Abstract: In an intake manifold of an internal combustion chamber comprising a surge tank assembly and intake pipe assembly, a seal member is interposed between the end surface of the intake pipe assembly and the mating surface of the surge tank assembly so as to seal off the intake passage and mounting holes individually. Thus, the seal member, combined with the use of the blind threaded holes for the threaded bolts joining the two parts, ensures the sealing of both the intake passages and mounting holes at the interface between the end surface of the intake pipe and the mating surface of the surge tank assembly in a both reliable and simple manner. Preferably, the seal member comprises an O-ring made of elastomeric material, and at least one of the mating surface and end surface is provided with a groove for receiving the seal member.

Abstract: A memory cell array configured using static memory cells is provided with pre-amplifiers each of which receives a signal of a memory cell, which is read into each complementary bit line pair, and a main amplifier which receives a signal outputted from each of the pre-amplifiers. The number of the plurality of memory cells connected to the complementary bit lines is restricted in such a manner that the amplitude of the signal read into each complementary bit line pair, which is supplied to the input of the pre-amplifier, becomes greater than that of a signal outputted from the pre-amplifier during a period of from the selection of a word line to the start of the operation of the main amplifier.

Abstract: A memory cell array configured using static memory cells is provided with pre-amplifiers each of which receives a signal of a memory cell, which is read into each complementary bit line pair, and a main amplifier which receives a signal outputted from each of the pre-amplifiers. The number of the plurality of memory cells connected to the complementary bit lines is restricted in such a manner that the amplitude of the signal read into each complementary bit line pair, which is supplied to the input of the pre-amplifier, becomes greater than that of a signal outputted from the pre-amplifier during a period of from the selection of a word line to the start of the operation of the main amplifier.

Abstract: An intake system in a V-type 4-stroke engine for an outboard engine system is provided. A crankshaft of the engine is disposed vertically, and heads of left and right banks are disposed to face rearwards. The engine is covered with an engine hood. In the intake system, an intake air inlet is provided in an upper portion of a longitudinally flat intake air dispensing box disposed between the left and right banks and a rear wall of the engine hood, and leads to an intake passageway in a throttle body. The inside of the intake air dispensing box is divided by a partition wall into first and second dispensing chambers communicating with the intake air inlet and extending longitudinally. An on-off valve is mounted on the partition wall and is capable of bringing the first and second dispensing chambers into and out of communication with each other. Intake ports are provided in the left and right banks to communicate with the first and second dispensing chambers, respectively.

Abstract: An outboard motor is provided which includes, in an engine compartment defined by an engine hood, an engine, an intake manifold including a plurality of intake branch pipes connected to a plurality of intake ports of the engine, and a throttle body connected to an intake inlet of the intake manifold. A negative pressure detection hole that opens within the intake manifold, is provided in the outer wall of the intake manifold, and a negative intake pressure sensor that is fixed to the outer wall is positioned in the negative pressure detection hole.

Abstract: An engine intake manifold is provided that can prevent fuel loss by promptly supplying to an engine the fuel that has collected on the base within an intake air distribution box. The engine intake manifold includes an intake air distribution box having an intake inlet, and a plurality of intake branch pipes made of a synthetic resin that are provided in a vertical arrangement connected to a side wall of the intake air distribution box with downstream ends connected to a plurality of funnel is formed at the upstream end of each of the intake branch pipes disposed within the intake air distribution box. A fuel collector recess is formed on the base of the intake air distribution box. A fuel draw-up hole communicating with the recess, is provided in a side wall of the lowest funnel.

Abstract: Disclosed is an apparatus for controlling a semiconductor laser module wherein despite an increase in laser driving current owing to aging of the laser module, temperature control can be performed accurately so as to render constant the actual temperature of the laser module and prevent a change in lasing wavelength that accompanies a change in temperature. The apparatus includes a photodiode for sensing optical intensity of the laser; an APC circuit for controlling driving current of the laser in accordance with an output from the photodiode; a thermistor for sensing the temperature of the laser module; an ATC circuit for driving an electronic laser-cooling device in accordance with an output from the thermistor; and a current-quantity sensing circuit, which is connected to the APC and ATC circuits, for sensing the driving current of the laser output from the APC circuit.

Abstract: A temperature-controlled semiconductor laser apparatus includes a semiconductor laser element, an optical fiber, a temperature controller, a thermistor, and a package. The semiconductor laser element emits a laser beam. The optical fiber receives the laser beam emitted from the semiconductor laser element. The temperature controller cools and heats the semiconductor laser element to keep the semiconductor element at a preset temperature. The thermistor detects an ambient temperature of the semiconductor laser element. The package accommodates at least the semiconductor laser element and the temperature controller in a sealed state and having the thermistor mounted on an inner wall of the package.

Abstract: A semiconductor laser unit includes a semiconductor laser device, a first temperature detector that detects a temperature in the vicinity of the semiconductor laser device, and an electronic cooler that heats or cools the semiconductor laser device. The semiconductor laser unit also includes first and second branching devices for extracting first and second branched lights from an oscillation light outgoing from the semiconductor laser device, a band pass filter that transmits only a light of a predetermined wavelength band among the first branched light, and an optical filter that transmits the second branched light so that a transmission loss is increased or decreased in one way with a change of the wavelength within a wavelength band where the oscillation wavelength of the semiconductor laser device can be changed, to output a second monitor light.

Abstract: In a light emitting array module comprising light emitting elements arranged in an array fashion, the light emitting elements can be used selectively by monitoring drive states of the light emitting elements if necessary. A plurality of light emitting elements arranged in parallel are coupled to an optical fiber array via an optical switch which can switch optical paths of emitted light. Besides, the optical switch is provided with a light receiving element coupled to a remaining output port thereof in addition to the optical fibers. Optical paths of lights emitted from the light emitting elements are switched by the optical switch, and an optical signal is converted into an electric signal by the light receiving element to monitor light emitting states of the light emitting element. Drive state of the corresponding light emitting element is controlled by the electric signals.

Abstract: In a hot-dip zinc-coated steel sheet exhibiting excellent press die sliding characteristics and obtained by performing a molten galvanization and then skin pass rolling on a surface of the steel sheet, a galvanized layer has a three-dimensional average surface roughness ranging from 0.7 .mu.m to 1.4 .mu.m, and a skewness (S) of the amplitude probability distribution of the surface roughness, which is defined by the following equation (1), ranging from 0.1 to -0.3:S=.mu..sub.3 /.sigma..sup.3 (1)where.mu..sub.3 : Three-dimensional moment of the amplitude probability density.sigma.: Standard deviation of the amplitude probability density.

Abstract: An array of optical semiconductor devices, an array of lenses and an array of optical fibers are serially arranged in light propagation direction to provide a light axis alignment. At light input ends of the optical fibers, a light shielding plate is positioned. The light shielding plate is provided with light apertures corresponding to light input facets of the optical fibers to decrease leakage light interference between adjacent optical fibers.

Abstract: A light weight formed body used for building materials, heat-insulating materials, furnitures, backing materials and the like, and a method for producing the same. In the light weight formed body and in the manufacturing method thereof, the principal material is a surface-reformed slag of which the reforming involves reforming through the dissolution reaction and the hydration reaction of glass and the reforming through dehydration of the surface-reformed slag above mentioned under heating, and one or more of a polymer dispersion, a reinforcing fiber, a coagulant, a light weight aggregate, a thickener, a dispersing agent, a pigment, a synthetic pulp, a needle- to fiber-shaped calcium silicate hydrate and a hydraulic gypsum are further used together with the above principal material.

Abstract: An engine for an outboard engine assembly includes a cylinder block with at least one horizontal cylinder defined therein, an oil pan disposed downwardly of the cylinder block, a cylinder head coupled to the cylinder block, and a head cover coupled to the cylinder head. The engine assembly also includes a valve operating mechanism chamber defined jointly between the cylinder head and the head cover, a lubricating oil supply passageway for supplying lubricating oil from the oil pan to at least the valve operating mechanism chamber, and a lubricating oil return passageway for returning lubricating oil from at least the valve operating mechanism chamber to the oil pan. The lubricating oil return passageway has openings for introducing lubricating oil from the valve operating mechanism chamber. The openings are defined in inner surfaces, respectively, of the cylinder head and the head cover which face a bottom of the valve operating mechanism chamber.

Abstract: A diversity control circuit which selects an optimum receiving signal in a diversity receiver and which corrects receiving signal levels in such a manner that characteristics in measuring systems for a plurality of receiving signal levels can be regarded as homogeneous. The circuit includes memory means which stores correction data and which responds to receiving signal levels to provide corrected signals conforming to a preselected characteristic.

Abstract: A diversity control circuit which selects an optimum receiving signal in a diversity receiver and which corrects receiving signal levels in such a manner that characteristics in measuring systems for a plurality of receiving signal levels can be regarded as homogeneous. The circuit includes memory means which stores correction data and which responds to receiving signal levels to provide corrected signals conforming to a preselected characteristic.

Abstract: The invention provides a method of manufacturing a hydraulic hardening material having the steps of milling vitreous blast furnace slag and classifying the milled slag to provide slag powder having a blaine specific surface area of 6,000 to 12,000 cm.sup.2 /g. The hydraulic hardening material manufactured by the method is used as a Portland blast furance cement raw material.

Abstract: A roller burnishing device for sizing and/or finishing the external surface of a workpiece having a circular sectional contour by causing a relative rotation between the workpiece and a plurality of truncated conical rollers arranged within a head having a truncated conical inner surface. In this device, the head is made nonrotatable and instead a hollow cylindrical cage supporting the rollers within the head is driven in rotation to rotate the rollers at a high speed and the rollers are caused to orbit by driving the cage in low speed rotation thereby causing the rollers to make a planetary motion within the head.

Abstract: An improved method and apparatus for winding a yarn on a package are disclosed. The apparatus comprises the package supported on a pair of cradle arms and driven by a friction roller, with a traverse guide disposed between a traverse drum and a cam plate so as to reciprocatingly traverse the yarn from one end of the package to the other. The traverse cam plate is positionally controlled to vary the width of the traverse by an arcuate cam, affixed to the cradle arm, acting on a first pivoting lever connected by a rod to the cam plate such that the width of the traverse is decreased as the package size grows. A second cam, affixed to the cradle arm acts on a second lever during an initial winding period to maintain a pivot axis of the first lever in a fixed position.

Abstract: An electrically conductive composite material having a copper core and an iron- or nickel-base alloy clad material, with the cross sectional ratio of the clad material to core satisfying the relation 0.1<Se/(Se+Scu).ltoreq.0.8 and the tensile strength P (in kg/mm.sup.2) satisfies the relation 230-1.9.times.(100Scu+2.3Se)/Se+Scu).gtoreq.P.gtoreq.80-0.4.times.(100Scu+ 2.3Se)/Se+Scu), where Se represents the cross-sectional area of the clad material and Scu represents the cross-sectional area of the copper core. The clad material may be made of iron, steel, alloyed steel, stainless steel, or a steel inner layer and a stainless steel outer layer.