Abstract: An apparatus for the grinding of hard materials having a conveyor for forming a thin layer of material and moving the layer upward at an angle, and then causing the material in the upper region of the conveyor to tumble back down and along the surface of the upward moving layer, to generate a fine abraded product from the rubbing surfaces of the material.

Abstract: A control system for an accumulating conveyor having a plurality of zones wherein each zone has a pneumatic logic module that includes a relay limit valve and one or more OR valves. The output of one OR valve is connected to air actuators which affect driving engagement and disengagement of drive rollers with the load carrying rollers of a zone of the conveyor. A pilot operated relay valve is connected to the discharge zone of the conveyor and employed to release an article thereon. The control system can easily be modified to provide accumulation in either direction, as well as single, sequential or train release in both directions.

Abstract: A face seal assembly for preventing leakage of fluid around a rotating shaft of a machine, including a housing in the form of an annular U-shaped trough open at one end and closed at the other end. An annular seal element fits into the housing and is biased outwardly by a spring toward the open end into engagement with a mating ring. The seal element is held in the housing during assembly or servicing of the machine by two spring latch mechanisms which each include a formed spring fastened in a channel. The two spring mechanisms are welded to the inner face of the outer wall of the housing at diametrically opposed positions. The annular seal element has a notch in its outer circumferential wall on opposed diametrical sides to enable the seal element to fit snugly with the housing, with the channels received within the notches.

Abstract: A device adapted for use as a positively driven steering member in a conveying apparatus, having a wheel with a spherically curved inner surface, a hub with a spherically curved outer surface which fits inside of the wheel, and a coupling which secures the wheel to the hub, permitting the axis of the wheel to be rotated relative to the axis of the hub in any direction while restraining relative motion between the wheel and hub about the axis of the hub. This arrangement provides that, when the hub is driven by a shaft passing through its axis, it drives the wheel, regardless of the angle between the hub and wheel.

Abstract: Each face of the disc for sewage aeration includes a multiplicity of recesses. The recesses of one face have no communication with those of the other face and are precisely dimensioned so that the sewage, which is essentially water, flows into and out of each recess without leaving an accumulation of deposits in the recess. This is accomplished with no reduction of and possibly an increase in the aeration efficiency of the disc.

Abstract: Disclosed are powered roller, accumulating conveyors incorporating improved friction wheel drive means for transmitting driving forces to any given zone of the conveyor, independently of all other zones, from a single powered endless belt in a first embodiment and from a powered chain in second, third and fourth embodiments.

Abstract: An endless conveyor chain is a sequential assembly of block links formed of a polymeric material, interconnected by thin fleixble links of undulated shape, formed of either metallic or polymeric material, which are easily capable of flexing through their thicknesses, making it possible for the chain to negotiate lateral turns in the conveying run by producing edgewise flexure in the links. Large bearing stresses, which normally result in applications where chain joint lateral articulation occurs in nonlinear chain travel, are minimized or eliminated since the requisite lateral movement is allowed by flexure in the thin links away from the chain joints.

Abstract: A piloted flexible torque transmission coupling including circumferentially spaced, axially aligned holes in the center member, pilot ring and hub of the coupling for ease of assembly and disassembly of the coupling. The same bolts are used to both assemble the coupling for normal operation and disassemble the coupling.

Abstract: A vane-type variable displacement pump is controlled by a first stage servo-valve. The servo-valve is controlled by a second stage which may optionally include devices which provide any of several desired control effects.

Abstract: The casing of a pump defines a threaded hole into which is inserted an outer block for reacting radially directed forces transmitted by a second inner block from a movable, pressurized cam ring surrounding the pump rotor. The blocks have mutually parallel mating surfaces arranged generally tangential to the ring. Onto one of such surfaces is bonded an anti-friction bearing material, such as a woven fabric or metal, to facilitate sliding action between them. The eccentric position of the cam ring is partly established by the action of system pressure acting on control pistons while the guided motion of the inner block further positions the ring to optimal adjustments made to the outer block.

Abstract: A press assembly having an improved frame including a crown, bed, cylinder, and ram assembly tied together by tie rods and compression members in which a platen assembly secured to the ram assembly guides directly on the inward facing surface portions of the tie rods. Associated compression members juxtaposed around the outward facing surface portions of the tie rods provide stability to the whole press assembly and form part of an enclosure about the press assembly. Washers having outwardly tapering transverse portions are mounted on each tie rod to prevent bending of the tie rods at their ends.

Abstract: A slip friction drive for powered roller conveyor apparatus which minimizes coupling of forces between the driving engagement and the bearing surfaces and additionally provides an adjusting means for compensating for the varying frictional forces caused by changing loads.

Abstract: A method of rigidifying the normally flexible joint of a flexible torque transmission coupling without the use of support arbors. The joint of the coupling is axially compressed to provide both angular and axial rigidity of the coupling prior to balancing in a conventional manner. The method of compressing the joint may be adapted to accommodate the particular coupling being balanced.

Abstract: A press crown having a central plug characterized by having a greater stiffness than the surrounding transitional region connecting the plug to a plurality of lugs. The shape of the press crown transfers a significant portion of the deflection to occur in the transitional region. This substantially reduces the possibility of the deflection causing undesirable lateral forces to act upon the tooling apparatus.

Abstract: In the activated sludge process for treating wastewater loss of biologically active microorganisms from the aeration-mixing tank to the clarifier is reduced and the biological process whereby wastewater is treated is made more efficient by the addition of inert solid particulate matter to the liquid while in the aeration tank to provide mobile sites upon which the organisms will attach and grow.

Abstract: A process for removing colloidal and soluble contaminants from impure water moving through a hollow, cylindrical microscreen under a positive head pressure, comprising dispersing insoluble, finely divided particulate matter into the impure water and rotating the microscreen at a rate that will form, during each rotation thereof, an intermixed layer of contaminants and particulate matter over substantially the entire inner surface of the microscreen through which the impure water is passing. The intermixed layer forms a filter substantially impermeable to contaminants and particulate matter of a size that could pass through the microscreen pores, but it is not impermeable to water. Preferably, the finely divided particulate matter can be a sorbent material, e.g. powdered activated carbon, so that contaminants are both filtered and sorbed from the water.

Abstract: An epicyclic steering differential for use with a vehicle that is driven by tracks provides steering control and differential action to the vehicle by way of a set of differential cluster gears disposed about the pitch circle of the control gears with which the cluster set mates, engaging concurrently each of two adjacent cluster gears of the set, and driving two oppositely disposed drive gears that ultimately transmit power to the tracks. Each cluster gear has a pitch diameter equal in size to that of the control gears. The clusters are arrayed about the control gears so that the pitch diameter of adjacent clusters are mutually tangent and tangent also with the control gear pitch circle. In this way cluster gear transmits power at two points of meshing contact.

Abstract: A press assembly having an improved frame including a crown, bed, cylinder, and ram assembly tied together by tie rods and compression members in which a platen assembly secured to the ram assembly guides directly on the inward facing surface portions of the tie rods. Associated compression members juxtaposed around the outward facing surface portions of the tie rods provided stability to the whole press assembly and form part of an enclosure about the press assembly.