Abstract: A spinning machine includes a yarn draw-off apparatus having a pair of rollers including a draw-off roller being continuously rotatable in a draw-off direction and a shiftable contact roller to be pressed against the draw-off roller for clamping a spun yarn in a gap between the rollers and transporting the yarn. A method and apparatus for drawing-off a yarn produced in the spinning machine include driving the contact roller at a predeterminable circumferential speed prior to beginning drawing-off yarn while the gap between the rollers is open, before pressing the contact roller against the draw-off roller for drawing-off the yarn and closing the gap between the rollers.

Abstract: In the case of an arrangement for the filling of a magazine of a movable package spool changing arrangement with tubes, at least one intermediate magazine is provided to which the magazine of the package spool changing arrangement can be applied and at which a continuous transport device passes by from which individual tubes can be removed and can be filled into the intermediate magazine.

Abstract: For a spinning machine, an arrangement is provided for the conveying of finished packages which, following an end of the spinning machine, comprises a transfer point for receiving a number of packages arranged behind one another in a row, which is followed by a stationary intermediate storage device for a plurality of rows of packages to which a removal device for the packages is assigned.

Abstract: An apparatus for changing yarn carriers in a textile machine, particularly a ring spinning machine, funnel spinning machine or ring twisting machine, includes a revolver having an axis, a pair of spindles being disposed on the revolver symmetrically to the revolver axis and having axes, and the spindles of the pair being rotatable in mutual alternation between a spinning position and an unwinding or disposal position. According to one embodiment, the axes of the spindles of the pair are inclined relative to the revolver axis by an acute angle and diverge in a direction toward the free ends of the spindles. According to another embodiment, at least two pairs of spindles are disposed on the revolver for serving at least two adjacent spinning or twisting stations of the textile machine, and each two adjacent spindle axes are mutually parallel at a given spacing.

Abstract: A rigid fuel manifold system for use in a gas turbine engine which is resistant to vibrations from operation of the engine. The system comprises two fuel feed manifolds, a fuel drain manifold and support brackets which attach these manifolds to one another and provide a structure with a high natural frequency above the 1/rev of the engine operating range. Structural support brackets that permit easy assembly and low installation stress are also provided.

Abstract: Method and apparatus for diagnosing ignition failure conditions in a combustion turbine are shown to generally include referencing members for generating a plurality of reference signals, wherein each of the reference signals are representative of a desired ignition operating condition, sensors for sensing actual ignition operating conditions each of which correspond to a desired ignition operating condition. The sensors generate a plurality of operating signals representative of actual ignition operating conditions. Comparators are utilized for comparing each of the operating signals to a corresponding reference signal and to indicate when the operating signal exceeds the reference signal in the presence of an ignition enabling signal.

Abstract: First and second air-fuel ratio sensors are disposed upstream and downstream of a catalytic converter respectively, and these sensors provide detection signals used to set first and second air-fuel ratio correction quantities, respectively, whereby an averaged air-fuel ratio corection quantity is calculated. During a steady operation in which a change in the averaged air-fuel correction quantity is below a predetermined value, a final air-fuel ratio correction quantity is calculated according to the first and second air-fuel ratio correction quantities. During a transient operation in which a change in the averaged first air-fuel ratio correction quantity exceeds the predetermined value, the second air-fuel ratio correction quantity is fixed from when the change exceeds the predetermined value until a predetermined time has elapsed after the change drops below the predetermined value.

Abstract: This invention relates to a method of controlling the air-fuel ratio of an internal combustion engine having a main 0.sub.2 sensor and a subsidiary O.sub.2 sensor provided upstream and downstream, respectively, of a catalyst converter for detecting the oxygen concentration of the exhaust gas of the engine. The method comprises: feedback-controlling the air-fuel ratio of a mixture gas to be supplied to the engine to about a stoichiometric air-fuel ratio having the highest purification efficiency of the exhaust gas by adjusting the amount of fuel to be supplied by an injector in accordance with the output signal from the main O.sub.2 sensor; and also feedback-controlling more precisely the air-fuel ratio of the mixture gas to about the stoichiometric air-fuel ratio by adjusting the amount of fuel supply in accordance with the output signal of the subsidiary O.sub.2 sensor. The feedback control value set for adjusting the amount of fuel supply in accordance with the output signal of the subsidiary O.sub.

Abstract: There is disclosed a thin torque converter, fluid coupling device mounted on a vehicle. The converter which has a smaller axial dimension than the prior art converter, comprises an outer race, an inner race, a number of sprags mounted between the races, and two thrust washers. The races and the sprags are held between the washers. The sprags are wider than the inner surface of the outer race, but narrower than the outer surface of the outer race. The washers have radial outward portions bent along the side end surfaces of the outer race. Snap rings anchored to the boss of the stator of the converter prevent the washers from coming off.

Abstract: A continuously active pressure accumulator power transfer system for a vehicle or a like comprises an engine, a pump driven by the engine, a main pressure accumulator maintained at a substantially constant fluid pressure and fluid volume by the pump during operation, a fluid motor for propelling the vehicle which is supplied with driving fluid pressure from the pressure accumulator and auxiliary units for operating the vehicle. The auxiliary units are also operated by fluid pressure from the pressure accumulator. The fluid motor(s) and the auxiliary units are operated directly by fluid pressure from the accumulator without any direct connection with the engine.

Abstract: In accordance with the present invention, a fuel flow circuit comprises a source of fluid, a first means for pressurizing the combustible fluid and pumping the pressurized fluid along a first path leading to a combustion apparatus for an internal combustion engine. The first means for pressurizing further pumping the combustible fluid along a second path to a first fluid-driven actuator adaptable to control some aspect of the engine. The first means for pressurizing further pumping the combustible fluid along a third path to a second means for pressurizing the combustible fluid. The second means for pressurizing pumping the combustible fluid along a fourth path, including a first diverting means, to a second fluid-driven actuator adapted to control some aspect of the engine or exhaust nozzle.

Abstract: A flow control valve has a first variable restrictor to control a flow rate of a hydraulic fluid supplied from a hydraulic fluid supply line to a hydraulic actuator and a second variable restrictor to control a flow rate of the hydraulic fluid discharged from the hydraulic actuator to a hydraulic fluid return line. A pressure compensating valve holds constant a differential pressure across the first variable restrictor, and a recovery circuit having a recovery line has a check valve that allows flow of the hydraulic fluid only toward the supply line. The recovery circuit receives at least part of the hydraulic fluid discharged from the hydraulic actuator and returns it to the supply line at a portion between the pressure compensating valve and the first variable restrictor through the recovery line upon controlling of the discharged flow rate by the second variable restrictor to thereby recover the discharged hydraulic fluid.

Abstract: A thermally insulated engine (1) includes a combustion chamber which has principal portions made of a thermally insulating material and a turbocharger (2) which has a compressor coupled to a turbine (21) for supercharging the engine (1). The thermally insulated engine comprises an electric motor (3) mounted on a rotatable shaft (22) of the turbine, a detecting unit (13, 14) for detecting an operating condition of the engine, an oxygenating mechanism (6) having an oxygenating film, a compressor mounted on the rotatable shaft (22) of the turbine for delivering oxygenated air from the oxygenating mechanism (6) to the engine, and a control unit (5) for controlling the electric motor to assist in operating the compressor and controlling the amount of oxygenated air depending on the operating condition of the engine as detected by the detecting unit. When the engine is accelerated, for example, the concentration of oxygen in the intake air is increased for suppressing NOx and soot in exhaust gases.

Abstract: An internal combustion engine with a dual turbocharger system includes an engine, a first turbocharger and a second turbocharger arranged in parallel with each other, an intake switching valve located downstream of a compressor of the second turbocharger, and an exhaust switching valve located downstream of a turbine of the second turbocharger. At large intake air quantities, both turbochargers are operated, while at small to medium intake air quantities only the first turbocharger is operated. At "one-turbocharger-operation", when the engine load is low, the intake switching valve is opened, while the exhaust switching valve is maintained closed. Thus, at small to medium intake air quantities and low engine loads, the intake flow can be introduced through both the compressor of the first turbocharger and the compressor of the second turbocharger. As a result, flow resistance is decreased and acceleration response from low engine loads is improved.

Abstract: The invention consists of improvements in disposable and reuseable sorption temperature changers which eliminate the necessity of using valves which perforate the walls of the device. This facilitates the preservation of a long term leak proof air vacuum in the device, and reduces the cost of the device. Water in an air evacuated chamber boils at low temperature and cools its surroundings. The vapor generated by the low boiling point liquid is removed by sorption by a desiccant placed in a separate chamber. The sorbed vapor heats the desiccant and it surroundings. The temperature changing potential of the device can be preserved indefinitely by a barrier which prevents a communication between the liquid and desiccant chambers. The temperature changer is activated by a pliable or flexible surface portion which punctures or dislocates the barrier between the chambers.

Abstract: A system for drying and ventilating jet fuel tanks for reducing the fuel fume level from residual fuel in an emptied fuel tank operates in four modes. In a recirculation mode, a blower recirculates air through the tank in a closed loop. The blower suctions air from the tank and forces it through a vapor recovery unit having a cooling section with a refrigeration coil causing condensation of fuel vapor and a reheater section which reheats the air entering the tank to enhance evaporation of residual fuel. A heat recovery system circulates glycol/water mixture through a first heat recovery coil in the cooling section for absorbing heat from the air and a second heat recovery coil in the reheater section for returning the heat to the air. After fuel vapor has dried from the walls of the tanks, the system operates in a vacuum mode in which a vacuum hose, obtaining negative pressure through a pipe from the suction side of the blower, is used to remove residual puddles of fuel from the tank.

Abstract: The present invention is intended to provide a slush hydrogen production apparatus adapted to efficiently produce slush hydrogen having even particle diameters by means of an industrial procedure. A liquid hydrogen supply/discharge passage (2) is connected to the lower portion of the insulated closed container (1), an exhaust passage (4) and a helium gas supply passage (5) are connected to the upper portion of the insulated closed container (1), a heat exchanger (7) and a vacuum pump (9) are arranged in the exhaust passage (4) in that order from the side of the insulated closed container (1), a stirring means (16) is disposed within the insulated closed container (1) and the stirring means (16) is adapted to be driven from an outside of the insulated closed container (1).

Abstract: Improving the connective heat transfer of a tunnel type cryogenic freezer by positioning the circulating fan blades upside down and closer to the articles moving through the tunnel.

Abstract: Rapid cooling or freezing of foodstuffs, perishables or blood products is accomplished by using a thin film membrane to totally envelope the foodstuffs or blood product only during the heat extraction period. This thin film encapsulation system closes around the item and is held tightly to the item by atmospheric and/or hydrostatic pressure. Once the item is encapsulated, low temperature heat transfer fluids are then circulated on the exterior surface of the membrane, thus extracting the heat within the item through the thickness of the membrane. Upon completion of the necessary chilling or freezing, the atmospheric and/or hydrostatic pressure is withdrawn and the chilled or frozen item is extracted.

Abstract: A method of operating a compartmentalized transport refrigeration system having first, second and third compartments respectively served by a host refrigeration unit and first and second remote refrigeration units. The method includes the steps of providing a first signal when either of the first and second remote refrigeration units is in a cooling cycle, cycling the host refrigeration unit between cooling and heating cycles to hold a selected set point temperature of a fresh load in the first compartment, in the absence of the first signal, and providing a predetermined null period between the heating and cooling cycles of the host unit when the first signal is present. In a preferred embodiment a prime mover for a refrigerant compressor is operable at a selected one of high and low speeds, with the method including the step of preventing high speed operation when any remote refrigeration unit is in a heating cycle.

Abstract: An assembly, especially for a beverage-vending machine with a container for the storing, cooling and carbonating of water including two measuring electrodes arranged in the container at differing horizontal and vertical distances from an electrically conductive inner wall of the container connected to ground, one of these in the area of the ice layer under formation. The measuring electrodes obtain resistance values for the ice and/or water that arise between the electrode and the inner wall of the container. In order to cool the water independently from its physical-chemical composition, potentials corresponding to the resistances are derived and are supplied to a differential amplifier. Depending on a size comparison of the two resistance values, a cooling apparatus that affects the contents of the container is switched on or off.

Abstract: A cooling apparatus includes a bypass provided to a path extending from a compressor to an expansion valve via a condenser, and a unit for controlling a ratio of a flow rate of a refrigerant of the path via the condenser to that of the bypass path, or a unit for varying an air volume of a fan of an outdoor unit for blowing the condenser so as to vary a capacity of the condenser. The degree of superheat of the refrigerant is measured at an exit of the evaporator, and an expansion valve is controlled in accordance with the measured degree of superheat.

Abstract: A refrigerating system including a refrigerant circuit having a condenser, evaporator and wobble plate type compressor with a variable displacement mechanism. Two passages communicate between the crank chamber and the suction chamber in the cylinder block. A bellows is disposed in a first passage and controls the communication between the crank chamber and the suction chamber response to crank chamber pressure. A control valve is disposed in the second passage and controls communication between the crank chamber and the suction chamber in the second passage in response to a signal generated outside of the compressor. A control circuit controls the generation of the signal in response to thermodynamic characteristics related to the evaporator. The signal activates or deactivates the second control valve when the characteristic indicates a value beyond a predetermined range of values.

Abstract: A refrigerated railcar having a bunker for holding CO.sub.2 snow generated by a spray manifold temporarily hooked up to a supply of liquid CO.sub.2, the bunker allowing the gaseous CO.sub.2 sublimated from the formed snow to pass down through vents and into an improved underfloor flow channeled floor which provides a maze-like structure to cool an underside of the cargo. Additionally, an improved insulated manifold pipe hanger is described. Additionally, an improvement in the venting arrangement of the bunker area and an improved configuration of the manifold orifices to provide a more evenly deposited snow thickness throughout the bunker during charging is described.

Abstract: Cooling device for installation in motor vehicles with a refrigeration unit and a cooling space in operative connection with it for receiving a product to be cooled. The refrigeration unit is in operative connection with a receiving chamber, which just like the refrigeration unit itself, is designed for permanent installation in the motor vehicle. The cooling space is provided in a transportable cold storage box which can be put into the receiving chamber and taken out of the receiving chamber as desired and which is in detachable connection with the refrigeration unit when it is in the receiving chamber.

Abstract: A food preparation table includes a cabinet with a food preparation surface and a heat-insulated food storage compartment. An evaporator and a fan are disposed inside the cabinet so that air moves through the evaporator upon operation of the fan. In one embodiment, a temperature controller operates the evaporator fan only during operation of the refrigeration equipment in the cooling mode. A condiment plenum is disposed adjacent to the preparation surface and includes at least one condiment plenum wall that defines a complex structure. At least one open top condiment pan is received by the condiment plenum. A cool air supply system, which can include an auxiliary fan, one or more baffles, and air flow dams and guides, efficiently distributes cool air from a localized site, to widely dispersed locations, some of which being inside the storage compartment and some of which being exposed to the ambient atmosphere.

Abstract: A refrigerant recovery system is operative in a recovery mode to recover refrigerant from an air conditioning circuit, and in a cleaning mode to cleanse the recovered refrigerant of impurities therein. In the recovery mode the refrigerant is withdrawn from the air conditioning circuit and flowed through a filter dryer by a compressor which then forces the refrigerant through a condenser into a storage container. In the cleaning mode, liquid refrigerant from within the storage container is continuously flowed through the filter dryer and then back into the storage container. To remove impurities from within the air conditioning circuit, the recovery system is also operative in a closed loop flushing mode in which liquid refrigerant from within the storage container is continuously pumped through a portion of the air conditioning circuit, filtered, and then returned to the storage container without any appreciable quantity of refrigerant being vented to atmosphere during the flushing process.

Abstract: A single pass refrigerant recovery device recovers refrigerant from a refrigeration system. The device includes at least one hose for withdrawing refrigerant from the refrigeration system and a first oil separator disposed downstream of the refrigerant hose. A filter is disposed downstream from the oil separator and a compressor is disposed downstream from the filter. A second oil separator is disposed downstream from the compressor, and the condensor is disposed downstream from the second oil separator. A moisture indicator is disposed downstream from the condensor, and a storage tank is disposed downstream from the moisture indicator. The refrigerant recovery device also contains an inventive oil separator/filter device that includes a canister having a first chamber portion for separating oil from the refrigerant and a second chamber portion for filtering refrigerant.

Abstract: A portable, evaporative air cooler ideal for off-road utility vehicles such as bulldozers, earth working equipment and the like. A corrosion-resistant, plastic housing comprises a rigid rectangular base and a rigid mating cover. The cover defines an air inlet, a fan intake plenum, and an air output. A fan mounted on the cover draws ambient air into the housing and outputs cooled, humidified air through an adjustable, louvered air distributor head adjustably positioned by the user. The distributor head may be coupled directly to the air output, or it may be remotely positioned with a flexible hose. The base defines a reservoir subdivided into an air admission compartment, an adjacent wick compartment, and a terminal filter compartment. Water within the reservoir partially fills all three compartments. The air admission compartment is covered by a prefilter grate that prescreens incoming particulate matter. The wick compartment seats a corrugated, absorbent wick having a plurality of air passageways.

Abstract: Method and apparatus for quick freezing particles with surface moisture by immersion in liquid cryogen to produce a frozen crust or layer on the particles followed by agitation in content with the vaporized cryogen to complete freezing and prevent clumping of the particles.

Abstract: A chill water system combining a storage vessel 10, a multiplicity of ice encapsulating units 11 contained in the vessel and a chiller system 60. The vessel contains a volume of glycol and water solution having a freezing point about twenty six degrees F. The ice encapsulating units 11 comprise sealed containers filled with deionized water and having a volume 131 of powdered cholesterol therein to serve as an ice nucleating agent to lower the initial ice formation temperature of the unit. The containers have imperfect geometric deformable wall structures to permit an increase in enclosed volume as said water therein freezes. Chiller system 60 is operatively associated with the vessel and cools the glycol and water solution to about twenty six degrees to freeze the water in the containers 11. A topping tank 90 and an inventory tank 93 receive liquid from the storage vessel 10 as the ice encapsulating units 11 freeze and expand in volume.

Abstract: A cryogenic storage system affords dense packing and easy access to individually identified storage packets of frozen fluid, such as blood, by storing the storage packets in an array of individually identified vertically movable racks, each containing a stack of individually identified storage packets, within a grid beneath the opening of a cryogenic tank. Preferably, the storage packets are substantially flat and the racks hold the storage packets in vertical edge-to-edge relationship.

Abstract: An improved centrifugal refrigeration system having an elongated rotatably supported shaft with means to rotate the shaft, a condenser unit affixed to and rotated with the shaft, the condenser unit having a tubular member coiled about the shaft in a path beginning at a condenser unit inlet point at a first radius from the shaft and increasing as it is coiled about the shaft to an outlet point at a greater radius, an evaporator unit affixed to and rotated by the shaft and being spaced from the condenser unit, the evaporator unit having a tubular member coiled about the shaft in a path beginning with an inlet point adjacent the shaft and an outlet point at a second radius from the shaft, the second radius of the evaporator unit outlet point being less than or at least not substantially greater than the first radius of the condenser inlet point, a refrigeration return line connecting the evaporator outlet point to the condenser outlet point, a refrigerant delivery tube connecting the condenser outlet point to th

Abstract: The invention relates to a method for treating waste comprising the steps of:i) shredding the waste;ii) separating liquid;iii) subjecting the separated solid waste to a cold treatment; andiv) separating product remnants,and to a device for treating waste, comprising:i) a shredder unit;ii) a unit for separating liquid out of the shredded material;iii) a cold treatment unit for the shredded material; andiv) a unit for separating product remnants.

Abstract: A process and installation for producing cooled air and water or energy and water from hot damp air. In the former embodiment, the hot damp air is first compressed. Then, the compressed air is at least partially dehumidified and cooled. The dehumidified, cooled, compressed air is thereafter expanded. In the latter embodiment, the hot damp air is first expanded. The expanded air is thereafter compressed. In addition to the above, the invention also has utility in desalinating salt water.

Abstract: An improved warp knit having colored surfaces comprised of three or more colors can be made across the same wales. Threads having a color which is covered in one colored surface run as floats, and threads with a color forming the colored surface are placed in a pattern connecting the floats with one another. A fabric or twill pattern extends across at least a number of wales which is less by 1 than the number of colors. Accordingly adjacent floats consist of at least two differently colored threads.

Abstract: To produce pattern work and plain jersey, and comprising sets of selection levers for controlling needles which are to be lifted to a higher loop-clearing height and to a lower loop-retaining height, interacting with oscillating selectors, the machine comprises in combination: symmetrical lifting cams (20, 32); symmetrical lowering cams (441; 442; 443; 444) and corresponding counter cams (461; 462; 463; 464) defining two adjacent zones of maximum lowering; pushing cams (490) arranged between these two zones, to exclude the butts of the needles from the action of the secon zone of maximum lowering; symmetrically arranged pushing realignment cams (501A, 501B; 502A, 502B; 503A, 503B; 504A, 504B and 511A, 511B; 512A, 512B; 513A, 513B; 514A, 514B), to prepare all the butts in a row of butts of selectors for selection; partial-lowering cams (20C) to predispose for selection; and cams (701; 703) for the partial re-lifting of selectors of unlifted needles, and for their realignment with the selectors of needles previ

Abstract: An apparatus and method are provided for generating a foam from a preheated dye solution and subsequently applying the foam to continuous strands of yarn wherein the foam is driven by a pressure differential. The apparatus has a foaming pan for producing the foam from the dye solution and a gas. The pan opens into a foam transmission chamber at or near ambient pressure which fluid communicates with an evacuated spent foam discharge chamber across an open interface. The yarn is dyed by conveying it through the open interface and contacting it with the foam which is drawn across the open interface in a flow path perpendicular to the yarn by the pressure differential between the foam transmission and discharge chambers.

Abstract: An antitheft device for attachment to a steering wheel of an automobile comprising a trough member defining a trough with an open top for engaging from under a section of the steering wheel, a handle secured to a shaft and rotatable between a locking position with the handle extending radially outwardly across the open top of the trough and an unlocking position with the handle removed from the trough and a lock mechanism associated with the trough member to lock the handle in the locking position.

Abstract: A system for the central locking of several closure points of an automotive vehicle with a remotely controlled setting member at each closure point has a central control circuit, as well as activating switches. Each switch has a neutral central position between "closed" and "open" positions at one or more closure points, by which the control circuit can be controlled for movement of all setting members in the same direction. A switch sequence of the invention provides for individual opening of a closure point by a process wherein the actuating switch must be brought into the "closed" position and then immediately into the "open" position.

Abstract: A small re-combinate lock for equipment and furniture such as desks and cabinets. The lock is comprised of a generally cylindrical shell and a removable plug rotatably mounted inside of the shell. The plug has a core and a plurality of multi-piece tumblers slideably mounted in the core. Each tumbler is an assembly comprised of a wafer holder and a combining wafer removably mounted at an end portion of the wafer holder. A wafer support ring is mounted on the core adjacent to one side of each tumbler and a rotatable wafer carrier is mounted on the core adjacent to the opposite side of the tumbler. The wafer support ring is keyed to the core and the wafer carrier is rotatable on the core. In each wafer carrier there are a plurality of coded wafers which can be exchanged with the combinating wafer of an adjacent tumbler. To re-combinate the lock, the plug is first removed from the shell with a master key.

Abstract: An improved disc-type key holder includes a circular disc with an annular sliding groove on its peripheral surface, and a multiplicity of key retaining rings slidably suspended in the groove. The disc is formed of two halves each having in the center of the disc surface a boss portion with a recess on the outside and a convexity on the inside and which are opposedly joined together to form a wheel-type body. On the disc surface of one of the two halves is provided a guide slit cutting and extending along the surface from a point on the peripheral wall toward the center to terminate in an enlarged end opening provided on the peripheral surface of the boss portion.

Abstract: A crimping machine is disclosed for making a crimp connection of an electrical connector with an electrical conductor. A fixed tool receives the connector with crimpable prongs in a position for receiving the electrical conductor therebetween. A movable tool crimps the prongs against the conductor by a reciprocating stroke and a strain gage senses the force transmitted between the tools. A control device responds to a predetermined value of force for terminating the crimping stroke and measuring means measures the length of the crimping stroke. Indicating means indicates when the length of the stroke of the movable tool deviates from a predetermined stroke length as an indication of a defective crimp connection.

Abstract: A component (22; 23; 122) is positioned on or formed as part of a plate (20) which is supported by a bearing (14) and which is supported at the position of the component (22; 23; 122) to be positioned by a support (8). The positioning is carried out by a die (10) which together with the support is controlled by a control system, comprising one or more reference signal sources, comparators (24, 30) and amplifiers (25, 31) , in such a way that the component (22; 23; 122) is accurately positioned relative to reference plane (26) relative to the plate. When the desired position of the component is reached, it is ensured that no elastic deformation are present in the plate.

Abstract: A hydroelastic deep-drawing device for use in presses for drawing a shaped sheet-metal workpiece and a control system for the device are disclosed. The device includes a ram which is movable through a first displacement point "a" and a sheet-holding plate is supported by the spacer pins and is movable downwardly with the ram through a second displacement point"b", a starting point "s" for pre-operating displacement, and a synchronous point "c". The control system includes a control device for generating a starting signal for a working cycle when the ram reaches the first displacement position "a", for accelerating the sheet-holding plate after the sheet-holding plate reaches the second displacement position "b", and for constantly comparing the velocity of the sheet-holding plate to that of the ram and for regulating the velocity of the sheet-holding plate so that, when the third displacement point "c" is reached, the velocity of the sheet-holding plate equals the velocity of the ram.

Abstract: In an upsetting press for reducing the width of rolling stock, particularly the slab width in hot-rolled wide strip roughing mills with tool carriers, which are disposed on either side of the slab edge, accommodate pressing tools and can be moved in the direction of reducing the slab with the help of a steering system, which is operated with the help of at least one crank gear, the connecting rod head of the crank gear is movably supported in an appropriately shaped pressure pan of the tool support and the connecting rod head has a sliding band with hydrostatic pressure lubrication, which corresponds at least to the length of the contact of the pressure pan, so that the highly loaded sliding surfaces between the connecting rod head and the pressure pan are adequately lubricated with grease, even if they move only slightly relative to one another.

Abstract: Drawn bores similar to a sleeve and provided with an inner thread are used as a substitute for nuts. The starting materials are flat sheet-metal blanks. In the course of step-by-step deformation with shaping tools, the wall thickness of the drawn bores decreases, compared to the starting material. This is true in particular with increased height of the drawn bores and sheet-metal blanks with larger surfaces. Accordingly, the invention is intended to recite a method according to which it becomes possible to produce high drawn bores, having a wall thickness comparable to the thickness of the original material, from sheet-metal blanks with large surfaces for highly stressed screw connections. This object is attained by means of a changed sequence of the step-by-step operation. Flat pressing of the sheet-metal piece is only performed after partial inward crimping has been started.

Abstract: A method for molding a stainless steel sheet into a complex airfoil-shaped cover for the leading edge of a jet engine blade wherein the sheet is positioned between a male and female mold having an airfoil-shaped protrusion and recess, respectively, on either side of which are disposed a plurality of pairs of complementary tongue and grooves of shorter length than that of the recess and protrusion. After the sheet is removed from between the molds the portion formed between the recess and protrusion is trimmed to the shape of the cover.

Abstract: A wall ironing ring (8, 11, 14) for use in cooperation with a punch (1) to reduce the thickness of a sidewall of a cup (17) drawn from a laminate of a polyester film and sheet aluminum or sheet aluminum alloy has a frusto conical entry surface (24) to the ring which converges at an angle between 1.degree. and 4.degree. to a central axis perpendicular to the plane of the ring and terminates at a land of short length, measured at said axis; and divergent exit surface extends from said land at an angle in the range from 5.degree. to 15.degree.. The ironing ring may be made from a material having a thermal conductivity greater than 50 W/m.degree.C. used in cooperation with a like ring of smaller land diameter held apart from the first ring by a spacer (7) in which coolant is applied to the cup.

Abstract: A crimping tool comprises a pair of handles, crimping jaws, dies, and/or die nests, positioned at one end of the handles and in alignment with each other to receive a connector therebetween, a linkage extending between the handles and joining same together such that one handle pivots relative to the other and forces the jaws, dies, and/or die nests toward each other. A spring is positioned between the handles to facilitate the opening movement of the tool. The spring in the present invention is configured with a fracture zone, and is positioned in such a location that the spring is flexed during each cycle of operation. The fracture zone may include one or more coils, and such coils break, after a predetermined number of cycles, to affirmatively indicate to the user that the tool requires inspection and/or servicing. When the spring breaks, the tool may still be manually opened, but only with some difficulty, so that the operator cannot ignore the need for inspection and/or servicing.