Abstract: Disclosed is a clamping device for securely locking a turret of a mud gun in operative position where a gun barrel, which has been traversed and elevated to a blowing position, has its nozzle firmly pressed against a tap hole of a shell of a furnace to blow a mud projectile into the tap hole.

Abstract: A negative disc brake comprising a cylinder assembly having a thrusting mechanism wherein a thrusting force of an actuating spring is normally transmitted to a thrusting piston through an actuating piston and an adjustment screw which is in screwed engagement with the actuating piston; the thrusting piston normally pushes one friction pad against a rotor; however, when a fluid pressure is applied, the actuating piston moves against the thrusting force of the actuating spring in the direction of taking off the brake; and a caliper assembly having a reaction member which pushes another friction pad against the opposite side of the rotor by a reaction force resulting from the thrusting force exerted on the other friction pad to push it against the rotor in the brake applying action of the thrusting mechanism, the caliper assembly and the cylinder assembly being arranged as independent components mountable and dismountable separately from each other.

Abstract: A ship's hull block consisting of a skin plate, and longitudinal and transverse members fastened thereto by tack welds, is erected in the upright position so that the flat, strength welding of the joints or intersections between the longitudinal and transverse members may be carried out.

Abstract: A roof assembly for an arc furnace is disclosed in which a furnace roof ring and a plurality of roof units are assembled together to define a roof section frustoconical in cross section and with a roof top opening, and a roof top made of an electrically insulating refractory and provided with electrode holes closely fitted into the roof top opening. Each sectionalized roof unit comprises a main body cast from cast iron or copper, and a cooling coil embedded in the main body with end sections being extended out of the upper major upper surface of the main body so as to be used as a cooling water inlet and an outlet. In order to ensure the satisfactory high-temperature strength and thermal-shock resistance, the inner major surface of the main body directed toward the inside of the furnace is partially lined with the refractory or corrugated.

Abstract: The invention discloses a vane-type rotary machine of the type in which at any angular position of a rotor which has a plurality of vanes slidably fitted into the radial vane slots and is rotated in a cam ring, the satisfactory contact of the tip of each vane with the inner surface of the cam ring may be ensured so that the discharge or intake through the ports formed through the side wall of the cam ring may be carried out with maximum efficiency.

Abstract: A particle charging device for use in a two-stage type of electric dust collecting apparatus, including opposite electrodes disposed at such positions that an intermittent ion generating zone is established between the opposite electrodes and ion generating electrodes, and that uneven, non-uniform electric fields are established between said opposite electrodes and transfer electrodes; a dust containing gas is ionized in the intermittent ion generating zone, and upon transferring the ions by means of the uneven electric field, said ions are brought in contact with a flow of particles in said dust containing gas to thereby charge said particles.

Abstract: An improvement of a swirl type fuel atomizer is disclosed in which a plurality of notches are equiangularly formed around an opening of a single-nozzle hole so that the liquid fuel injected may be divided into a plurality of fuel spray patterns. The complete combustion with a relatively low temperature may be ensured so that the emission of nitrogen oxides may be substantially eliminated or reduced.

Abstract: A servo-controller, where, in order to enable a second mobile member to carry out a certain programmed sequence of operations corresponding to the moving position, speed, pressure, force or torque of a first mobile member, the said moving position speed, pressure, force or torque of the first mobile member is detected as an analog signal, which is compared with each of various level signals sorted stepwise and identified so as to operate the corresponding relays in succession; where the successive actions of these relays is such that control is effected by a first switch group (on a pin board connection panel), a second switch group (for carrying out switching operations for the step subsequent to each member of the first group) and a third switch group for selecting the said level signal; a remainder derived from the difference signal between set signals passed through these first and second switch groups, respectively, is multiplied by another remainder derived from the difference signal between the said an

Abstract: The invention discloses a lifting device suspended from a crane and comprised of a lifting beam, the shackle suspending devices mounted upon the lifting beam and movable therealong toward or away from each other depending upon the distance of attaching holes of the like of a load to be lifted, shackle devices each rotatably attached to the lower end of each suspending device and including means for adjusting the angular position of the shackle device and means for advancing a shackle pin into the attaching hole or retracting it therefrom.

Abstract: A method and apparatus for discharging overboard the excess water from the hopper of a hopper suction dredger, barge or scow for removing the air bubbles contained in the discharged water and for preventing the air bubbles from being entrained into the discharged water in order to prevent the turbidity of the water in the dredging area.

Abstract: A liquid containing abrasives is projected through nozzles under high pressure upon the surface of an object to be treated such as sheet steel to descale and clean the surface thereof, and the projected abrasive liquid is recovered so that abrasives of suitable particle sizes may be reused. The jet liquid is a mixture of high pressure liquid and slurry abrasives which are substantially uniform in density and granular size. The mixed slurry after projection against the sheet steel workpiece is returned to a vertical style classifier before it settles to the bottom of the collecting tank. The scales which are removed from the sheet steel workpiece are separated out in the classifier while at the same time the density and the granular sizes of the abrasives are made uniform. In addition, the minuscule abrasives are caused to overflow from the classifier while the liquid and the slurry abrasives made uniform in density and granular size are conveyed to the nozzles.

Abstract: A steam supply control device is disclosed which is adapted for use with an electro-hydraulic governor so as to control the rotational speed of an auxiliary turbine such as a cargo oil or ballast pump turbine, a generator turbine or the like. The device can prevent the excessive momentary increase in rotational speed even in case of a sudden decrease in load such as air draw in pump, and can also control an extremely low rotational speed.

Abstract: A plurality of dampers are arranged and interposed between a spherical tank and its foundation in such a way that when the foundation shakes in case of an earthquake so that the spherical tank vibrates or swings relative to the foundation, the amplitude of the relative vibrations of the spherical tank may be controlled by the dampers.

Abstract: A hydraulic cylinder is disclosed wherein a seal ring is fitted around the side surface of a plunger which in turn is fitted into a cylinder in such a way that there is a clearance between the seal ring and the plunger, and oil passages are formed through the seal ring, thereby at the lower part of the seal ring, exerting to the seal ring the upward force which may encounter the downward oil pressure exerted to the seal ring.

Abstract: A double shell tank construction method is disclosed which comprises the steps of assemblying outer shell bottom and side plates, assemblying within the assembled outer shell an upper roof and an inner roof into a unitary construction, lifting the assembly of the inner and outer roofs to a predetermined height along the inner wall of the assembled outer shell, constructing a ring-shaped concrete, inner bottom plate foundation and arranging and disposing bottom heat insulation members within the ring-shaped foundation, assemblying an inner shell bottom plate over the ring-shaped concrete foundation and the bottom heat insulating members, and assemblying an inner shell by using the assembled outer shell.

Abstract: A suction cup assembly mounted on a mount which in turn is attached to a vessel or pier is attached to the pier or vessel and actuated by a vacuum pump or the like so as to make fast the vessel for towing or mooring without the use of the tow ropes or mooring ropes.

Abstract: A heat insulation structure for a liquefied gas storage tank is disclosed which comprises a plurality of heat insulation sandwich structure units attached to the outer tank shell. Each sandwich structure unit comprises a plurality of core members or ribs arrayed in spaced apart relation and sandwiched by a top and bottom plate members, and insulating materials filled into the spaces defined by the core members and the top and bottom plate members, and each core member or rib comprises a pair of plywood sheet members spaced apart from each other by a predetermined distance by spacers, and insulating materials filled into the space or spaces defined by the sheet members and spacers. The above construction not only gives much strength to the heat insulation structure in addition to the improved ability to interrupt heat conduction, but also reduces the fabrication cost.

Abstract: A device for charging materials into a blast furnace is disclosed in which a gear box which supports rotatably a ring gear has a pair of shafts swingably supported by a casing joined to the top of the furnace in such a way that the gear box may be caused to swing about the pair of shafts when the latter are driven. Furthermore, a chute is disposed within the gear box in such a way that it may be caused to swing in the directions at right angles to those of the swinging of the gear box by the rotation of the ring gear which in turn is driven by a drive shaft.

Abstract: Water lubricated bearing devices best adapted to be used in water or sea water are disclosed wherein a composite bearing member comprising an elastic bearing member lined with a thermoplastic resin compound is anchored to the inner wall of a bush fitted into a support member.

Abstract: A floating breakwater is disclosed which comprises a plurality of floating breakwater units interconnected with each other in side by side relation and anchored to the sea bottom with anchor cables or chains. Each floating breakwater units comprises a center float, a front and rear barrier joined thereto with connecting members in suitably spaced apart relation or directly joined to the center float so as to define the separated spaces therebetween. The pitching, heaving and surging of the floating breakwater may be minimized, and the waves of a relatively wide range of wave lengths may be effectively reflected and depressed or abated so that a safe and comparatively calm sea space may be provided behind the floating breakwater.