Abstract: A fluid-pressure transmitting apparatus that is capable of securing the operationality of a working machine and braking and preventing against engine stall. The apparatus can switch between a working-machine operating device and a traveling operating device. When a second operating unit is operated during operation of a first operating unit, the pilot pressurized oil outputted from each operating means through first and second pilot-pressure admission passages is admitted to a low-pressure selecting valve. At this time, the pilot pressurized oil is automatically selected through the low-pressure selecting valve to control the delivery capacity of the traveling pump and braking and preventing engine stall and realizing travel at low speed.

Abstract: A fluid-pressure transmitting apparatus is provided which is capable of securing the operationality of a working machine and braking and preventing against engine stall. Furthermore, a fluid-pressure transmitting apparatus is provided which makes it possible to switch over, in arrangement relationship, between a working-machine operating device and a traveling operating device. When a second operating unit is operated during operation of a first operating unit, the pilot pressurized oil outputted from each operating means through first and second pilot-pressure admission passages is admitted to a low-pressure selecting valve. At this time, when the pilot pressurized oil to be admitted to the second pilot pressure admission passage is lowered, it is automatically selected through the low-pressure selecting valve to control the delivery capacity of the traveling pump and braking and preventing engine stall and realizing travel at low speed.

Abstract: A rotary connector, in which a guide ring is disposed in an annular space in such a manner that the guide ring elastically contacts with the lower side of the cover portion of an inner case, and the intermediate supporting portion of each of a plurality of cylindrical rollers is rotatably supported by the guide ring in the state that the rotation axis of each roller slants, also both end-sides of each roller contact with a flat cable, also the circumference-side of each roller contacts with the upper side of a lower-side-cover. The above structure realizes a highly reliable low cost rotary connector in which a noise caused by the each-other's bumps of the component parts of the rotary connector is suppressed and the stress applied to the flat cable is greatly decreased.

Abstract: A master station and a plurality of slave stations are connected in multi-drop connection. A carrier wave on an upstream transmission line between the master station and the slave stations is demodulated and re-modulated in each slave station and always maintained to be on-state. Both the modulating and demodulating devices are performed by a MODEM following the protocol CCITT V.28, respectively. Each MODEM used is connected to the respective slave station by a signal line following the protocol EIAR3 232C.

Abstract: A button of the type including a body of which bottom portion is formed with a recess or stepped part at the central area thereof, a fastening leg member made of resilient material, the fastening leg member having an opposing pair of end parts bent outwardly, and a holder with a slot formed therein through which the fastening leg member is inserted by manual force, wherein fitting of the fastening leg member to the body is achieved by way of the steps of fitting the holder onto the fastening leg member at the position as determined between the central part and the pair of end parts of the fastening leg member, inserting the pair of end parts of the fastening leg member through a slot on the bottom portion of the body, turning the fastening leg member within the slot and then causing the pair of end parts to be expanded in a pair of cutouts under the effect of expansive resilient force of the fastening leg member.

Abstract: A method for the liquefaction of brown coal which comprises effecting primary hydrogenation at a temperature and pressure sufficient to promote the efficient hydrogenation of a slurry prepared by adding an iron-based catalyst and a slurrying solvent to brown coal; distilling all or a portion of the primary hydrogenation product, whereby a naphtha fraction, a middle distillate oil fraction, a heavy distillate oil fraction and a distillation residue are produced; recycling a portion of said middle distillate oil, said heavy distillate oil fraction and said distillation residue to said primary hydrogenation step as the slurrying solvent; removing ash from the remaining portion of the distillation residue, thereby separating the same into an insoluble fraction containing ash, insoluble organic matter or a mixture thereof, and a soluble fraction as a solution in said solvent; and feeding said soluble fraction and said middle and heavy distillate fractions, to a fixed-bed column reactor packed with a molybdenum-bas

Abstract: An oxygen sensor whose sensing element is covered by a cylindrical porous filter cap, prepared by sintering metallic wool such as nickel-chromium alloy wool for protecting the sensing element from damage by mechanical shock and thermal shock due to a high flow pressure of a high temperature gas and for easy determination of sensing response time.