Abstract: A mobile material handling machine includes a material handling element and an operator's control cab. A plate is pivotally attached to the material handling element in line with the operator's line of sight from the cab towards the element. The plate has first indicia on the edges thereof; second indicia on the top surface thereof; and third indicia on the bottom surface thereof. The first indicia is in line with the operator's line of sight when the material handling element is positioned at a predetermined angle relative to the operator's cab.

Abstract: A coating for a substrate includes a mix comprising sodium silicate, water and sialon powder. A defoaming agent is also added to the mix.

Abstract: Apparatus for controlling the air to gas ratio of fuel being supplied to a gas engine that utilizes the pressure in the inlet of the carburetor and the pressure in the intake manifold of the engine to control a regulator that is used to supply gas to the engine. The control mechanism is responsive to a signal from an intelligence source, such as an exhaust gas sensor, for varying the air to gas ratio to a preset or desired air to gas ratio. A method for controlling the air to gas ratio of fuel being supplied to a gas engine wherein an engine function is sensed and a signal generated representative of the function. The signal is compared with a reference signal and a resultant signal is generated. Pressure is then generated that is representative of the resultant signal and the pressure is applied to the regulator to cause a predetermined rate of flow of gas to the carburetor, thereby controlling the air to gas fuel ratio to the engine.

Abstract: The centrifugal pump is of the submersible type and is useful in pumping sand laden fluids. The pump includes a rotatable impeller and fixed diffuser and has an improved bearing that comprises an annular thrust member that is constructed from material having a hardness greater than the hardness of sand. The thrust member is attached to the impeller and has a bearing surface thereon. A second annular bearing member, which is also constructed from material having hardness greater than sand, is attached to the diffuser and has a bearing surface thereon disposed in juxtaposition with the bearing surface on the thrust member.

Abstract: An improved system and method for relocating a selected layer of overburden, such as a layer of unconsolidated soil, in a strip mining operation are provided. The system employs an excavator, an intermediate belt wagon with at least two slewable conveyors, and a cross-pit conveyor having a long cantilevered conveyor pivotably supported on a mobile base; with all of said equipment being preferably based on the highwall side of the pit. According to the method, the area to be stripped is divided first into a series of large rectangles aligned parallel to the pit, with each rectangle being further divided into a series of narrow strips also parallel to the pit. The area is then progressively stripped beginning with the nearest strip of a first rectangle and proceeding with the next adjacent strip until the first rectangle is completed and then proceeding in like manner with each successive rectangle.

Abstract: The shaft seal includes at least first and second annular land members that are located on the shaft and toward the housing, an annular spacer member positioned on the shaft between the land members, a generally annular seal member frictionally engaging the housing and located between the land members. The arrangement is such that changes in axial dimension of the shaft will cause repositioning of the seal member and thus maintain an effective seal between the shaft and the housing.

Abstract: An improved cross-pit conveyor is provided for transferring excavated topsoils from the working side across the pit to the reclamation side in a strip mining operation. The machine includes a base to be positioned on the working side, a slewable upper frame mounted on the base, a long cantilevered conveyor pivotably supported at one end by the upper frame and reaching across the pit, and a separate on-board auxiliary conveyor for initially receiving the excavated material and feeding it smoothly onto the cantilevered conveyor. The receiving end of the auxiliary conveyor is pivotably connected to the back of the upper frame, and the discharging end is floatingly supported on the receiving end of the main conveyor to maintain a constant cooperative association therewith regardless of the hoist angle of the main conveyor.

Abstract: A method of manufacturing a resilient side bearing of the type utilized between a truck and body of a railway vehicle includes the steps of providing a bearing housing; sealing the bearing housing to form an enclosed bearing chamber, pouring liquid resilient bearing material into the bearing chamber; permitting the liquid resilient bearing material to cure and become bonded to the interior surface of the housing to form the bearing; and removing the seals after the bearing material has cured.

Abstract: A truck for a railway vehicle including wheelsets each comprising a pair of wheels with an axle rigidly joining the wheels. A bearing assembly is provided at each end of the axle. A side frame having a pedestal jaw at each end accommodates therebetween one of the bearing assemblies, with the bearing assembly including an adapter member. The truck further includes a steering assembly operatively connected to the bearing adapter and thereby to the wheelset for radially steering the truck. The adapter member includes a main body portion underlying the pedestal jaw of the side frame, and an extension section extending axially of the axle inward from the main body portion towards the center of the truck. The adapter member extension section includes an upwardly facing, generally planar surface underlying a steering arm of the steering assembly. The arm is connected to and supported by the surface. Two spaced buttress type ribs project upward from the surface to receive the steering arm therebetween.

Abstract: A blowout preventer comprises a housing with a pair of opposed rams carrying sealing blocks for sealing against tubing extending through the housing. Openings in the front side of the housing provide access to the sealing blocks for changing the blocks and a door closes the openings during normal in-service use of the preventer. A door guide permits the door to be slid in either of two opposing edgewise directions for exposing the openings one at a time but keeps the door from being movable substantially in a broadwise direction. Sealing inserts disposed within the openings between the door and the sealing blocks serve to seal against leakage and a rack and pinion mechanism provides the means for sliding the door from a centered position closing both openings to opposite edgewise positions exposing one or the other of the openings.

Abstract: A microprocessor controlled rotating-cylinder viscometer for measuring the shear stress at a given shear rate of a fluid is disclosed. The fluid is contained between a rotatable outer cylinder and a rotatable inner cylinder. The inner cylinder rotates in response to the torque produced by rotation of the outer cylinder in the fluid. The amount of rotation of the inner cylinder is related to the shear stress of the fluid. A fast slewing accurate motor speed control is provided for maintaining rotation of the outer cylinder at the selected shear rates. An absolute value shaft encoder monitors the amount of rotation of the inner cylinder to obtain the shear stress readings. The steady state value of the shear stress is obtained by averaging a predetermined number of measurements taken over a sample interval to obtain a stress reading. Consecutive readings are compared until the difference between readings in less than .+-.1.degree., the current shear stress then taken on the steady state value.

Abstract: A device and method for preventing high pressure surges in fluidic material delivery systems to instruments such as a flowmeter, by the use of restrictors and a pilot operated valve to initially restrict the flow of the fluidic material before allowing total delivery thereof to prevent damage to such meters and other type members.

Abstract: Monitoring the torque applied by the rotary table to the drill string and the RPM of the drill string is provided. An intermediate adapter is positioned between the drill Kelly and the rotary table. A strain gauge is attached to the intermediate adapter to measure torsional deformation and provide an indication of rotary torque. Transmission of torque data is accomplished by radio frequency transmission utilizing a transmitter on the intermediate adapter. A receiver is mounted to the side of the drill rig floor to receive and demodulate the torque signal. The intermediate adapter is rotating at the same rate as the drill string. Detection of the revolutions utilizing the changing R.F. field strength is accomplished at the edge of the drill rig platform or elsewhere with a stationary sensor which doubles as the torque receiver. A highly directional torque transmitter antenna mounted on the adapter is used with the major lobe lying parallel to the rig floor and perpendicular to the pipe.

Abstract: The improved decoking nozzle assembly described hereinafter includes both first and second stage decoking nozzles that can be selectively utilized. The nozzle assembly includes a hollow body having ports therein providing fluid flow to the first and second stage nozzles, a sliding valve mechanism inside the hollow body that includes apertures arranged to be selectively aligned with the ports and with the first or second stage nozzles, and a stop member that is engageable with the valve member to retain the valve member in the selected position.

Abstract: The inlet control valve described herein is useful in connection with pneumatic tools or the like that include a hollow tool body containing an air motor. A control valve is disposed in an inlet passageway extending to the air motor. The valve includes a first valve member that has a seal engaging an annular valve seat. A second valve member extends through a bore in the first valve member and is disposed in sealing engagement with a second annular seal member carried by the first valve member. The second valve member includes an operating member that also extends through the bore into engagement with the trigger mechanism of the tool so that displacement of the trigger to a first position tilts the second valve member off its seat permitting restricted flow through the passageway. Additional movement of the trigger displaces the first or main valve member off its seat permitting the maximum flow through the passageway.