Abstract: Apparatus for the generation of compressed air includes a compressor, a motor for driving the compressor, a supply source of liquid lubricant for cooling the compressor, a storage container for the liquid lubricant, devices for separating the lubricant from the compressed air and for cooling the separated lubricant, and devices for controlling and regulating the procedures effected by the apparatus in the generation of the compressed air.

Abstract: In the positive control of piston compressor valves, during the suction stroke the pressure is sensed in the suction/compression space and the suction line and during the compression stroke the pressure is sensed in the suction/compression space and the delivery line with signals generated by the sensors being transmitted to a comparator unit. The comparator unit is connected to a control unit. Based on the signal sent to the comparator unit and the rated value for the operation of the compressor, signals are sent from the comparator unit to the control unit and, in turn, the control unit selectively regulates the suction valve and the delivery valve of the compressor.

Abstract: A bucket conveyor comprises a drive pulley and at least one guide pulley with endless traction cable means engaged over the guide pulley and the drive pulley. A bucket member or a conveyor trough has an axle thereon on each side and with a pulley on the axle. In one embodiment the pulley is pivotal on the axle and in another embodiment the pulley is fixed on the axle. In addition, the construction includes a guide pin on the trough on each side of the axle and the endless traction cable is trained around each guide pin and has a loop engaged over the pulley between the pins. In this manner the endless cable is guided between the drive pulley and the guide pulley and around the pin of each bucket and over the bucket pulley on an axle of the bucket and around the pin on the opposite side of the bucket pulley. The construction is applicable both for a fixed bucket in respect to the traction cable or a bucket that pivots or swings in respect thereto and in which the bucket pulley is rotatable on its bucket axle.

Abstract: A mixing car for transporting molten metals, comprises, a car undercarriage with a longitudinally elongated mixing vessel supported on the undercarriage at each end for rotation about a horizontally disposed longitudinal axis of the vessel. The support means at at least one end comprises a support bridge frame which is universally pivotally mounted on the undercarriage and is provided with journals on each side for accommodating a support roller shaft which is held in position in respect to the support bridge frame by an anti-rotation safety. The roller shafts include ends which extend outwardly from each longitudinal end of the bridge frame and hollow rollers are mounted on each projecting end of the roller shaft on suitable roller bearings. Interior support rollers are also provided which are affixed to the end of the shaft outboard of the roller bearings and which carry diametrically opposite rollers which engage and support the support rollers.

Abstract: A mining method for cutting away hard mineral materials of a mining face, comprises, undercutting the mineral material by directing a liquid jet into the running face to form a mineral slab which overlies the undercutting and breaking the bond of the slab from the main face by striking it with a wedge-shaped impact tool in the undercut area and conveying away the broken-off material. The apparatus for carrying out the mining operation comprises a machine which is adapted to run along the mining face alongside a conveyor for conveying away the material. The machine includes an operating mechanism for moving a breaking head at each end inwardly into the mine face and along the mine face. The breaking head carries a percussion wedge member which may be driven into the mine face.

Abstract: A shaft seal construction, comprises a shaft housing, with a shaft rotatably supported in the housing and having a shaft ring extending around the shaft which defines a ring seal face made of berryllium copper. A packing ring of aluminum has an annular packing ring face of an oxide of the aluminum which is engaged with the ring seal face. The packing ring is supported by a flexible closure member carried by the housing and engages with the packing and provides a gas seal with the packing ring around the shaft. The spring urges the packing ring into engagement with the shaft ring.

Abstract: A gas-sealed shaft packing, comprises a rotary sealing ring which is adapted to be fixed to the shaft for rotation therewith and which has respective end surfaces which are spaced apart slightly from respective fixed sealing rings to define a sealing gap on respective sides of the rotary sealing ring. The fixed rings are biased toward the movable ring and gas conduits extend from a housing into each fixed ring and terminate in the gap between the fixed ring and the associated rotary sealing ring. The fixed rings are held by flange members which extend radially inwardly from the housing toward the shaft and resilient diaphragms are disposed between the flanges and the fixed rings or non-rotatable rings so as to urge them toward the rotatable sealing ring carried by the shaft.