Abstract: Resistors are connected between word lines and bit lines running transversely with respect thereto. The resistors have a higher resistance than the word lines and the bit lines. The bit lines are each connected to a sense amplifier which regulates the potential on the respective bit line to a reference potential and at which an output signal can be picked off. If one of the word lines is selected and all the other word lines are put at reference potential, then the resistance of the resistor, which is assigned to an information item, can be read from the output signal.

Abstract: A storage cell is described which includes a storage element whose electric resistance represents an information unit and can be influenced by a magnetic field as well as a transistor which when the information is read out allows for the corresponding storage cell to be selected from among the storage cells. To write the information unit, a write line and a bit line are provided which intersect in the area of the storage element and are able to generate the magnetic field. The storage cell is disposed between the bit line and a shared voltage supply connection. The storage cell is disposed between the bit line and the write line and the write line can coincide with a gate line that controls the transistor. The transistor is a planar or vertical transistor. The storage element and the transistor can be positioned next to or on top of each other.

Abstract: A storage cell is described which includes a storage element whose electric resistance represents an information unit and can be influenced by a magnetic field as well as a transistor which when the information is read out allows for the corresponding storage cell to be selected from among the storage cells. To write the information unit, a write line and a bit line are provided which intersect in the area of the storage element and are able to generate the magnetic field. The storage cell is disposed between the bit line and a shared voltage supply connection. The storage cell is disposed between the bit line and the write line and the write line can coincide with a gate line that controls the transistor. The transistor is a planar or vertical transistor. The storage element and the transistor can be positioned next to or on top of each other.

Abstract: A process for the selective reclamation treatment of used foundry sands wherein separation of parts of the binding materials from the basic granular material is effected by mechanical means and, thereafter, the sand grains are accelerated to produce an abrasive action of the individual sand grains with one another. The treated grains are then separated into large and small grains and further treatment is effected on the small grains.

Abstract: The present invention relates to a process for treating old foundry sand for reuse in place of core sand wherein the precleaned sand grains are subjected to further abrasive-thermal treatment so as to volatize and remove basic constituents adhering to the precleaned sand grains.

Abstract: Method for purifying foundry sand which involves the passage of sand through layers of steel wool supported on perforated discs mounted on a vertical shaft in a standpipe. Perforations in the sides of the standpipe permit air to be blown through the sand as it drops down through the steel wool. The vertical shaft supporting the discs and steel wool is vibrated to cause the sand to move through and past the packs of steel wool.

Abstract: Apparatus for purifying foundry sand which involves the passage of sand through layers of steel wool supported on perforated discs mounted on a vertical shaft in a standpipe. Perforations in the sides of the standpipe permit air to be blown through the sand as it drops down through the steel wool. The vertical shaft supporting the discs and steel wool is vibrated to cause the sand to move through and past the packs of steel wool.

Abstract: A method and apparatus for removing form sand from a casting box and for comminuting and sand clods formed by the sand removed from the box, in which the casting box is placed on a grate having two grate portions, preferably tiltable about spaced tilting axes between a first position, in which the grate portions are located in a common substantially horizontal plane for receiving a filled casting box on its upper surface, and a second position in which the two grate portions extend upwardly inclined from a center line of the grate.

Abstract: Used foundry sand which is predominantly in the form of lumps containing a binder for the sand particles is regenerated. In the course of the regeneration, the lumps are comminuted and, simultaneously therewith, an at least partial separation of the sand and the binder is effected. The simultaneous comminution and separation is effected by a dry, mechanical procedure during which the lumps are subjected to an abrasive or scouring action. This is accomplished by means of a pair of vibrating or rotating brush-like members provided with steel bristles. These members are located adjacent the bottom of a trough-shaped strainer which permits the passage of sand particles having a size less than a predetermined size. A cover is provided for the strainer and serves to cause rebounding of particles which impinge upon it. A feed hopper feeds the lumps of used foundry sand to the brush-like members and a bar overlying the gap between the latter prevents entry of the lumps into the gap.