Abstract: A communications apparatus includes a required plug-in judgement unit for judging a plug-in module required for specific contents, and a plug-in deletion unit, when a specific amount of a memory storage, whose capacity is the specific amount and which has stored a specific plug-in module, is insufficient to further store the plug-in module judged by the required plug-in judgement unit, the plug-in deletion unit for deleting the specific plug-in module having been stored in the memory storage.

Abstract: A high frequency relay comprises a contact base block having pairs of fixed contacts, contact members with movable contacts, and an electromagnet for moving the contact members to open and close the fixed contacts by the movable contacts. The contact base block comprises an injection-molded base having projections on its front surface, first metal films formed as the fixed contacts on top surfaces of the projections, second metal films formed as connection terminals for outside devices on a rear surface of the base, each of which corresponds to one of the first metal films, through holes each having a conductive material on its inner surface to make an electrical connection between one of the first metal films and the corresponding second metal film in the shortest distance, and a third metal film formed on the base to provide electrical isolation from the first and second metal films, which works as electromagnetic shield as well as a ground.

Abstract: An information terminal includes a history management section for recording history information about communication; an information management table for recording history related information indicating a processing state of the history information; and an information history list display section for displaying the history information in connection with the processing state of the history information in accordance with the history related information.

Abstract: An optical micro-machining method of glass characterized in that after light is applied to glass including SiO.sub.2 and 30-70 mol % GeO.sub.2, the irradiated area is removed by etching.

Abstract: A glass material variable in volume by irradiation with ultraviolet light has a GeO.sub.2 --SiO.sub.2 glass composition having a GeO.sub.2 content of 0.5 to 90 mol %, and is in the form of a thin film formed in an argon atmosphere or in an argon-oxygen mixed gas atmosphere by the high-frequency sputtering method.

Abstract: A method for producing a SiO.sub.2 glass material having regions changed in light refractive index is provided which comprises implanting at least 5.times.10.sup.19 Ge ions/cm.sup.3 into a SiO.sub.2 glass substrate, heat-treating the substrate at a temperature exceeding 300.degree. C., and exposing the substrate to an ultraviolet light. Also provided is a SiO.sub.2 glass material produced by the method.

Abstract: This invention provides a method of producing a diffraction grating of a spectroscope by applying light to a thin film of glass having characteristics such that a density change occurs with the change of a glass structure upon irradiation of light and volume expansion occurs irreversibly. The method comprises applying light to a diffraction grating formation of a surface of the thin film by applying light through a phase mask or applying interference light, and causing the light irradiation portion of glass to expand and to thereby form the diffraction grating. Light to be applied is generally laser beams of ultraviolet rays, such as an excimer laser, a Nd-YAG laser or UV higher harmonics of a dye laser. A laser beam of a visible light region can be used, too. Preferably, a silica single crystal plate is used for the substrate of the thin film, and sputter vacuum deposition is used for forming the thin film. The glass composition whose volume expands upon irradiation of light is GeO.sub.2 --SiO.sub.

Abstract: A printer includes improved paper feeding mechanism. A manual paper guide plate below an automatic paper feeding device can guide a thick piece of paper into a printing position on the platen without bending it hard around the platen. A pin tractor below the manual paper guide plate can feed a continuous web substantially straight into the printing position. A print head below the platen prints out on the lower surface of printing paper, whereby the printed individual cut sheets of paper being piled up one after another with the printed surface facing downward in a proper page order. A paper tray for holding the printed paper can alternatively change its position to reverse the discharge direction of the printed continuous web. The printed and reversed paper can be stacked on the upper surface of the manual paper guide plate.

Abstract: There is provided a surface-treated magnetic powder that can form a resin-bonded permanent magnet with large magnetic force and a high maximum energy product, which magnetic properties do not decrease even after the long periods of time. The surface-treated magnetic powder is obtained by treating a magnetic powder made of an alloy that comprises a rare earth metal and iron with a treatment agent containing a alkali-modified silica particles as a major component, wherein the alkali-modified silica particles are obtained by reacting silica particles with a mean particle diameter of from 0.005 to 0.1 .mu.m with an alkali to modify only the surface portion of the silica particles by the alkali.

Abstract: A feeding apparatus for a printer wherein an uppermost sheet of a sheet stack placed on a support member is delivered by a feed roll in contact with the uppermost sheet, through a clearance formed between a presser member which engages the upper surface of the uppermost sheet, and an elastic member which is disposed adjacent to the presser member for abutting contact with the edges of the sheet stack. The apparatus includes a support mechanism for supporting the presser and elastic members such that the two members are movable toward and away from each other, and a biasing spring for biasing the two members toward each other. The relative position of the presser and elastic members and the amount of the clearance therebetween during a normal sheet feeding operation are determined by a stopper device.

Abstract: A printer includes improved paper feeding mechanism. A manual paper guide plate below an automatic paper feeding device can guide a thick piece of paper into a printing position on the platen without bending it hard around the platen. A pin tractor below the manual paper guide plate can feed a continuous web substantially straight into the printing position. A print head below the platen prints out on the lower surface of printing paper, whereby the printed individual cut sheets of paper being piled up one after another with the printed surface facing downward in a proper paper order. A paper tray for holding the printed paper can alternatively change its position to reverse the discharge direction of the printed continuous web. The printed and reversed paper can be stacked on the upper surface of the manual paper guide plate.

Abstract: An actively controlled suspension system employs a shut-off valve which is responsive to a source pressure dropping below a predetermined level to shut-off communication between a pressure return line for returning the fluid pressure to the pressure source from a hydraulic cylinder. The shut-off valve is disposed in a drain line connecting a drain port of a spool valve assembly and the pressure source. By the presence of the shut-off valve, substantial pressure difference between the hydraulic cylinder side and pressure source side of the spool valve is not created. Therefore, no leakage through the spool valve occurs and whereby the pressure in the hydraulic cylinder can be maintained even when the source pressure becomes substantially low or zero.

Abstract: A method of laser trimming in a semiconductor wafer, and more particularly, a method of laser trimming for disconnecting programmable links by use of a laser beam which links are provided within a multiplicity of semiconductor integrated circuit elements formed in the semiconductor wafer.

Abstract: A toner density detecting device is provided with a coil buried in a housing and a cover member provided on one end of the coil to prevent the developing agent from touching the coil. The cover member has a front end portion provided near the surface of the housing and extending along the developing agent flowing direction and an apex portion at the back of the front end portion with respect to the direction. The apex portion projects deeper into the developing agent than the front end portion. An edge connecting the front end portion and the apex portion extends in the direction to cross the central axis of the coil. A pair of faces extending in the direction on either side of the edge are gradually declined from the edge toward the surface of the housing.

Abstract: A damping force regulation device for a telescopic shock absorber causes all the hydraulic fluid to flow through a damping force adjuster (variable orifice) which is arranged in series with damping valves, both in expansion and contraction strokes of a piston. The diameter of the orifice is variable to control the damping force over a substantial range and thereby set up a damping characteristic optimum for each specific running condition. During the expansion stroke, a check valve of a base valve is opened to eliminate short suction which would otherwise result in cavitation or noise.

Abstract: A process for vitrifying liquid radioactive waste is provided.In this process, a solution of a water-soluble vitrifying-facilitating inorganic compound in liquid radioactive waste is mixed with a solution obtained by hydrolyzing an alkyl silicate and then the solution mixture is left to gel. Thereafter, the resulting gel is irradiated with microwave to calcine the gel, and the calcined gel is further heated to melt and then cooled to obtain a vitrified product.

Abstract: This invention relates to the novel 1,6-naphthyridine derivatives useful as antidinic and/or cerebral circulation improver, such novel derivatives being represented by the following general formula: ##STR1## (wherein R is a C.sub.2-10 alkyl which may have hydroxyl, lower alkylcarbonyl, lower alkyloxycarbonyl or phenoxy as a substituent; a C.sub.2-10 unsaturated aliphatic hydrocarbon group having unsaturated double bond(s); a phenyl-lower alkyl which may have halogen, lower alkyl, lower alkoxy or lower alkylthio as substituent(s) attached to the phenyl ring; a cinnamyl which may have halogen, nitro, lower alkyl or lower alkoxy as substituent(s) attached to the phenyl ring; propargyl; 1-naphthylmethyl; 2-thenyl; cyclohexenyl; a cycloalkyl-lower alkyl with a 3- to 6-membered ring; 1/2(C.sub.2-4 alkylene); 1/2(butenylene), or diphenylmethyl, and in case two alkoxyl groups are present attached to the phenyl ring, they may be bonded to form a ring) and salt thereof.