Abstract: Mitomycin derivatives containing substituted dithioethylamino groups at the 7th position are provided. The mitomycin derivatives according to the present invention are superior to mitomycin C with respect to their improved anti-tumour activity and toxicity. More particularly, they exhibit a wider tolerance of dosage against Sarcoma 180A solid tumour as well as a better survival time and weaker bone marrow supression against P388.Furthermore, certain compounds exhibit a high water-solubility which is advantageous for pharmaceutical purposes. Excellent anti-tumour agents may readily be prepared by using the derivatives of the present invention.

Abstract: The invention relates to an electric motor driven vehicle having a driving unit assembled with a motor and transmission mechanism. In order to avoid a load in a low rotational state of the motor, the transmission mechanism is connected with the motor and driving wheel within a range of predetermined rotational numbers in which the motor approaches the vicinity of maximum efficiency. Accordingly, motor driving is possible from the start, and because of the small electric power and the low heat generating quantity, cruising distance is extended and the apparatus is consequently made to be compact and of light weight. The transmission is provided with an automatic starting clutch and an automatic transmission is used as the automatic transmission, operation of the motor near the vicinity of maximum efficiency can always be maintained in the usual speed change range. The driving unit can be constructed compactly as a power unit of swing type.

Abstract: A picking control apparatus for providing stable picking operation in a jet loom. The apparatus comprises an angle correcting section for outputting an angle correction amount of a picking start angle on the basis of an arrival angle deviation of filling yarn and a pressure correcting section for outputting a pressure correction amount of an injection pressure in a locking nozzle on the basis of a flying term deviation of filling yarn. The angle correcting section promptly corrects and controls a change of an arrival angle caused by a variation of flying characteristic of filling yarn, and thereafter the pressure correcting section corrects and controls a flying term so as to be adjusted to a set value. As a result, a stable picking operation in which only the picking start angle is not excessively deviated can be accomplished.

Abstract: There are disclosed a foamable composition which comprises (A) a vinyl chloride resin, (B) an inorganic substance containing inorganic fibers of not less that 1 .mu.m diameter, (C) a solvent having properties such that when a mixture, which is composed of 100 parts by weight of a vinyl chloride resin of average polymerization degree of 2400, 100 parts by weight of the solvent, and 6 parts by weight of dibasic lead stearate, is kneaded using a plastograph at 30 rpm while raising the temperature it exhibits a maximum torque of 4 to 25 N.m on the kneader, and (D) a decomposition-type blowing agent; and a process for preparing such; a rigid, foamed article made therefrom; and a process for preparing such article. Since the rigid, foamed article of the invention does not contain asbestos, it is not injurious to human safety and health.

Abstract: An SOHC type internal combustion engine comprises a pair of intake valves and a pair of exhaust valves, which are carried in a cylinder head, for opening and closing operation, at a small angle formed by axes of both the pairs of the valves in a projected view on a plane perpendicular to a crankshaft axis including an axis of a cylinder, a single cam shaft rotatably disposed above a combustion chamber, a single rocker shaft fixedly disposed above the combustion chamber, a plurality of intake rocker arms interposed between the cam shaft and the pair of intake valves and swingably carried on the rocker shaft, a pair of exhaust rocker arms interposed between the rocker shaft and the pair of exhaust valves and swingably carried on the rocker shaft, and a plug insertion cylindrical portion which is provided in the cylinder head between both the exhaust valves and into which is inserted a spark plug disposed at a substantially central portion of a ceiling surface of the combustion chamber.

Abstract: A valve system for an automobile engine opens and closes intake and exhaust valves by reciprocative force of a crankshaft. Specifically, the valve system controls timing for operating and stopping these valves, and the amount of cam lift. The valve system comprises a camshaft, a rocker shaft in parallel to the camshaft, a main rocker arm mounted on the rocker shaft, a sub-rocker arm pivotally supported on the rocker shaft, engaging means for engaging and disengaging the rocker shaft with and from the sub-rocker arm, and driving means for driving the engaging means. The engaging means includes an opening on a rotating surface of the sub-rocker arm, a plunger located in the rocker shaft and an oil chamber located at an upper or lower end of the plunger. The driving means includes an oil gallery in the rocker shaft and an oil pressuring member.

Abstract: A cruise control device is provided with a vehicle speed sensor for detecting the actual vehicle speed, and an electronic controller for controlling the opening of the throttle valve based on the detected vehicle speed, to bring the vehicle speed close to a target vehicle speed. The electronic controller serves to obtain a vehicle speed deviation between the target vehicle speed set by a set switch and the actual vehicle speed, select one of a P control mode, a P/D control mode and a fuzzy control mode corresponding to the magnitude of the vehicle speed deviation, and control the opening of the throttle valve. In addition to these functions, the electronic controller may additionally have the function of estimating a change in the vehicle speed provided that the current opening of the throttle valve is maintained, to obtain a correction value for the vehicle speed so that a corrected vehicle speed corrected by the correction value is used to control the opening of the throttle valve.

Abstract: A screw type coupling device includidng a male screw element formed by installing a coil spring form helical component on the outer surface of a columnar element and a female screw element formed by installing a coil spring form helical component in a tubular element so that the two helical components are screw engaged with each other. With the application of such coupling device to an antenna for vehicles, the antenna having the male screw element at the base is removably attached to a vehicle body by screwing the male screw element of the antenna to the female screw element installed in the vehicle body.

Abstract: A white colored deodorizer comprising titanium oxide and at least one alkaline earth metal oxide selected from the group consisting of magnesium oxide and calcium oxide and a method for preparation of it are disclosed.

Abstract: A storage vessel detecting mechanism is used for detecting an error condition of a storage vessel, which is detachably fitted in a main apparatus. The vessel is movably fitted in the main apparatus, and one end of a movable member, which is pivoted, is engaged with the vessel. The other end of the movable member is located between first and second positions when the vessel is not installed and when the vessel is accommodating a predetermined amount of substances therein. It is determined whether the other end of the movable member is located in a predetermined range. An error condition of the vessel is detected when the other end of the movable member is located at a position other than in the predetermined range.

Abstract: A projection positioned in the center of a concave section of a toroidal combustion chamber is divided into a section with a steep slope extending from the bottom to the head surface and a section with a gentle slope. The head surface is in the form of a flattened conical trapezoid. Because of its shape, the projection makes it possible for the air which is close to the center section to flow close to the surface of a side wall of the concave section. The air which had been at the center section is added to the amount of air supplied for combustion and is mixed with the fuel in the vicinity of the surface of the side wall of the concave section. By setting the angle at which the air flows along the side wall surface (re-entrant angle) in the combustion chamber, the flow of the air close to the side wall surface is made turbulent, which improves the agitation of the fuel.

Abstract: A prepaid card processing device processes a prepaid card provided with a memory for storing information related to an account and a printing portion on which monetary information is to be printed. The prepaid card processing device comprises a reading/writing portion for reading the information stored in the memory and for writing information into the memory. A recording portion records monetary information on a receipt and a recording control portion carries the prepaid card to the recording portion so that the monetary information can be printed on the printing portion of the card. A single recording portion thus records monetary information on both the receipt and the printing portion of the prepaid card.

Abstract: A tool driving unit for moving a tool in axial direction thereof and for rotating the tool about its axis. The tool driving unit comprises a spindle supported in the housing frame, a tool chuck mounted on the one end portion of the spindle for holding the tool, a first motor including a first hollow rotor and for rotating the spindle, a second motor including a second hollow rotor and for moving the spindle in the axial direction, means for transmitting a rotation of the first hollow rotor to the spindle, and means for converting a rotation of the second hollow rotor into axial movement of the spindle. The first rotor is rotated to rotate the spindle which corotatably engages the first rotor through the transmitting means. The second rotor is rotated, and the spindle is smoothly moved axially forwardly or rearwardly by the converting means which converts rotary motion of the second rotor to axial motion of the spindle.

Abstract: New peptide derivatives of which utility in the treatment of such diseases as rheumatoid arthritis, peridental diseases, corneal ulcer and epidermolysis bullosa is expected. These compounds are hydroxamic acid derivatives of tetrapeptides having a specific inhibitory activity against collagenase derived from vertebrates.

Abstract: An exhaust gas cleaning device for controlling the air-to-fuel ratio of the air-fuel mixture supplied to an internal combustion engine (1) provided with a catalytic converter (14) disposed in the exhaust pipe (13) is disclosed. The air-to-fuel ratio is oscillated around the central level of the integral control or proportional plus integral feedback control signal based on the output of an air-to-fuel ratio sensor (12); the amplitude of oscillation and the proportional control amount are, or alternatively, the frequency of the oscillation is, varied in accordance with the operating condition of the engine.

Abstract: A linear ultrasonic motor which presses a rail against an ultrasonic vibrator, which is substantially elliptically vibrating and conducts relative movement, wherein a protrusion or a groove is provided such that the sectional form of the rail is concave, convex, trapezoidal or triangular. Furthermore, the above vibrator is provided with a groove or a protrusion which uniformly abuts the groove or protrusion of the rail. In the linear ultrasonic motor according to the invention, there is no deterioration of responsiveness due to a support mechanism and no unnecessary vibration, so generated noise is small.

Abstract: A polyphenylene ether resin composition, comprising a polyphenylene ether resin and a rubber-reinforced styrenic resin, said composition containing rubber particles dispersed therein, which particles having a distribution of sizes such that there are at least one maximal value at 1.5.mu. or less and at least one maximal valve at 2 to 3.mu. in volume fraction of the sizes, with the ratio of the former maximal value to the latter maximal value being within the range of from 1/4 to 4/1, and substantially no rubber particles having a size of 3.mu. or larger exist. The composition can be used widely for uses such as industrial parts, electrical parts, office instrument housing, automobile parts, precision parts, etc.

Abstract: A permanent antistatic resin composition which comprises 100 parts by weight of a block copolymer and from 0.1 to 2.0 parts by weight of an antistatic agent, said block copolymer comprising polymer blocks of a vinyl aromatic compound, polymer blocks of a conjugated diene compound and polymer blocks of a lactone compound, wherein the content of the vinyl aromatic compound is from 10 to 100% by weight and the content of the conjugated diene compound is from 0 to 90% by weight, provided that the sum of the vinyl aromatic compound and the conjugated diene compound is from 30 to 99% by weight, and the content of the lactone compound is from 1 to 70% by weight.

Abstract: Several embodiments of water cooled outboard motors embodying an exhaust system that includes at least one expansion chamber contained within the drive shaft housing and that is provided with a coolant jacket. A catalyst is positioned in the exhaust system within the expansion chamber for treating the exhaust gases delivered from the engine to the expansion chamber. The coolant from the cooling jacket is delivered back to the body of water in which the watercraft is operating without flowing into the expansion chamber so as to protect the catalyst from water damage. In some embodiments, plural expansion chambers are incorporaed. In these other embodiments, the expansion chambers are arranged so as to preclude the likelihood of water impinging on the catalyst if it enters through an underwater exhaust gas discharge opening and also the arrangement is such that water will not contact the catalyst when the outboard motor is tilted up to an out of the water condition.