Abstract: A cryogenically cooled electrical machine comprises a superconducting field winding placed inside a hollow rotor surrounded by a cooled magnetic shield and a heat shield. The magnetic shield is arranged within the heat shield and is cooled by a coolant circulating in ducts made in the heat shield, the heat and magnetic shields being arranged within an evacuated space between the rotor and the shell of the electrical machine. This embodiment of the electrical machine makes it possible to increase the efficiency of thermal protection of the superconducting field winding.

Abstract: The apparatus comprises an explosion chamber made in the form of a tube closed at one end and accommodating at least one spark plug. The explosion chamber communicates with a chamber for preparation of an explosive mixture and with a batcher metering pulverulent coating material. The batcher includes a mixing chamber of the batcher communicating with a hopper via a passage. The passage accommodates a device for controlling the cross-sectional area thereof and is provided with a jet nozzle for positively feeding the coating material to the explosion chamber. A partition wall of a gas-permeable material is mounted within the hopper in equally spaced relation to the walls thereof to define an annular space communicating with a compressed gas source prevent self-compaction of the powder. A non-return valve is mounted in the batcher passage in the portion thereof connected to the hopper to close the passage in case of back impact from the explosion chamber.

Abstract: The combined contact lens is characterized in that it comprises a zone of a hydrophilic material, an aperture in the center of said zone, and a solid body from an optically transparent material fixed in said aperture, said solid body being made in the form of a rod bonded chemically with said zone.In the method for the manufacture of the combined contact lens, a hydroxyl-containing monomer is polymerized in the presence of an agent initiating polymerization, a solvent, and a linking agent, inside a mould provided with a rod located in the center of the mould and made from a polymer that is inactive toward water but swells in the solution of the starting hydroxyl-containing monomer.The invention provides good toleration of the lens with the patient and ensures optimum optical effect with various abnormalties of refraction and in various pathological states of the cornea.

Abstract: The electrochemical sensor of hydrogen and hydrogen-containing reducing agents comprises a cathode which is coal activated with a selective organic catalyst for electrochemical reduction of oxygen, an anode based on the metals of the platinum group and an acidic polymeric electrolyte disposed therebetween. The proposed sensor is capable of operating in a mixture of oxygen with hydrogen or a hydrogen-containing reducing agent without separation of the components. The sensitivity of the sensor to hydrogen is 10.sup.-3 to 10.sup.-4 percent by volume.

Abstract: An apparatus for effecting impregnation of cermet electrodes of an alkaline storage battery, according to the invention, comprises a tank with active solutions which accommodates a member from which electrode stock members are suspended. The stock members are made as a set of forms, each being used for a band stock to be reeled thereon together with a spacer element. The spacer element is adapted to form an appropriate space between the turns of the band stock.The spacer element is made of individual interconnected frames forming a chain of a specified length and provided with projections on both sides of longitudinal and transverse strips constituting a frame, so as to provide circulation of an active solution between the turns of the band stock.

Abstract: A heat-insulating material comprising from 85 to 98 parts by weight of mineral wool and from 15 to 2 parts by weight of a binder applied onto the wool, which is a modified resol phenol-formaldehyde resin on the basis of phenol, formaldehyde, sodium hydroxide, a water proofing additive which is an individual alkylresorcinol with a number of side chain carbons of 2 to 8 or a mixture of alkylresorcinols, as well as urea, or dicyandiamide, or melamine, the ratio between said components being as follows (parts by weight):______________________________________ phenol 1 formaldehyde 0.74-0.96 sodium hydroxide 0.03-0.05 alkylresorcinol with a number of side chain carbons of 2 to 8, or a mixture of alkylresorcinols 0.075-0.45 urea, or dicyandimaide, or melamine 0.15-0.35 ______________________________________The proposed heat-insulating material features improved adhesion properties, has a reduced water absorption and an increased moisture resistance.

Abstract: This invention has to do with an alarm used by persons engaged in high-risk activities. A can of propellant gas is used in combination with a means to generate a noise signal at approximately 120 decibels. A rotatable shaft is used to connect the pressurized container and the noise generating means during operation of the device. A flutter valve can be used in the noise generating means to produce an intermittent signal.

Abstract: The apparatus features a conveying means with rakes and other blade members for coarse crushing the chips. The conveying means is in the form of a chain conveyor contained in a trough. The members for coarse crushing of the chips consist of inverted L-shaped grapples, the leading edges of which have a curvature, and of blades, the cutting edges of which face the leading edges of the grapples and are provided with a curvature having a radius which is about equal to the radius of the curvature of the leading edge of each grapple. The blades are fitted to the inside surface of the trough, in at least two rows, above a zone traversed by the chain conveyor, so that the grapples pass between the rows of blades. The inverted L-shaped grapples are suitably attached to links of the chain.

Abstract: A vibrator, actuated by a pressure fluid to impart oscillations to a working platform carrying the material being handled, comprises a stationary base on which an elastic member is mounted on the side facing said working platform so as to adjoin the working platform, said elastic member being made as a closed-contour collar having a lateral surface. Provision is also made for a working chamber defined by said base and said elastic member and communicating with a source of pressure fluid. It is the pressure fluid which makes the elastic member oscillate and imparts vibrating motion to said working platform.

Abstract: The measuring portion of a pipeline comprises substantially the same pipe as that forming the mainline. A slot is longitudinally provided in the measuring portion thereof. An orifice plate is inserted into the measuring portion through the slot and is then turned so as to be arranged across the measuring portion. The slot is sealed by means of a special cap plate. Pressure is monitored upstream and downstream of the orifice plate to determine the pressure difference for calculation of the flow rate of the fluid in the pipeline.

Abstract: A protective coating includes fire clay, graphite, water glass, water and alumina-containing material, the ingredients being present in an amount of up to a half the weight of the total mixture. Used as the alumina-containing material are such substances as commercial alumina, abrasive slurry, catalyst wastes from the production of synthetic rubber. The protective coating may also include in its composition a boron-containing material in an amount of from 0 to 10 percent by weight of the total weight of the composition, such as datolite and danburite concentrate, ascharite, boric acid, colemanite, pandermite, borocalcite, boronatrocalcite, as well as soda ash in an amount of from 0 to 5 percent by weight.

Abstract: A device for detecting and indicating pending exhaustion of the fuel supply for an airplane or the like. The device preferably is connected between the fuel supply and the fuel pump of the airplane, and comprises a fuel reservoir bowl, a fuel inlet, a fuel outlet, a float switch above the bowl and a vapor orifice for directing fuel vapors from the upper portion of the reservoir bowl to the outlet. Some fuel passing through the device accumulates in the reservoir bowl and entrained fuel vapors move upwardly and pass through the vapor orifice to the outlet. When the fuel supply is low and more vapor is entrained therein, vapor is trapped in the upper portion of the device and forces the fuel level in the reservoir downwardly which causes the float switch to close a circuit to a low fuel alarm and/or indicator. The fuel in the reservoir bowl can be used for continued engine operation to allow sufficient time for corrective action after low fuel has been indicated.

Abstract: The invention relates to contact shoes secured to ballast weight surfaces adjoining a pipeline, with at least two of said shoes being mounted below the pipeline longitudinal axis. The ballast weights are interconnected above the pipeline by means of an articulated joint and securing means, the latter being mounted above the articulated joint and comprising a resilient distance piece.

Abstract: A read amplifier for storage devices of high and superhigh storage capacity includes two amplifier transistors whose sources are connected to a first control input, while each drain of these transistors is connected to one of two data outputs, respectively, two load transistors, whose drains are connected to a second control input, while each source of these transistors is connected to one of the two data outputs, respectively, two capacitors, each being connected between a third control input and the gate of one of the load transistors, respectively, and two switching transistors each having its drain connected to the gate of a respective load transistor, a first data output having connected thereto the source of a first and the gate of a second switching transistors and a second data output having connected thereto the source of the second and the gate of the first switching transistors.

Abstract: A device for driving screws, rivets and the like is disclosed which has a nozzle consisting of an upper half part and an under half part, which are movable relative to each other. By pressing a lever with a finger of the operator and then releasing it, the nozzle is opened and closed in order to grasp screws, rivets and the like. Between the two halves of the nozzle a center rod extends coaxially with the nozzle; and, by pressing a grip end cylinder of the device, the nozzle is opened and simultaneously the center rod is thrusted towards the tip of the nozzle so that the rivet or the like may be pushed out. Alternatively, by rotating a rotary cylinder of the device while pressing the grip end cylinder, the center rod is thrusted towards the tip of the nozzle and rotated so that the screw may be driven in a work piece.

Abstract: An inflation device for tennis balls and the like wherein a pressure vessel having a resiliently closed discharge valve is provided with an operator fitting on the valve and a hollow impaling element on the operator fitting for passing fluid from the vessel, and an outwardly facing ball seat operatively connected to the fitting for actuating the latter upon depression by a ball on the seat, which ball is simultaneously penetrated by the impaling element for receiving pressurized fluid.

Abstract: A flaskless stack molding machine comprises a frame on which along the production process line a flask molding means and a means for separating flasks from the molds and assembling the molds into stacks are sequentially mounted. The means for separating the flasks from the molds and assembling them into stacks is provided with a stack-assembling bottom carriage mounted for vertical movement on guides attached to the frame and a bottom plate secured over the bottom carriage. The frame also supports a mechanism for transporting the flasks freely placed thereon. The means for separating the flasks from the molds and assembling them into stacks incorporates a top carriage for separating the flasks from the molds, which is for vertical movement on the guides secured on the frame and is arranged between the bottom carriage and the bottom plate. A drive means for vertical motion of the top carriage is secured on the frame and a drive means for the bottom carriage is rigidly affixed on the top carriage.

Abstract: While monitoring the phase state of a material in processes including crystallization from a melt, a photo-optical system is operated to receive the radiation coming from the material being treated, and the amplitude-frequency spectrum of the output electric signal of the photoreceiver of this system is followed. The presence in this signal of a low-frequency components within a range of from 0.5 to 30 Hz indicates that the optical system is located above the molten portion of the material being treated. To utilize this method for monitoring the position of the interface between the solid and molten zones or phases, there is employed a carriage supporting thereon the photo-optical system and mounted for reciprocation transversely of the interface between the liquid and solid phases. The output of the photoreceiver of the photo-optical system is provided with a frequency-amplitude analyzer including a circuit for inhibiting the permanent component.

Abstract: Disclosure is made of a film cryotron comprising a super-conductive ground plane and two superconductive electrodes arranged on said ground plane. The ground plane and electrodes are all insulated from one another. The electrodes are interconnected by an elongated distributed Josephson junction and have input lines and a control line arranged along the Josephson junction and above one of the electrodes. The electrode under the control line is shaped as a strip extending along the Josephson junction. The input line is connected to this electrode at a point spaced from the points at which the control line intersects the boundaries of this electrode and from the ends of the junction at a distance which is greater than the width of said electrode and the depth of the magnetic field penetration into the junction. At the point of connection to the electrode, the input line has a width which is less than that of the electrode.

Abstract: A sand for making cores and moulds which comprises 100 parts by weight of a refractory filler, between 1.0 and 3.0 parts by weight of a binder, and between 0.4 and 2.0 parts by weight of an acid catalyst of crystal hydrate benzene-sulphonic acid in the form of an 80- to 92-percent solution in methyl alcohol.The present invention makes it possible to prepare a sand for making cores and moulds which displays a cold setting rate and strength higher than ever before. The cold setting rate in terms of the time after mixing at which the pattern or corebox can be removed satisfactorily is not over 1 min. and the compression strength of the sand is at least 60 N/cm.sup.2 at the time of removing the pattern or corebox.