Abstract: An oil-free scroll compressor used for compression of air or the like, comprises an orbiting scroll having a spiral-shaped lap or laps formed on one or both sides of an end plate, and a stationary scroll having a lap or laps adapted to mate with the orbiting scroll to define a compression chamber or chambers.Grooves are formed on tips of the respective scroll laps, and elastic tip seals are fitted into the grooves in order to prevent leakage of compressed gas from between the laps and the end plates. Those surfaces of the orbiting scroll and of the stationary scroll or scrolls, which define the compression chamber or chambers, are subjected to surface treatment in order to prevent seizure or the like caused by sliding of the tip seals and the laps. The stationary scroll or scrolls are subjected to an anodizing coating treatment while the orbiting scroll is subjected to Ni--P--B treatment.

Abstract: An oil groove is provided in a space surrounded with the outer peripheral portion of an end plate of a revolving scroll, a stationary scroll and a frame on the inner surface of the frame, and lubricating oil attached to the inner surface of the frame by splashed with rotation of the balancing weight is reserved in the oil groove and then supplied to a key groove for sliding an Oldham-ring.

Abstract: An oil groove is provided in a space surrounded with the outer peripheral portion of an end plate of a revolving scroll, a stationary scroll and a frame on the inner surface of the frame, and lubricating oil attached to the inner surface of the frame by splashed with rotation of the balancing weight is reserved in the oil groove and then supplied to a key groove for sliding an Oldham-ring.

Abstract: The present invention provides a magnetic recording medium wherein the surface layer of the protective film of the medium is irradiated by ions to give a protective film having high reliability in resistance to sliding with the magnetic head, a process for producing the medium, an apparatus for producing the medium, and a magnetic recording apparatus having the medium mounted therein. The essentials of the present invention lie in introducing a minute surface roughness of atomic order in the surface of the protective film 5 constituting the outermost layer of a magnetic recording medium by irradiating atoms accelerated by high voltage (that is, by implanting ions) to the surface.

Abstract: A lubricant supply source is disposed in the vicinity of a sliding or rotary portion of a machine element, and an electrical power source is intermittently driven by a controller, so as to intermittently supply lubricant from the lubricant supply source to the machine element. When required, a sensor for monitoring the operating state of the machine element, and/or a remote controller is used, so that the supply of lubricant is controlled on the basis of the signal of the sensor and/or by means of the remote controller. Consequently, lubricant can be supplied or supplemented to the machine element in accordance with necessity. Therefore, the machine element will be able to stably operate for a long time, even in relative inaccessible places which people cannot inadvertently access.

Abstract: A magnetic liquid seal retains a magnetic liquid by means of the magnetic force applied thereto from a magnet. The magnet is constituted by a magnetized deformable member.

Abstract: A rotary substrate holder of a molecular beam epitaxy apparatus including leads-cum-posts serving both as leads for passing a current to a heater for heating a substrate and as posts for supporting the heater. By this arrangement, heat transferred from the heater to a bearing disposed in the vicinity of the heater is minimized in amount, thereby prolonging the service life of the holder and minimizing a heat loss thereof.

Abstract: A turbocharger having a rotor shaft supported by bearing portions of a bearing housing through floating bushes. Holders for the floating bushes are replaceably secured to the inner peripheral surfaces of the bearing portions opposing to the outer peripheral surfaces of the floating bushes. When the holders are worn down, the holders solely can be replaced with new ones, so that it is not necessary to renew the bearing housing as a whole.

Abstract: An apparatus for molecular beam epitaxy according to the present invention is so constructed that a substrate is introduced into a vacuum vessel with a substrate surface for epitaxial growth facing in the direction of gravity, and that the substrate is conveyed to and transferred into vacuum chambers for performing processes necessary for the epitaxial growth, with the substrate surface maintained in the direction of gravity and without directly touching the substrate surface.