Abstract: The pouring ladle can not only be tilted by a tilting drive and a cable around a permanent tilting axis in order to pour the molten metal in a mould, respectively to interrupt the pouring process, but the tilting axis can be lifted and lowered by a determined value by a lifting drive. By lifting and lowering the tilting axis, the tilting motion of the pouring ladle takes place approximately in the center of gravity of the molten metal. This permits to avoid compensating streams and wave motions of the molten metal when the pouring ladle tilts forward and backward and more definite and reliable processes are achieved, capable to be controlled, at the start of pouring and at the time of terminating the pouring. The lifting drive and the tilting drive can be utilized for further lifting the pouring ladle in order to advance the pouring ladle further toward the center of the mould at the first pouring process under holding a determined distance of security from the mould.

Abstract: The back and the braking body of the brake shoe are both formed as cast iron elements. The brake shoe, mainly consisting of molded parts, allows a particularly rational manufacture by casting operations or as a composite casting in one and the same casting mold, the casting mold being divided into casting cavities for the back and the braking body by a steel sheet. Cast-in steel reinforcements may be provided as well.

Abstract: There is provided a method and apparatus for dividing a moving stack of flexible workpieces, such as paper hand towels, face towels and the like, which are interfolded with one another in a zigzag manner, into partial stacks comprised of predetermined numbers of such workpieces, and for transferring such partial stacks to a depositing table. One of the material webs participating in the manufacture of the flexible workpieces is first marked, the spacing between the marks being adjusted to correspond with the number of towels required in the partial stack. Downstream of the folding device, the stack formed thereby is reversed upwardly and scanned by an optical detector which reads the marking and controls a separating blade, which is driven into the stack and lifted. The gap formed by the separating blade is engaged by lifting forks, which lift the partial stack to the level of the depositing table, where the partial stack is taken over by transport forks and guided across the depositing table.

Abstract: The subject matter of the invention is constituted by a method and an apptus for the protection of a liquid in a container against the effects of atmospheric oxygen by the use of a fluid, which is placed as a barrier layer between the liquid to be protected and the atmosphere. The protective fluid is a liquid whose specific gravity is less than the specific gravity of the liquid to be protected and has a volume which is kept constant for the desired period of operation. The liquid which is protected is taken from the container under the protective liquid.

Abstract: A liquid discharge control system is provided for nozzles on a shearer or cutter drum for a drum-type shearer loader or heading or drifting machine used in underground mining. In addition to liquid discharge nozzles are distributed about the periphery of the cutter drum there is also provided cutting tools which are distributed about the periphery of the cutter drum. A liquid supply line delivers pressurized water to a valve for each nozzle or a group of nozzles. The valves are operated to control the discharge of water from only those nozzles or group of nozzles which are opposite the mineral face operated on by the cutting tools. The nozzles spray high-pressure jets of water to assist the cutting operation of the tools, to control dust or for suppressing sparks. Electrical control signals are produced to open and close the valves. The control signals are delivered from a microrprocessor which is triggered during rotation of the drum by output signals from one or more initiators.

Abstract: An arrangement for the exchange of implements in foundry or mold casting hines, in which the implement is moved from a changing station towards an implement receiving and work station, and there connected with the implement holder.

Abstract: Uniform lengths of elastic tape are secured to a continuously advancing mrial web, for example, to make baby diapers. First an intermittently advancing tape is repeatedly gathered, for example, by laying tape sections into a depression of defined dimensions, to relieve the tape sections of any stretching. This assures tape sections of uniform length which are then stretched, cut and applied to the material web, for example, by an adhesive bonding. The apparatus used for performing these steps has several cooperating rollers of which the first has the depressions in its surface and is rotated intermittently while the second roller is rotated continuously. The spacings between neighboring tape sections bonded to the web preferably have a uniform length.

Abstract: An arrangement for the automatic control over the filling of a dosing or metering container with pourable or flowable material from a supply container, in a manner, such that a predetermined portion of the pourable material stored in the dosing container is withdrawn from the dosing container and a corresponding quantity of pourable material is automatically refilled into the container.

Abstract: A vehicular forage harvester has a trailer wagon pivotally connected ther with a chute operating to deliver an agricultural crop cut by the forage harvester into the trailer wagon. The chute includes a flexible section which enables the discharge end of the chute to be maintained in a position to deposit the crop into the trailer wagon when the wagon is pivotally moved relative to the forage vehicle.

Abstract: There is disclosed transport apparatus for transporting flexible sheet-like articles, especially envelopes. The apparatus comprises a transport cylinder, which is mounted on a shaft rotatably journalled in a frame and which comprises two cylindrical body portions. The body portions are each provided with axial suction ducts with outlet openings communicating with the circumferential surfaces of the body portions. The body portions are provided at their mutually remote ends with bores into which project bushes, which are mounted to the frame to be secure against rotation. A suction device is connected in a certain rotational position of the cylinder, through passages which are provided in the bushes and open at the circumferential surfaces of the bushes, with the suction ducts of the cylinder body portions. In another rotational position of the cylinder, the suction ducts of the body portions are ventilated by the bushes. The apparatus is capable of high operating speeds with minimum noise production.

Abstract: A foundry installation control device is disclosed for causing a rapid cut off of a molten metal flow at the time when a mold is full. Two detectors are provided, one of which collects information concerning the instantaneous rate of metal flow pouring from a ladle into a sprue cup while the other collects information on the level of the molten metal in the cup. An electronic circuit connected to the outputs of the two detectors produces a mold filling signal which undergoes a sharp fluctuation at the precise moment when filling is completed. This signal is compared with an instruction value and causes the generation of a flow cut-off signal which triggers the cessation of pouring by righting of the ladle in the case of a tilting ladle, closing of the stopper in the case of a bottom-pour ladle, or closing the discharge valve in the case of a pressure ladle.

Abstract: A casting plant comprises a pressure ladle and a small-capacity tilting ladle to regulate the filling of molds making up a casting line and successively moving to a position beneath the tilting ladle. The control system comprises two servo loops. One servo loop includes sensors acting upon a motor to control the angular position of the tilting ladle so that the level of metal in the pouring gate of the mold remains constant during the pouring operation. During this time, an optical sensor, an angular-position sensor, and a pressure sensor included in the other servo loop supply input data which are processed to supply a signal acting upon a valve in a gas line feeding the pressure ladle. This valve regulates the flow of molten metal from the pressure ladle to the tilting ladle so that the quantity of metal contained in the tilting ladle remains substantially constant.

Abstract: An apparatus for stacking and unstacking trays, especially adapted for use n connection with Mogul machines includes a base, a plurality of links and a generally vertically-disposed elevator frame pivotably mounted on the base by means of the links for reciprocal movement over an arcuate path between two laterally-displaced end positions. A gripper device for retaining and releasing trays is mounted on the elevator frame for longitudinally-displaceable movement relative thereto.

Abstract: A roll of controllable flexure having a cylindrical inner part and a tubular outer part surrounding the inner part and mounted rotatably at both its ends on the inner part. A heating strip is disposed along a generatrix on the inner part. At least one electrical temperature sensor is disposed in the inner part in the immediate vicinity of the heating strip and at least one additional electrical temperature sensor is disposed on the opposite side of the inner part. The two temperature sensors are connected to a temperature difference measuring apparatus and control an electrical regulating circuit to which a power circuit containing the heating strip is connected. The power delivered to the heating strip is so regulated that a preset temperature difference between the heated and unheated sides of the inner part is maintained. The different thermal elongation of the unheated and heated sides of the inner part produces an arching of the inner part which is transmitted to the outer part.

Abstract: A foundry installation control device is disclosed for causing a rapid cut off of a molten metal flow at the time when a mold is full. Two detectors are provided, one of which collects information concerning the instantaneous rate of metal flow pouring from a ladle into a sprue cup while the other collects information on the level of the molten metal in the cup. An electronic circuit connected to the outputs of the two detectors produces a mold filling signal which undergoes a sharp fluctuation at the precise moment when filling is completed. This signal is compared with an instruction value and causes the generation of a flow cut-off signal which triggers the cessation of pouring by righting of the ladle in the case of a tilting ladle, closing of the stopper in the case of a bottom-pour ladle, or closing the discharge valve in the case of a pressure ladle.

Abstract: In casting apparatus, a device is provided for the rapid exchange of a ladle to be tilted during the casting operation about a horizontal axis situated at its lip. In this device, a carriage can be run up and down on a stationary guide support which is curved about the aforementioned axis. The carriage has supporting arms which cooperate with hooking members disposed at the rear of the ladle in order to hold the ladle fast during tilting. After the empty ladle has been replaced on a dolly upon which it was moved into position, the supporting arms make it possible to move this ladle immediately away to the side and simultaneously to move a full ladle into a position where it is ready for lifting and tilting.

Abstract: Method and apparatus for automatically controlling the pouring of molten metal into a series of closed casting molds is disclosed. Molten metal flows in a stream from a lip-pour or bottom-pour casting ladle into a pouring gate at the top of a mold and partially fills the gate. Visible light or infrared radiation is emitted from the metal surface in the gate and is detected by a sensing device. The sensing device generates a signal which is a function of the radiation received, and therefore the apparent area of the surface of metal in the gate. The signal operates a ladle control mechanism to control the flow rate of the stream to keep the gate level substantially constant during pouring.

Abstract: An implement particularly for harvesting corn stalks including a pair of ight counter rotating conveying rollers which define therebetween a cutting station to which crop material is conveyed by stalk guides, with the conveying rollers having knives radially extending therefrom and blades located above the knives. A counter-knife cooperates with the knives to cut the crop material which is then engaged by the blades and propelled rearwardly to a plurality of feed rollers rotating about horizontal axes. The blades are formed with rearwardly curved leading edges and axially extending conveying members are provided on the conveying rollers above the blades. The blades and the knives are angularly arranged about the conveying rollers to be alternately passed through the cutting station during rotation of the conveying rollers.