Abstract: A method of limiting the discharge pressure for turbo compressors by means of a blowoff control which is controlled by an anti-surge controller along with means for measuring the discharge pressure and an extreme value selector as well as means for measuring the pressure flow rate and for generating a signal from a manual controller, comprises, measuring the discharge pressure, comparing the measured pressure with a desired maximum pressure to produce a pressure control signal, measuring the compressor flow rate, comparing the measured flow rate with a minimum permissible flow rate to provide a flow rate control, directing a signal from a manual controller to the value selector to generate a manual controller signal and feeding each of the pressure control signal, flow rate control signal, and manual controller signal to the anti-surge controller to provide a control of the blowoff valve in accordance therewith.

Abstract: A cooling device for use with a refractory lining in a smelting plant, such as a blast furnace and particularly a shaft furnace, includes an inner refractory lining, an outer steel jacket, and a plate member located between them. Preferably, the plate member is cast and anchoring members are cast into each plate member and extend only from the plate member surface facing toward the steel jacket. The anchoring member secures the steel jacket and plate members together and also holds them in spaced relation. Various embodiments of anchoring members can be used. In one embodiment a blind bore is provided within the anchoring member and a thermocouple extends into the blind bore from the steel jacket for measuring the operating temperature of the plate member.

Abstract: A composite underground shaft lining assembly particularly suitable for use as a leak proof water conduit is formed with a plurality of annular concrete sections joined together by interposed layers of flexible joint material forming a composite concrete cylinder, with a composite steel cylinder formed of annular steel sections being arranged about the outer cylindrical surface of the composite concrete cylinder. The annular steel sections of the composite steel cylinder are joined together by spring rings located adjacent the flexible joints formed between the annular concrete sections.

Abstract: A hydromatic planer particularly for mining materials in a mining seam comprises a planer housing which advantageously has a cutting and breaking head on each end thereof, each of which includes a substantially identical construction. Each cutting head includes a vertically arranged support member which is mounted on the housing of the planer by a parallel linkage so that it may be moved upwardly and downwardly under the control of an adjustment means such as a fluid pressure operated piston and cylinder combination. Each cutting and breaking head also includes a first substantially vertically arranged support member which is connected by the linkage for upward and downward movement relative to the housing and a second support member which is movable relative to the first and mounted on this first in vertical guides for upward and downward movement.

Abstract: A vehicular power shovel having its movable shovel member located forwardly of the front axle thereof is equipped with a toggle lever device and a hydraulic power cylinder mechanism for actuating the shovel member. The shovel member is mounted upon a lift arm structure which is pivotally mounted upon the frame of the apparatus at a point behind the front axle. Both the toggle lever device and the hydraulic power cylinder mechanism are pivotally attached to the frame of the apparatus and are located behind the front axle. The power cylinder operates to actuate the toggle lever device and it is connected thereto at a point other than the buckling joint of the toggle lever. Furthermore, the power cylinder is located rearwardly of the point at which the rear end of the lift arm mechanism is pivotally connected to the frame.

Abstract: A subsurface coal bunker operating to receive and discharge coal is structured with an assemblage of nested telescopic container members including one stationary member and a plurality of movable members, with the container members being formed in size in a graduated series with each container member being sized to fit into a next larger container member adjacent thereto. The movable members are telescopically extensible and contractible in order to vary the volume of the assemblage and the bunker assembly is provided with a first belt conveyor for feeding material into the assemblage and a second belt conveyor for transporting material therefrom. A reversible drive mechanism, consisting of hydraulic cylinder devices actuating a system of drive chains and pulleys, is mounted on a support frame of the bunker and operates to drive the movable members between the extended and contracted positions.

Abstract: A cooling plate for a furnace for use in metallurgical plants made of cast iron with steel tubes therein for carrying a cooling agent, wherein the tubes have a jacket of one or more layers on the outside thereof, the first layer being a carbide-stabilizing metal and the other layers being thermally resistant metal oxides or mixtures of metal oxides and alloys of metals. The tubes are resistant to carburization and provide improved heat transmitting properties.

Abstract: A method of regulating the output quantity of compressed medium of single and multi-stage screw and turbo compressor systems, comprises, throttling the suction to the compressor systems with a throttling valve by fluid-pressure operation of the valve, sensing the pressure of the discharge of the compressor systems, closing the throttle valve in accordance with the pressure which is sensed and bleeding the medium after it is passed through the compressors and in a proportion to the pressure which is sensed and only after the throttling valve is moved through a proportional closing movement. The device for operating the compressor systems for regulating the quantity of medium includes a throttle valve in the suction having a valve member movable between opened and closed positions and with a control piston connected to the throttle valve to shift the valve member.

Abstract: A diffusion barrier and separation substance for metal parts which adjoin each other in an oxygen-free, inert and preferably a helium-containing atmosphere such as used in a closed-cycle high temperature reactor or gas turbine comprises first and second adjoining metal parts with a hexagonal boron nitride placed between said parts. The hexagonal boron nitride is applied to the boundary surface of the metal parts in an aqueous or organic suspension prepared as a pasty, putty-like or brushable liquid substance. The substance contains from 5 to 50% of boron nitride, from 0.5 to 30% of binders and from 2 to 6% of swelling agents and 50 to 90% liquid suspension medium. The suspension medium may advantageously contain an anti corrosive agent and in addition the formed protective film is burned from 0.25 to 3 hours at a temperature of from 100.degree. to 500.degree. C.

Abstract: A high-speed rotation system susceptible to vibration includes a relatively thin and flexible shaft which has first and second ends, a rotating member disposed on the first end of the shaft, and a planetary gear including a torque-transmitting sun gear which is connected to and restrains the second end of the shaft. A magnetic bearing surrounds at least part of the rotating member for damping the vibration of the rotation system.

Abstract: A floating dry dock system comprises a main or central boxlike dry dock which for example may include a bottom and a side wall on each side and a lifting pontoon associated with the central unit which is adapted to be flooded so as to be positionable completely across the bottom of the central unit. The pontoon made of a size sufficient to permit it to be ballasted to raise the central unit above the level of the water so that the portions thereof which are not covered by a pontoon are freely accessible on their bottoms above the sea level. The pontoon advantageously includes at least one console on one side to accommodate the ballasting equipment and it has advantageously mated separable bottom box shaped tanks which are interconnected with a side tank having a console and upward extension.

Abstract: A diffusion barrier and separation substance for metal parts which adjoin each other in an oxygen-free, inert and preferably a helium-containing atmosphere such as used in a closed-cycle high temperature reactor or gas turbine comprises first and second adjoining metal parts with a hexagonal boron nitride placed between said parts. The hexagonal boron nitride is applied to the boundary surface of the metal parts in an aqueous or organic suspension prepared as a pasty, putty-like or brushable liquid substance. The substance contains from 5 to 50% of boron nitride, from 0.5 to 30% of binders and from 2 to 6% of swelling agents and 50 to 90% liquid suspension medium. The suspension medium may advantageously contain an anti-corrosive agent and in addition the formed protective film is burned from 0.25 to 3 hours at a temperature of from 100.degree. to 500.degree. C.

Abstract: A mixer truck for shipping molten metals in an elongated, substantially cylindrical vessel, which has an end portion with a plurality of annular bearing rings extending therearound, comprises a truck body with a frame plate girder which is universally mounted on the body. The frame plate girder carries two spaced sets of rollers forming a rotational cradle support for each of the ring members on the cylindrical vessel. A drive motor, carried on the universally mounted frame plate girder, is connected to drive a sprocket wheel or gear extending around the vessel between the rings.

Abstract: A method of avoiding emission of carbon monoxide from the exhaust gases of oxygen converters comprises collecting the gases of the converter in a cooling stack and directing the gases from the cooling stack through a dust collector to a clean gas stack in which they are permitted to flow out through the top and preferably through a burning device for burning them off. To insure that the gases remain burnable an additional fuel gas is fed into the clean gas stack for combining with the other gases and in quantities which are proportional to the content of carbon monoxide and oxygen in the gases which are circulated. An apparatus for carrying out the method includes a connection between a cooling gas stack in which the gases are collected from the converter to a clean gas stack which includes a dust collector and a blower for circulating the gases.

Abstract: A housing for friction and antifriction bearings comprises a cavity defined in the bearing housing between roller bearing 6 which has at least one bounding wall which is elastic and exposed on one side to the internal pressure of a lubricating chamber and on its opposite side to the exterior of the housing.

Abstract: The compressor includes a housing defining a pressure space including chambers and passages connected thereto for conveying sealing and lubrication liquid to and from an impeller shaft rotatably mounted in the housing. The impeller shaft is stepped and mounted for limited radial movement, and includes an elastically bendable torsion shaft portion having a diameter which is a minimum with respect to the torsional stresses imposed thereon. A relieving piston is carried by the torsion shaft portion and the impeller shaft further includes a main compressor shaft portion carrying at least one impeller. A torsion shaft sealing surrounds the torsion shaft portion and serves as the main sealing forming a shield between the pressure within the pressure space and atmospheric pressure.

Abstract: A multi-stage axial flow turbine and blast furnace compressor blower comprises a blower having a degree of reaction of 100% and which includes a rotatable shaft having a plurality of rings with blades defining moving blade rows arranged in spaced location with a plurality of guide blade rows. The construction includes a plurality of stages between an iniaial and a final stage which include a moving ring with two relative moving blades and a single guide blade row. The initial and final stages are arranged so that the stages include either an initial single moving blade row and a final stage consisting of a single guide blade row and a single moving blade row or the initial stage comprises a single guide blade row and a moving ring with two rows of blades and the final stage comprises a single guide blade row.

Abstract: A tubular apparatus, particularly a steam generator, in which U-shaped or straight tubes are inserted in the casing. A series of gratings are provided in the casing and comprise parallel grating elements made up of grating bars and cross-bars formed to firmly hold the tubes in place and separate them from one another. Facilitation of inserting the tubes in the casing is accomplished by emplacing grating elements corresponding to grating elements in other gratings first and continuing in a like manner.

Abstract: The closed gas turbine plant is fitted with at least one by-pass valve serving as an adjusting member for the working medium cycle, and uses measuring transformers for measuring the working medium cycle high and low pressures as well as the actual and nominal speeds of the turbine. A regulator has a first regulator part including an integrator, and the difference signal, between the speed nominal value and the speed actual value, is processed in this first regulator part. The regulator has a second regulator part in which signals representative of the working medium cycle high pressure and the working medium cycle low pressure are combined in an adding manner and the output signals of the two regulator parts are supplied to a third regulator part which controls the by-pass valve or valves.