Fluoroaliphaticsulfonamido derivatives of poly(oxyalkylene) diamines are described which are useful as antistatic agents. For example, they are useful in imparting antistatic characteristics to plastic films and the like for packaging electronic components.

PURPOSE: To discriminate a faulty interface unit without changing the output state of a correctly operating unit by inverting the input state of the interface unit having a faulty state. CONSTITUTION: If a fault occurs in one of interface units 30a to 30n, a fault display signal appears in a fault display output 35 of the faulty unit and is supplied to an interrupt input PINT or a microcomputer un...

A method and device for carrying out operations and/or manipulations in a well which has a casing with the well being and drilled in geological formations having at least two distinct zones. The device according to the invention is characterized in particular by casing (3) having, in its interior, a first connector (10) usable in a liquid medium, the first connector being connected by lines (40) t...

A brake cylinder, especially for rail vehicles, with a simple-acting linkage regulator for maintaining a uniform play between the brake surfaces. A nut that is disposed upon a threaded spindle is connected with first coupling surfaces that cooperate with second coupling surfaces disposed on the piston of the control or operating cylinder. A coupling element that is provided with the first coupling...

Porous membrane is made of polyvinylidene fluoride and has a finely porous surface. A surface treatment is applied to render the porous surface uniformly hydrophilic and the reflection spectrum of the surface in this visible region is specified to be the same before and after the surface treatment. In the surface treatment, oxidising agents introduce polarising gps. into the molecule so that the p...

Precipitation (conversion) of dissolved heavy metals in waste effluents is achieved with the addition and mixing of a solution of sodium polythiocarbonate with a solution containing dissolved heavy metals. The solution of sodium polythiocarbonate has been pH buffered to a pH of 12.5 or less in the manufacturing process. Precipitation of the dissolved heavy metals with the buffered sodium polythioc...

Cured polyimide foam is exposed to an atmosphere of steam at elevated temperature and pressure for a period of time sufficient to convert the foam into a non-flexible, non-resilient recurable cellular material. Preferably the process is conducted such that the cellular material is recurable to a flexible resilient foam having tensile strength properties similar to the tensile strength properties o...

Cured polyimide foam is exposed to an atmosphere of steam at elevated temperature and pressure for a period of time sufficient to convert the foam into a non-flexible, non-resilient recurable cellular material. Preferably the process is conducted such that the cellular material is recurable to a flexible resilient foam having tensile strength properties similar to the tensile strength properties o...

Described is a process for producing, in particulate form, aromatic polyimides based on one or more 2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropanes. The process involves forming, heating and agitating in a medium composed of dipolar aprotic solvent and liquid aromatic hydrocarbon solvent, a homogeneous solution of a polyamic acid derived from a substantially equimolar mixture of (i) an aromatic ...

A switching network where a large class of combinatorial designs which are well known in the mathematical literature are for the first time applied to advantageously define the pattern of permanent connections effected between network input channels and initial network crosspoints, illustratively by a connection arrangement of a two-stage, rearrangeable network. The class of combinatorial designs ...

In an optical system for recording information on an erasable recording medium, first and second pulse recording laser beams can be emitted from a laser unit. The first laser beam is converged by an objective lens onto a recording layer of an optical disk to form a permanent recorded region on the recording layer. The second laser beam, which has a lower intensity than that of the first laser beam...

PURPOSE:To make the external form of a DC machine miniaturized by rotatably pivoting a rotating drum, over which an armature coil is wound to fix, between poles and an armature static iron core and by switching the direction of current flowing to the armature coil in synchronization with the rotation of the rotating drum. CONSTITUTION:When current is passed to a field coil 8, magnetomotive force i...

PURPOSE:To enhance the pinning effect of a flux and to suppress the lowering of critical current density even in a magnetic field by heat-treating a molded body of specified metal oxides and carrying out slow cooling in the air. CONSTITUTION:Powders of oxides of Lu, La, Ba, Ca and Cu are mixed so as to render a compsn. consisting of, by atom, 2-5% Lu, 2-5% La; 6-12% Ba, 6-12% Ca, 20-25% Cu and 49-...

PURPOSE:To enhance the orientability of the crystals of a thin superconducting oxide film and to make it possible to allow electric current to flow in the surface of the film at high critical current density by growing the film on a substrate while impressing a magnetic field in a direction perpendicular to the surface of the substrate. CONSTITUTION:A thin superconducting oxide film is grown on a ...

Apparatus for producing superfine powder in spherical form with a diameter of about 5 to 30 microns in a laval nozzle system. The material to be powdered is melted in a crucible, and is then superheated after it emerges from the crucible.

A process for the waste treatment of metal plating solutions, and a module for use therein. A pre-plumbed module filled with seeder and pH adjustor solution for shipping is connected to the growth tank of a plating line and excess solution is introduced into the module where metal values are removed.

A method and article useful for preparing stable polysaccharide gels from aqueous solutions of water-soluble polysaccharides bearing pendant carboxylate groups. The gels produced may be of the foamed or nonfoamed variety.

Clusters of water-swellable polymer fines, having high rates of absorbency without gel-blocking are prepared by suspending water-swellable polymer particles in an inert hydrophobic liquid, such as hydrocarbon, and slowly adding to the particles an aqueous solution, which can be water or an aqueous solution or mixture of water-soluble monomer and silica or a similar compound to silica. 36,761-F

The process prevents water solubilization of alcohols, on their own or in a mixture with hydrocarbons, because of the presence of formation inhibitors of hydrogen bonds in alcoholic and/or hydrocarbon and/or water phase, in order to exploit the octanicity and the low emissions of alcohols and thus formulate a new type of unleaded gasoline.

A dual-permeability magnetic core structure is provided for use in small, high-frequency inductors and transformers. The dual-permeability corer encloses a winding window containing planar windings and comprises high-permeability and low-permeability sections positioned to produce a highly uniform, or uniformly varying, magnetic field on the winding surfaces. The dual-permeability core produces lo...