Abstract: A rotary head device with a fluid bearing including an upper cylinder and lower cylinder, a sleeve provided on the lower cylinder, a rotary shaft rotatably inserted in the sleeve, and pairs of cylindrical rotary transformers are mounted on the upper and lower cylinders, with two spaced apart herringbone patterns of grooves (26A and 26B) formed either on the rotary shaft or on the inside surface of the sleeve, the length of the herringbone pattern of grooves being larger on the upper cylinder end of the shaft or sleeve, and smaller on a motor end of the shaft or sleeve.

Abstract: A fluid bearing device including a shaft, a sleeve rotatably supported by the shaft, a thrust bearing plate supported by the sleeve, a radial groove formed on one of an outer periphery of the shaft and an inner periphery of the sleeve, and a spiral groove formed on one of one end face of the shaft and one face of the thrust bearing plate such that the radial groove retains oil, while the spiral groove retains grease containing thickener and base oil identical, in compositions and viscosity, with the oil of the radial groove.

Abstract: A dynamic pressure type fluid bearing device including a housing having a bearing hole, a shaft rotatably provided in this bearing hole, and a thrust bearing member attached to an end of the housing, wherein a groove is provided in either the shaft or the bearing hole, another groove is provided in the contacting surface between the thrust bearing member and the shaft, a ventilation flute to communicate with the atmosphere is provided in the contacting surface between the thrust bearing member and the housing, and a lubricant is charged around the groove, so that the lubricant is prevented from flowing out due to changes in the atmospheric pressure or environment.

Abstract: A capsule connector has a receptacle with a space for removably receiving a capsule therein; that is, a semiconductor device adapted to be externally connected to an electronic device. Multi-contact connectors are disposed at the bottom of the space of the receptacle so as to establish an electrical connection between the capsule and the electronic device; that is, electrical connections between terminal contacts of the capsule and terminal contacts disposed on a base member upon which is mounted the receptacle. A projection is extended from one side of the receptacle so as to engage with one side of the capsule and a sliding pawl is disposed at the opposite side of the receptacle so as to releasably engage with the opposite side of the capsule.

Abstract: A method of making a keyboard including, a number of switch keys fixedly provided on one surface of a resilient plastic sheet a number of moving contacts formed on the other surface of the resilient plastic sheet. The keys are formed of a plastic material having a melting temperature lower than that of the resilient plastic sheet.Thermoplastic bond layers are deposited on both surfaces of the resilient plastic sheet. The melting point of the thermoplastic bond layers is lower than that of the switch keys.The resilient plastic sheet is placed in a metal mold which has cavities (101a) at predetermined places.Melted plastic material is injected into the cavities to form the switch keys and at the same time cause the portions of thermoplastic bond layers which contact the injected melted plastic to be melted by the heat of the injected melted plastic material and to bond the switch keys onto the resilient plastic sheet.