Abstract: A casting apparatus for casting a hollow slab out of concrete includes a feeder member having an axis extending between first and second ends thereof and a forming member supported on the apparatus adjacent the second end of the feeder member. A central longitudinal axis of the feeder member is moved at a first end thereof along a path of movement of a set shape and a point of the axis of the forming member is maintained in a stationary position relative to the axis of the feeder member.

Abstract: Equipment for loading a cargo space (2), such as an interchangeable platform or container, onto a vehicle and for its removal from same and/or for dumping the cargo space. The equipment includes a horizontal frame (4) pivotable around a transverse horizontal shaft (7) placed at its rear part, a folding frame (5), whose rear end (9) is attached to the front end of the horizontal frame (4), being pivotable around a transverse horizontal shaft (8), and a hook part (10) being pivotably attached about a transverse horizontal axis to the front end of the folding frame, the upper end of the hook part being provided with a grasping member (11) for engaging the cargo space (2). An arm (22) is attached by means of articulated joints between the hook part (10) and the horizontal frame (4) so that the articulation point (23) between the arm and the hook part is placed at a lower level than the articulation point (21) between the folding frame and the hook part.

Abstract: Method and slide-casting machine for the casting of hollow precast units of concrete by means of slide-casting. Concrete mix is extruded onto a base by using one or several shaping members that form a cavity and the mix is compacted by moving the shaping members. The outer face of the shaping members is provided with a projection or projections, or a projection or projections are formed at the outer face of the shaping members from time to time. The locations of the projections are changed to the longitudinal axis of the shaping members. Thereby the shaping members produce forces compressing the mix in the surrounding mix, i.e. forces that compact the concrete. It is possible to use shaping members in which the shape of the mantle portion can be changed so that the distances of the different points at the outer face of the shaping member from the longitudinal axis of the shaping member vary.

Abstract: A method of and a casting bed for producing a concrete product, especially an endless concrete blank prestressed in at least two directions. In order to enable a prestressing wire to be arranged in position and tightened in a simpler manner, at least one prestressing wire is passed in a zigzag-like manner crosswise between at least two fixed sides of a casting bed to form a wire net and the wire net is tightened from a third side of the casting bed in the direction of both first-mentioned sides so that the wire net is stretched in two directions by means of a traction in one direction. Finally, concrete is fed on the bed to form a prestressed concrete blank. An apparatus intended for carrying out the method comprises a weaving device for stretching the prestressing wires continuously and in a zigzag-like manner crosswise between two parallel sides of the casting bed and for tightening of the wires in the longitudinal direction of the casting bed.

Abstract: The invention relates to a hydraulic motor, in which a rotating motion is generated by a combined effect of a cam ring (2) and roller means (5) connected to the pistons (5) of a cylinder group (3).The object is to provide a new dummy coupling solution for a motor of this kind. To the cylinder group (3), preferably between two cylinders (4), is fastened a generally T-shaped support (8, 9) and round each branch (9) of the T is mounted a spiral spring (11) influencing respective piston (5). One end (12) of each spring influences the piston (5) through a passage (17) formed in the cylinder wall and the other end (13) of the spring leans against the support (8).

Abstract: An apparatus for preventing the solidification and accumulation of material from the tapping jet in and on the tapping spout in the manufacture of mineral wool includes at least one oxy-fuel burner at the discharge section of the tapping spout to the spinning machine. The burner (13) is disposed at such a distance and directed such that the discharge section of the tapping spout and the first portion of the tapping jet departing from the spout are heated by the burner flame and the impulse of the burner flame is of such a size that the configuration and position of the jet will remain unaffected.

Abstract: The invention relates to a hydraulic motor, which comprises a surrounding frame casing; an internal cylinder block with radially arranged cylinders and a stationary axle of the hydraulic motor attached thereto; pistons reciprocating in the cylinders and bearing the inner surface of the frame casing, which surface is formed as a running surface guiding the movement of the pistons; a fluid distributor mounted around the axle to rotate together with the frame casing, for the distribution of the hydraulic fluid into cylinder chambers and away therefrom via openings provided in the cylinder block; and feed and exhaust channels for the hydraulic fluid. The object of the invention is to improve such a hydraulic motor by compensating, without complicated balancing elements, the force caused by the pressurized hydraulic fluid and separating the fluid distributor and the cylinder block.

Abstract: Method and device for the casting of concrete products either by means of a periodic method or by means of a continuous slide casting method. Into the product, one or several cavities are formed by means of a cavity mandrel (4). The mix is compacted by rotating the cavity mandrel (4) back and forth around its longitudinal axis.

Abstract: The invention relates to a window having a channel between its glasses, through which channel circulation and/or fresh air is brought into a room. The object is to provide a new window which can function as the only heating element of the room. This object is achieved by providing the glass facing the room with an electrically conductive layer, whereby the said glass functions as an electric heating element, and by providing the inwards facing surface of the outer glass with a coating reflecting the heat radiating outwards from the heating element almost entirely back into the room. To make the recovery of heat more effective, a fan with actuating and regulating devices is preferably arranged in the window structure.

Abstract: A concrete building unit of a sandwich structure, comprising two concrete slabs (1, 2) positioned in parallel at a distance from each other and an insulating layer (3) filling the space between the concrete slabs. Wire trusses (5) are provided between the slabs and are cast in the concrete slabs at the opposite longitudinal edges of the trusses. In order to simplify the assembly of the insulating layer, a truss wire (6) of at least one wire truss (5) is stitched similarly to a sewing thread through an insulating material layer (7) in such a manner that a continuous wire forms loops (6a) protruding from two opposite surfaces of the layer. In a truss element (4) intended for such a building unit, the truss wire (6) is sewn into a beamlike insulating material layer (7) having a rectangular cross-section.

Abstract: A process for classifying a crystal mixture or for concentrating rocks or mixed crystals in particle form by capturing the particles in a gas flow for the purpose of separating particles of different size and weight by means of natural or artificial gravity is disclosed. The particles are heated to a temperature so high that a difference sufficient for separation is obtained in volume or weight between different particles. For spodumene, quartz and feldspar this temperature is about 1000.degree. C.

Abstract: A fluid substance is transferred in a shuttle (1) by means of a pressure difference in a tube, between a filling station and an emptying station, the end of the shuttle having an opening (8) covered by a closing member (9) which can be opened resiliently (11) towards the inside of the shuttle (1). The device for filling and/or emptying the shuttle has members for holding the shuttle (1) in place while it is being filled or emptied, and members for opening the closing member (9) and for filling and emptying the shuttle (1), the mutual position of the members for holding the shuttle (1) and the member for opening the closing member (9) at the filling and the emptying station being such or capable of being made such that the end of the opening member pushes through the opening (8) of the shuttle (1) into the shuttle to a distance beyond the closing member (9).

Abstract: Method for the casting of hollow slabs out of concrete by slide-casting. Concrete mix is extruded onto a base (18) preferably by means of a conical screw spiral (2). Thereinafter the mix is compacted by moving a cavity mandrel (3) fitted after the screw sprial. The end of the cavity mandrel (3) is moved along a path of movement of desired shape. The final end of the mandrel may be attached to the machine by means of a ball joint.

Abstract: Pre-fabricated modular panels for attachment to the exterior walls of existing buildings to provide supplementary insulation. The panels include exterior facing, vertical support ribs, spacer members, a fastening strip secured to the spacer members and compressible insulation mounted from the vertical ribs to provide a ventilation space between the insulation and the facing. When the fastening strip is fastened to the building exterior wall, the insulation contacts said wall and is compressed thereagainst in contour accommodating relationship.

Abstract: The invention is concerned with a method for continuous slide-casting of large-size concrete objects or corresponding elements for compacting high-viscosity casting mix. The slide-casting mould (33) comprises a bottom plane (34), side walls (38, 39) of the mould, as well as means (37) for pressurizing the casting mix mechanically. According to the invention, before the parallel side walls (44, 54) at the outlet end of the slide-casting mould (33), within the casting line concerned, walls or wall portions (40 to 43, 50 to 53) are provided as fitted to each other or to their corresponding portions, provided as pairs, as pivotable always in the same direction around substantially vertical shafts (45 to 49, 55 to 59) included in their planes. The moving parts of the side walls (38, 39) may be displaced in pairs in the lateral direction, relative the casting direction, e.g., by means of cylinder-piston devices (61 to 63).

Abstract: Method for the continuous slide-casting of concrete objects for compacting the high-consistency concrete mix. Repeated parallel displacements back and forth are produced in the various regional zones in the high-consistency concrete mix placed in the mould by pivoting at least two opposite walls (10) of the slide-casting mould structure in the same direction relative parallel shafts (12) substantially parallel to each other and as synchronized relative each other, back and forth. Additional walls (4) fitted into the mould and forming oblong cavities, recesses or ribs in the concrete objects are pivoted in pairs with each other in the same direction and as synchronized with each other around shafts (7) placed at the ends of the additional walls next to the outlet end of the mould, the said shafts being substantially parallel to each other.

Abstract: The invention relates to a method of making concrete used in hydrotechnical structures weather-resistant as regards the freezing of water absorbed into the pores of the concrete. The problem in this connection consists of the expansion of freezing water and the consequent state of tension in the concrete. According to the invention, a small amount of micro-sized rubber powder is mixed with the concrete mix, the rubber particles forming even-surfaced, closed buffers into which the water expanding when it freezes can expand without producing states of tension in the concrete. The rubber particles are ground from the rubber parts of used automobile tires.

Abstract: The invention relates to an inlet for a cooler in a rotary furnace. The lining of the inlet opening comprises a frame structure masoned of prefabricated lining blocks and a similarly prefabricated central part. The central part comprises a steel mould, a lining cast in the mould, and preferably also a transverse beam of steel. The central part is removably mounted in the steel jacket of the cooler inlet. The object of the invention is, on one hand, to permit a quick replacement of a worn lining of the cooler inlet and, on the other hand, to improve the quality of the lining because this can always be cast under controlled conditions.

Abstract: The invention is concerned with a method and a mould in the casting of large-size concrete objects or corresponding elements for compacting high-viscosity casting mix. Thereat, the mould (3 or 17) comprises a bottom (8 or 24) and side walls (6, 7) as well as, additionally, a deck (9 or 25) for bringing the high-viscosity casting mix present in the mould (3 or 17) mechanically under pressure. According to the invention, repeated parallel dislocations back and forth are produced in the various regional zones of the mechanically pressurized high-viscosity casting mix (1) present in the mould (3 or 17), and in particular in parallel dislocation planes (2) of the casting mix.

Abstract: Randomly distributed objects of piece goods in a state of translatory movement are identified and classified on the basis of a physical property thereof. The travel path of the piece goods is observed with a detector scanning the path transversally and indicating the wanted physical property, said detector generating an electric signal proportional to the observed physical quantity at each spot of the scanning line, within the resolution capacity of the detector. Thereupon, the electric signals are treated continuously in real time and converted into binary key number groups belonging individually to each particular object in the scanning line. The key number groups are processed during the scanning recursively in classifying units nominated for each particular object during its passage past the detector, and the classification is carried out on the basis of these key number groups.