Abstract:
A high density optical recording medium having wide-width grooves capable of reliable tracking is provided. The optical recording medium is formed with the wide-width grooves 12 in which a width g of the groove 12 is larger than a width L of a land between the grooves. The lands 11 and the grooves 12 are formed so that a track pitch Tp is less than 1 .mu.m, and a land height h from a groove bottom surface 13 satisfies [(.lambda./(8n)).multidot.Ltan.theta.]/[Ltan.theta.-(.lambda./(8n))].ltoreq.h.ltoreq.[(.lambda./(5n)).multidot.Ltan.theta.]/[Ltan.theta.-(.lambda./(5n))] with respect to a wavelength .lambda. of a reproducing light beam and a refractive index n of a substrate. An angle of inclination of a groove side wall is represented by .theta., and the refractive index of the substrate is represented by n. Even when the width L and the height h of the land is changed due to any optical blur, the disturbance of diffracted light from a land shoulder 19 is suppressed, making it possible to obtain a stable track position control signal.
Abstract:
An oil pump for a lubricating system of an outboard motor is disclosed. The motor has a cowling defining an engine compartment, a water propulsion device, and a guide member having an upper surface and a lower surface, the guide member positioned in the cowling and generally dividing the engine compartment into an upper part and a lower part. An engine is positioned in the upper part of the engine compartment within the cowling and has an output shaft arranged to drive the water propulsion device. The lubricating system includes an oil pan positioned below the guide member and an oil passage leading from the pan through the guide member. The oil pump is positioned in the upper part of the engine compartment, but below the engine, and is driven by a lower end of the output shaft of the engine which extends below the engine, the oil pump having an oil inlet in communication with the oil passage through the guide member.
Abstract:
An outboard motor embodying a twin overhead camshaft, four cycle internal combustion engine as a power plant. The engine has an improved flexible transmitter drive for the camshaft, which permits the drive pulley to overly the end main bearings for the camshafts so as to reduce bending loads on them.
Abstract:
An outboard motor for a watercraft includes a simply structured fuel supply system of a smaller size and a longer life than prior fuel supply systems. The fuel supply system includes a delivery fuel tank carried by the outboard motor. Fuel is pumped from an external fuel supply tank carried by the watercraft to the delivery fuel tank by a low-pressure fuel pump located within the outboard motor. A control system controls the low-pressure fuel pump so that a predetermined level of fuel is maintained in the delivery fuel tank. The control system includes a fluid level detection sensor that detects the level of fuel within the delivery fuel tank and produces a corresponding signal indicative of the fuel level. A control unit circuit receives the fluid level signal and determines if the fluid level in the tank is higher or lower than a predetermined maximum fuel level. If the fluid level is determined to be higher than a maximum fuel level, the control unit circuit deactivates the low-pressure fuel pump. If the fluid level is determined to be lower than the maximum fuel level, the control unit circuit activates the low-pressure fuel pump.
Abstract:
In editing a program, when a reference variable name of a predetermined program line is designated, a line variable i (its initial value is 1) and line information n are compared. If i.gtoreq.n, the processing is ended. If i
Abstract:
An outboard motor having a powerhead with a powerhead with a compact internal combustion engine induction system and fuel supply system. The induction system includes a plenum chamber or surge tank that is formed as a housing on an end of the engine opposite to that where the engine induction passage serving the combustion chamber is formed. This common housing also forms passages for carrying fuel between the supply system and the fuel injector including a vapor separator formed integrally in said, housing.
Abstract:
A liquid precursor containing a metal is applied to a substrate, RTP baked, and annealed to form a layered superlattice material. Prebaking the substrate and oxygen in the RTP and anneal is essential, except for high bismuth content precursors. Excess bismuth between 110% and 140% of stoichiometry and RTP temperature of 725.degree. C. is optimum. The film is formed in two layers, the first of which uses a stoichiometric precursor and the second of which uses an excess bismuth precursor. The electronic properties are so regularly dependent on process parameters and material composition, and such a wide variety of materials are possible, that electronic devices can be designed by selecting from a continuous record of the values of one or more electronic properties as a continuous function of the process parameters and material composition, and utilizing the selected process and material composition to make a device.
Abstract:
A loader conveys a holder, carrying thereon a disc cartridge, between a cartridge ejection position and a reproducing/recording position. The loader has an engaging part which engages with a lock mechanism so as to release a holder pin in the lock mechanism from its locked condition in order to hold a movable chassis in a floating condition and to lock the holding pin in the lock mechanism so as to fix the movable chassis to the stationary chassis when the holder comes to the cartridge ejecting side. When the holder is moved to the reproducing/recording position, the holding pin provided on the holder engages with a shutter closing spring so as to retract an engaging part at the front end of the shutter closing spring through an opening in the holder in order to prevent the disc cartridge from making contact with the shutter closing spring, thereby making it possible to give a satisfactory feeling of insertion of the disc cartridge and avoid damaging the disc cartridge.
Abstract:
An air intake system for an engine powering an outboard motor is disclosed. The engine is positioned within a cowling of the motor, the cowling including an air intake vent. The engine is vertically positioned, having a camshaft drive at an upper end thereof, the camshaft drive enclosed by a drive cover. An air passage is defined between the drive cover and cowling and leads from the vent to an engine air intake. The air intake comprises a passage formed by the cover and extending therethrough. The passage through the cover leads to a throttle body having a throttle plate therein, the throttle body connected to a surge tank from which runners extends to provide air to the combustion chambers. Air flows through the passage in the cover through a flexible hose member extending between the cover and the throttle body.
Abstract:
A braking apparatus that achieves an extremely small number of components, simple construction and reduced manufacturing cost and so forth, along with a rolling guide unit on which it is equipped. The above advantages are obtained by providing a braking member, formed by integrating a base portion and clamping portions into a single unit, and clamping a track rail with those clamping portions by elastically deforming the base portion. According to this constitution, the member for producing braking force by clamping the track rail is essentially only that braking member.