Abstract: To provide a glass substrate with an antireflection film, which employs glass having high refractive index and which has excellent strength, and an optical member comprising it. A glass substrate with an antireflection film, comprising a glass substrate which consists of glass having refractive index (nd) of from 1.68 to 2.00 and which has plate thickness of from 0.01 to 2 mm, and an antireflection film formed on at least one principal plane of the glass substrate.

Abstract: A method for operating a shaft furnace which comprises charging the furnace with an iron source having a low degree of metallization and thus requiring reduction, an iron source having a high degree of metallization and thus requiring nothing but melting, and a solid fuel, and blowing an oxygen-containing gas at ordinary or higher temperature up to 600.degree. C. into the furnace through tuyeres to reduce and melt the iron sources. The optimal values of .eta.co (gas utilization factor) are determined from the average degree of metallization of the iron sources, and the shaft furnace is controlled so that the effluent gas from the furnace has the optimal .eta.co values. The control is accomplished by regulating the height of the charge, regulating the height of the coke bed, etc., using multistage tuyeres, and radially partitioning the charge. Thus, the iron sources can be efficiently reduced and melted at a low fuel ratio.

Abstract: A vibration damping device includes first and second accelerometers which are used to determine the relative displacement between a body and a base between which the device is operatively connected. The output of one of the accelerometers is also monitored in a manner to determine the frequency of the vibration. This data is processed in a manner to ascertain the timing when the phases of a vertical spring input (produced by the compression of an elastomeric member which defines the main spring of the damper) and an expansion spring input (produced the displacement of rheopetic fluid between first and second variable volume chamber and the associated expansion characeristics of the members defining the same) are reversed. Using this data and the vibration frequency data the timing with which a voltage should be applied to electrodes disposed in an orifice interposed between the first and second chambers to increase the viscosity of the rheopetic fluid and increase the flow resistance of the orifice.

Abstract: A vibration damper includes first and second electrode bodies which are operatively connected with a vibrating body and a base, respectively and which are immersed in a rheopetic fluid. The relative velocity and displacement between the body and the base are determined and used to control the voltage applied across the electrode bodies in manner wherein when the relative displacement and velocity are out of phase, a high voltage is applied to electrodes to induce a high damping force and as the period wherein the two parameters go in phase is approchaed, the voltage is continuously reduced to reduce the damping force.

Abstract: An ignition timing adjusting apparatus of an internal combustion engine is provided so as to suppress the vibration of the body of a vehicle when it is accelerated. This is achieved by obtaining a first ignition timing compensation magnitude determined on the basis of the revolution speed fluctuation of the internal combustion engine and a second ignition timing compensation magnitude determined on the basis of the engine load condition, and by compensating a basic ignition timing in accordance with the first and second ignition timing compensation magnitude when the vehicle is accelerated.

Abstract: A preload device for a harness is mounted fixedly to a motor vehicle seat and the harness is also fixed to the seat, so that relative relation between the harness and the seat is constant irrespective of longitudinal adjustment of the seat with respect to floor of motor vehicle.

Abstract: A steering column is split into two column sections, the rear upper section of which is tiltable in a direction away from the head of a vehicle driver during a collision of the vehicle.

Abstract: A steering column assembly for a motor vehicle having a collision sensor which provides a collision signal in the event of a collision. It comprises a telescopic steering rod having a lower part and an upper part carrying a steering wheel, and means for normally stopping the upper part axial movement relative to the lower part in its normally operative position and for driving the upper part to a retracted safe position in the direction toward the lower part upon receipt of the collision signal.

Abstract: An inertia sensor switch comprises an insulating housing having an electrical contact plate connectable to one electric terminal, an electrical contact mass abuttingly engageable with the electrical contact plate and resilient means for holding the electrical contact mass to a position spaced from the electrical contact plate, in which the resilient means is a U-configured resilient strip of an electrical conductive material having one leg fixed to the electrical contact mass and other leg secured to the interior of the insulating housing, the other leg being connectable to another electric terminal cooperating with the one electric terminal, the U-configured resilient strip lying in a plane normal to deceleration due to up and down vibration of the vehicle, the U of the U-configured resilient strip being open to a transverse direction relative to a longitudinal direction of the vehicle.