Abstract: A focus servo lead-in method is implemented where the focus servo loop is first in an open state. An objective lens located at a position separated by a predetermined distance from the recording surface of a disk is first moved toward the recording surface at a high velocity. At a predetermined time, the moving velocity is decreased to a lower velocity and the focus servo loop is brought to a closed state based on the level of the focus error signal obtained while the objective lens is moving at the lower velocity.

Abstract: A bearing apparatus comprises: a plurality of bearing units, each of the bearing units holding balls so as to have the balls freely rotate and the balls being arranged so as to have a predetermined distance in a relatively positional relation; and a plate for linking the plurality of bearing units on a plane to have the bearing units kept constant in a distance in a relatively positional relation. The bearing units are placed in holes drilled in the linking plate, and are connected to the linking plate slightly loose by a joint mechanism so as for the connection to be flexible during movement of the apparatus. The apparatus can be of 4 to 20 mm in height.

Abstract: A seismic isolator comprises: a friction device having upper friction plate and a lower friction plate, a friction plane of the upper friction plate and the lower friction plate having a characteristic of Coulomb friction; and horizontally placed springs which reduce a relative displacement and a residual displacement. The upper friction plate includes being any one selected from the group consisting of a polyacetal resin containing lubricating oil, a bronze or brass alloy with solid lubricant buried therein, a sintered alloy with solid lubricant dispersed therein, a porous structure of cast iron with lubricant oil contained therein and a steel backing sintered layer with solid lubricant and oil impregnated therein. Furthermore, the lower friction plate includes being any one surface-treated material selected from the group consisting of a hard chromium-plated plate and a hard nickel-plated plate.

Abstract: A method and apparatus for controlling a visual data playback apparatus such as a video disc player whereby control is executed in response to input commands which are generated by scanning a printed code, e.g. bar code, on a document to produce code signals which are supplied to the control apparatus of the invention. Portions of the code are positioned close to respective sections of a printed document, so that a user can cause moving or still images relating to a document section to be produced on a monitor display, without the need for the user's eyes to move away from the document being read, e.g. to operate a separate control unit.

Abstract: A protein and a derivative thereof having a methionine residue added at the amino terminus are mutually separated with the utilization of the difference in affinity for hydroxyapatite between them, such as by means of liquid chromatography using a hydroxyapatite column.

Abstract: The outer periphery of a screw and the inside of a barrel of a screw type extruding or kneading machine are made of ceramics, to improve the abrasion and heat resistances thereof, so that the screw and the barrel will operate for a longer life time even if a hard material or a material containing a hard material is worked.

Abstract: The present invention relates to a plug-containing type internally threaded anchor to be set in concrete which is used to optionally and firmly fix hardware, such as ceiling members, floor members and wall members, to the surface of a concrete structure and it also relates to a method of producing the same which promises mass-production effect. The invention is characterized in that as a means for preventing the plug contained in the anchor body from accidentally slipping off owing to vibration, shock or other external forces exerted during transport or laying operation, the anchor body is formed with an internal thread by rolling whose internal diameter is smaller than the outer diameter of the plug, so that the crest portion of the internal thread bulging by a predetermined amount above the anchor body holds the plug in slip-off preventing condition.

Abstract: A timepiece operated by solar cells wherein the timepiece includes a base plate defining thereabove a base with a time indicator. Mounted on the base plate is a driver for driving the time indicator. A plurality of circumferentially spaced solar cells are also mounted on the base plate for energizing the driver to drive the time indicator. The solar cells employed are respectively flat-shaped ones, each having a light sensitive surface on its one of two major surfaces, and are spaced circumferentially in a loop within a plane parallel with the base plate. A light guide is mounted on the base plate for transmitting incident light to the light sensitive surface of each solar cell through a deviated or deflected path for the purpose of giving greater design flexibility in the arrangement of the solar cells within a limited space of the timepiece, while retaining maximum light collecting efficiency.

Abstract: A time switch driven by an electric clock motor is disclosed. The time switch has a base plate above which a time dial with on and off-trippers are rotatably mounted. Disposed below the base plate are other components including input and output terminals, switch means electrically connected between the terminals, switch activating means for closing and opening the switch means in accordance with the positions of the on- and off-trippers on the rotating time dial, and gear train leading from a rotor of the motor to the time dial. The motor comprises the rotor which is a bipolarized permanent magnet and an electromagnet in the form of a ring interrupted by a gap in which the rotor is located. In the base plate there is formed a generally annular groove for receiving the electromagnet, such that the electromagnet, a constituent of the motor, is received within the thickness of the base plate to reduce the depth required for the motor disposed below the plate.

Abstract: A highly electroconductive paste for metallizing comprising (a) a high-melting metal powder such as W, Mo, Mo-Mn, Pt, etc., powder, (b) an additive such as MgO, CaO, SiO.sub.2, Al.sub.2 O.sub.3, etc., in an amount of 0.1 to 3 parts by weight per 100 parts by weight of the metal powder, (c) a binding agent, and (d) a solvent can give a highly electroconductive metallized ceramic having strongly bonded metallized layer by coating said paste on an alumina ceramic substrate and firing it.

Abstract: A damper element comprises a lead sheet and vibration-proof sheet spirally and alternately wound to provide a spiral, circular configuration with these sheets bonded to each other. This arrangement permits a shearing energy acting upon one and the other surface of the circular configuration to be absorbed by the deformation of the lead sheet and vibration-proof sheet.

Abstract: A screen type hollow filament microfilter made of a polyvinylidene fluoride type resin and having a layer structure of two kinds of layers with the support layer and the internal and external skin layers having an easily-controllable and wide average effective pore diameter of 0.05 to 1.0 .mu.m, characterized by having a high selectivity in permeation, a high permeability, a high porosity, an excellent mechanical strength and an excellent chemical resistance and an excellent inertness to living bodies. The microfilter, which has a number of excellent performances, can be produced by extruding a spinning solution comprising a polyvinylidene fluoride type resin, a solvent therefor and at least one kind of surfactant from an annular hollow filament spinning orifice and coagulating the extrudate by using coagulating liquids.

Abstract: A specific porous membrane is found to be extremely useful for permeation-separation of an oil from an oil-containing emulsion. By contacting a stable oil-containing emulsion of either water-in-oil type or oil-in-water type with the surface of a specific porous membrane having at its surface a critical surface tension of less than 35 dynes/cm to not less than 20 dynes/cm and having an average pore diameter of 0.03 .mu.m to 5 .mu.m, a pore radius distribution of not more than 1.5 and a porosity of 1 to 85%, only the oil can be permeation-separated, without permeation of the liquid immiscible with the oil, with high selectivity and high oil permeation.