Abstract: A distribution network for a modified space-fed phased array antenna consists of a planar array of radiating slots distributed along a coplanar wall in each of an ensemble of parallel waveguides. This waveguide ensemble is fed or excited by an orthogonal waveguide or waveguides, through a row of slots in a wall common to the excitation waveguides and the parallel waveguide ensemble, one slot per waveguide. A predetermined amplitude distribution is achieved in the plane parallel to the axis of the exciting waveguide by adjusting the coupling value of each exciting slot, and in the orthogonal plane by adjusting the displacement of the radiating slots from the center line of the waveguides, and by adjusting slot width, length, and geometry. Such an array of slots is used to feed the inside face of a quasi-space-fed antenna array having identical, individual electronics modules.

Abstract: A ferrite device has a closed superconductor which encircles a ferrite element. The closed superconductor continuously circulates a current to produce a magnetic field for biasing the ferrite element.

Abstract: An optical encoder produces a reference signal and compensates for any instability in intensity of a light source which reads the encoder. The optical encoder comprises a movable encoding element having an analog track of variable transmissivity, and a chopping element for alternately transmitting light from the source through the analog track and around the analog track. Light transmitted through the analog track comprises an information signal and light transmitted around the analog track comprises the reference signal. The chopping element comprises an optical switch or a rotatable or stationary element havnig an alternating series of opaque and transparent sections.

Abstract: A laminar flow work table has a perforated work surface positioned and supported a predetermined distance above a floor surface. The perforated work surface is divided into sections. Each section communicates with a separate duct communicating with the perforations in its respective section and extending to a common exhaust manifold connected with a return duct in a ventilation system where the table is situated. Each section of the work surface is ventilated by drawing fluid through the perforations into the ductwork and out to the return duct through the common manifold. Each duct has a baffle which controls the flow of fluid in its respective duct which permits the ventilation in various parts of the work table to be balanced. This arrangement permits the work table to be adequately and uniformly ventilated so that noxious fluids may be effectively removed from the vicinity of the work table so that a worker is not exposed to dangerous, unpleasant, or unhealthful conditions.

Abstract: An optical backplane comprises a light source that transmits a light beam through apertures of aligned circuit cards. An optical modulator on each circuit card writes information onto the light beam. An optical demodulator on each circuit card reads information off of the light beam. The optical backplane interconnects integrated circuits of different circuit cards and minimizes misalignment problems and the likelihood of faulty connections between such circuits.

Abstract: A radar antenna element comprises a lower band waveguide and an array of parallel, dual-polarized, higher band waveguides and dipoles mounted within or directly adjacent an aperture of the lower band waveguide. The lower band waveguide and each higher band waveguide have one cross-sectional dimension less than 0.5 wavelength. A choke section, tuned dielectric or absorber isolates signals of the higher band waveguides from signals of the lower band waveguide. An array of such radar antenna elements locates a radar target with lower band signals and tracks that target with higher band signals, for instance.

Abstract: A clear, stable, and palatable liquid ibuprofen composition has ibuprofen, or a pharmaceutically acceptable salt or ester of ibuprofen, in an aqueous medium containing a methylcellulose composition. A process of making such an ibuprofen composition is significantly simpler and less expensive to carry out than prior processes of making liquid ibuprofen compositions. The liquid ibuprofen composition may also contain pharmaceutically acceptable alcohol, dispersing and suspending agents, viscosity increasing agents, flavorings, and preservatives.

Abstract: A noise-immune blood pressure measurement system filters out high frequency noise and blood pulses. The system also recognizes and filters out slow, large noise signals in the range of 0.5 Hz. Such noise signals result when a patient wearing the system makes slow, large finger movements, or is slowly transported by a vehicle over a large bump, for instance. The system accurately derives systolic, mean arterial, and diastolic pressures even when used in a noisy emergency vehicle or battlefield situation.

Abstract: A novel water soluble alkali metal salt of ibuprofen is prepared by reacting ibuprofen and an alkali metal bicarbonate in a aqueous medium. The salt is useful in treating pain, inflammation, and fever in mammals. It permits the preparation of a number of novel formulations which result in pharmaceutically and commercially acceptable dosage forms.

Abstract: A method of measuring the oil content in the gross oil production of an oil well in which the percentage of solids content thereof is known, comprises the steps of introducing a predetermined weight of well production into said vessel, determining the time interval required to introduce said predetermined weight of well production into said vessel, determining the total well production flow rate of said well production into said vessel during said time interval, electromagnetically determining the percentage water content in said well production, determining from said percentage water content the water flow rate into said vessel during said time interval, determining from said known percentage solids content the solids flow rate into said vessel during said time interval, and determining the percentage oil content in said well production by deducting said solids flow rate and said water flow rate from said total well production flow rate.

Abstract: Tiles 60 inches long fit on a wall along the length of a standard bathtub, and when cut in half, fit on walls at ends of a standard bathtub. Each tile has a lip and flange that overlap adjacent tiles in a way that makes grouting unnecessay between adjacent tiles. A mastic bead between adjacent tiles is hidden from view and seals out moisture. An edge of a tile front surface slopes down from the flange of one tile to drain moisture away from the lip and flange. The lip and flange also abut in a way that aligns one tile with another.

Abstract: A fluid responsive switching mechanism is located on a brake actuator in a vehicle to signal impending brake actuation as quickly as possible to reduce the risk of accidents such as rear end collisions. Direct contact with the brake actuator by the driver to initiate brake actuation causes the fluid responsive switching mechanism to immediately energize brake indicators upon such contact. In one example of the invention, an electric switch is located inside a fluid filled chamber located on a brake pedal in the vehicle. In a second example of the invention, an electric switch is located outside such fluid filled chamber.

Abstract: A microcomputerized electronic balance has a digital filter which filters the output of a weight transducer in the balance. The filter changes the amount of filtering in response to the resolution of a display in the balance, the desires of the user of the balance as reflected by the state of a manual data entry means manipulated by the user, and the stability of the balance. Use of such filter results in a stable display of weight related data and good response time for the display.

Abstract: A sintered powder electrode has a biochemically active layer embedded in pores of the electrode. Molecules bind to or are displaced from the biochemically active layer, which drastically changes electrical properties of the electrode. The electrode can be used in an affinity chromotography column or in a capacitive affinity sensor.

Abstract: A gauge for determining whether a conductive element, such as a cutting element, fence, gauge rod, gauge shaft, or guiding surface is oriented at a predetermined angle with respect to a reference surface is disclosed and claimed. The gauge includes an indicator, an electrical energy source, and at least one pair of contacts. When the gauge is placed on the reference surface, the contacts are abutted against the conductive element, and the conductive element is oriented at the predetermined angle, a series circuit is completed between the indicator and the energy source. As one example, the gauge can be used to ascertain the angle of a saw blade with respect to a saw table.