Abstract: Certain stored program digital computer systems employ a single central memory to which requests are made for individual instruction words stored within it. Certain types of these memories employ address queues in which requests may be temporarily stored when requests come in more rapidly than the central memory can service them. A write valid memory records each central memory request and provides a status signal which can be used to prevent placing of a further request for the word at an address in the queue.

Abstract: An air throttle for an internal combustion engine having a shaft mounted butterfly vane mounted for rotation in the engine charge air inlet. The butterfly vane and shaft have an idle air bleed slot therethrough with a tubular idle valve mounted over said shaft for concentric rotation thereabout. With the butterfly vane closed for idle mode running, the idle valve is rotated between set limits to control idle air flow and idle speed. Upon rotation of the idle valve beyond the set limits, the butterfly is progressively opened for off-idle mode running speed control.

Abstract: Provided is a circuit for removing an unwanted temporal portion of an incoming signal and for differentiating that signal with respect to a reference voltage level. It includes an input for receiving the incoming signal current through an input capacitor, a differential amplifier for converting input charging current into a voltage with respect to a reference voltage, and a charging capacitor for holding a voltage level representative of the charging current supplied to the differential amplifier during times when the unwanted input signal portion is to be removed from the circuit's output. A current sink and source provides a reset period voltage charge to the input capacitor during times when the unwanted portion is to be removed from the outgoing signal. A switch responds to a reset signal immediately preceding or on the occurrence of the unwanted signal portion.

Abstract: A dual channel readback recovery circuit includes a high resolution channel and a low resolution channel and a data latch. A logical filter in one or both channels rejects signals that are followed by other signals if they are spaced apart less than the rejection time interval allowed by the code used. Polarity qualifying logic rejects signals in the channel that are not matched in polarity.

Abstract: Sorbent sheet products are prepared comprising a coherent fibrous web that includes entangled blown fibers and liquid transport fibers intermingled with the blown fibers and an array of solid high sorbency liquid-sorbent polymeric particles uniformly dispersed and physically held within the web. The particles swell upon sorption of liquid, and the transport fibers cause increased and more rapid sorption of liquid by conducting the liquid from external portions of the web to internal portions of the web.

Abstract: A phase comparator generates a reference pulse equal in duration to one bit cell, and a variable pulse having a duration representative of the duration and time displacement of the leading edge of a data pulse from the center of the bit cell. The phase comparator includes two D-type flip-flops arranged so that the variable pulse is initiated by the leading edge of the data pulse in the one bit cell, the reference pulse is initiated by the edge of the clock pulse at the end of the one bit cell, and both pulses are terminated by the edge of the clock pulse at the end of the next bit cell. Hence, only clock edges at the bounds of the bit cell affect the pulse durations and the apparatus is insensitive to clock asymmetry.

Abstract: A method of well testing, including treating, whereby a testing string including a tool bore closure valve is run into the well bore with the valve in an open mode, the string may be automatically filled, a packer may be pressure tested without cycling the tool bore closure valve, and fluids may be spotted into the testing string, displacing wellbore fluids from the bottom of the testing string, prior to running the test.

Abstract: A vent cap has a long, narrow air communication passage covering the vent outlet of a sealed disk drive. The passage reduces diffusion of water vapor into the disk drive.

Abstract: Fluoroaliphatic ether-containing carbonyl fluoride compounds are prepared by reacting a fluorinated carbonyl compound with hexafluoropropylene oxide in the presence of at least one catalyst selected from potassium iodide, potassium bromide, cesium iodide, cesium bromide, rubidium iodide, and rubidium bromide.

Abstract: A grouting composition for sealing structures to inhibit water leakage therethrough and for stabilizing soil is provided. The composition is provided as a two-part system. Part A is an aqueous solution of a hydrophililc, water soluble prepolymer having a polyether backbone and terminal active olefinic groups, the olefinic groups being connected to the polyether backbone by linking groups selected from --NH--, --CONH--, --OCONH--, and --NHCONH--, and tertiary amine catalyst. Part B is an aqueous solution of a initiator. Parts A and B are mixed and react to form a gel.

Abstract: An improved process for metallurgically bonding two layers of metal capable of forming brittle intermetallics, by means of propelling one of the layers progressively into collision along the other layer at a velocity and impact angle selected to produce a waveless, complete metal to metal bond substantially free of the formation of brittle intermetallics along the entire interfacial region of contact between said layers; and includes the welded product formed thereby.

Abstract: A probe head for vertical recording includes a U-shaped member partially surrounding the probe and a coil supported by the U-shaped member. When the coil is energized, flux from the probe is focused to the region between the legs of the U-shaped member to greatly increase flux gradient during a write operation.

Abstract: Fluorochemical biurets containing one or more monovalent fluoroaliphatic radicals having at least three fully fluorinated terminal carbon atoms and one or more biuret moieties, the radicals and moieties bonded together by hetero atom-containing or organic linking groups are provided. These fluorochemical biurets are useful in the form of aqueous dispersions or emulsions or organic solutions in the treatment of fibrous substrates, such as textile fibers, to impart oil and water repellency.

Abstract: Normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, derivatives of the poly(perfluorooxyalkylene) compositions comprising a mixture of non-peroxidic polyfluoropolyether compounds, and derivatives of the polyfluoropolyether compositions comprising functional and non-functional derivatives of the polyfluoropolyether compositions are provided. Each peroxidic poly(perfluorooxyalkylene) compound comprises a backbone of randomly distributed perfluorooxyalkylene units, represented by the formulas --CF.sub.2 O--, ##STR1## and --O--, which when bonded to and --O-- of any of the perfluorooxyalkylene units, forms a peroxy group, --O--O--, which imparts the peroxidic characteristics to the material, and backbone-pendant perfluoroalkoxy groups or perfluoroalkoxy groups substituted with one or more ether oxygen atoms, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR2## backbone units.

Abstract: A heat recovery unit for use in association with a fluid distribution system including: a heat exchanger; means to: circulate fluid through said system and to introduce fresh fluid across one end of said heat exchanger and into said system for mixing with the circulating fluid; ventilate a portion of the circulating fluid across the other end of said heat exchanger to transfer the thermal energy between said ventilated fluid and said fresh fluid so as to replenish said ventilated fluid with said fresh fluid.

Abstract: Di- and tri-substituted perfluorocycloalkane compounds which have a cyclohexane or decahydronaphthalene nucleus are provided. These perfluorocycloalkane compounds are carbonyl fluorides and derivatives thereof.

Abstract: Perfluoropolycycloalkanes are provided. These perfluoropolycycloalkanes are ring assemblies having (a) at least two perfluorinated cyclohexane rings, (b) at least two perfluorinated fused ring systems, or (c) combinations of at least one perfluorinated cyclohexane ring with at least one perfluorinated fused ring system, each perfluorinated ring or fused ring system being directly joined to another perfluorinated ring or ring system by a single bond and the ring assemblies having a total of at least 13 carbon atoms.

Abstract: This invention provides a structure for damping longitudinal vibrations in an apparatus which moves longitudinally.It employs, in a longitudinally moveable body, a structural element, slotted in the longitudinal direction, so that said structural element has relatively rigid upper and lower portions and relatively flexible flextures at the slot ends. A layer of elastomeric material covers a side of said element and a stiffening plate covers said elastomeric layer.

Abstract: A device for anchoring a chain saw machine to a workpiece to produce selected mitered cuts through the workpiece, the device including; a base member presenting clamping structure at one end thereof for clamping the base to to workpiece; and structure rotatable about a first and second axis presented at the other end, the rotatable structure including structure for releasably securing the chain saw machine thereto for selective rotation of the chain saw machine about the first axis for selecting the degree of mitered cut to said workpiece, and for rotation of the chain saw machine about the second axis for transversally cutting through the workpiece at the selected degree of mitered cut.

Abstract: A backup material for small bore drilling in hard .[.crystalline.]. materials, such as multilayer circuit boards containing polyimide/glass, polyimide kevlar or modified epoxy BT/glass, includes at least one layer of hard crystalline material. Standard LCOA material with an additional layer selected from the group comprising polyimides, fluorocarbons and high temperature polycarbonates has proven successful.