Abstract: According to one embodiment, a cladding portion is integrally formed on a sliding-contact surface of a valve rod or a valve body, which serves as a movable member, wherein the cladding portion is formed by inducing a pulsed discharge between an electrode which is formed of a molded body consisting mainly of a metal and a treatment target portion of the valve rod or the valve body, so as to weld and deposit a material of the electrode on a surface of the treatment target portion. A surface layer is integrally formed on a sliding-contact surface of a bushing or a sleeve, which serves as a stationary member, wherein the surface layer is formed by forming a first coating film by surface-hardening heat treatment using a metallic cementation.

Abstract: According to one embodiment, there is provided a steam valve apparatus including a main throttle valve, a steam control valve arranged on a downstream side of the main throttle valve, and an intermediate flow-channel part which connects the main throttle valve and the steam control valve. The intermediate flow-channel part is a circular pipe flow channel forming a circular arcuate shape so as to change a flow of steam, which has flowed out of the main throttle valve, from a perpendicular direction into a direction of flowing out into the inlet part. An outlet part is open upward, and a valve rod penetrates a lower part of a casing downward.

Abstract: A manufacturing method of laser diode unit of the present invention includes steps: placing a laser diode on top of a solder member formed on a mounting surface of a submount, applying a pressing load to the laser diode and pressing the laser diode against the solder member, next, melting the solder member by heating the solder member at a temperature higher than a melting point of the solder member while the pressing load is being applied, and thereafter, bonding the laser diode to the submount by cooling and solidifying the solder member, thereafter, removing the pressing load, and softening the solidified solder member by heating the solder member at a temperature lower than the melting point of the solder member after the pressing load has been removed, and thereafter cooling and re-solidifying the solder member.

Abstract: A workpiece transfer apparatus comprises a nozzle unit and an imaging unit wherein the nozzle unit includes a cylindrical body, a suction hole opening at one end of the tuber body and an end face member of a transparent body sealing the other end of the tuber body. The suction hole can make the imaging unit capable of taking images of first patterns for positioning on an upper surface (suctioned surface) of a workpiece, and the size and shape of the suction hole fits within an outline of the upper surface of the workpiece. The end face member of the transparent body both enable to maintain negative pressure of inside of the cylindrical body and to permit optical penetration for the imaging unit. The imaging unit takes the image of the first pattern for positioning of the workpiece while the imaging unit views a suctioned surface of the workpiece through the transparent body and the suction hole.

Abstract: According to one embodiment, a valve apparatus includes a movable member operating in conjunction with opening and closing of a valve, and a stationary member in sliding or abutting contact with the movable member. The valve apparatus includes a cladding portion that is integrally formed on a sliding-contact surface or an abutting contact surface of at least one of the movable member or the stationary member. The cladding portion is formed by inducing a pulsed discharge between an electrode, which is formed of a molded body consisting mainly of a metal, and a treatment target portion of the movable member or the stationary member, so as to weld and deposit a material of the electrode on a surface of the treatment target portion.

Abstract: A workpiece transfer apparatus includes a nozzle unit and an imaging unit. The nozzle unit includes a tubular body, a suction hole opening at one end of the tubular body and an end face member of a transparent body sealing the other end of the tubular body. The imaging unit captures images of first patterns for positioning that are located on an upper surface of a workpiece. The size and shape of the suction hole fits within an outline of the upper surface of the workpiece. The end face member of the transparent body maintains a negative pressure inside the cylindrical body and permits optical penetration for the imaging unit. The imaging unit captures the image of the first pattern for positioning of the workpiece while the imaging unit views a suctioned surface of the workpiece through the transparent body and the suction hole.

Abstract: A steam turbine plant capable of stably controlling start up of a steam turbine provided with a turbine bypass system and a driving method thereof are provided. A steam turbine plant 10 of an embodiment includes: a superheater 21; a reheater 22; a high-pressure turbine 30; an intermediate-pressure turbine 40; a low-pressure turbine 50; a condenser 110; a bypass pipe 74 that branches off a main steam pipe 70 and is provided with a high-pressure turbine bypass valve 95; a bypass pipe 75 that branches off a high-temperature reheat steam pipe 72, is connected to the condenser 110, and is provided with a low-pressure turbine bypass valve 97; and a branch pipe 76 that branches off a low-temperature reheat steam pipe 71, is connected to the condenser 110, and is provided with a ventilator valve 99.

Abstract: In one embodiment, a steam valve apparatus includes: a hydraulic cylinder including an internal space sectioned into first and second chambers by a piston operated by a hydraulic liquid; a first passage to supply the hydraulic liquid to the first chamber; a second passage connecting the first and second chambers; a third passage to drain the hydraulic liquid from the second chamber; an electromagnetic valve switched between first and second states; a first cartridge valve opening the first passage when the electromagnetic valve is in the first state and closing the first passage when the electromagnetic valve is in the second state; and a second cartridge valve closing the first passage when the electromagnetic valve is in the first state and opening the first passage when the electromagnetic valve is in the second state.

Abstract: A manufacturing method of laser diode unit of the present invention includes steps: placing a laser diode on top of a solder member formed on a mounting surface of a submount, applying a pressing load to the laser diode and pressing the laser diode against the solder member, next, melting the solder member by heating the solder member at a temperature higher than a melting point of the solder member while the pressing load is being applied, and thereafter, bonding the laser diode to the submount by cooling and solidifying the solder member, thereafter, removing the pressing load, and softening the solidified solder member by heating the solder member at a temperature lower than the melting point of the solder member after the pressing load has been removed, and thereafter cooling and re-solidifying the solder member.

Abstract: A thermally-assisted magnetic recording head is provided, in which the light-source output can be adjusted according to its variation by environmental influences and over time. The head comprises: a light source; a write head element provided in a element-integration surface; an optical system provided in the element-integration surface and configured to guide a light emitted from the light source to the vicinity of one end of the write head element; and a light detector for monitoring the light-source output, provided in the element-integration surface and comprising a light-receiving surface covering an area directly above at least a portion of the optical system. This light detector with such a light-receiving surface can detect a leakage light emitted from the optical system as a monitoring light. Therefore, feedback adjustment of the light-source output can be realized to stabilize the intensity of light for thermal-assist applied to a magnetic recording medium.

Abstract: A method for manufacturing a thermally-assisted magnetic recording head is provided, in which joined are: a light source unit that includes a light source having a surface including a light-emission center on the joining surface side of a unit substrate; and a slider that includes an optical system having a light-receiving end surface reaching a back surface opposite to the opposed-to-medium surface. This method utilizes “semi-active alignment” that uses an alignment light, and comprises steps of: causing a light to enter the light source from a surface opposite to the light-emission center; detecting the light that has passed through the light source and is emitted from the light-emission center to align the light-emission center with the light-receiving end surface of the slider; and bonding the light source unit to the slider. This manufacturing method can achieve the alignment with a sufficiently high alignment accuracy in a short processing time.

Abstract: A workpiece transfer apparatus includes a nozzle unit and an imaging unit. The nozzle unit includes a tubular body, a suction hole opening at one end of the tubular body and an end face member of a transparent body sealing the other end of the tubular body. The imaging unit captures images of first patterns for positioning that are located on an upper surface of a workpiece. The size and shape of the suction hole fits within an outline of the upper surface of the workpiece. The end face member of the transparent body maintains a negative pressure inside the cylindrical body and permits optical penetration for the imaging unit. The imaging unit captures the image of the first pattern for positioning of the workpiece while the imaging unit views a suctioned surface of the workpiece through the transparent body and the suction hole.

Abstract: In the embodiment, a steam valve device has, a steam regulating valve, and an intermediate flow path connecting the main steam stop valve and the steam regulating valve. The main steam stop valve and the steam regulating valve respectively have: casings where flow paths are formed between horizontal inlet ports and outlet ports opened downward and valve seats are arranged in the flow paths; valve elements movable up and down in the casings; and valve rods for driving the valve elements. The valve rods extend upward, and they are pulled off upward in a direction to outside of the casings when opening the flow paths. The intermediate flow path changes the flow direction of main steam flowing out of the outlet port of the main steam stop valve from downward direction to horizontal direction to guide the main steam toward the outlet ports of the steam regulating valves.

Abstract: Provided is a light source unit the weight of which can be reduced while ensuring power supply to the light source. The light source is configured to form a thermally-assisted magnetic recording head by being joined with a slider including an optical system that propagates light for thermal assist. The light source unit comprises: a unit substrate including a joining surface that faces an power-supply electrode of the slider; a first electrode provided on the joining surface; a second electrode provided on a source-installation surface and electrically connected to the first electrode; and a light source that includes two electrode layers and a light-emission center located in a light-emitting surface. The first and second electrodes eliminate the provision of a terminal electrode for light source on the source-integration surface. As a result, the weight of the light source unit can be reduced.

Abstract: A method for manufacturing a thermally-assisted magnetic recording head is provided, in which a light source unit including a light source and a slider including an optical system are bonded. A unit substrate is made of a material transmitting light having a predetermined wavelength, and an adhesion material layer is formed on the light source unit and/or the slider. The manufacturing method includes: aligning the light source unit and the slider in such a way that a light from the light source can enter the optical system and the adhesion material layer is sandwiched therebetween; irradiating the adhesion material layer with a light including the predetermined wavelength through the unit substrate; and bonding them. The adhesion material layer melted by the light including the predetermined wavelength and transmitted through the unit substrate can ensure high alignment accuracy as well as higher bonding strength and less change with time.

Abstract: A method for manufacturing a thermally-assisted magnetic recording head is provided, in which a light source unit including a light source and a slider including an optical system are bonded. A unit substrate is made of a material transmitting light having a predetermined wavelength, and a unit adhesion material layer that contains Sn, Sn alloy, Pb alloy or Bi alloy is formed on the light source unit and/or the slider. The manufacturing method includes: aligning the light source unit and the slider in such a way that a light from the light source can enter the optical system and the unit adhesion material layer is sandwiched therebetween; and causing a light including the predetermined wavelength to enter the unit substrate to melt the unit adhesion material layer. The unit adhesion material layer melted by the light including the predetermined wavelength can ensure high alignment accuracy as well as higher bonding strength and less change with time.

Abstract: In one embodiment, a steam valve apparatus includes: a hydraulic cylinder including an internal space sectioned into first and second chambers by a piston operated by a hydraulic liquid; a first passage to supply the hydraulic liquid to the first chamber; a second passage connecting the first and second chambers; a third passage to drain the hydraulic liquid from the second chamber; an electromagnetic valve switched between first and second states; a first cartridge valve opening the first passage when the electromagnetic valve is in the first state and closing the first passage when the electromagnetic valve is in the second state; and a second cartridge valve closing the first passage when the electromagnetic valve is in the first state and opening the first passage when the electromagnetic valve is in the second state.

Abstract: Provided is a light source unit that is to be joined to a slider to form a thermally-assisted magnetic recording head. The light source unit comprises: a unit substrate having a source-installation surface; a light source provided in the source-installation surface and emitting thermal-assist light; and a photodetector bonded to a rear joining surface of the unit substrate in such a manner that a rear light-emission center of the light source is covered with a light-receiving surface of the photodetector. The photodetector can be sufficiently close to the light source; thus, constant feedback adjustment with high efficiency for the light output of the light source can be performed. This adjustment enables light output from the light source to be controlled in response to changes in light output due to surroundings and to changes with time to stabilize the intensity of light with which a magnetic recording medium is irradiated.

Abstract: A steam valve assembly has a main-steam stop valve, and a steam control valve connected downstream to the main-steam stop valve via an intermediate flow path. The two valves each has a casing having an inlet port directing horizontally, and an outlet port directing vertically. The valve bodies and the valve stems move up and down in the casings to open and close the flow paths in the valves. The intermediate flow path is configured to guide main steam from the outlet port of the main-steam stop valve in vertically downward direction to the inlet port of the steam control valve in horizontal direction.

Abstract: Provided is a light source unit that is to be joined to a slider to form a thermally-assisted magnetic recording head. The light source unit comprises: a unit substrate having a source-installation surface; a light source provided in the source-installation surface and emitting thermal-assist light; and a photodetector bonded to a rear joining surface of the unit substrate in such a manner that a rear light-emission center of the light source is covered with a light-receiving surface of the photodetector. The photodetector can be sufficiently close to the light source; thus, constant feedback adjustment with high efficiency for the light output of the light source can be performed. This adjustment enables light output from the light source to be controlled in response to changes in light output due to surroundings and to changes with time to stabilize the intensity of light with which a magnetic recording medium is irradiated.