Abstract: A lighting system comprises gaseous discharge lamps (8) connected to a source (1) of regulated alternating current through current transformers (5). The primary windings (6) of the current transformers (5) are connected in series to the source (1). The gaseous discharge lamps (8) are connected to the secondary windings (7) of the transformers (5).The lighting system is designed for lighting industrial buildings, streets, highways, stadiums, mines, etc.

Abstract: The klystron of the invention comprises cavities 5 with face walls 7 and drift tubes 8. There are annular slots 9in the face walls 7 and drift tubes 8, said annular slots 9 accommodating plates 10 rigidly attached thereto, said plates 10 being made of a nonmagnetic material. The height of the plates 10 is less than half the height of the body 6 of the cavity 5. The length of the plates 10 is equal to the half-difference between the inner diameter of the body 6 and the inner diameter of the drift tube 8. The length of the inner circumference of the body 6 is more than ten times the total thickness of the plates 10.The klystron of the invention can be used in radioelectronic units to provide for higher stability of their output characteristics.

Abstract: A stator of a generator, which stator comprises a housing accommodating a slotted magnetic core 2, a dielectric oil-separating cylinder 4 arranged next to the internal surface of the magnetic core, and a winding composed of two series-connected half-windings 7, 8, each composed, in turn, of high-voltage elements 6. The high-voltage elements 6 of one half-winding 8 in the slotted part of the stator are placed in insulation sleeves 14 which have hollow projections 15 on their internal surfaces. Placed between the hollow projections is a thermosetting compound. The part of each insulation sleeve, which extends beyond the slotted part of the stator, has a cylindrical portion integral with a cone-shaped cable-type termination reinforced with current-carrying layers.

Abstract: A device for exciting a master generator of self-contained power units for transportation facilities comprises a master generator with a first excitation winding, an auxiliary exciter generator with a second excitation winding, an exciting current regulator, and an independent d-c source. One of the leads of the first excitation winding of the master generator is electrically coupled to a respective d-c lead of the auxiliary exciter generator through its second excitation winding connected accordantly in series with the first excitation winding of the master generator.

Abstract: Wire payoff devices are described which are used in conjunction with bobbin supporting cradles typically found in wire stranding and cabling machines such as high speed tubular stranders, bow or skip stranders and planetary stranders. The payoff devices include dancer arrangements each having a pair of pulley wheels mounted on a common support member which is itself mounted for independent movements along two substantially orthogonal directions. One of the pulley wheels is effectively fixed and continuously releases the wire along the axis of the cradle. The other or receiving pulley repeatedly traverses the axial width of the bobbin to follow the take-off points of the wire to provide uniform take-off and prevent scraping or chafing of the wire.

Abstract: A shaft furnace comprises a body (2) made up of superimposed heated sections (3,4,5,6 and 7) each of which is provided with a tubular member (10,11,12,13 and 14) having its walls arranged at an angle of 3 to 4 deg. to the longitudinal axis of the furnace. The tubular members (10,11,12,13 and 14) are partially inserted one into another with a gap (15) formed therebetween; the opening area of the lower portion (16) of each tubular member (10-14) of each section (3-7) is 20 to 25 percent smaller than that of the upper portion (17) of the adjacent underlying tubular member (11) of the furnace section (4).In the area of the gaps (15), the upper portions of the tubular members are formed with pockets (30) which are connected with outlet pipes (20) intended for discharging gaseous and vaporous fumes from the furnace shaft.

Abstract: A method of preparing contacts and electrodes of electric vacuum apparatuses comprising the steps of exposing the contact (electrode) surface to a concentrated thermal flux of 10.sup.4 to 10.sup.6 W/cm.sup.2 in a vacuum or in the environment of an inert gas for 21 to 100 ms and subjecting said surface to subsequent cooling at a cooling rate ranging from 10.sup.4 to 10.sup.6 K/s.

Abstract: A game ball holder for holding a ball, such as a tennis ball, on a garment. The holder includes two elongate strips of elastic material arranged side by side with one lateral edge of one strip adjacent to one lateral edge of the other. The adjacent lateral edges are joined together along a prescribed length from each end and unjoined for a prescribed length midway between the ends. The strips are either attached directly to a garment or attached to a base of cloth material which, in turn, is attached to the garment.

Abstract: A device for attachment of coil ends in a generator stator high-voltage winding includes insulation spacers (13) disposed on external surfaces of the coil end bars (16), auxiliary spacers disposed between coil end bars (16), a case (1), spring stops (15) anchored inside the case (1), and planks (14). The case (1) is made of two coaxial truncated-cone members (2 and 3) and a part of a torus member (4) made integral therewith and incorporating a joint (5) with a seal (6). Each plank (14) is arranged between two insulation spacers (13), and the insulation spacers (13) are arranged between the coil end bars (16) and the spring stops (15). The insulation spacers (13), the planks (14), the spring (15) and a side surface of the case (1) form cooling passages.

Abstract: An electronic ergometer for cardiac arrhythmia patients is disclosed, and it is capable of determining and indicating the magnitude of power developed by an individual. In addition, it can indicate the power at which a cardiac arrhythmia occurs. In one embodiment of the invention, the electronic ergometer is capable of storing the magnitude of power developed by the patient at which the cardiac arrhythmia occurred. The device consists of various electronic components encased in a simple housing attached to the belt, or other clothing, of the patient. It is used by the patient during physical activity, in order to monitor the work and power of the patient. In addition, since an electrocardiogram sensor is provided, the unit sounds an alarm when a cardiac arrhythmia occurs. This advises the patient to cease his working and to rest.

Abstract: A linear electric motor comprises a stator constructed in the form of two equidistant ferromagnetic strips 1 and 2 provided with alternating projections 3 and recesses 4 having a length equal to the pole pitch .tau. of the motor. A movable core 5 is disposed between the poles 1 and 2. The projections of the strip 1 are shifted relative to the projections on the strip 2 by a distance .tau.. An excitation winding 3 is laid in the middle portion of the core 5, characterized by a low magnetic permeability. An armature winding 9 is laid in the extreme portions of the core 5, having a high magnetic permeability, in symmetrical relationship with respect to a winding 8. Two coil groups of the winding 9 have equal number of sections and are electrically connected in a commutation device 10.

Abstract: A percussive-action pneumatic tool comprising a handle-carrying frame having successively accommodated therein a shock-absorber and a housing with the percussion mechanism therein, connected through a gas distribution system to a compressed air source. The frame has a length sufficient for abutting against the surface of a material being worked and has a guide which receives the housing with the percussion mechanism. The shock-absorber includes a receptacle mounted on the frame and communicating via a controllable valve alternatively with the compressed air source and the atmosphere, a rod being mounted in this receptacle, adapted to act upon the housing with the percussion mechanism, to move the housing relatively to the frame as compressed air is supplied into the receptacle.

Abstract: A piezoelectric motor of the invention comprises a stator and a rotor one of which includes at least one first piezoelectric oscillator. The rotor consists of a first and a second parts one of which parts includes a second piezoelectric oscillator. Said parts of the rotor are mounted for relative rotation about the axis of rotation. The first part is in contact with the stator along the first surface of frictional interaction and with the second part along the second surface of frictional interaction. Each surface of frictional interaction is formed by rotation of at least one straight line length about the axis of rotation of the rotor.

Abstract: A digital tracking phase meter comprising a shaper of narrow pulses corresponding to a leading edge of an input square-shaped signal, connected by the output thereof to one input of a switch, the other input of which is applied to a data output of a phase cycle fraction reversible counter, and the output of which is connected to an input of a pulse counter. A countdown input of said pulse counter is connected to a count pulse generator, and the output thereof is connected to an input of a control pulse distributor switch. The other input of said switch is connected to an input of a control pulse distributor inverter and serves as an input of the digital tracking phase meter, whereas the output thereof is connected to a countup input of said phase cycle fraction reversible counter.

Abstract: A method for rolling H-sections in a continuous mill comprises bevelling of the leading edge of a billet on the faces which are horizontal during rolling and subsequent rolling thereof in slitting and beam passes. The end of the billet is bevelled at an angle of 20.degree.-30.degree. relative to the horizontal axis thereof.

Abstract: An excitation system for a synchronous machine comprising an exciter having its output connected through a current relay in parallel with a starting-protecting unit. The starting-protecting unit includes parallel branches, each comprising a series-connected resistor and thyristor switch having a voltage-sensitive threshold element connected between its anode and gate. A turn-on unit for the parallel branches of the starting-protecting unit includes a voltage-sensitive overvoltage detector connected in parallel with the exciter output, in which the voltage setting is lower than that of the threshold element of the parallel branches of the starting-protecting unit. A memory unit; and a pulse-forming unit. The output of the overvoltage detector is connected through the memory unit to the input of the pulse-forming unit. The output of the pulse-forming unit is connected via the contacts of the current relay to the gates of the thyristor switches in the parallel branches of the starting-protecting unit.

Abstract: A pipe resistance butt welding apparatus comprises a movable clamp and a fixed clamp to locate the pipes to be welded. Current-feeding shoes contact the ends of the pipes to be welded together. A device is provided for axially moving the movable clamp in fusing and upsetting the pipes. Both clamps and the device are mounted on an elongated supporting member. The shoes are carried by beams oriented along the supporting member and having bevels acted upon by drive rollers, whose axes are directed across the supporting member. The invention is useful for welding large diameter pipes.

Abstract: A tapered screw joint with the thread profile whose bearing side is inclined at an angle of from about 86.degree. to about 98.degree. to the plane which is perpendicular to the thread axis.Such a tapered screw joint of parts makes it possible to disconnect them rapidly and repeatedly under the effect of axial tensile loads with subsequent reconnection under the effect of an applied torque. This screw joint will be used most effectively in a device for the emergency recovery of the boring tool from a borehole.

Abstract: An apparatus for measuring the power of heat radiation, comprising a sensitive element implemented, for example, as an electrically conductive filament adapted to be displaced in a heat radiation flux at a stabilized speed. Connected to the sensitive element is a meter for registering the variations of the temperature of the sensitive element, resulted from the heat radiation.A system for measuring the power of a heat radiation, comprising at least three such apparatuses.