Abstract: A fixing mechanism of stair units which are used for assembling a curved stair. Each stair unit has an upwardly projecting cylindrical member and a downwardly projecting cylindrical member at opposite ends. The upwardly projecting cylindrical member of the lower stair unit is inserted into the downwardly projecting member of the upper stair unit rotatably and slidably in the vertical direction. These two cylindrical members are fixed to each other by a screw member disposed on the axis of the upwardly projecting cylindrical member and a pair of nut members, which are engaged with the screw member with clamping an anchor member fixed to the downwardly projecting cylindrical member.

Abstract: A grain bin floor support system is disclosed that uses short posts, each formed by appropriately bending a piece of sheet metal into a V-shape such that the legs of the post diverge from one another and can be gripped and resiliently bent toward one another as by hand. Notches, which are cut into the top edge of the diverging legs of the post are aligned and of such a width that the outer channel of a floor panel can be gripped and accommodated in a binding fit in the two notches. A plurality of these posts are attached to the floor panel and a series of these panel and post assemblies forms a grain bin floor.

Abstract: A metallic sheath for a posttensioning method wherein an outer peripheral surface or outer and inner peripheral surfaces thereof is (or are) coated with phosphate layer (or layers) and plastic resin layer (or layers) thereupon and preferably further coated with a solid lubricating layer upon the inner peripheral surface of the sheath.The phosphate layer of the outer peripheral surface protect the metallic sheath from corrosion by negative ion within concrete, while, on the other hand, that of the inner peripheral surface prevents the electrochemical corrosion between the inner peripheral surface of the sheath and tendon.Moreover, if a solid lubricating, layer is provided at the inner peripheral surface of the sheath, the sliding friction between the metallic sheath and tendon can be decreased so that prestressed force can be increased as much.

Abstract: In a parapet portion of a curtain wall, indoor side and outdoor side members of each panel unit mounted at the top of the curtain wall are connected via a connector made of heat-insulating material, and a damp-proofing sheet is mounted so as to extend between the indoor side member and a building body to form a heat-insulating damp-proofing layer, whereby the disadvantages that heat received by a coping from the external atmosphere would be transmitted to the indoor side of the curtain wall, resulting in deterioration of the heat-insulating property of the curtain wall, and that damp enclosed between the curtain wall and the building body would dew the inner surface of the coping, can be improved.

Abstract: The invention concerns the provision of structural elements for building facades and the like, which are provided for fire protection according, for example, to German Industrial Standard requirements. Accordingly, measures should be provided for self-supporting fire protection elements which prevent the spreading of fire, for example, from floor to floor, regardless of whether the fire comes from the outside or the inside. This object is achieved in that the composite connecting body (4) consists of at least one statically loadable bearing body having an aluminum core (18) which is completely or partially surrounded by fire suppressant material (9). This fire suppressant material (9) can be provided with or without a covering (10).

Abstract: A curvilinear structural insulating panel that is comprised of a plurality of slotted beam members that are deformed to a preselected radius or radii of curvature, end beam members that connect to the slotted beam members at their ends and flexible sheets that connect to the beam members and provide a hollow, air filled panel, and a method for making the same.

Abstract: A structural system including a panel having a pair of parallel planar outer walls, reinforcing ribs joining the outer walls with reinforced shoulders at the intersection of the ribs with the walls, and a panel connecting member for joining the panel to an adjacent panel by slidably engaging an interlocking panel joining member. The panel connecting member includes a head portion and a neck portion which form a pair of opposed keyways and permits interlocking with the interlocking lips of variously configured panel joining members. A variety of interlocking panel joining members allow assembly of the structural panels in end-to-end configurations, T-intersections, cross-intersections and other configurations to form structural systems. Also disclosed are interlocking end trim members, bolted interlock members and edge insert members which may be used to assemble a complete structure.

Abstract: An insulation blanket for the roof of a metal building installed between the roof purlins and roof paneling includes a concealed safety reinforcement of tapes or netting between the insulating material of the blanket and the interior facing thereof. The arrangement enables the reinforced insulation blanket to support the weight of a workman who inadvertently steps on it while installing a roof.

Abstract: An insulating building block made up of an insulating core and two concrete walls, each cast over one side of the core. The latter comprises a body having opposed parallel flat outer faces, bound by parallel longitudinal edges and parallel side edges, and having a transverse plane normal to the outer faces centrally between the longitudinal edges. Locking protrusions are formed integrally with the body and project from the outer faces. Each protrusion extends from either side of the transverse plane toward the longitudinal edges and terminates short of the longitudinal edges. The protrusions have outer surfaces and lateral edges tapering inwardly between the outer surfaces and the body outer faces. The protrusion side edges further make angles with the transverse plane suitable to facilitate demolding of the core when the core is molded in two half molds having a closure plane co-planar with the transverse plane, aforesaid.

Abstract: An insulating building block made up of an insulating core and two concrete walls is configured such that the core comprises locking protrusions to interlock with preformed cavities in the concrete walls.

Abstract: A vent assembly for electrical equipment comprising a panel for covering the equipment in which the panel has at least one elongated slot extending therethrough, a front side, and a rear side. A box member is secured to the rear side of the panel over the slot with the box member having a first elongated plate extending outwardly from the rear side of the panel on one side of the slot and an elongated second plate extending from an outer end of the first plate over the slot at an angle to the first plate. The second plate has an outer edge. An elongated flange extends from the rear side of the panel on the other side of the slot at an angle to the panel which is generally directed toward the box member. The flange has an outer edge and is of sufficient width to intersect a straight line taken from the side of the slot nearest the box member to the outer edge of the second plate.

Abstract: Wall boardings having a series of wainscoting elements mounted in parallel and undercut at all edges. Strip-shaped lining mouldings are disposed both at the ends and between the wainscoting elements. The mouldings are overlapped along an adjacent undercut side edge of the wainscoting elements.

Abstract: The invention relates to a tetrahedral beam that can be compactly stowed, sequentially deployed, and widely manipulated to provide a structurally sound yet highly maneuverable truss structure. The present beam is comprised of a plurality of repeating units comprised of tandem tetrahedra sharing common sides. Tetrahedra are comprised of fixed length battens 12 joined by joint 14 into equilateral triangles called batten frames. Apexes of adjacent triangles are interconnected by longerons 16 having mid-point folding hinges 20. Joints 14 are comprised of gussets 24,34 pivotably connected by links 25. Joints 14 permit two independent degrees of rotational freedom between joined adjacent batten frames, and provide a stable structure throughout all stages of beam deployment, from packaged configuration to complete deployment. The longerons and joints can be actuated in any sequence, independently of one another. The present beam is well suited to remote actuation.

Abstract: A deformable sleeve for centering a roof panel mounting tab on a roof panel attachment clip unit prior to installation of the clip unit and the roof panels on a building. The centering sleeve has an elongated body with two sides, one edge of each side being connected together by hinge structure, and the opposite edge of each side having a mounting facilitating flange extending therealong. In order to increase the deformability of the sleeve, cutouts are provided in at least one edge of each side, and preferably in both edges of each side. These cutouts may be of various shapes including semi-elliptical, V-shaped, rectangular shaped, or square shaped. A modification of the mounting facilitating flange includes a thickened portion extending along the non-hinged edge of each sleeve side to facilitate the mounting of the sleeve on a support piece of the roof panel attachment clip unit.

Abstract: Method is disclosed for construction of foldable constructed concrete slab buildings, in which method wall slabs for each floor level of the proposed building, are cast on site in horizontal layers, and groups of wall slabs are cast in stacks, with hinged edges of the wall slabs arranged according to the plan of the walls in the proposed building, and modular sections of ceiling slabs are cast near by in continuous array, and access slots are cast thru said ceiling slabs, and said access slots are arranged according to locations of the walls in the proposed building, and a lifting apparatus lifts a section of a ceiling slab and places it on top of a related group of wall slabs, and a connection device is inserted downward thru each of the access slots to engage the hinge edge of a wall, and said device being of the type that permits the hinge edge of the wall slab to rotate freely under the underside of the ceiling slab, and the ceiling slab is lifted, and the walls depend downward to a vertical position form

Abstract: A unitary fastener insert (50) for structural sandwich panels (52) is comprised of a shaft (58) of a generally uniform circular cross section having a base (64) and a tip (62), a generally circular flange (68) extending radially outward from the base circumferentially peripheral the shaft, and a central stepped bore therethrough (72) including an enlarged fastener seat recess (78) disposed interiorly of the tip for receiving the head (90) of a fastener (54) merging to a reduced bore (82) for receiving the shank (94) of the fastener. The insert of the present invention is specifically configured for production by a forging technique, also described herein.

Abstract: A token, such as a coin for making change in a cigarette package dispensing machine, is inserted into a "hard pack" or box of the type having a hinged lid by placing the token on the front face of the box, pressing down on the front face to form a slit-like opening under the edge of the lid, and then shoving the token under the lid through the opening. One or more recesses can be formed in a box insert under the lid to accept the token or tokens. An apparatus for accomplishing this is disclosed.

Abstract: A wrapping apparatus comprises a film roll placed on a pair of support rollers, a film withdrawal port to introduce the film on the roll exterior, a severing tool to cut the film introduced through the port, a film length determiner to detect the leading end of the film partly thrown around product so as to calculate the successive length of the film required, a film length detector which detects the length of the film withdrawn as calculated by the determiner, and a brake assembly which is applied to the support roller to stop withdrawal of the film on the basis of signals generated from the detector. The amount of film on the roll that is withdrawn corresponds to the dimensions of the product to be wrapped.

Abstract: A butter-like product is recirculated from a mixing bowl (10) by a recirculating pump (14) until its viscosity is adjusted to the equivalent of 16,000 to 18,000 centipoise at 75.degree. F. The viscosity adjusted butter is pumped through an aerator (22) to a closed holding tank (40). A positive displacement pump (42) recirculates the viscosity adjusted butter from the holding tank, through a recirculating feed line (44) at a preselected pressure, and back to the holding tank. A plurality of packaging machines (C) each include a metering pump (60) which pumps metered amounts of the butter from the recirculating feed line through at least one filling nozzle (62). Sheets of heat-sealable plastic material from rolls (64, 66) are heat sealed (70, 72, 74, 76) into squeeze packets surrounding the metered volumes of butter. A conveyor (100) conveys the filled squeeze packets to a fluid cooling hood (104) in which the squeeze packets are bathed in a cooling fluid, e.g.

Abstract: A transmission shaft, of a mower having one or more rotatable organs and gears, for transmitting rotation of the shaft to the gears. The shaft has a portion that is associated with the gears, and another portion that is not associated with the gears. The other portion has a transverse cross section within a shape that corresponds to that of the one portion end with a dimension smaller than that of the one portion. The reduced dimension of the other portion can be carried out by chemical action, such as by an acid attack.

Abstract: Method of preparing fibers fed from a fiber-loosening device into a wedge-shaped spinning zone of a friction spinning machine having friction elements moveable relative to one another, which includes feeding a fiber-laden carrier-air flow having a component directed parallel to the wedge-shaped spinning zone tangentially to one of the friction elements at a location outside the wedge-shaped spinning zone and in a direction opposite the direction of movement of the one friction element, simultaneously exerting holding forces on the fibers and flinging the fibers against the moving surface of the one friction element so that the fibers are stretched out and held fast thereon, conveying the fibers in held-fast condition thereof into the wedge-shaped spinning zone, rolling the fibers therein and integrating the fibers into a yearn, and drawing-off the thus-formed yarn.

Abstract: A combustion system for gas turbine engines incorporates a feedback loop which provides positive damping for the control of unstable combustion, particularly buzz in reheat systems, but also at least some cases of combustion rumble in main combustion systems. The feedback loop includes a sensor, a control unit and an exciter. The control unit monitors the strength of the sensor signal, which senses a cyclically varying parameter of the unstable combustion process, and adaptively varies the amount by which the signal is phase-shifted and amplified in order to obtain a sensor signal of minimum strength, this being achieved by controlling the exciter in accordance with the phase-shifted amplified signal to change the boundary conditions of the combustion process and thereby eliminate the unstable combustion.

Abstract: A ducted fan type model aircraft power plant having a mounting for a one cylinder internal combustion model aircraft engine. The preferred engine utilizes a special vertically oriented carburetor. A duct is supported by a set of stators having an aerodynamic shape for straightening airflow through the duct. A fan having seven identical individual replaceable blades is disposed at the front of the duct and directly driven by the engine. One stator is adapted to essentially enclose the vertical carburetor and to smoothly direct the airflow from the fan around the carburetor to the engine cylinder for cooling. The stator has an opening to the carburetor air inlet for providing air under pressure thereto. The stator shapes cooperate with the duct and aft fairings of the power plant to deliver a smooth airstream having a uniform non-turbulent flow to produce a maximum propulsive efficiency.

Abstract: A combustion apparatus for a vehicle for regenerating a filter provided in an exhaust gas passage of an engine by burning and removing fine particles in the exhaust gas comprising an air supply passage for coaxially supplying air along the outer periphery of a fuel injection nozzle, a shut-off valve mounted at the downstream side end of said combustion chamber for preventing reverse flow of the exhaust gas, and a controller for allowing the inflow of the coaxial air for a predetermined period of time after stopping the fuel supply from the fuel injection nozzle and then closing the shut-off valve.

Abstract: A spring applied and hydraulically released motor shaft brake apparatus for a hydraulic motor which is compact in size. The brake apparatus includes a piston slidably mounted in a cylinder defining a brake chamber and a drain chamber. The piston is slidably and rotatably mounted on the motor shaft and a spring is disposed in the drain chamber for biasing the piston towards the brake chamber to thereby lock the motor shaft against rotation. The brake chamber is selectively connectible with a pressurized fluid source while the drain chamber is connected with a drain. The piston has formed therein a passage with a restrictor disposed therein for restricting flow of fluid in the passage.

Abstract: In a master cylinder assembly separate master cylinders are connected by a common transfer passage through which the pressure spaces of the master cylinders in advance of pistons are in communication when the master cylinders are operated simultaneously, and communication between the pressure spaces is cut off by a transfer valve mechanism when one of the master cylinders is operated on its own. Each piston is guided to slide in its respective bore only by the sliding engagement with the bore of a guide portion of the piston and the guide portion is disposed on the outermost side of a transfer port with which the transfer passage is in communication when the piston is in a retracted position.

Abstract: A control system for the engagement and disengagement of exhaust gas turbochargers, in which the charging air pressure acts as control magnitude on a first control end face of a slide valve member against the force of a spring; in order to prevent the effects of the strong pressure fluctuation of the charging air pressure, which occur during engagement and disengagement of an exhaust gas turbocharger, on the shifting behavior of the control device, the slide valve member includes a second control end face, on which a second control pressure acts temporarily; the second control pressure and the first control pressure and the working medium for the control system may be formed by the charging air pressure so that no additional pressure sources are required; however, by the use of a spring biased valve the second control pressure may additionally be used for the filling limitation during starting and in the range of lower outputs of the piston driven internal combustion engine.

Abstract: A method of converting thermal energy into another energy form, comprising the steps of providing a liquid working fluid with said thermal energy, substantially adiabatically compressing the working fluid, substantially adiabatically expanding the hot compressed working fluid by flashing to yield said other energy form in an expansion machine capable of operating with wet working fluid and of progressively drying said fluid during expansion, and condensing the exhaust working fluid from the expansion machine. Apparatus for converting thermal energy into another energy form is also provided.

Abstract: A low pressure double flow stream turbine is connected to a condenser and partition plates are disposed within the condenser and turbine to flow to two separate chambers and cooling water flows in series through tubes in the separate chambers producing different back pressures, the last row of rotating blades which discharge into the lower pressure chamber are longer than the last row of blades which discharge into the higher pressure chamber resulting in an improvement in the heat rate of the turbine.

Abstract: In an air conditioner separated into an indoor unit and an outdoor unit, a control circuit comprises a three-phase power source connected in common to the indoor and outdoor units, and a signal line led out from two phases of the power source. A contact of an electromagnetic relay energizing a compressor of the air conditioner is connected on the portion of the signal line in the indoor unit in series with a current sensor sensing the current flowing through the signal line, and a contact of a protective relay protecting the compressor is connected on the portion of the signal line in the outdoor unit in series with the electromagnetic relay. A first controller is disposed in the indoor unit for controlling on-off of the relay contact of the electromagnetic relay, and a second controller is disposed in the outdoor unit for energizing the protective relay contact thereby controlling on-off of the compressor.

Abstract: A heat pump having improved compressor lubrication wherein an adequate amount of refrigerator oil is returned to the compressor at all times and the circulation time for the refrigerator oil is reduced. An oil separator is connected between a discharge side of the compressor and a four-way valve of the heat pump system. A bypass is connected between the oil separator and the accumulator. The bypass is provided with an electromagnetic valve for selectively opening and closing the bypass. A control device periodically opens the electromagnetic valve during the operation of the compressor to provide for supply of refrigerator oil to the compressor from the oil separator.

Abstract: A dehumidifying system for use in a building housing a swimming pool. The system includes a refrigerant compressor, a dehumidifier coil for dehumidifying air within the building, an air cooled condenser for reheating the air previously cooled down in the dehumidifying coil as well as for heating the swimming pool enclosure and a water cooled condenser for heating the pool water. The heat developed in the system can be used to selectively heat the dehumidified air within the building and the water in the swimming pool. The water obtained during dehumidification of the air is collected and returned to the swimming pool.

Abstract: An automatic coin-fed ice-lolly producing and dispensing machine comprises an ice-lolly mould in two parts (9A,9B) kept at a freezing temperature by a refrigeration plant; a controlled supply of pre-cooled syrups (from 17); and apparatus for separating the product from the mould by inducing one part (9A) to move (f9) relative to the other (9B). The product then either drops out of the tilted mould, or is lifted by its stick (15).

Abstract: A refrigerator having a crisper pan with a back passageway that is always open and a front passageway that is adjustable so that the operator can adjust the amount of flow through ventilation to control the humidity in the pan. The lid for the pan also functions as a refrigerator shelf and the back passageway is defined by a gap between the lid and the back of the pan. The front passageway is defined by a front lid plenum having a floor with a plurality of ports. A slide gate positioned in the plenum has a plurality of windows which, by sliding laterally in the plenum, can be made to respectively align with the ports to enable flow through ventilation. Full or partial sealing of the ports is provided by sliding the slide gate laterally to alter the alignment of the windows with the ports.

Abstract: A carriage for a hand-operated knitting machine is disclosed which is suitable for knitting with a thick or heavy yarn. A brush wheel is supported on a support plate for rotation substantially in a vertical or acutely inclined plane and extends at a lower end thereof between a sinker and a forward edge of a needle bed and below a lower face of a knitting needle in the needle bed so that it may push down loops suspended from the knitting needles.

Abstract: A process and apparatus for washing fibre stock. The fibre stock is passed along a passage 14 from a stock inlet 15 to a stock outlet 16. The passage is defined by a portion of the inner surface of a substantially horizontal cylindrical screen 4, preferably a wire gauze. Washing liquid such as water is introduced into the passage, preferably by means of apertures 9 in a longitudinally extending hollow member 8. Effluent liquid passes through the screen, for extraction e.g. through outlets 24 and 25. To enable the washing of stock of high consistency e.g. up to 8%, while avoiding plugging of the screen 4, the arrangement is such that the stock only partially fills the cylindrical screen and is subjected to a tumbling action by the rotary movement of the cylindrical screen as the stock moves along the passage 14 to the stock outlet 16. The hollow member 8 is displaced downwardly from the axis of the cylindrical screen, so as to be positioned within the tumbling stock.

Abstract: An electric door lock is disclosed comprising an elongated housing for mounting in a door or frame member, a bolt slidably mounted in the housing for movement between a first position and a second position with the first position being a projected locking position and the second position being a retracted nonlocking position, a spring for normally urging the bolt towards one of the first and second positions, a solenoid for electrically actuating the bolt to the other of the first and second positions with the solenoid having a plunger element moveable from a first position to a second position, a connector assembly for connecting the plunger element to the bolt to move the bolt to the other of the first and second positions by movement of the plunger element to the second position, and a manually operative rotative assembly for mechanically moving the plunger element to the second position.

Abstract: A combined combination and key-type lock has both a combination lock and a key-type lock, either or both of which may be used. The combined combination and key-type lock is designed so that it can still be opened without dismantling the compound lock and the correct numbers of the combination lock can be detected even if the correct numbers of the combination lock is forgotten.

Abstract: A slide action key shield to hide and protect a key's tumbler cuts and then, on demand, retract to fully expose the tumbler cuts when opening a lock is disclosed. A double capped pin is fixed through the key near the midpoint along the key's length such that each capped end protrudes through a respective longitudinal face slot on the shield to allow the shield to movably cover one half of the shaft of the key or the other. The shield resembles a longitudinally extended sheath open at both ends which conforms to the shape of the key. One end of the shield is flat so that the shield may be easily pushed back by the lock face while the other end is rounded and given side openings to fully retract over the key head without any sharp edges protruding. If the key head is held by a key ring, the retracted shield will be returned by the force of gravity to cover the tumbler cuts when the key is left to hang after use.

Abstract: This invention consists of a small motor powered by dry cell batteries, which may be varied in number to provide the torque or turning power required to open a lock. A drive plate of friction material is attached to the motor shaft, and when the turner with a key in place is inserted into a lock, the drive plate will contact a similar plate that is fastened to the key-retention head. Such contact will cause the head to rotate and produce the required force needed to open the lock. Should a stubborn lock be encountered, the drive plates will slip and prevent a possible broken key. This arrangement also allows "jogging" of the key rotation which may be helpful in loosening a resistant lock. Another feature of this device is the capability of varying the power needed simply by changing the number of batteries and the body segments that enclose them.

Abstract: An improved apparatus for on-line inspection of an intermediate-stage, headed, non-threaded blank for a threaded fastener is disclosed. If the blank fails to meet specifications, the production of blanks is terminated. Improvement features include a roll-sorter for testing all blanks to see if certain dimensional parameters of the blank's head are satisfied. Then, random chosen acceptable blanks are fed to a rotatable table which is constructed to receive a sample blank for movement of the blank to a test station where the blank is tested for other failures to meet dimensional specifications. The rotatable table is constructed to provide interchangeable elements thereof that will accept blanks of different head and stem sizes. Multiple adjustability is provided in the means for transferring blanks, that are first acceptable to the roll-sorter test, on to the rotatable table for further testing.

Abstract: A control device for a rolling machine includes a forecaster for predicting a change in the lateral dimension of a rolled material at the exit of a downstream mill stand based on dimensional variations, and a mechanism by which the tension on the material between two mill stands is altered in accordance with the forecast value, to control the lateral dimension of rolled material exiting the last of a series of mill stands.

Abstract: A motor vehicle body repair bench comprising a standard support for body repairing jigs, made of a bracket having a horizontal cross-shaped slide supporting a vertically slidable rod provided with an upper member of inverted U-shape. The standard support is mounted on a crossbeam and has three degrees of freedom of movement within its structure so that the upper member of inverted U-shape will reproduce adjacent the motor vehicle body a portion of the crossbeam. The universality of the standard support permits the use of body repairing jigs of reduced dimensions, which are mounted on the member of inverted U-shape, and permits positive repairing operations to be carried out in any position on the motor vehicle body.

Abstract: A tube bulger for producing an enlarged ring-like bulge in the material around an end portion of a metal tube includes upper and lower die sections. When the upper and lower die sections are mated together, a cylindrical hole is formed. The end portion of the tube to be bulged extends into the hole. A ring-like, outwardly oriented enlargement of the cylindrical hole in the mated die sections forms a bulge cavity into which the bulge moves as it is being formed. An elongated mandrel extends through the opposite end of the cylindrical hole and into the open end of the tube. First and second sealing rings disposed about the mandrel on opposite sides of the bulge cavity prevent leakage of pressurized oil between the die and the mandrel. An oil conducting channel has an opening between the sealing rings.

Abstract: In a roll forming machine having a base, a motor drive, a gear drive transmission connected to the motor drive and a plurality of vertically aligned longitudinally spaced pairs of complimental pass forming rolls of progressive different shapes respectively arranged in a longitudinal set to successively receive, feed and form therebetween an elongated strip of stock in a continuous operation. Gear means interconnect the transmission and forming rolls for rotation thereof in unison. A rotatable turret mount assembly is provided to support a plurality of radially extending preset sets of form roll tooling, with each set being adapted for a different form of final product. The turret mount assembly is adapted for selected limited rotation upon a longitudinal axis to rapidly place any one of the plurality of preset sets of tooling in its operational position.

Abstract: A housingless beam mill stand is described in which horizontal rolls are mounted in chocks which are prestressed against a rectangular frame by tension bolts which pass through the chocks and the frame, in conjunction with the prestressing cylinder. Vertical rolls are carried by roll chocks which have clearance ways through which the tension bolts also pass, and which permit lateral adjustment of the vertical roll chocks and thus the vertical rolls.

Abstract: A device for indirect extrusion of a hollow section from a billet, in particular a hollow aluminum billet, which is presented to a shape-giving orifice of a die, which is such that a container can be passed over it, thus enclosing the die, and features in its orifice a mandrel that determines the inner contour of the hollow section. A shaping recess is provided, with respect to the extrusion direction x, immediately in front of the shape-giving orifice of the die, the radial dimension of which recess is greater than the width of the shape-giving orifice. The shaping recess is provided either in the face of the die directed towards the extrusion stem or in the face of the extrusion stem directed towards face of the die.

Abstract: A sheet bending brake comprising a first longitudinally extending member having a clamping surface, a clamping member movable toward and away from the clamping surface for holding a workpiece in position for bending and a second member extending longitudinally with respect to said first member. Each of the first and second members have substantially the entire length of the longitudinal edges thereof formed with longitudinally spaced intermeshing integral projections, the projections on the second member having a plurality of aligned openings and the projections on the first member having a plurality of aligned openings comprising slots extending axially with respect to the longitudinal axis of said member. A hinge pin extends through the openings of the second member and the slots of the first member. The second member has a workpiece contacting portion spaced from the projections.

Abstract: A press unit having gripper rails to be exchanged at the same time as the tools, wherein in hollow spaces of the ends of the gripper rails, means are inserted for the locking of the form-fitting or toothed connection of gripper rails on the side of the press and gripper rails on the side of the tool that are to be connected with one another for the transfer of workpieces. The device comprises a control element, a pressing rod that can be acted upon by the control element, and a locking member connected to said pressing rod, with said locking member being slidable in a preferably press side end of the gripper rails and a mating piece for receiving the locking member during the form-locking or toothed connection of the ends of the gripper rails and being slidable in an end at the side of the tool.

Abstract: A transfer press for a stepwise deformation of workpieces includes a plurality of stages arranged in a series and an arrangement for intermittently advancing the workpieces from one stage to a successive stage. Some of the stages are work stages for deforming the workpieces by workpiece-deforming tools and at least one of the stages is an empty stage void of tools. There is further provided a workpiece-supporting arrangement situated in the empty stage for supporting a workpiece while the workpiece dwells in the empty stage and a tool-supporting table normally situated in a work stage in a working position adjacent the empty stage and being displaceable for effecting tool replacement thereon.