Abstract: A control system for driving a variable speed AC motor employing a fixed frequency AC power source, combines pulses representative of a desired slip frequency with pulses of a frequency proportional to the speed of the motor. The combined pulses are employed with a speed command signal to set a threshold which determines the fraction of each cycle of the AC primary power which is fed to the motor. In addition, the speed and slip pulses are employed to direct the AC power to specific ones of the windings of the motor to thereby create a rotating magnetic field in the induction motor. An array of silicon-controlled rectifiers does the actual gating and an SCR protect circuit ensures that transfer of control from one SCR to another is inhibited until all current creases to flow in an SCR being extinguished. A forced commutation circuit forces the extinction of all current remaining in the last conducting SCR feeding a motor winding at the transfer time from that motor winding to the next.

Abstract: The dispenser package assembly having a hollow outer casing open at each end and an article receiving tray carried within the casing. The tray may be partially slipped out of the outer casing to expose one of the articles therein. Hinged corner portions at the top of the outer casing may be swung inwardly to retain the tray in its partially opened condition. The hinged corner portions may be restored to their original position when the tray is no longer in use, thereby enclosing the articles within the container.

Abstract: Disclosed are graphite articles impregnated with resin and having on at least a part of their surface a reinforcement of resin-impregnated fibers wherein the resin serves to integrally unite the graphite with the reinforcement. The articles are made by placing the reinforcement on at least a part of the graphite article, impregnating the resulting assembly with a heat-hardenable or thermoplastic resin and allowing the resin to harden.

Abstract: A one piece cover for a liquid container is scored to outline a tab portion in the top of the cover. Access to the liquid is provided by urging the tab portion upwardly while not disturbing the remainder of the cover. The presence of the cover does not interfere with the generally plannar shape of the cover top so that successive covered containers may be stacked one upon the other. Various tab structures are disclosed which may be opened without the user's fingers coming into contact with the liquid within the container.

Abstract: Disclosed is the radiohalolabelling of metyrapone (1-propanone-1,2-di-(3-pyridinyl)-2-methyl), an 11Beta-hydroxylase inhibitor and of related compounds to form imaging agents for the adrenal cortex. Metyrapone was selectively converted to its mono-N-oxide. 4'-Bromo-metyrapone was obtained therefrom by a three-step conversion. Exchange labelling of the latter gave radiolabelled metyrapone. Found suitable as imaging agents are .sup.77 Br-4-bromo-metyrapone; .sup.131 l-4-iodo-metyrapone; .sup.123 l-4-iodometyrapone and their corresponding metyrapoles. Mixtures of these also can be used as imaging agents.

Abstract: Apparatus for storing, transporting, and exposing photosensitive film is disclosed in which a camera supports a table along which a carriage is slidable. The carriage serves to store and feed out lengths of film into a camera exposure station. A vacuum bar is carried by the table at one end thereof so as to underlie one margin of the film. A source of vacuum is connected to the vacuum bar. A sheet of flexible plastic material overlying a translucent platen for the camera is located at the exposure station. Application of vacuum to the vacuum bar causes the film to be flattened against the platen by atmospheric pressure for film exposure.

Abstract: A distributor for dielectric liquid adapted for positioning in the irrigation or degasing round holes of machining electrodes having a body either shaped to obturate the opening or square shaped so as to leave free spaces between it and the walls of the holes. In both versions the body has an axial channel and in the first at least one slot communicating with the channel is provided with the slitted end in the working zone of the electrode. The second embodiment, useful in small electrodes, has a square body whose diagonal length is equal to the diameter of the opening in which it is to be force-fitted with the distribution of dielectric taking place through spaces left between the body and the walls of the opening.

Abstract: A control device carried beneath the fifth wheel of the tractor or truck of a tractor-trailer vehicle and coupled to the trailer, in which dangerous lateral movements of the trailer with respect to the tractor while under way are prevented by arresting means responsive to the vehicle brakes applied during the initial lateral movement of the trailer. The lateral travel of the trailer is stopped before it can reach a point beyond which it cannot be returned to a normal position and which might result in jackknifing. The device acts upon normal vehicle brake application by the driver and without regard to the direction or directions of lateral movement.

Abstract: A nail driving and recessing tool for use with percussive equipment in which the nail driving end of an elongated shaft, the opposite end of which is coupled to the percussive equipment, has an elongated sleeve yieldably carried there around and capable of limited axial movement with respect to the shaft. Suitable stops are provided on the shaft and sleeve so that the shaft can continue to drive the nail below the surface of a work piece for a predetermined limited distance to recess the nail head below the surface.

Abstract: A baseball bat having a somewhat triangular cross-sectional shape along the ball striking portion to impart stiffness and an enlarged arcuate striking face of less curvature than conventional bats to provide more contact with the ball.

Abstract: A framing device which includes a plurality of adjustable arms to tension the frame by pressing against the inner surfaces at each of the corner points and with each arm also being adjustable about a transverse plane.

Abstract: Disclosed is a combinative integrated chemical process using inorganic reactants and yielding, if desired, organic products. The process involves first the production of elemental potassium by the thermal or thermal-reduced pressure decomposition of potassium oxide or potassium sulfide and distillation of the potassium. This elemental potassium is then used to reduce ores or ore concentrates of copper, zinc, lead, magnesium, cadmium, iron, arsenic, antimony or silver to yield one or more of these less active metals in elemental form. Process potassium can also be used to produce hydrogen by reaction with water or potassium hydroxide. This hydrogen is reacted with potassium to produce potassium hydride. Heating the latter with carbon produces potassium acetylide which forms acetylene when treated with water. Acetylene is hydrogenated to ethene or ethane with process hydrogen. Using Wurtz-Fittig reaction conditions, the ethane can be upgraded to a mixture of hydrocarbons boiling in the fuel range.

Abstract: A combined mandrel and core assembly for a camera in which an elongated, cylindrical hollow core, upon which a roll of photosensitive material is carried, is supported by a cylindrical mandrel rotatably mounted within the camera. A spring loaded detent within a slot in the mandrel extends through the slot into a complimentary slot at the midpoint between the ends of the core. The mandrel slot is precisely located upon the longitudinal optical axis of the camera's image plane. The core and its photosensitive material are thereby quickly and accurately positioned along said optical axis. Different widths of photosensitive material may be used upon the same mandrel.

Abstract: A chair or similar article of furniture is disclosed in which a plurality of individually adjustable spring members are incorporated into the chair structure so that specific areas of the chair may be adjusted to conform to or correctively support portions of the body of the person placed in the chair.

Abstract: A device for mixing paint and similar thick liquids within a container in which the container is held between the jaws of a clamp and rocked back and forth by a source of power. The clamp jaws are freely mounted so that they can rotate with the container about its longitudinal axis. An inertially driven mechanism which is independent of the rocking power source serves to rotate the container about its longitudinal axis as it is rocked, thereby greatly reducing the time required to thoroughly mix the paint within the container.

Abstract: Apparatus for storing, transporting, exposing and developing photosensitive film is disclosed in which a camera supports a table along which a carriage is slidable. The carriage serves to store and feed out lengths of film into a camera exposure station. A source of vacuum acting between a sheet of flexible plastic material and a translucent platen for the camera at the exposure station causes the film to be flattened against the platen for film exposure. Thereafter, the vacuum is broken by movement of the carriage and the exposed film is urged into the nip of rollers which carry the film through a developing station supported by the table.