Abstract: The distinguishing feature of the invention resides in the fact that each tine of the rake bar is configured in the cross-section as an isosceles triangle with a working edge defined by a vertex of an angle between the lateral sides in the direction of rotation of the reel, and in the zone of the vertex, the working edge of the tine is defined by the base of the isosceles triangle. A portion of each tine between its vertex a fastener member for attaching the tine to the bat blade is curvilinear and has a longitudinal slot.

Abstract: In an apparatus for grinding comprising at least one grinding working member (1) kinematically associated with a drive (6), according to the invention, the working member (1) is made in the form of at least one arc-shaped spiral (2) with a progressive winding, associated with the drive (6) for rotation about its center line (13), the adjacent coils of the working member (1) being contiguous with one another on the inside radius of curvature of the working member (1).

Abstract: An optical system of a television camera comprises, according to the invention, arranged in the direction of the light flux on one optical axis, an objective composed of n elements and a faceplate of a television tube, a light-sensitive layer being located on the last, in the direction of the light flux, surface of said faceplate. The last, in the direction of the light flux, element of the objective has an optical power other than zero and is made as, for example, a concave-flat lens having its concavity facing the object. This last element is the faceplate (3) of the television tube (4).

Abstract: A magnetic system comprises a frame with at least one coil arranged coaxially thereon and providing for the setting-up of a magnetic field, and a cooling system. Wound in layers on a former of each coil are conducting and insulating tapes encompassed by a serving on an outer surface. Means for circulating coolant are disposed in close proximity to end surfaces of the coils, a gap being provided to allow flow of said coolant between the end surface of the coils and said means. The end surfaces of the coils are formed substantially by extremities of the conducting and insulating tapes.

Abstract: An apparatus is described for storing and dispensing elongate flat strip material for use with rotating machinery, such as that used to produce helically wound interlocked flexible pipe. The strip material is fed from an external payoff or supply reel and guided by an inlet guide roller to feed the advancing strip tangentially onto a series of storage guide rollers which are spaced from each other about a circular path concentric with the machine axis. The strip is maintained under tension and is wound onto the storage guide rollers to provide a reservoir of strip material arranged in a single row of substantially circular overlappping convolutions concentrically arranged about the machine axis.

Abstract: Quick assembly and knock-down box has a lower open end which closes upon opening or assembly of the box by having two pairs of adjacent closing panels connected to each other and having configurations and fold lines to cause the closing panels to unfold to positions where all closing panels mesh or mate to form a substantially closed bottom wall suitable for supporting a plastic liner filled with liquid such as oil. The blank for the box and the oil recycling kit which incorporates the box are described.

Abstract: A device for cleansing the colon includes an elastic housing with an oval-shaped end and provided with an aspiration channel and a discharge channel isolated from each other, each channel having its own outlet port in the end of the housing. An endoscope is built into the aspiration channel and is provided with a transparent balloon on its working portion, while the discharge channel accommodates an open-end capillary tube whose open end is brought outwards through the end of the housing, the other end of the tube being connected to a pressure measurement instrument.

Abstract: A device for electrode-tool feed control in electroerosion machines includes a power source (1) equipped with reservoir capacitors, one output of the power source (1) is connected to a workpiece (2) and the other to the electrode-tool (3), a threshold circuit (4), and one of the inputs of a switching device (5). The output of the threshold circuit (4) is connected to an electronic switch (6) and to the second input of the switching device (5) whose output is connected to an amplifier (7). The output of the amplifier (7) is connected to a diode bridge (8) of a converter unit (9), connected in series with a primary winding (10) of a transformer (11) of this converter unit (9) and to an AC supply line (12). The output of the electronic switch (6) is connected to the other diode bridge (13) of the converter unit (9) and to a second primary winding (14) of the transformer ( 11) of this converter unit (9).

Abstract: An apparatus is used for both repair of operating pipelines and protection of newly built pipelines and comprises a cleaning tool (1) which is caused to move in the interior of the pipeline (5) under the action of a flow of fluid containing a dissolved inhibitor. The cleaning tool comprises a hub (3) on which blades (4) are secured in two rows to engage the pipeline surface. The blades (4) are displaced with respect to one another so that the angle between two adjacent blades is from 10.degree. to 25.degree. to define apertures along the periphery of the cleaning tool through which jets of fluid can flow to remove a part of deposits and to impregnate the remaining layer with the inhibitor dissolved in the fluid as so to form a protective coating. A support member (11) carrying an impact-type alarm member is mounted on the cleaning tool (1) so as to facilitate location of the apparatus in the pipeline and to maintain the apparatus in a desired position.

Abstract: A two-phase gate motor comprises a stator (1) with power windings (2, 3) having different phases, a rotor (6) made as a permanent magnet with poles (7) on the active surface, facing the power windings (2, 3), and magneto-sensitive rotor position pickups (4, 5) disposed very close to the power windings (2, 3) and having outputs thereof connected to inverting inputs (10, 11) and non-inverting inputs (12, 13) of the operational amplifiers (8, 9). Outputs (14, 15) of the operational amplifiers (8, 9) are electrically connected to means (20, 21) for compensation of electromagnetic interferences produced by the power windings (3, 2) of different phases in the magnetosensitive rotor position pickups (4, 5) connected, in turn, to inputs (10, 13) of operational amplifiers (8, 9) respectively.

Abstract: Disclosure is made of a system for remote transmission of the angular position and force between the master and slave shafts, which includes master and slave synchronous machines (1,2) whose shaft position sensors (9,10) are electrically connected to inputs (11,12) of a unit (13) for assigning orientation of stator magnetic fields of the synchronous master and slave machines and to information inputs (15,14) of a device (16) for assigning the amplitude of stator magnetic fields of master and slave synchronous machines, having its output electrically connected to a control input (21) of a unit (22) producing current in the windings of the synchronous machines, having its setting input (23) connected to the output of the unit (13) for orientation assigning. The outputs of the producing current unit (22) are connected to electrically linked respective windings of the synchronous machines (1,2).

Abstract: A method of brazing of an outer carbon steel shell to an inner stainless steel shell, in which a stainless steel sheet material of the inner shell is rolled up with an overlap and arranged with a clearance inside the outer shell, braze material is placed in the clearance, walls of the rolled sheet material of the inner shell are forced to the inner surface of the outer shell, longitudinal edges of the sheet material of the inner shell are weld-joined to form the inner shell, air is evacuated from the clearance, and ends of the outer and inner shells are joined by circular vacuum-tight corner welds, one leg of which extends radially and has a length equal to at least one thickness of the inner shell, whereas the length of the other leg, which extends longitudinally, is equal to at least twice the thickness of the wall of the inner shell and said inner and outer shells are brazed in a furnace forming after cooling a bimetallic cylindrical article.

Abstract: An elastic suspension of a vehicle having a frame with at least one axle includes a lamination (3) of leaf springs interposed between the frame (1) and axle (2) and mechanically connected thereto. A plate bracelike spring (4) extends lengthwise of the lamination (3) of leaf springs. The adjacent mid portions (5,6) of the lamination (3) of leaf springs and plate bracelike spring (4) are mechanically interconnected by means of a fastening assembly (7).

Abstract: An electromagnetic oscillation motor has an asymmetrical four-pole stator with an a.c. winding including two paths connected in parallel. Each path includes two serially connected coils received on the adjacent poles of the stator. The poles of the stator forming one pair are offset in opposite directions away from each other, while the poles forming the other pair are offset toward each other relative to the symmetry axes of their corresponding poles of the armature, through a distance equalling one half of the angular width of the stator winding. The oscillation motor further comprises a four-pole symmetrical armature, its poles being provided with a d.c. winding. The coils of this winding are connected in pairs in the matched-series fashion, while the pairs themselves are interconnected in opposition.

Abstract: The machine of the invention, intended for resistance butt welding of pipes, comprises two semi-housings mounted externally on the pipes to be welded to the opposite sides of a joint and interconnected by the flash and upset drive, a clamping device mounted in each semihousing, including radially arranged hydraulic cylinders with clamping shoes, and a control system of the hydraulic cylinders.The control system of the hydraulic cylinders includes control valve units structurally associated with the piston rods of the hydraulic cylinders. The control valve units include follow-up spool valves interconnected by their common actuator linkage.

Abstract: The method consists in that a flat work in an initial position is oriented horizontally between cooled mold beams. Plasma torches are arranged in line across the parallel side edges so that the anode spots of the extreme torches are confined by said edges of the work. By supplying a plasma forming gas and electric current to the plasma torches the work is heated with the formation of a metal pool which extends across the work from edge to edge. By relatively moving the work and the plasma torches in a horizontal plane and along the edges of the work movement of the metal pool over the surface thereof is effected and thereby a remelted layer as thick as the pool is deep, is obtained. The apparatus for carrying out the method comprises a sealed chamber containing a mold having two beams arranged in a horizontal plane and being parallel to one another.

Abstract: A two-pole electric motor constructions are described which have stator winding encircling the rotor, and the method is described of assembling same. A main stator section is provided with coil bearing surfaces which receive rotor coils after the rotor has been inserted into the rotor receiving opening, the coils being moved into overlapping relationship with the rotor and limited in movement or aligned by a stop or limit projection between the coil bearing surfaces. The main stator sections are secured either by the use of U-shaped upper and lower yokes, or rectangular yoke sections to fix the positions of the stator coils, and the rotors are mounted for rotation but against axial movement by the means of suitable brackets or stand-off or spacing members.

Abstract: A Zamitter blade spring is made from a resilient blade (1), which comprises a midportion (2), and end portions (3,4) of different lengths (S, S.sub.1) joined to the midportion (2) by their ends. Other ends of the end portions (3, 4) of the blade have eyes (7, 8) to receive elements of pivotable connetions of the spring blade with longitudinal axes (9, 10) of these eyes substantially perpendicular to the plane of arrangement of the neutral line (11) of the resilient blade (1) passing through the centers (15, 17) of gravity of its transverse sectional planes (5, 6).