Abstract: According to an embodiment of the present invention, there is provided a heat transport device including a working fluid, an evaporation portion, a condenser portion, a flow path portion, and an area. The working fluid includes pure water and an organic compound bearing a hydroxyl group. The evaporation portion causes the working fluid to evaporate from a liquid phase to a vapor phase. The condenser portion communicates with the evaporation portion, and causes the working fluid to condense from the vapor phase to the liquid phase. The flow path portion causes the working fluid condensed in the condenser portion to the liquid phase to flow to the evaporation portion. The area is made of a carbon material and provided on at least one of the evaporation portion, the condenser portion, and the flow path portion.

Abstract: A heat transport device includes an airtight container, a working fluid contained in the airtight container, and a plurality of plate-like members including a first plate-like member and a second plate-like member adjacent to the first plate-like member, the plate-like members each having a first hole having a first opening area and a second hole having a second opening area smaller than the first opening area, the plate-like members being layered in the airtight container so that the first hole of the first plate-like member and the first hole of the second plate-like member are communicated with each other, to retain the working fluid in a liquid phase by applying a capillary force to the working fluid, and so that an opening of the second hole is located within an opening of the first hole, to transfer the working fluid vaporized into a gas phase in the layered direction.

Abstract: To prevent magnetic heads from being pasted on a floppy disk even when the floppy disk is left for a long time period while being chucked to a disk table, when the magnetic heads are moved to an outermost peripheral position or an innermost peripheral position of the floppy disk by a head moving mechanism, the upper side head is lifted upward from the floppy disk by a lifter.

Abstract: A magnetic disc apparatus capable of selectively driving at least two types of the magnetic discs having signal recording portions on their major surfaces and having different recording densities. The magnetic disc apparatus includes a main head carriage mounted for movement on a base block, a supporting arm having its one end supported by a main head carriage, and a magnetic head having a first transducer having a slider, and a first core and adapted for accessing information signals at a first recording density, and a second transducer having a second core and adapted for accessing information signals at a second recording density higher than the first recording density. A magnetic gap for the first transducer and a magnetic gap for the second transducer are formed on the surface of the magnetic head facing the major surface of the magnetic disc.

Abstract: An engagement mechanism for a magnetic head used with a floppy disk has a wedged-shaped portion that is stamped in a bracket portion of a sheet metal head carriage that engages a drive thread of a feed screw driven by a stepper motor. Engagement is maintained between the wedge-shaped portion and the drive thread of the feed screw by an arm of a torsion spring that is also mounted on the carriage and that engages the feed screw at a location opposite the location of the wedge-shaped element.

Abstract: To reduce the number of parts of a floppy disk drive as well as the steps required for assembling the floppy disk drive, a shielding ring for protecting a magnetic head from the influence of an external magnetic field, and an engaged portion to be engaged with a feed screw so as to drive the magnetic head, are formed integrally with a carriage for carrying the magnetic head, for example, by press working sheet metal.

Abstract: To reduce the number of parts of a floppy disk drive as well as the steps required for assembling the floppy disk drive, a shielding ring for protecting a magnetic head from the influence of an external magnetic field, and an engaged portion to be engaged with a feed screw so as to drive the magnetic head, are formed integrally with a carriage for carrying the magnetic head, for example, by press working sheet metal.