摘要:
A stripline-type delay line has a plurality of rectangular sheet layers which are made from a dielectric material with a relative dielectric constant .di-elect cons.r of about 6.3, having magnesium oxide and silica as main components. One sheet layer is placed at the top, and the other layers are laminated thereunder in the following order: a sheet layer on which a first ground conductor is formed on its upper surface, a sheet layer on which a transmission line folded in a meander shape is formed on its upper surface, and a sheet layer on which a second ground conductor is formed on its upper surface. On side faces of the laminated dielectric and on adjacent portions of the upper and lower surfaces, an input terminal, an output terminal, and ground terminals are formed by printing, and then the dielectric is baked. The length A of the opposing line sections of said transmission line is preferably set such that the first peak frequency f of the delay time is within or above the frequency range of use, and substantially satisfies the following expression: ##EQU1## wherein Co indicates the speed of light, and .di-elect cons.r indicates the relative dielectric constant of said dielectric layers.
摘要:
A delay line is produced by firing a laminated body and terminals (an input terminal, an output terminal and grounding terminals) which are formed by printing or another method on the side faces, top and bottom surfaces of the laminated body. The laminated body has four dielectric rectangular sheet layers (dielectric constant .epsilon.r=approximately 6.3) containing mainly barium oxide, aluminum oxide and silica. The laminated body is formed by layering from top to bottom, in the order given, a first sheet layer, a second sheet layer which has a grounding conductor formed on its top surface, a third sheet layer which has a transmission line meanderingly formed on its top surface, and a fourth sheet layer which has another grounding conductor formed on its top surface. The transmission line has a meandering shape which defines a meander width, and has delay time peaks at respective frequencies, wherein the frequency fn at the n-th delay time peak substantially satisfies the formula: ##EQU1## where Co represents the speed of light; .epsilon.r, the dielectric constant of the dielectric layer; A, the meander width of the meanderingly formed transmission line; and n, a natural number. The transmission line may be formed by connecting in series a plurality of meanderingly formed transmission line segments having different respective meander widths. The plurality of transmission line segments may be formed opposite each other with the dielectric layer provided therebetween, the plurality of transmission line segments being connected to each other at ends thereof.
摘要:
A combustion apparatus has a fuel feed unit, a blower for supplying combustion air, a mixing unit of fuel and combustion air, a first catalyst provided downstream of the mixing unit, a first heat receiving unit adjacent to the first catalyst, a second catalyst with a large geometrical surface area than that of the first catalyst provided downstream in the flow direction of the first catalyst, an electric heater for heating the catalyst provided downstream of the second catalyst, an air permeable insulator provided downstream of the electric heater, and a second heat receiving unit provided downstream of the air permeable insulator, wherein power is supplied to the electric heater when starting combustion to heat the second catalyst over the reaction temperature of catalyst, a mixed gas of fuel and air is fed to start catalytic combustion of second catalyst, the downstream portion in flow direction of the first catalyst is heated over the reaction temperature of catalyst by the combustion heat of the second catalyst, and combustion is started by the first catalyst.
摘要:
A wheel assembling apparatus for assembling different types of wheels to different types of vehicle bodies conveyed along a vehicle assembling line has a robot hand for fastening a plurality of nuts to hub bolts provisionally affixed to the wheel so as to assemble the wheel held by the robot hand to the vehicle body. The robot hand is provided with a center pin attachment to which different types of center pins, having been prepared correspondingly to center holes of the different types of wheels, are selectively and detachably attached. The center pin attached to the robot hand is fitted into the center hole of the wheel hub and locates the wheel in position with respect to the robot hand.
摘要:
The mirror drive for remote-controlled rear-view mirror assembly includes an air-tight container housing two motors to drive the horizontal and vertical turns of the mirror and which is composed of two synthetic resin-made casings which are closely attached to each other. Plural conductive plates which electrically connect terminals of the two motors to external terminals outside the airtight containers are previously buried in an insulative block with both ends there being exposed outside of the block. The insulative block covers the opening formed in the lateral wall of either of the casings and is secured to the lateral wall of the casing. Of the exposed ends of the plural conductive plates, those ones which are connected to the terminals of the motor are located inside the casings, while the other ends which are connected to the external connectors are led out through the opening in the casing.
摘要:
A loop-back control apparatus for use in an optical fiber transmission system, wherein it is possible to compensate for faults in opto-electrical and electro-optical converters contained in the optical fiber transmission system. An electrical switch, an optical switch, and duplicate access controllers are provided, the electrical and optical switches being controlled by a control signal generator to enable selection from among the various electro-optical and opto-electrical converters in the event of fault in one of those devices.
摘要:
A suede-like or deer skin-like raised woven or knitted fabric having at least one raised surface is produced by providing a woven or knitted fabric using a yarn consisting of synthetic hollow composite fibers each composed of two or more fiber-forming polyester constituents and two or more fiber-forming polyamide constituents and having a hollow space surrounded by the polyamide and polyester constituents which are arranged alternately with each other and adhered to each other side-by-side so as to form a tube-shaped body, and raising a surface of the fabric while allowing the hollow composite fibers located in at least the raised surface portion of the fabric to be divided into numerous very fine fibrils consisting of said polyester and polyamide constituents.
摘要:
A ceramic multi-layer wiring substrate includes a line-shaped insulation pattern arranged to extend over a plurality of surface wiring patterns and to intersect the respective surface wiring patterns, in which soldering land electrodes are defined by the insulation patterns.
摘要:
A multilayer printed wiring board is formed with a plurality of conductor layers laminated as a whole with insulating layers interposed, a non-penetrating via hole provided in the insulating layer as bottomed by the conductor layer exposed, a plated layer provided inside the via hole for electric connection between the conductor layers, the via hole being formed to be of a concave curved surface of a radius in a range of 20 to 100 &mgr;m in axially sectioned view at continuing zone of inner periphery to bottom surface of the via hole, whereby the equipotential surfaces occurring upon plating the plated layer are curved along the continuing zone to unify the density of current for rendering the plated layer uniform in the thickness without being thinned at the continuing zone.
摘要:
A connector 30 is integrated in a hermetic compressor 10. A flange block 48 is secured on the connector 30 by a screw 62. The connector 30 and the flange block 48 have through-holes 38 and 50, respectively, and a tube 54 is inserted into through-hole 50. A flange 58 is integrally formed in a peripheral surface of one end portion of the tube 54. Also, an elastic ring 60 is fitted near the flange 58. The flange 58 and the elastic ring 60 are positioned in enlarged diameter portions 40 and 42 formed in the connector 30 so that the ring 60 seals against the tube 54 and the connector 30. With this arrangement, simply by tightening the screw using a screwdriver, the tube can be securely connected with the container.