate stock is used as to defects by a row of ultrasonic transmitting transducers on one side and receiving transducers on the other. The transmitting transducers receive frequency-modulated signals via individual buffers, and the receiving transducers feed individual, digital amplitude envelope minima to detection circuits whose outputs are fed to a computer which also feeds operating parameters to the source for the modulated signals. Different types (autonomy) of the receiver channels are described as well as diagnostic and setup procedures.

Abstract: Empty/load control valve apparatus is proposed for use with direct release triple valves which operate by switching in an extra volume with the brake cylinder for empty loaded conditions. This improvement provides a valve operated in response to leakage away of brake cylinder pressure to enable dissipation also of the extra volume pressure to prevent brake cylinder isolation resulting from the extra volume pressure.

Abstract: A leak testing device capable of detecting and measuring gas and water leakage in valves and other parts of pressurized pneumatic and hydraulic systems is disclosed. Gas from a pressurized source is injected into the apparatus of the device and is adjusted to the desired pressure. The flow of pressurized gas is routed into either the gas test section or the water test section of the device. The test media is then routed through the proper range flow meter of the device and then through tubing into the apparatus or system to be tested for leakage. The amount of leakage will be equal to and can be measured by the reading on the flow meter instrumentation.

Abstract: A high pressure liquid chromatograph system which includes a plurality of columns and a plurality of solvent containers (reservoirs) and which are selectable by use of a select or subsystem to permit the desired measurement (analysis) to be made by the system. With this system one may conveniently use a particular solvent system and a particular column to obtain a recording which is believed to be the most definitive by the user. Selection may conveniently be made by the user or by a microprocessor in accordance with predetermined program so that a completely automated overnight analysis of large numbers of different samples may be made.

Abstract: Apparatus to detect and/or locate an inhomogeneity in a medium comprises a transducer to transmit frequency-modulated ultrasonic energy through the medium and a transducer to receive reflected energy. The transducers are connected to a phase-locked loop which maintains a required relationship between the phase of the transmitted modulation and the phase of the received modulation by adjustment of the modulation frequency. The modulation frequency adjustment is kept within predetermined upper and lower frequency limits so that the loop can lock only on to received ultrasonic energy which has travelled a distance within a predetermined region in the medium. The energy may be scanned across the region to produce a profile of the inhomogeneity, such as tissue at a certain depth within a limb.

Abstract: A method of determining the phase angle of a vibrating mechanism using line segments of selected angles. The motion of the line segments on the vibration mechanism is observed and the phase angle of the vibratory mechanism is determined using information from the observation.

Abstract: A wheel brake, particularly an overrunning wheel brake comprising a brake drum, first and second brake shoes movable in forward and rearward directions, amplifying formations arranged to cooperate with the first brake shoe and to amplify a force with which the first brake shoe is pressed against the brake drum, a displacing element for displacing the first brake shoe in the forward direction and thereby pressing the same against the brake drum with amplified pressure force, and an urging projection provided on the first brake shoe and arranged so that when the first brake shoe is displaced in the rearward direction, the projection displaces the second brake shoe which acts upon the amplifying formations and thereby the first brake shoe is again pressed against the brake drum with the amplified pressure force.

Abstract: Method and apparatus for internally applying fluid pressure in order to determine the leak resisting characteristics of pipe, by gravitating a pipe into an elongated upwardly opening trough filled with a noncompressible fluid, such as water. The pipe is supported submerged within the trough and below the liquid level thereof such that opposed seals can be lowered into the trough, reciprocated towards one another and into engagement with the opposed ends of the filled pipe. Hence, the seals isolate the pipe interior after the pipe has been filled with the non-compressible fluid. The internal pressure of the pipe is increased and held for a finite period of time, thereby determining the rate at which the noncompressible fluid escapes from the pipe interior. The seals are released from the pipe ends, the fluid drained from the pipe and back into the trough, and the tested pipe is then removed from the apparatus.

Abstract: A work feed method and apparatus for feeding workpieces to and from the die of a press comprises a feed rack having a workpiece clamping device thereon is disposed within the press gap and reciprocates horizontally between positions where it picks up pieces from a supply stage at the die and transfers them simultaneously to the die and discharge stages. The feed bar is operated by a drive unit driven by an electric motor and having a rocking arm mechanism connected to the feed bar to reciprocate the latter horizontally and a slide mechanism at each end of the feed bar to reciprocate the feed bar vertically which is operated by a camming mechanism through a ball crank device which is operated by a lift rod driven through a camming mechanism by the drive motor.

Abstract: A method and apparatus for the detection of leaks in an interconnected pipeline system are disclosed. The method involves recording flow characteristics over a specific, short time period, e.g., one-half hour daily, at control stations distributed throughout the network. By arranging the control stations in this manner, subnetworks are defined and the existence of leaks therein determined in accordance with deviations in measurements which facilitate localization procedures for the leaks. The apparatus is a well for use at the control stations immovably fixed in the network and accessible from the outside.

Abstract: A drum brake, primarily for a trailer, which gives normal braking torque in forward direction and low torque in reverse. This is achieved by having a pivoted lever acting between the one ends of two shoes remote from the ends between which the brake actuator is located. The shoes act on the lever at different effective radii and the forces applied by the shoes to the lever hold it in a first position during forward rotation, thus allowing normal braking torque, and a second position during reverse rotation which allows the ends of the shoes acted on by the actuator to move apart thus allowing a limitation of the reverse braking torque by limiting the stroke of the actuator.