Abstract: In a data transmission system, a content server 6 sends out content data designated by a content reservation request from a DTE 1 onto a first or a second communications circuit 4 or 5 for storage into a DCE 3 connected to the DTE 1. The content reservation request also indicates a time limit by when the designated content data is to be ready in the DCE 3. The content server 6 manages thus designated time limit. The content server 6 also carries out scheduling processing. During the processing, based on both the time limit under management and predetermined communications information, determined is a transmission timing which ensures the content data completely transmitted by the time limit, and which communications circuit 4 or 5 is optimal. These are determined on the basis of both the managed time limit and predetermined communications information.

Abstract: An automatic regulating valve apparatus comprises a main valve unit, and a pilot valve unit operatively connected to the main valve unit to control the main valve unit. The main valve unit comprises a main valve casing, a main valve element disposed in the main valve casing, and a main valve driving member disposed in the main valve casing together with the main valve element and having a pressure receiving area greater than that of the main valve element, the main valve element is disposed on the upstream side of a valve seat so as to form a restricting passage between the main valve element and the main valve seat, and the main valve driving member is disposed for sliding movement in a space defined by a cylindrical wall formed in the main valve casing so as to define a main valve driving pressure chamber together with the cylindrical wall.

Abstract: A disc player has a first array of pickup devices arranged in a line for reading information from a disc and a second array of pickup devices arranged in a parallel line. The pickup devices are each independently movable along their respective lines with the devices of the first line offset from the devices of the second line so as to form a zigzag pattern.

Abstract: The invention provides a self-priming centrifugal pump capable of sucking up and pumping a highly viscous liquid containing muddy substances including a large amount of bubbles, and solid foreign matters, of preventing the flow of the liquid from the side of a main pump unit into a vacuum device and from the vacuum device into the main pump unit at all stages of operation including starting, operating and stopping stages and of perfectly automatic operation, and very economical in costs of equipment and maintenance.The self-priming centrifugal pump has a main pump unit for pumping a liquid, an auxiliary pump unit for centrifugal gas-liquid separation, and an exhaust vacuum device.

Abstract: An automatic-control valve device has a main valve unit, and a pilot valve unit for controlling the main valve unit. The pilot valve unit has a pilot valve A which closes when pressure in a downstream passage on the downstream side of the main valve unit increases beyond a predetermined value, a pilot valve B which opens when pressure in the downstream passage increases beyond the predetermined value. The pilot valve A and the pilot valve B are connected in series by passages through a main valve driving pressure chamber in a section between an upstream passage on the upstream side of the main valve unit and the downstream passage, and cooperate to maintain the pressure in the downstream passage at the predetermined valve.

Abstract: The present invention is intended to provide an economically advantageous, high-performance water hammer preventing check valve capable of preventing both water hammer and pressure rise under any pipeline conditions when feed of a fluid is stopped and of easily designed and manufactured. The invention provides a water hammer preventing check valve which opens when a fluid is fed forward and closes when the feed of the fluid is stopped to prevent the fluid from reversing.

Abstract: This invention relates to high-Cr precision casting materials containing carbon, silicon, manganese, chromium, nickel, vanadium, niobium, nitrogen, molybdenum, tungsten, cobalt and optionally boron in specific weight proportions, the balance being iron and incidental impurities, as well as turbine blades made by a precision casting process using these materials. Thus, the present invention provides high-Cr precision casting materials which are capable of precision casting and, moreover, have excellent high-temperature strength, as well as inexpensive and highly reliable turbine blades made by using these casting materials and such turbine blades also having lighter weight.

Abstract: A self-gush-cleaning filter device comprises a filter casing (1) provided with an inlet passage (a) and an outlet passage (d), a screen (11) disposed within the filter casing (1) so as to slide along the inner surface of the filter casing (1) in the flowing direction of a fluid, a foreign matter ejecting opening (15) being formed between the screen (11) and the inlet passage (a). A drive shaft (4) for driving the screen (11), a screen driving unit (3) for driving the drive shaft (4) so as to move the screen (11) quickly in a downstream direction in which the fluid flows from the inlet passage (a) toward the outlet passage (d) and to move the screen slowly in an upstream direction. An outlet shutoff valve (14) is disposed in the outlet passage (d) of the filter casing (1). The screen driving unit (3) is actuated after closing the outlet shutoff valve (14) to move the screen (11).

Abstract: In the valve, a valve element (4) is supported on a valve element operating shaft (7) by a fixed-length support means (5) and a variable-length support means (6) connected to its back surface opposite the front surface facing a valve seat (3). The fixed-length support means (5) has an arm (5a) of a fixed length pivotally connected to the valve element (4) and mounted for turning on the valve element operating shaft (7), and the variable-length support means (6) of a variable length comprises an elastic member (6a) acting to reduce the distance between the opposite ends of the variable-length support means (6), a transmission mechanism for converting the torque of the valve element operating shaft (7) into a force to increase the distance between the opposite ends of the variable-length support means (6), and a stopper (6f) for limiting the range of variation of the distance between the opposite ends of the variable-length support means (6).

Abstract: A disc player includes: a plurality of pickup devices for reading information from a disc and a plurality of guide devices arranged radiately from a center of the disc, each for radially transferring one of the pickup devices. The guide devices are arranged so that each alternate pickup device is raised or lowered toward the inner circumferential portion of the disc.

Abstract: A disc player includes at least one pickup device, which includes a pair of objective lenses for reading information from a disc. The pair of objective lenses are independently movable in the radial direction of the disc by a magnetic field generated by a common magnet.

Abstract: Disclosed is an automated supplying system for supplying liquid samples and test strips to an analyzer having a receiving section which receives test strips dipped in liquid samples one by one, a section at which optical characteristics of test pads provided on the received test strips are measured and a section for calculating analytical results of the respective components based on the respective optical characteristics obtained by the measurement.

Abstract: An electrodeposition coating method characterized in that in electrodeposition coating of a water soluble composition of a polyimide precursor which is prepared by using 1,2,3,4-butanetetracarboxylic acid or its imide-forming derivative and a diamine and has a percentage of residual acid value of 30 to 3%, there is added previously a water soluble solvent selected from the group consisting of an alcoholic solvent, N-methyl-2-pyrrolidone, dimethylformamide and dimethylacetamide to the above-mentioned composition, and an electrodeposition coating agent used therefor. There can be provided the electrodeposition coating method practicable for the use of a water soluble polyimide composition which is capable of forming a uniform baked coating film having a continuous surface and being excellent in adhesivity to substrate and in toughness.

Abstract: The present invention relates to a noncontaminative centrifugal pump for pumping a high-purity liquid, such as a high-purity chemical or ultrapure water used in a VLSI circuit manufacturing system, without producing any trace of dust and without allowing foreign matters entering its casing. A noncontact shaft seal assembly provides an accurate gap between the rotating and fixed rings thereof to allow a required leakage from the noncontaminative centrifugal pump, does not produce dust by abrasion, inhibits foreign matters from entering the noncontaminative centrifugal pump and maintains the high-purity liquid in a high-purity condition. While the noncontaminative centrifugal pump is in operation, the impeller produces a hydraulic axial thrust to bias the main shaft in one direction by a distance equal to a play thereof so that the gap is maintained in a set size suitable for preventing generation of dust by abrasion and inhibiting foreign matters from entering the casing.

Abstract: The present invention is intended to provide a self-priming centrifugal pump with an excellent self-priming and pumping performance without destroying the nearly complete morphology of the volute type centrifugal pump. The principle of self-priming action that circulates self-priming water by the characteristics of a larger volute and a smaller volute formed around the periphery of an impeller to drive out an air-water mixture produced by vortices generated by the impeller is elucidated in the description of "Double Volute Centrifugal Pump" proposed in JP-B No. 28-3039. Efforts have been concentrated on locally supporting the bottom of a tornado-like cavity formed by a whirling current of self-priming water for centrifugally separating air from self-priming water and secondary technical problems accompanying such efforts could not have been solved.

Abstract: The invention has its object to radically resolve an untapped technical issue in a non-water hammering check valve device, in which a valve disc, a valve seat and a surrounding flow passage are configured such that the valve disc is substantially seated on the valve seat at the time when input to a pump is shut off and a discharge flow in the flow passage loses inertia to stop, and to provide a reasonable non-water hammering check valve device of a simple and clear construction which suffers a small resistance loss of a valve at the time of a predetermined maximum flow rate, can readily accommodate an abrupt change in a flow state without delay in valve closing operation and provides a uniform and close seating on the valve seat at the time of valve seating to prevent water hammering.

Abstract: A check valve for preventing water hammer in which a valve element is adapted for quick initiation of a valve closing motion without delay in response to an abrupt change in fluid flow resulting from stoppage of a pump, and which is seated on a valve seat when the inertial flow of the fluid in the discharge direction stops, without generating a water hammer and impulse noise. The valve element and the valve seat are constructed so that the valve element follows the motion of the flowing fluid and is interlocked with a braking device by a linear motion transmitting mechanism.

Abstract: The present invention relates to an automatic constant-pressure lift valve provided with a pilot valve unit having an A valve unit and a B valve unit, and an external control force applying means that can be simply adjusted to set a predetermined valve-outlet pressure.A main valve unit is constructed so that an abnormal rise in the valve-outlet pressure can be avoided at start and stop and continuous operation of a pumping or conveying pump facility. The automatic constant-pressure lift valve has a construction capable of easily maintaining watertightness when the line is shut off.The pilot valve unit is not provided with any fixed flow restriction regulating passage, such as a needle valve. When the main valve unit, and the A valve unit and the B valve unit of the pilot valve unit are clogged, those valves open automatically for automatic cleaning.This constant-pressure lift valve has an excellent industrial effect.

Abstract: The present invention provides a high-performance, economical valve. In the valve, a valve element (4) is supported by a valve element support shaft (6) on an arm member (5) with a degree of freedom of turning, and the arm member (5) is supported by a valve element operating shaft (7) supported on a valve casing (1) at a position thereon spaced a distance apart from a position thereon at which the valve element support shaft (6) supports the valve element (4) on the arm member (5). One end par (4a) of the valve element (4) is biased constantly toward one end part (5a) of the arm member (5). When the valve is opened in a fully open state by applying external torque to the valve element operating shaft (7), the valve element (4) extends along the streamline of fluid flow to reduce head loss due to resistance exerted by the valve element (4) on fluid flow. The valve element (4) is brought into uniform, close contact with a sealing surface (3m) of a valve seat (3) to stop fluid flow.

Abstract: Optical fibers are fixed to elongating tables by optical fiber fixing jigs. Coatings are removed from portions of the fibers and respective fibers of two different groups are placed into tight contact with one another. The fibers are then heated by a gas burner 4A so as to be welded integrally with each other, and are then elongated. In one preferred embodiment, the fibers are arranged such that there are gaps therebetween. These gaps are substantially 250 .mu.m. The gaps are sufficiently wide that heating gas flows in a manner such that all the optical fiber strands are heated uniformly to make it possible uniform welding and elongation.