Abstract: A cutter wheel for a dredging apparatus mounted for rotation about a shaft and having outwardly projecting cutting blades mounted on openings formed in the cylindrical peripheral plane of said wheel, while a stationary suction mouth is provided inside said wheel which is adapted for being in fluid communication with the cutting blades on rotation of said wheel, said suction mouth being connected to said shaft so that it may be rotated by means of a piston-cylinder assembly to change its angular position.

Abstract: This invention relates to an aqueous dispersion type coating composition comprising a homogeneous mixture of an aqueous medium, synthetic resin particles and a scaly aluminum pigment.

Abstract: A projection apparatus for optical systems such as a projection type microscope or the like, which is adapted to project an image of a sample disposed on a movable stage onto a television monitor screen and display it thereon, and which comprises an image sensor composed of a charge transfer element including photosensitive elements aligned with a picture element and operative to receive the image of the sample to be projected; a driving circuit for scanning the image sensor; a television monitor for displaying a video signal obtained from the image sensor when it is scanned by the driving circuit; a memory device for storing the television signal; a stage movement detecting circuit for detecting the movement of the stage; a timer circuit for generating a signal everytime a given time elapses; and a drive control circuit device, when the stage is moving, becomes operative to operate the driving circuit on the basis of the output from the stage movement detecting circuit so as to scan the image sensor everytim

Abstract: A calling party's telephone number displaying device in which, while the telephone set of a subscriber is ringing in response to calling signals from a telephone exchange office, the telephone number of a calling party and information are displayed on digital display units at high speed before lifting the handset. Accordingly, the subscriber can determine whether or not he should answer the call before picking up the handset. Thus, his privacy can be protected from a variety of telephone troubles such as wrong number and nuisance calls. The display is maintained as it is even if the handset is put back after the talk but it will be cleared automatically upon reception of the next call to display the telephone number of the next calling party. When the subscriber picks up the handset to make a call, the internal circuit is automatically changed to display a telephone number dialed by him.

Abstract: A composite type acoustic transducer of a flat drive type electrodynamic transducer and a piezoelectric type transducer. A diaphragm has a membrane of any suitable shape made of high molecular piezoelectric material such as polyvinylidene fluoride, an electrode layer applied on one surface of a membrane, and a coil like conductor applied on the other surface of the membrane. A supporting member supports the diaphragm along its edge. A permanent magnet device produces a magentic field extending in parallel to a plane of the diaphragm and perpendicular to the coil like conductor.

Abstract: A filter for purifying a fluid containing ferromagnetic particles, e.g. water in the primary circuit of a nuclear reactor using pressurized water, comprises a cylindrical envelope containing steel beads and provided with a coil for magnetizing the beads. The beads are supported in a cylindrical basket located in the cylindrical envelope and the side wall of which is perforated in certain zones. Deflectors are arranged within the basket radially opposite the perforated zones of the basket side wall. Fluid to be purified enters through a central drip tube which is provided with radial perforations in zones radially opposite the deflectors which serve to prevent fluid passing through the beads in a solely radial direction.

Abstract: A vibrating device having a mass rotated about a first shaft while the first shaft is rotated about a second shaft.

Abstract: The object of the present invention is an improvement in chromizing methods, constituted by a method of chromizing steels to a depth e greater than 30 microns, usable for steels with a carbon content of at least 0.2%, especially for steels for construction work and steels for tools, characterized by the combination of three successive treatments, the first of these three treatments consisting of an ionic nitriding of a surface layer between 100 and 350 microns thick, this ionic nitriding being realized in an atmosphere constituted by a mixture of nitrogen and hydrogen, at a temperature of between 450.degree. C. and 650.degree. C., for between 5 and 40 hours, so as to obtain between 1.5% and 2.5% nitrogen in the nitrided layer, the second of these treatments consisting of a chromizing by gaseous method forming chromium carbides, lasting between 5 and 30 hours, and realized at temperatures of between 850.degree. C. and 1,100.degree. C.

Abstract: In a hand-operated punching device such as that incorporated with a stapler to enable the same both to staple and perforate sheets of paper or the like, an improved punch element is provided which is movable into and out of a hole in a die for perforation. The punch element has three or more sharp-edged cutting teeth formed peripherally on one end thereof in order to improve the perforating or cutting ability of the device. The axis of the pivot pin connecting the base, lever and staple magazine lies in a plane extending transversely to the longitudinal axis of the punch element intermediate between the distal end thereof and a location thereon to which the punch element is allowed to advance relative to the inlet of the hole. Numerous variations are possible in the structural details of the punch element.

Abstract: A device for mining thick coal strata comprising a plough pressed in the ion of the floor by a ram, whereas in the vicinity of the roof the plough is pressed by a unit fixed to a canopy of the lining. The unit is provided with guides on which the plough is supported through a slide. A lever of a distributor is deflected by the plough and causes the unit to extend by an amount equal to the web of the plough.

Abstract: A driving gear for a mining machine comprising a coil chain wound over a driving wheel and a jockey wheel and co-operating with a rack mounted along a conveyor. A sweep-off gear is pivotably mounted in front of a slide of the machine at a level above the rack. The sweep-off gear has a sweep-off surface which is inclined both with respect to the longitudinal axis of the rack and the horizontal surface of the rack teeth for sweeping-off bodies from the rack onto the conveyor. Nozzles are provided on the gear for washing the rack with a water stream under pressure at an angle with respect to the surface of the rack.

Abstract: A driving device for a mining machine comprising an endless link chain exded on a drive wheel, a reversible wheel and a plurality of directing wheels and co-operating with a rack fixed alongside the conveyor. The directing wheels are each composed of two toothed rings separated by a circumferential groove. The outline of the teeth of the wheels is formed of sections of the sides of a regular polygon circumscribed on a circle, the tips of the teeth being truncated. In the intertooth spaces the wheel is provided with recesses below the pitch circle. The links of the chain lying in a plane parallel to the axis of the wheel seat on the flanks of two neighboring teeth, whereas the links lying in a plane perpendicular to the axis are seated in the circumferential groove. The reversible wheel has a shape identical to that of the directing wheels.

Abstract: An arrangement for opening textile fiber bales, particularly hard-pressed cotton bales. The fiber material is removed from above and moved by layers in the horizontal plane of the layer, and delivered to an opening element to break up the layer into fiber flakes. The entire fiber material of the uppermost layer may be moved towards the opening element. The arrangement has at least one conveying roller for moving the layer, and an opening roller cooperating with it. The apparatus may have two or more counterrotating conveying rollers above which the opening roller is located. The conveying rollers may rotate in the same direction and the opening roller may be horizontally adjacent. The peripheral speeds of the conveying rollers increase with the proximity to the opening roller. The conveying rollers may have toothed rings on the surface, and the toothed rings of successive rollers engage one another. A holding roller may be located between the opening roller and the conveying roller next to it.

Abstract: A power steering apparatus for a vehicle comprising a valve housing provided with a rotary type valve body rotatable in one direction or another by a turning operation of a steering shaft. An oil supply port is connected to an oil pressure pump that is selectively connected to either of one or another of cylinder ports connected to respective left and right chambers of a power cylinder. The valve body is provided with an intermediate partition plate extending into an oil pressure reaction chamber in the valve housing to divide the chamber into areas on opposite sides of the partition plate. The resultant pair of areas extend respectively on either side in the turning direction of the valve body, and the respective areas are connected to one or the other of the cylinder ports.

Abstract: The present invention is intended for the production of long, large diameter tubular blanks (over 5 m in length and over 800 mm in diameter). According to the method, positive pressure of an inert gas is created inside a spinning mold and maintained there in the process of pouring molten metal thereinto. That provides for the equal speeds of the mold rotation and the metal movement within the mold, and thereby promotes the production of tubular blanks with a uniform structure.

Abstract: A program-selecting device is used for a reproducing apparatus for reproducing at fast-forward speed or normal speed a recording medium on which a plurality of programs are respectively and distinctively recorded.

Abstract: A method of assembling tubular heat exchangers and particularly of expanding tubes in the tube walls of various heat exchangers and steam generators in the petrochemical, gas-processing, chemical, power, metallurgical and shipbuilding industries including the manufacture of nuclear power plants for ships, of nuclear power stations and related products. According to the method the measuring of a force parameter or variable is effected simultaneously with the measuring of a linear parameter or variable of the expanding successively at three areas, viz. the area of elastic deformation of the tube, the area of plastic deformation of the tube up to the engagement of the tube with the surface of the opening in the tube wall, and the area of elastic deformation of the tube wall.

Abstract: An automatic tool changing device comprises the head of a machining center and a drum vertically movably mounted on the outer end of the head, and rotatably arranged around a center shaft which is projected from the central portion of the drum to slant downwardly are a large number of arms each having an arbor holding portion at the forward end and formed in a predetermined position on the central back surface with an elongated groove adapted for engagement with a geneva drive pin, whereby when one of the arms is engaged with a main shaft or spindle in the head, the remaining arms are continuously arranged on each side of the engaged arm above a position spaced by a predetermined angle therefrom.

Abstract: A frequency band dividing filter comprises a delay-line filter which is supplied with an input signal and produces a divided frequency band signal as an output, a circuit for deriving a delayed signal in which the input signal has been delayed by a predetermined amount of time, and a circuit for substantially performing subtraction of the delayed signal output signal of the delay-line filter, and producing another divided frequency band output signal. The delay-line filter comprises a plurality of delay circuits cascade connected, coefficient multipliers respectively supplied with the input signal and the output signal of the delay circuits and for multiplying specific coefficients to the signals thus supplied, and an adder for adding output signals of each of the coefficient multipliers.

Abstract: A reversing hydromechanical transmission designed for transmitting power from the engine to the power consumer, i.e. the driven mechanism, of road building machines. The transmission comprises a reversing gear with at least two controlled clutches, a gearbox and a hydrodynamic drive, said units being kinematically interconnected. The input shaft of the reversing gear is connected to the engine shaft. At least one output shaft of the reversing gear is connected through the gearbox to at least one shaft of the hydrodynamic drive. The shaft of the turbine incorporated in the hydrodynamic drive is connected to the power consumer. The transmission constituting the present invention provides for smooth reversal of the power consumer, reduced energy expenditure in the traction and reverse modes of operation, efficient operation as a hydraulic retarder, and limiting the output torque in order to prevent slippage of the power consumer and to reduce dynamic loads.