Abstract: In a process for making a multi-chambered container that is lightweight, relatively inexpensive to produce, and that requires less external reinforcement against flexure than conventional multi-chambered containers do, a parison is heated and inflated to form the container. Further, first and second pinched-in areas are fashioned in the sidewall of the container. The first pinched-in area includes first and second wall portions that extend inwardly toward an interior of the main body of the container, and a first end wall portion connecting the first and second wall portions. The second pinched-in area includes third and fourth wall portions that extend inwardly toward an interior of the main body, and a second end wall portion connecting the third and fourth wall portions.

Abstract: A polycrystalline diamond cutting element has a non-planar, non-linear interface between a substrate and a table. The substrate has one or more protrusions mounted on the surface of the substrate and in spaced relationship. Each protrusion has a generally curved shape such as a delta or triangular shape that extends from the center of the substrate toward the perimeter of the substrate. The depth of the groove between protrusions generally increases along the path toward the perimeter of the element. Similarly, the depth of each protrusion from groove to groove varies along the path toward the perimeter of the element. A thicker, superhard layer such as a diamond layer is provided toward the circle of the element to increase working life. The resulting cutting element is symmetrical about the central axis to alleviate the need for proper orientation of the cutting element during assembly into a drill bit. In another embodiment, a depression is used in place of the protrusion to form a substrate.

Abstract: Switching regulator circuits and methods are provided in which a voltage controlled oscillator circuit (VCO) is utilized to produce signals that turn ON a switch circuit. The VCO is itself controlled by a phase detector circuit that compares the output of the VCO to an external synchronization signal and locks the VCO to the external synchronization signal. The switching regulator circuits also include a slope compensation circuit that derives a slope compensation signal from an oscillator ramp signal produced by the VCO. The slope compensation signal is used to modify turning the switch circuit OFF when the duty cycle of the switch circuit exceeds a predetermined value. An alternate embodiment of the present invention includes a signal generation circuit in place of the phase detector circuit. The signal generation circuit applies a waveform to the VCO to vary the voltage oscillator circuit frequency, which causes a reduction in the amplitude of noise generated by the switching regulator circuit.

Abstract: In an induction generator, an additional set of stator windings is provided, separate from and secondary to the main stator windings upon which the generator's output voltage is generated and supplied to the load. This separate stator winding is provided for the purpose of supplying the generator with the reactive electrical power it needs to maintain the rotating stator field and supplying any reactive power needed by the load. Thus, there is no need to use a capacitor assembly, for supplying the reactive power needed by the generator. Currents are injected into this separate winding in such a way that only reactive power is supplied to the generator. Specifically, a power measuring circuit measures the power in the additional set of stator windings, and a power error signal is formed by algebraically adding the outputs of the power measuring circuit.

Abstract: A method for disposing a blocking material in a cavity 38 for blocking a laser beam is disclosed. Various details of the method are developed to minimize the formation of voids in the cavity. In one embodiment, a reduced pressure is used during the method to reduce the amount of gas trapped in the cavity.

Abstract: A method for manufacturing an airfoil is provided which includes the steps of: a) providing a billet of discontinuously reinforced aluminum having at least 10 volume percent of silicon carbide as a reinforcing element, and no more than 30 volume percent of silicon carbide as the reinforcing element; 2) extruding the billet into an airfoil shaped geometry from a die, wherein the geometry includes a first wall, a second wall disposed opposite the first wall, a leading edge, a trailing edge disposed opposite the leading edge, and a first cavity disposed between the first and second walls, and the leading and trailing edges.

Abstract: A gas turbine augmentor fuel manifold is provided which includes a hollow body, a plurality of fuel valves and a cleansing port disposed in the hollow body, and apparatus for selectively admitting fuel into the hollow body. The hollow body has a forward surface and an aft surface. When the apparatus for selectively admitting fuel into the hollow body is in an off position, core gas flowing past the hollow body enters the cleansing port and purges the interior of the hollow body of residual fuel and fuel residue, thereby cleaning the hollow body.

Abstract: A control system includes a plant 56 having resonant modes and a controller 5 which receives plant input signals on lines 14,24 from the plant 56 and provides a controller output signal I, related to a filter output signal V, which controls the plant 6. The controller is provided with a non-linear notch filter 30 which receives a filter input signal x related to the plant input signals and provides the filter output signal V. The notch filter has at least one notch frequency near one of the resonant modes so as to attenuate one of the modes by a predetermined amount and has a phase lag a decade below the lowest notch frequency of said notch filter which is less than that of a corresponding linear notch filter, thereby allowing the control system 7 to exhibit faster time response and increased bandwidth than a system employing linear notch filters.

Abstract: This invention relates to a composition comprising (a) epsilon caprolactam and (b) one or more of 5-?4,5-di(3-carboxypropyl)-2-pyridyl!pentanoic acid or salt or amide, 4-?4,5-di(2-carboxypropyl)-2-pyridyl!-2-methylbutanoic acid or salt or amide, 2-?2-(2-carboxybutyl)-5-(1-carboxypropyl)-4-pyridyl!butanoic acid or salt or amide, 5-?3,5-di(3-carboxypropyl)-2-pyridyl!pentanoic acid or salt or amide, 4-?3,5-di(2-carboxypropyl)-2-pyridyl!-2-methylbutanoic acid or salt or amide, 2-?-2-(2-carboxybutyl)-5-(1-carboxypropyl)-3-pyridyl!butanoic acid or salt or amide, 5-amino-4-methylpentanamide, 4-amino-3-ethylbutanamide, 5-?4,5-di(4-hydroxybutyl)-2-pyridyl!pentanol, 4-?4,5-di(2-methoxypropyl)-2-pyridyl!-2-methylbutanol, 2-?2-(2-methoxybutyl)-5-(1-methoxypropyl)-4-pyridyl!butanol, 5-?3,5-di(4-hydroxybutyl)-2-pyridyl!pentanol, 4-?3,5-di(2-methoxypropyl)-2-pyridyl!-2-methylbutanol, 2-?2-(2-methoxybutyl)-5-(1-methoxypropyl)-3-pyridyl!butanol, 5-amino-4-methyl-1-pentanol, 5-imino-2-methyl-1-pentanamine, 5-amino-2-methyl-1-p

Abstract: A conference calling spread-spectrum communications system and method using a plurality of spread-spectrum units, any one of which may serve as the base station and where the base station may be changed from one spread-spectrum unit to another upon command. Each spread-spectrum unit includes a base subunit, a remote subunit, and a command subunit. An operator may initiate from the command subunit of a particular spread-spectrum unit, a command signal to activate the base subunit of the particular spread-spectrum unit. Upon initiating the command signal, the particular spread-spectrum unit is activated as the base station and the command signal is broadcast to the remaining plurality of spread-spectrum units.

Abstract: A method for the catalytic manufacture of MIBK and DIBK from DMK and/or IPA (optionally in the presence of water) while obtaining improved control over the ratio of DIBK to MIBK in the product stream, comprising reacting, in the presence of an aldol condensation catalyst, a reactant mixture comprising DMK and/or IPA and an effective amount of an additional reactant selected from the group consisting of mesityl oxide (MSO) and methyl isobutyl carbinol (MIBC) and mixtures thereof. Reaction temperature may also be changed to affect the product ratio obtained. The preferred catalyst is copper-based. An overall excess of hydrogen is desired, and this may be achieved by introducing or recycling hydrogen, and/or by balancing exothermic and endothermic reactions. By this invention, the product ratio of DIBK to MIBK is altered such that, as DMK and/or IPA conversion is increased, a lesser amount of DIBK than normal is produced, resulting in improved ability to control the product ratio of these materials.

Abstract: A grip held and grip operable data entry device for data collection by an operator having a hand includes a narrow grip unit for entry of data and a housing extension for carrying certain components that would otherwise have to be carried within grip unit, allowing grip unit to be narrow for comfortable and secure gripping without elimination of any desired functionality. Grip unit includes main housing having a first side and a second side, the first housing grasped by the operator's hand with the thumb extending along the first side and the middle finger engaging the second side. A housing extension extends from and is carried by main housing behind the operator's thumb such that operator support for holding device is furnished by the operator's thumb and the operator's middle finger acting upon the first side and the second side of main housing, leaving the index finger free to engage and disengage a push-button.

Abstract: A seal for a turbine blade in a gas turbine engine has a sealing portion with two subportions, where the subportions are longitudinally offset from one another, so that the seal may provide sealing for adjacent turbine blades having longitudinally offset inner platform surfaces. The offset between the sealing subportions should correspond generally to the offset between the platform surfaces.

Abstract: A capacitor is provided including first and second electrodes formed from portions of the lead frame structure used in conventional integrated circuit packaging. The electrodes are encapsulated with dielectric molding material which provides dielectric insulation between the electrodes. A low power capacitively-coupled digital isolator circuit is also provided. The circuit employs a pair of the lead frame capacitors of the present invention and includes differential driver and receiver circuits. The receiver can also include an optional filter for increasing noise and glitch immunity.

Abstract: A method for identifyng a servo track. Information from the servo track about the odd or even number of the track is combined with information about the presence or absence of a track identification area to identify the track number.

Abstract: A film comprising a blend of (i) a linear low density polyethylene and (ii) an in situ blend of copolymers of ethylene and one or more alpha-olefins having 3 to 8 carbon atoms wherein (a) the weight ratio of component (i) to component (ii) is in the range of about 0.01:1 to about 6:1; (b) the blend has been extruded, under extrusion conditions, at a die rate in the range of about 6 to about 20 pounds per hour per inch of die circumference and at a die gap in the range of about 0.020 to about 0.075 inch; and (c) the film exhibits essentially no melt fracture.

Abstract: A contact magnetic head includes a main body and at least three contact pads that contact a magnetic disk, one of which is arranged to send or receive magnetic signals from a disk. A portion of the main body situated between the contact pads has a hardness or deformation characteristic of at least 0.25 mm/kgf, thereby softening that portion of the main body to prevent vibrations of the area of the main body provided with the at least one signal sending/receiving pad.

Abstract: A phased array spread spectrum system for maximizing signal strength of a spread-spectrum signal with multipath through the use of receiving means, delaying means, combining means, despreading means, generating means, storing means and comparing means. The receiving means receives a plurality of spread-spectrum signals and a plurality of phased versions of the plurality of spread-spectrum signals. The delaying means delays the received plurality of spread-spectrum signals with respect to the plurality of phased versions of the plurality of spread-spectrum signals by a plurality of delays. The combining means combines the delayed spread-spectrum signals and the plurality of phased versions of the plurality of spread-spectrum signals as a plurality of combined signals. The despreading means despreads the plurality of combined signals as a plurality of despread signals. The generating means generates a plurality of magnitude values from the plurality of despread signals.

Abstract: An improvement in a magnetic recording medium having an underlayer and a magnetic layer is described. The improvement, effective to increase the coercivity of the medium, includes deposition of an interlayer between the underlayer and the magnetic recording layer. The interlayer is deposited to a thickness of between 10-60 .ANG. and is composed of an CoCr-based alloy having a defined saturation magnetization.

Abstract: A journal bearing designed for use with a rotatable shaft of an air cycle machine is disclosed. The bearing includes a journal bearing housing, air bearings for facilitating rotation of the shaft, and a journal bearing shell positioned in the housing. The shell includes a single piece body structure having a first half integral with a second half. The first half includes a first outside end and the second half includes a second outside end. The first half is sufficiently spaced from the second half for supporting and aligning the air bearing for supporting the rotatable shaft. The first and second integral halves define a continuously formed inner diameter adapted to receive the air bearings between the rotatable shaft and the inner diameter for facilitating rotation of the shaft relative to the body structure.