Abstract: A non-cyanide molten salt bath composition and process for the carburization of objects made of ferrous metals or alloys are provided. The composition comprises a molten salt mixture, at a temperature in the range of 900.degree. C. to 1050.degree. C., of an alkali metal chloride or a mixture of alkali metal chlorides; an activator consisting of an oxygen containing strontium or barium salt; and a graphite cover. The process comprises immersing the ferrous metal or alloy part in the molten mixture at a temperature in the range of 900.degree. C. to 1050.degree. C.

Abstract: An expandable volume lavatory is enclosed by a three-panel two-position hinged door. When the lavatory is unoccupied, two adjacent panels of the door may be positioned to fit flush with the surrounding wall or enclosure. When occupied, repositioning of the third panel of the door reconfigures the door to increase available lavatory space. The expandable volume lavatory has particular utility in areas where space is at a premium, particularly on board a vehicle such as an aicraft.

Abstract: A structural panel having a core of a phenolic foam plastics material surrounded by a woven fibre cloth impregnated with a phenolic resin. In the case of large panels, internal stiffeners may be used to improve the structural rigidity. Also the panels may have an armour layer to give the panel bullet and fire resisting properties. The armour layer may be external or internal to the panel and may be for example an alumina or a ceramic tile.

Abstract: The present invention relates to an improved process for the manufacture of purified phosphoric acid from phosphate rock. According to the invention, phosphate rock is decomposed by a mineral acid selected from hydrochloric acid, sulfuric acid or mixtures thereof. The dissolution liquor obtained is reacted with a calcium-containing compound such as calcium oxide, calcium carbonate, tricalcium phosphate and fines of phosphate rock producing an aqueous solution containing monocalcium phosphate in an amount corresponding to between 0.4% to 5.5% by wt CaO. After the separation of the precipitated solids, the clarified solution is extracted by an organic solvent having the property to extract the phosphate component. The phosphoric acid is subsequently recovered from the solvent extract by known methods such as washing or distillation.

Abstract: A golf swing training apparatus and method for teaching a golfer to swing a golf club along a predetermined path whereby through repeated practice the golfer becomes habituated to swing form and body posture, the apparatus comprising a base, a timing device for emitting rhythmical tones which correspond to the various phases of a golf club swing, a guide rail for directing the movement of a golf club in a predetermined swing plane to impact a vertical planar surface of an anvil and a positioning rod for controlling the bodily movements of a golfer within a prescribed position during a golf swing.

Abstract: The flow of liquid escaping from a leak in a vessel, e.g., a pipeline, is reduced or eliminated by introducing particles into the liquid. The particles are dispersed in a slug of material of higherviscosity than the liquid in the vessel and the size of at least some of the particles is greater than that of the hole. The position of introduction of the slug is such that the slug containing the particles is carried by the liquid to the hole. The particles ar non-deformable so that they lodge in the hole without extruding through at elevated pressure and thereby seal the hole.

Abstract: A lightweight and portable volumetric spirometer for measuring the volume of and rate of flow of air inhaled by human lungs. The device includes a movable piston within a first transparent cylindrical chamber provided with calibrated markings along its surface for measuring the volume of air withdrawn from the chamber. The first chamber communicates with a breathing tube assembly through which the user inhales. The breathing tube assembly is uniquely adapted so that the inhaled air flow is divided into two fixed portions, one portion of which comes from the chamber, the other portion of which comes from a second chamber communicating with the outside atmosphere. As air is inhaled, the piston rises to a height that can be related to the total volume inhaled. Preferably, there is a counterweight in the second chamber which also rises during inhalation to counterbalance the resistance to movement of the piston and which gives an indication of the rate of inhalation.

Abstract: A casting system includes an enclosure for covering a bowl-shaped entry port to an investment cavity for use in the lost-wax casting process. A delivery system is provided for delivering an inert gas to the enclosure to displace the original atmosphere which is driven out an exit port. The gas delivery system also provides a high-pressure environment in the enclosure for forcing molten metal, contained in the entry port, to pass by sprues into the mold cavity. Induction heating is provided for melting a solid metal ingot, controlled by a timer and pyrometer to occur prior to the injection, as well as during and optionally subsequent to the injection of compressed inert gas. The casting system is particularly useful for light-weight metals which can be cast only with difficulty in a centrifuge and is also modified for application to glass ingots and metals which do not heat well by induction.

Abstract: A compact actuator is disclosed in which the motor, gear reduction and motion control functions are performed by an integral array of components. Instead of having separate interconnected units to perform these functions, the integral array compacts these functions into a single unit, allowing a reduction in the overall length and total weight of an actuator capable of a given output stroke and force.

Abstract: A synchronous world clock which allows a user to determine the exact time at any location on earth is disclosed. The clock is comprised of a planisphere of the earth, a time scale surrounding the planisphere and a drive for rotating the planisphere counterclockwise relative to the time scale once every twenty-four hours in synchrony with the rotation of the earth with respect to the sun. The planisphere is a two-dimensional map of the earth which includes an accurate north polar projection of all the earth's inhabited continents. It is divided into a plurality of time zones corresponding to the earth's twenty-four standard time zones. The time zones are marked by a plurality of corresponding time zone indicators equally spaced along the circumference of the planisphere and numbered counterclockwise from 1 to 24.

Abstract: A method for determining the stability of live foam comprises a sample pressurizing vessel connected to a sample injection chamber leading to a sample cell linked to a reference cell maintained at constant pressure. The link between the sample cell and the reference cell comprises a link fitted with a valve for initially equalizing the pressure between the two and subsequently isolating them. A differential pressure transducer is provided for determining the subsequent change in pressure of the sample with reference to the reference cell as the foam collapses.

Abstract: A method of composition is featured for performing a fluoroimmunoassay of a biological fluid sample for an immunological reactant. A conjugate of a carrier labelled with fluorophores and coupled to an immunological reactant is mixed with the sample and a known quantity of binding agent. After equilibrium is accomplished, the bound and unbound portions are separated. The carrier in a selected portion is chemically treated to liberate the fluorophores. The fluorescent level is then measured and compared with a standard.

Abstract: A rapid one step, one reagent method is disclosed for the isovolumetric sphering and fixing of whole blood erythrocytes.

Abstract: An article comprised of metal directly and adherently bonded onto a ceramic substrate, and a process for producing same, wherein the ceramic is adhesion promoted with molten inorganic compound, treated with compounds that promote adsorption of catalyst for metal deposition, and plated with metal. Uniform surface coverage with catalyst and metal is ensured by the treatment with the adsorption promoters.

Abstract: A medical apparatus for making a subject learn the method of autogenic training and thereby treat an affected disease himself is disclosed.The apparatus can provide informing signals and physical stimuli to a subject, said signals and said stimuli are generated substantially in synchronism with each other for informing the subject with stimulus timing, and applying the stimulus to a concerned part of his body, respectively. Early in the sequence of such timing, the stimulus is completely correspondingly generated with the signal, meanwhile the stimulus is sometimes absent from the correspondence with the signal. In each of the stimulus absent times a significant bio-reaction is also caused by a conditioned reflex in the subject's physiology. This reaction is substantially the same to the normal reaction in the stimulus generating time. This will be connected with the self-learning of an associated autogenic training of the subject.

Abstract: A fluid feeding apparatus can gradually elevate the head of a fluid of steam/liquid mixture by recirculating the fluid through a centrifugal pump of moderate output and an injector. The fluid ejecting out of the nozzle of the injector will entrain a steam/liquid mixture of high latent heat from a fluid intake port so that the heat energy of the condensate from the other sources can be recovered and reused. By virtue of providing a gas intake port for the injector, the fluid can be supplemented with gas wherever needed. Due to the substantial volume of the gas phase in the reservoir, the internal pressure of the reservoir will not increase drastically because of the dampering effect of the gas phase. Thus only a centrifugal pump of moderate output is needed for implementing the recirculation of the elevation of the pressure in the reservoir.

Abstract: A brushless tachometer in which output signal switching is achieved using field effect transistors and which is capable of achieving linearity over a broad range, particularly the zero speed region. According to a preferred embodiment, the brushless tachometer is operated in a current mode as part of the servo loop to substantially reduce tachometer voltage switching requirements. A ROM can be used to control commutation switching. Commutation is preferable line-to-neutral to reduce ripple.

Abstract: A high-strength, coated cemented carbide product comprising a cemented carbide substrate and a fully dense alpha aluminum oxide coating on the substrate. The coating has a thickness of from 1-20 microns and is firmly and adherently bonded to the cemented carbide substrate through a thin intermediate nonmetallic layer .[.of an iron group metal aluminate.].. The coated product combines a wear resistance substantially as high as aluminum oxide cutting materials and a transverse rupture strength of at least 150,000 p.s.i. The coated product is prepared by passing water vapor, hydrogen gas and an aluminum halide over the substate at a temperature of from 900.degree.-1250.degree. C., the ratio of water vapor to hydrogen gas being between about 0.025 and 2.0.