Abstract: A small radio apparatus such as a pager has a printed circuit loop antenna(12) comprising a generally elongate loop formed by first and second electrical conductors(22,24) interconnected by first and second electrically conductive end portions(18,20). A fixed value high Q capacitance(26) is incorporated into the first end portion(18) and a variable capacitance(30) is incorporated in a tap(28) interconnecting the first and second conductors(22,24) adjacent to, but spaced from, the second end portion(20). The loop antenna may be fabricated from low loss material or may comprise a track or back-to-back tracks on a dielectric substrate. The loop antenna(12) may be connected directly to RF circuitry or may be coupled inductively to the RF circuitry.

Abstract: A method and apparatus for forming a shallow ditch in wood shavings on the floor of a chicken house and laying a web of paper over the ditch while forcibly pushing the central portion of the web into the ditch with the remainder of the paper disposed at the shoulders of the ditch. The apparatus includes a plow depending downwardly from a frame and a beam pivoted to the frame which supports a wheel behind the plow. A roll of paper may be carried by spindles on the frame between the plow and the wheel. The wheel, in operation, is positioned on the upper surface of a web of paper unwound from the roll to permit the roll to unwind while simultaneously pushing the paper into the ditch.

Abstract: Disclosed here is a novel method for producing bacterial endospores which can be used as biocontrol agents for nematodes. Advantageously, the novel method does not require that bacteria be grown on living nematodes. Instead, explanted nematode tissue is used as the growth medium for the bacteria. The invention further concerns novel compositions comprising spores produced using the disclosed process.

Abstract: A photocurable composition which is useful as a permanent resist in the manufacture of printed circuit boards and packages of such boards comprises a multifunctional epoxidized resin, a reactive diluent, a cationic photoinitiator and, optionally, an exposure indicator, a coating aid and a photosensitizer.

Abstract: A rotary vane compressor or vacuum pump having an extended service life in which the rotor housing is composed of cast iron, the rotor of either cast iron or powder metallurgy materials, and the associated adjacent surfaces which form the rotor chamber are coated with a material having the characteristics of plastic with respect to friction and abrasion resistance.

Abstract: 4,4'-(Hexafluoroisopropylidene) bisphonol dicyanate and related compounds have reduced dielectric constant, reduced moisture absorption, and increase Tg making such compounds especially suitable for various electronic applications, such as circuit packaging or in forming prepregs and circuit boards.

Abstract: The orientation of the alignment layer in a raster-scanned thermally addressed smectic liquid crystal display device can be chosen relative to the writing orientation to accentuate a selected characteristic. A perpendicular alignment with respect to the scan direction produces uniformly written images in both scan directions to allow high quality bidirectional writing. In a preferred embodiment the liquid crystal cell includes a liquid crystal material comprising 4-octyloxy-4'-cyanobiphenyl 37.5%, 4-decyl-4'-cyanobiphenyl 36.8% weight percent and 4-undecyl-4'-cyanobiphenyl 25.7 weight percent.

Abstract: An improved process for preparing compacts of finely divided fluorspar for metallurgical use is provided in which water, hydrated lime and molasses are added in specified ratios to fluorspar in a heated mixing vessel. The water facilitates the formation of a lime-molasses coating on the fluorspar particles and impedes reaction of the lime and molasses. The water also provides evaporative cooling of the mixture, subsequent to the mixing operation, causing the molasses to become much more viscous and, resultingly, the mixture to be much less tacky so that it can be efficiently compacted immediately. Following compaction in a compacting machine the compacts are heated in an oven to force the lime and molasses reaction to completion providing a water insoluble binder for the fluorspar particles.