Abstract: A generally ear-shaped ring traveler, designed for movement with minimized ring to traveler friction and aerodynamic resistance along the inside of a ring of a yarn twister or like machine, is disclosed. The cross-sectional configuration of the traveler at any given transverse plane is characterized by an oblong shape having a relatively wider or blunt leading edge and a relatively narrower or less blunt trailing edge, with the cross-section being airfoil-shaped in the main body section and in each of the upper and lower transverse arms so as to cause lift forces opposing the yarn forces and the centrifugal force to be generated, and generally drop-shaped in the transition regions between the arms and the main body section so as to provide a generally neutral streamlining effect. This abstract is not to be taken either as a complete exposition or as a limitation of the present invention, however, the full nature and extent of the invention being discernible only by reference to and from the entire disclosure.

Abstract: The invention relates to a process for the production of a false-twist textured, highly elastic, synthetic crimp yarn with low residual shrinkage and latently bound crimp by stretching, false-twisting, heat-fixing and thermal after-treatment of the synthetic yarn at yarn draw-off rates of from 400 to 900 m/min, in which the thread tension during thermal after-treatment is 6-25% of the thread tension during heat-fixing, the time of thermal after-treatment is 2-5% of the time spent in heat-fixing and the temperature of the yarn during the thermal after-treatment is 30.degree.-100.degree. C.

Abstract: This invention relates to a new method of increasing the output of a hydrogen combustion type internal combustion engine by recovery of generated heat and to an apparatus therefor. It is the main object of the invention to raise engine output by producing steam by having generated heat absorbed in water obtained from combustion of hydrogen, obtaining high-pressure generated steam by having said heat re-absorbed in newly introduced water and combining said high-pressure steam with said produced steam.

Abstract: An air-cooled combustor liner is constructed of a continuous, constant-thickness, annular shell having a plurality of rings attached to the inner surface thereof to direct the flow of coolant air entering the shell by way of apertures formed therein, along the inner surface of the shell to provide a film cooling function. The rings, which are fabricated to desired dimensions sufficient to prevent significant thermal distortion which would cause flow restriction, are secured to the inner surface of the shell by brazing or the like.

Abstract: A safety device to be used in an apparatus for cleansing the exhaust gas in an internal combustion engine, comprising an OR-NOR fluidic amplifier, an inlet port of which is connected to the downstream of an exhaust manifold and one of outlet ports of which is connected to the upstream of the cleansing apparatus, the other outlet port being connected to the upstream of a by-pass which diverts from the downstream end of the exhaust manifold to form a passage differing from that of the cleansing apparatus, the by-pass being provided with two-way valve means therein by which the by-pass may be opened or closed.

Abstract: The invention relates to a fluid clutch of the kind comprising cooperating vaned pump and turbine elements between which toroidal power-transmitting liquid vortices are established. At least part of the vanes of one of the elements is movable between clutch engaged and disengaged portions through a wall of the element into a reservoir on the other side of the wall. This reservoir also serves as a stall reservoir into which working liquid is fed automatically upon the existence of a stall condition of the element, so as to reduce the torque transmission capacity to a value preventing stalling of the prime mover.

Abstract: A hydraulic system having pilot line fluid feedback from a fluid motor to valving which operates to change pump output to compensate for motor demand includes a pressure regulator valve for maintaining a predetermined minimum pressure in the pilot line. The pressure regulator valve eliminates the power wasting pressure differential which normally exists between the pump output and the fluid motor demand in demand compensated hydraulic systems.

Abstract: The invention is concerned with an improved mechanical arrangement for controlling the steering and speed function of a hydrostatic control system for a ground driven vehicle. Such a control system comprises a pair of hydrostatic pumps each controlled by a rotatable arm extending from a servo valve mounted thereon along with a pair of hydrostatic motors each driven by a respective one of the pumps and a pair of ground engaging means each on respective sides of the vehicle.

Abstract: A power system is disclosed for use as an automotive drive engine, utilizing combustible fuel and hydraulic drive. A multiple-phase engine, incorporating three piston units, burns fuel to provide alternating-pressure tri-phasic hydraulic energy in three lines. The engine is resonant in operation, i.e. all parts move in a rectilinear mechanically-resonant motion pattern and a constant positional phase relationship is preserved between the engine pistons by a single hydraulic mechanism.As disclosed, the tri-phasic hydraulic energy is applied to a dynamic valve unit for conversion into a unidirectional hydraulic power stream that is applied to actuate one or more hydraulic motors. In the described embodiment, the valve unit is driven by a synchronous electrical motor which is phase varied in relation to the operating phase of the engine by a control unit that regulates the entire system for response to manual commands. The central logic or control unit receives manual command data as well as system data, e.g.

Abstract: Waste heat in the form of the sensible heat of flue gases, sensible and latent heat of geothermal sources, etc., is converted to usable energy. When the energy source consists solely of sensible heat of a gas or a liquid which is not the working fluid, the liquid working fluid is heated by the energy source and then expanded in a hot liquid turbine wherein partial vaporization occurs with decrease in pressure. The working fluid is thereby accelerated as thermal energy is converted to kinetic energy and internal energy of the vapor. The hot liquid turbine can be a hot liquid impulse turbine wherein the expansion occurs in the inlet nozzles and the mixed phase working fluid then impinges on the moving buckets of the impulse turbine transferring the kinetic energy to shaft work.

Abstract: A system of generating electric power derived from the energy of the sun, the atmosphere, the ground or the heat stored in ground water, whichever provides the greatest temperature differential with another adjacent source of energy. During the daytime when the sun is shining, a solar absorber composed of a plurality of black pipes may provide the heat necessary to generate power. At night when the air temperature is lowered, a set of pipes in the ground or in a lake may provide the heat necessary to extract power by using the low temperature of the environment. A third source of heat such as geothermal heat, stored heat or a heat pump may be part of the system. Switching means are used to convert from one system to another depending upon which system has the greatest temperature differential.

Abstract: A flow control apparatus having a noise and vibration suppression arrangement associated therewith. A suitable piping arrangement permits introduction of a pressurized fluid into a chamber above a valve plug movably disposed within the casing of the flow control apparatus. The fluid is conducted into the plug chamber from a region having a pressure therein higher than the pressure immediately beneath the valve plug and passes from the plug chamber to mix with the high velocity inlet flow entering the flow control apparatus to dissipate the energy associated with the influent flow and to prevent excessive noise and vibration levels within the flow control apparatus.

Abstract: A system is disclosed incorporating a positive-displacement compressor-and-engine arrangement for converting heat of a working fluid to attain a pressure increase in a working fluid that is supplied to a turbine system. The system employs a heater interposed to pass exhaust fluid from the drive engine to the turbine system at an elevated temperature. As disclosed, the housing of the compressor-and-drive structure incorporates cooling apparatus, for example so that the reciprocating compressor may approach isothermal operation. Also, the turbine system is divided into one unit which supplies mechanical output power and another to drive a rotary compressor or supercharger, which supplies intake fluid to the positive-displacement compressor, the output of which supplies the positive-displacement engine.

Abstract: A toroidal shaped collector with a radial inlet and a single discharge outlet includes a pair of substantially parallel spaced baffle plates extending from the inlet partway into the collector chamber, disposed in the plane of the collector and serves to receive and discharge the airflow from a gas generator such as a gas turbine engine particularly adapted for nonaircraft applications.

Abstract: A superconducting microwave engine that achieves mechanical to microwave rgy conversion or microwave to mechanical energy conversion. Such is accomplished by employing a superconducting resonator to increase the decay time of the microwaves inside the resonator and thereby provide the resonator with sufficient time to adiabatically deform and change its eigenfrequency so as to effect a change in the frequency and corresponding energy state of such microwaves in accordance with the Boltzmann-Ehrenfest Theorm. This invention may be in the form of a cylindrical cavity and piston combination, a cavity and vibrating diaphragm combination, or a cylindrical cavity and concentric rotor combination.

Abstract: A wave dissipating wall is formed of a plurality of wave chambers comprising a plurality of horizontal plates and vertical partition walls opening toward the direction from which waves come in. The ends of the walls dividing the chambers are wider than the remaining parts of the walls and the front walls comprise semi-circular curved surfaces extending toward the direction from which the waves come in order to introduce the waves into the chamber having a wider width than the entrance formed between the respective front walls and to let the waves circulate within the chamber by the energy of the waves, thereby increasing the friction resistance between the waves and the walls as much as possible and achieving an efficient diminishing of the wave energy.

Abstract: A fluid flow control means particularly for controlling water flow in irrigation systems such as open course or socalled "Border Dyke" systems in which there are a series divided land areas to be irrigated in turn.

Abstract: An apparatus for effecting uniform dispersion of digested effluent, includes a header pipe connected with a source of digested effluent under pressure, and a plurality of effluent discharge pipes connected with the header pipe, and a plurality of flow control effluent emitters are connected with the discharge pipes at spaced intervals therealong to effect uniform dispersion of the digested effluent in a disposal field and the like. The emitters are provided in different sizes and the effluent is pumped therethrough. The apparatus can thus be used in hilly terrain and will provide uniform dispersion of the effluent regardless of high or low ground elevations. The apparatus can be used to irrigate crops or lawns and the like, and thus the digested effluent is a valuable asset rather than a liability.

Abstract: A shock absorbing arrangement for marine structures includes an annular elongated hollow body with an elastomer body molded adjacent one end of the annular body, the elastomer body having a plurality of circumferentially spaced voids therein extending from one end of the body and terminating in spaced relation relative to the other end of the body. A cylinder is molded in the center of the body and has an open end facing in the same direction as the open end of the voids and a closed end adjacent but spaced from the other end of the elastomer body and the elastomer body is provided with an enlargement adjacent the closed cylinder end to serve as a shock absorber and bumper.

Abstract: A plurality (preferably six) pistons and cylinders are suspended from the swage block a precise distance below the upper edge and actuatable radially from the longitudinal axis of a tubular member for making a new pile with anchor knobs for increased load carrying capacity and pull-out resistance.

Abstract: A device for embedding objects such as continuous pipes into water bottoms comprises a support frame which is movable along the bottom on a drive track which is carried adjacent one side thereof. The support frame also carries a plurality of guide and drive rollers which are engageable with the object to be embedded and which engage the object to move the support frame along the object as the drive track advances along the water bottom. A bottom trenching device in the form of a ground mill with a rotatable cutting head is pivotally mounted on a support between the drive rollers and the drive track and it operates on the bottom to remove material therefrom to form a trench. The material may be subsequently directed backwardly over the object to be embedded after it is positioned in the trench.

Abstract: A system for preventing substantial pollution of the atmosphere by benzene vapors displaced from a tank truck during loading of the truck with benzene. The benzene is loaded into the truck at its ambient temperature, and benzene vapors displaced from the truck are cooled to condense them to a liquid state. The system for cooling the benzene vapors is one in which natural gas at high pressure is expanded to a lower pressure, and the cooling effect which takes place during the expansion is utilized to cool and condense the benzene vapors.

Abstract: A beverage dispensing system has a water line to be connected to a source of water, a refrigeration evaporator line extending through and along a length of the water line, and a thermostatic control that has a sensing element extending along refrigerated portions of the water line.

Abstract: An air conditioning unit of the type adapted for installation externally of the space to be conditioned includes an outer housing separated into internal compartments by interior partition means and includes a belt-driven blower in one compartment for forcing air through heat exchanger means including a refrigerant evaporator, with the motor for driving the blowers being located in a compartment separate from that in which the blowers are located, the motor being cantilever mounted on a wall between the compartments with means provided to fasten the motor so that it may be shifted toward and away from the blowers to adjust belt tension but without uncovering an opening in the wall through which the blower motor shaft projects. Thus motor heat is prevented from mingling with the air which is blown across the refrigerant evaporator.

Abstract: A process and apparatus for controlling the air temperature in buildings, particularly large multi-room buildings, which eliminates the use of conventional refrigeration units during substantial portions of the year, providing a significant reduction in energy consumption. A liquid stream is cooled in an air cooling tower outside the building by contact with the ambient or outside air, is filtered to remove contaminants, and is circulated in a cyclical flow directly between the heat exchangers or induction unit coils in the building and the cooling tower outside the building, which preferably cools the liquid substantially to the outside ambient wet bulb air temperature. The system is used when the wet bulb temperature of the outside air is low enough to provide liquid at an effective cooling temperature, preferably at or below the desired temperature of the room air, and more preferably at a predetermined liquid temperature desired at the induction units for cooling.

Abstract: A system for extracorporeal perfusion of human organs wherein a pulsatile flow of cold perfusate is circulated through an organ intended for transplantation. The system includes a perfusion chamber, a heat exchanger comprising an ice water bath containing a coil of tubing through which perfusate is circulated, and a pulsatile pump interposed in the line between the heat exchanger and the perfusion chamber, downstream of that exchanger, for drawing cold perfusate through the exchanger and directing it in a series of regular pulses to the organ. The system is particularly adapted for use in a compact portable perfusion unit.

Abstract: A cooling receptacle for individual beverage containers comprises a double-walled cylinder open at the top and closed at its base. The base is hollow and contains a high density granular material. The inner cylindrical wall is formed of a material having a higher thermal conductivity than the material of the outer cylindrical wall. An annular resilient retaining element is secured to the inner surface of the inner cylindrical wall. A detachable closure disc formed of a material having a relatively low thermal conductivity and having a central opening exposing the cavity of the receptacle is adapted to seal the cooling chamber between the inner and outer cylindrical walls of the receptacle.

Abstract: Disclosed herein is a reversible air cycle heat pump, or conditioner that provides cooling and heating options. A condenser plenum and an evaporator plenum are separated by a compartment. The compartment has a vertical partition transverse to the condenser and evaporator plenums. A single damper is carried horizontally within the compartment, and has a co-acting portion on either side of the partition. One end, or outdoor portion, of the compartment has outdoor discharge and suction chambers on either side of the partition. The other end, or indoor portion, of the compartment has indoor discharge and suction chambers on either side of the partition, with the damper dividing the indoor portion from the outdoor portion. Windows on one side of each of the condenser plenum and the evaporator plenum communicate with the compartment. The damper is pivotal about an axle axis carried transverse to the partition.

Abstract: An ornamental and defensive finger ring formed of a plurality of ring sections each having a central circular aperture to encircle the finger of a wearer, and held in stacked sequential, contacting relation with respect to a common central axis of the sections, at least one section being selectively adjustable for guided angular movement about the axis, between a first and ornamental position and a second position wherein the sections are releasably held in a different ornamental and defensive relation.

Abstract: Herein disclosed is a torsionally resilient shaft coupling for serially transmitting torque and to provide a substantial amount of torsional flexibility between a pair of axially spaced coaxially aligned shafts. The torsionally resilient shaft coupling comprises a first inner sleeve and a second inner sleeve coaxially aligned with and axially spaced from the first inner sleeve. A first outer sleeve is connected to a first of the shafts and surrounds the first inner sleeve forming a first annular space therebetween. A second outer sleeve is connected to a second of the shafts and surrounds the second inner sleeve forming a second annular space therebetween. At least one first annular torsionally resilient member is interposed in the first annular space and is connected to the first inner sleeve and to the first outer sleeve to provide primary torsional flexibility between the first outer sleeve and the first inner sleeve.

Abstract: A joint for homokynetic transmission of rotary motion between two concurrent shafts of which head portions are mounted. The head portions are connected by pairs of articulated driving-rods each slidably and rotatably disposed in a respective bore in a respective head portion. All the pairs of rods ensure the rotary transmission, and both head portions are also hinge-coupled with double articulation line by means of coupling-boxes loosely mounted on the head portions.

Abstract: A knitting machine is disclosed in which measurements are made reflecting the output characteristics such as the forces incident to the operation of the knitting needles relatively to operating cam means therefor, and a system is provided for influencing one or more of the operating characteristics of the knitting machine such as speed of operation, rate of lubrication, or the like, in response to such measurements.

Abstract: Patterning mechanism for electrically controllable knitting machines for selecting the knitting needles or their control elements, with which are associated bendable control springs having at least two positions for initiating selection operations according to pattern, for the completion of which at least a further auxiliary means is provided, the control springs being freely-oscillating active bending vibrators, as herein defined. The control springs may consist of piezo-electric elements controllable by an electric field or may consist of multilayer, bimetallic elements controllable by a magnetic field.

Abstract: A hand knitting machine having a needle bed, a series of sinkers extending from the front edge of the needle bed, a series of corresponding number of latch needles alternated with the sinkers, an actuator movably supported on the needle bed, and needle selecting means. The needle selecting means has a central sinker on the actuator and at either side of the sinker a selecting cam having a duplicatedly inclined acting cam face inwardly backwardly of the actuator. The needle selecting means further has a control means to selectively restrain the needles from being subject to the selecting cam, whereby all the needle are divided into two groups each time the actuator travels in either direction on the needle bed.

Abstract: An electric device selects the needles of a rectilinear knitting machine. A carriage which moves in front of the needles is provided with an electro-magnetic member which successively operates the needls during its displacement. The device includes a memory member containing data for activating the electromagnetic member to operate the needles required for making a determined width of a knitting. A scanning installation scans the memory member synchronously with the displacement of the carriage.

Abstract: A pattern forming device in a knitting machine comprising a framework, a needle cylinder journaled in said framework and having a plurality of vertical slots in its periphery, knitting needles slidably received in said slots for vertical movement, a rotary cylinder journalled in said framework above said needle cylinder, a pattern yarn guide cylinder secured to said rotary cylinder for rotation therewith and having a plurality of vertical slots in its periphery, pattern yarn guide pieces received in said slots in the guide cylinder for vertical movement and having notches, a cam member secured to said framework and received in said notches, said cam member having rest and yarn feed cams arranged in its periphery said guide pieces having slots at the lower ends, a twisted piece loosely received in the slot of each pattern yarn guide piece and having a threaded rod integrally formed therewith and a pattern yarn guide arm connected to the lower end of said threaded rod and having a pattern yarn hole for threadin

Abstract: A pattern-yarn feed device in a knitting machine in which a needle-cylinder has a plurality of circumferentially-spaced, vertical slots in its periphery and receives vertically-slidable needles; a rotary cylinder above the needle-cylinder and a guide cylinder surrounding and secured by the rotary cylinder and having circumferentially-spaced vertical slots; a cam member surrounding and opposing the guide cylinder and including rest and pattern-yarn-feed cams; a vertical-guide piece received in each slot in the guide cylinder and engaging the cam member for vertical reciprocation as the guide cylinder rotates, the guide-piece having a guide slot at its lower end; a twisted rod unit guided in the guide slot in the guide-piece and rotatable as the guide-piece rotates; and a horizontal guide arm secured to the lower end of the twisted rod unit and having a pattern-yarn-guide hole rotatable as the twisted rod unit rotates and a pattern-yarn is guided through said guide hole in the guide arm into one or more knittin

Abstract: A circular knitting machine is described in which two devices for temporarily trapping cut fringe yarns are mounted on the needle cylinder, respectively immediately following the last needle to knit and immediately preceding the first needle to knit. Each trapping device has a radially movable yarn gripping jaw urged into contact with a fixed jaw by resilient means. A cam-operated mechanism temporarily moves the movable jaw out of contact with the fixed jaw against the action of the resilient means in order to allow insertion of a fringe yarn between the jaws and release of a fringe yarn from the jaws.

Abstract: A continuous padding type dyeing machine particularly suitable for handling elastic fabrics, the machine including a padding bath with at least a pair of main and auxiliary padding rollers and a dryer having a pair of spaced endless conveyors means provided on opposite sides of a path of travel of the fabrics for transferring them through the dryer without causing excessive tensioning thereto. The endless conveyors are movable in and along a number of adjustable guide members and provided with a number of pin members for holding longitudinal side edge portions of the fabrics. A pair of detectors are provided at a lower end of a vertical section of the path of travel of the fabric through the dryer in association with opposite longitudinal side edges of the fabric for adapting the guide members to the particular width of the fabric under treatment.

Abstract: The invention relates to a laundry machine comprising a washing drum which is rotatable about its longitudinal axis; the generated surface of the drum being formed with apertures through which washing liquid can flow. The drum is supported, preferably by an endless retaining element, such that an outer surface of the drum is spaced apart from an inner surface portion of a casing. At least one partition extends substantially radially inside the drum thereby dividing the drum into discrete segments. The partition has an aperture and conveyor means are disposed inside the drum for conveying laundry from one segment of the drum to an adjacent segment thereof via the aperture. A flange extends substantially radially outwardly from the drum, and from between each pair of adjacent segments thereof, thereby dividing the gap between the drum and the casing into pockets or chambers, means being provided for obtaining a fluid-tight seal between each flange and the casing.

Abstract: A lock assembly comprises a stud for mounting on one member such as a door, a plate for pivotal mounting on another member and a separate locking member for locking the plate to the stud having locking mechanism comprising a cylinder slidable in the locking member and onto the stud, a ball movable through the cylinder wall from a locking position where it engages a groove in the stud and an unlocked position, a ring catch for holding the cylinder and thus the ball in their locked positions and a key-operated lock for operating the catch and also a dead lock.

Abstract: A door lock structure adapted to be actuated by a magnetic card key and to actuate a conventional cylindrical door lock with substantially no modification to such door lock. A housing containing the magnetically operated elements of the lock is mounted coaxially relative to the cylinder plug of the conventional lock. Insertion of a properly coded magnetic card releases a locking bar which normally holds the structure in locked position, and the entire assembly may be turned to retract the latch or dead bolt.

Abstract: A wheel lock for preventing theft of automobile wheels comprises a first cover plate blocking access to the wheel bolts, said plate being attached to said bolts by screws passing through the plate, and a second cover plate in contact with and covering said screws. The cover plates are held in position by a removable plug lock passing through both of said plates.

Abstract: A structure for preventing the movement of a vehicle by preventing the movement of the gear shift rod. A locking unit is mounted in any suitable place within the vehicle and comprises a clamp which is connected onto a linkage rod to the gear shift and which is normally freely movable with the movement of the gear shift. The clamp unit also comprises a plate portion having an aperture into which a cable having a lock pin on one end can extend when it is desired to prevent any movement of the clamp. The cable is able to extend the pin into and out of the aperture and clamp from a place remote from the clamp itself by a plunger arrangement which is normally extended in an unlocked position but when depressed or urged inwardly causes the entry pin at the other end to move into the aperture and prevent movement of the clamp and thereby prevent movement of the gear shift. A key may be turned to maintain the plunger in locked position against the action of a spring normally urging the unit into unlocked position.

Abstract: A key ejector lock adapted for use in the door of a cabinet or other enclosure and which will eject the lock key in any rotational position thereof comprises a tubular barrel, a front end plug rotatable and axially reciprocally movable in the barrel and having a keyway extending therethrough, a rear end plug rotatable in the barrel and adapted for connection to a locking member, drive means interposed between the plugs and fixed to the rear end plug for rotation therewith, means providing a sliding drive connection between the front end plug and the drive means, means resiliently urging the front end plug forwardly in the barrel, means on the barrel providing rearwardly opening circumferentially spaced internal notches, lug means projecting outwardly from the front end plug and removably received in the notches for securing the rear end plug in respective locked and unlocked rotational positions, a key ejector axially reciprocally movable in the barrel between the front end plug and the drive means and engagi

Abstract: The invention relates to a door-locking and release system in a building in which system a door is adapted to be held locked by a component removably affixed thereto. Said component is adapted to operate an electrical circuit, such as to deactivate off an alarm circuit, only when detached from the door to provide an indication that the door is in the unlocked condition.

Abstract: Improved method of coldworking a metal workpiece involves using a low smoking lubricating composition containing certain amounts of water, potassium nitrite, potassium soap of a sulfurized fatty acid, glycerine, defoaming agent and a block copolymer of ethylene oxide grafted on a polypropylene oxide which copolymer has both a molecular weight range and contains an amount of ethylene oxide content sufficient to cause the composition to remain homogeneous between ambient temperature and the composition's boiling temperature.

Abstract: A machine for semi-automatic grooving of pipe, capable of high output of full or less than full lengths of pipe with uniform external circumferential grooves, has supporting idler rolls for automatic positioning of the pipe axis at a small angle of deflection to draw the pipe end in as grooving progresses, with respect to a driven backup roll and a freely rotatable grooving roll. Pipe vibration during rotation is damped by hydraulic means. An adjustable groove depth control and a safety mechanism are also provided.

Abstract: A return guiding device for reversing the direction of travel of flat metal material and suitable in particular for inserting metal strip into so-called S-roller frames consists of a return guide shell having an area of small width occupied by rollers, so that during guidance the corners at the leading edge of the strip do not rest on the rollers but only on smooth edge regions of the return guide shell.

Abstract: The invention relates to rolling production. A pipe cold-rolling mill comprises a stand which has a housing with longitudinal guides rigidly fixed therein. In said guides a carriage is installed on a pair of backup rolls mounted in the housing. Said carriage is connected via a crank gear with a drive of the mill to effect the reciprocating movement of the carriage in said guides in the process of rolling a pipe. Said carriage also carries a pair of working rolls positioned at both sides of the axis of the pipe to be rolled. Said working rolls interact each with one of the two backup rolls and are, together with the latter, spring-actuated one with respect to the other.