Abstract: A propelling clutch apparatus for a working vehicle comprises a friction type hydraulic clutch mounted on a propelling line, a valve for adjusting an oil pressure applied to the hydraulic clutch, a sensor for detecting angular acceleration of a rotary shaft included in the propelling line, and a control unit for controlling the hydraulic clutch in response to a change in a vehicle running state. The control unit effects controls in three stages. The first stage includes a preliminary step of narrowing spaces between friction disks of the hydraulic clutch by applying the oil pressure at a maximum level to the hydraulic clutch for a predetermined time from receipt of a clutch engaging command, and a subsequent main step of applying the oil pressure with predetermined characteristics. The second stage is for maintaining the hydraulic clutch in a half-clutch state when the angular acceleration in an accelerating direction or a decelerating direction reaches a predetermined value.

Abstract: A device for measuring torque in a shaft without contacting the latter. A torque transmitting shaft is formed with at least one detecting magnetically anisotropic region inclined to form an angle with respect to the axis of rotation of this shaft. A detecting coil is disposed on the periphery of the detecting magnetically anisotropic region. When the detecting voltage for the detecting coil changes owing to temperature changes and time-dependent changes, the changes in the detection sensitivity and in the zero point take place, leading to errors during torque measurement. Correct measured values can be obtained by having a device for correcting such changes in sensitivity and zero point.

Abstract: New Iron-Neodymium-Boron base alloys containing hafnium diboride, zirconium diboride and titanium diboride are disclosed. The alloys are subjected to rapid solidification processing technique which produces cooling rates between 10.sup.5 to 10.sup.7 .degree.C.second. The as-quenched filament, ribbon or particulate, powder etc. consists predominantly of a single amorphous phase. The amorphous powder is heat treated above the crystallization temperature into microcrystalline powder which is subsequently ground into ultrafine particles with average size less than 5 microns by attritor or hammer mill. The ultrafine powder particles are simultaneously aligned and cold compacted by the combined action of an applied magnetic field and uniaxial pressure. The green compacts containing particles with mostly aligned grains with their easy magnetization axes parallel to the applied field direction are sintered into bulk forms.

Abstract: The posture of a front loader attached to a vechicle body is controllable by an apparatus which comprises an engaging portion provided on a control lever, an engageable member pivoted to a fixed member on the vehicle body and releasably engageable with the engaging portion when the control lever is positioned for lowering the boom of the loader and for moving the work implement of the loader for scooping, an implement sensor for detecting whether the angle between the implement and the boom is an angle which provides contact of a work implement bottom surface parallel with horizontal ground, and a release interlocking mechanism operatively connected to the sensor and to the engageable member for moving the engageable member to a released position where the member is not engageable with the engaging portion upon the sensor detecting that the work implement is at the angle.

Abstract: In a waste heat recovery system for a liquid-cooled internal combustion engine, including a water jacket of a liquid-cooled internal combustion engine in which a portion of the heat generating in the engine is absorbed by an engine cooling liquid, a first heat exchanger is provided for heat absorption from the exhaust gas in which the exhaust gas heat is absorbed thereby and a second heat exchanger is provided for heat recovery in which the waste heat is recovered from the engine cooling liquid carrying the above-mentioned heat. A second circuit for waste heat recovery from the engine includes the first heat exchanger and the second heat exchanger, both being connected to the water jacket in series. The second circuit is adapted to return the engine cooling liquid within the water jacket to the water jacket through the first heat exchanger and the second heat exchanger by a forced circulation force or a natural circulation force.

Abstract: A change speed control structure for a hydraulic transmission comprising a rotary valve for controlling a plurality of hydraulic actuators, a shift lever extending through a crooked guide groove, and a relay assembly for transmitting movements of the shift lever to the rotary valve on a reduced scale. The guide groove includes three straight portions extending parallel to one another in series and offset in a transverse direction thereof, each straight portion including a plurality of change speed positions. An adjacent pair of the straight portions are interconnected end to end by a bight portion.

Abstract: In an air-cooled type cooling system for an engine working machine assembly in which a working machine such as a generator, a compressor and the like is adapted to be driven by an internal combustion engine, there are provided an air-cooled engine, a working machine and an exhaust muffler in a machine area as well as a centrifugal cooling fan in a fan room within a casing. An exhaust air outlet passage and an exhaust air conduction passage are provided in such a manner as to come out in parallel from the periphery of the fan area. Part of the cooling air sucked into the fan area after cooling the engine and the working machine in the machine area is adapted to be discharged directly outside the casing through the exhaust air outlet passage, and the remaining part thereof is adapted to be discharged outside the casing through the exhaust air conduction passage after cooling the exhaust muffler.

Abstract: A method and apparatus for pulverizing a material such as sand to a desired particle size. The apparatus has a pulverizing shell in which the material to be pulverized is fed and pulverized. The pulverized fluid-carried material overflows the shell so as to be fed into a settling classifier, where the coarser material settles and is discharged through its bottom opening back into the shell for repulverization. The finer material overflows the classifier and is fed to an intermediate bin, which has its bottom connected to the shell through a valve. When the bin is filled up with the material, the valve is opened so that the material in the bin is returned to the shell. The material is thus circulated through the shell, classifier and intermediate bin. The shell is adapted to be alternately connected to the intermediate bin and a product collector bin by a changeover valve.

Abstract: A hydraulic control apparatus for a tractor comprising a control valve for a hydraulic unit for a work device, a position control lever and a draft control lever for changing over the valve through position and draft link assemblies, a position feedback assembly, a draft feedback assembly for switching the valve to maintain the draft on the work device at an approximately constant value, and a position control spool operating arm and a draft control spool operating arm arranged above and below the spool of the valve in intersecting relation thereto, the draft feedback assembly being interlocked with the draft link assembly. The control valve is disposed under the case of the hydraulic unit, while the link assemblies are accommodated in a space inside one side wall of the case and having an open lower side to make the apparatus easy to assemble.

Abstract: A power steering apparatus comprising steering arms for steering front wheels of a vehicle mounted at opposite ends of an axle, and a power cylinder extending parallel to the axle for driving the steering arms. The axle is oscillatably supported by an axle frame through a center shaft. The power cylinder is connected to the axle by a connecting device to be movable in three-dimensional directions. The connecting device includes a support shaft extending parrallel to the axle, an oscillatable arm connected to the support shaft, and a universal joint for interconnecting the oscillatable member and the cylinder. The universal joint has an axis extending perpendicular to the center axis.

Abstract: A lawn mower comprising a cutting unit disposed between front and rear wheels, a grass discharge duct extending rearwardly from the cutting unit, and a grass collecting container defining a top opening for receiving grass clippings sent through the discharge duct. The grass collecting container includes a mouthpiece extending along peripheries of the top opening to rest on a U-shaped support frame mounted at a rear end of the mower. The mouthpiece is connected to the support frame by a projection and bore engagement. The support frame includes a holder defining an upwardly opening recess, and the container has a cover defining a downwardly opening recess at a position opposed to the holder. The two recesses define an opening for receiving a rear end of the grass discharge duct. The grass discharge duct includes an annular engagement portion extending peripherally of the rear end thereof for engagement with inner edges of the two recesses.

Abstract: A frame has mounted thereon an engine and a speed change unit arranged adjacent to each other widewise of the frame to provide a vehicle body. The vehicle body has a front axle supporting a pair of front wheels thereon, a rear axle supporting at least one steering rear wheel, a mount assembly at its front portion for attaching thereto a mower having at least one cutter, and a clipping container mounted on its rear portion. From a clipping outlet formed in the rear portion of the mower, a duct extends rearward generally horizontally under the front axle, is bent upward behind one of the front wheels and is connected to the clipping container.

Abstract: In a waste heat recovery system for a horizontal liquid-cooled internal combustion engine, the engine heat absorbed by the engine cooling liquid in a water jacket and the exhaust gas heat absorbed thereby in a heat exchanger for heat absorption from the exhaust gas (a first heat exchanger) are adapted to be recovered from the engine cooling liquid in a heat exchanger for waste heat recovery (a second heat exchanger). The first heat exchanger and the second heat exchanger are located on the upper side of the engine body of the internal combustion engine. And the engine cooling liquid outlet of the water jacket and the engine cooling liquid inlet of the first heat exchanger are communicated with each other directly, and the engine cooling liquid outlet of the first heat exchanger and the engine cooling liquid inlet of the second heat exchanger are communicated with each other directly.

Abstract: New Iron-Neodymium-Boron base alloys containing diboride based on zirconium, titanium or tantalum are disclosed. The alloys are subjected to rapid solidification processing technique which produces cooling rates between 10.sup.5 to 10.sup.7 .degree.C./second. The as-quenched filament, ribbon or particulate, powder etc. consists predominantly of a single amorphous phase. The amorphous powder is consolidated into bulk shapes by the method of hot extrusion. The bulk alloys consist of a ultrafine grained homogeneous crystalline phase dispersed with ultrafine sized particles of zirconium diboride, titanium diboride or tantalum diboride either singly or combined. The bulk alloys exhibit superior hard magnetic properties suitable for many engineering and scientific applications.