The invention relates to a test circuit for the amperometric determination of the current flowing through a sensor (41). The circuit comprises a current source (V+, 46) for passing a direct current through the said sensor, switching means (45) for selectively controlling the said current source, means of comparison (42) for comparing the potential difference (VBS) across the terminals of the said ...

Said use is characterized in that the cited membranes are placed adequately in the dropper of the dose dispensor and are used to achieve the selective flow of essentially all the active product and the selective retention of essentially all the preservative during pharmacological treatment. The membrane (5) is coupled between the cylinder units (6 and 7) of parts (3 and 4) of the dropper, remainin...

A swivellable fitting assembly has a housing with a stem with a rotatable nipple on the stem. The rotatable nipple is sealed and spaced from the nipple to enable rotation of the nipple or housing with respect to one another.

In this process for the production of gaseous oxygen under high pressure by air distillation in a double column (7), pumping (at 12) of liquid oxygen drawn from the low pressure column vessel (9), and vaporisation (at 6) of the compressed liquid oxygen by heat exchange with air pressurised to a high pressure, all the air to be distilled is compressed to the high air pressure, the excess fraction o...

PCT No. PCT/FR94/00311 Sec. 371 Date Jan. 30, 1995 Sec. 102(e) Date Jan. 30, 1995 PCT Filed Mar. 22, 1994 PCT Pub. No. WO94/22779 PCT Pub. Date Oct. 13, 1994The invention relates to a method for fabricating laminated glazing comprising at least one enamel layer, wherein is deposited an enamelled composition comprising an anti-adhesive frit, a medium and, optionally, a low melt point frit on a port...

A dulled stretched molding of at most 30% in gloss value, which is useful as a general-purpose packaging material, printing paper, tracing paper, etc., is produced from a coposition comprising 100 parts by weight of a propylene-ethylene block copolymer and 3 to 40 parts by weight of a cyclopentadiene type petroleum resin having a ring and ball softening point of at leat 160 DEG C, by the stages of...

Un processo per la produzione di un polimero espanso comprende le fasi di: miscelare in un dissolutore una miscela costituita da almeno un isocianato e da una prima anidride insatura che viene introdotta nel dissolutore allo stato liquido e ad una temperatura relativamente elevata; raffreddare progressivamente detta miscela in continua agitazione fino al raggiungimento di una temperatura non super...

Procedimento per la produzione di particelle espandibili di polimeri stirenici consistente nel sottoporre dette particelle ad una parziale perdita dell'agente espandente effettuata in stufa ad una temperatura inferiore a quella di transizione vetrosa (Tg) delle particelle.; Described is a process for producing foamable particles of styrenic polymers in which said particles are subjected to a parti...

Si descrivono composizioni contenenti agenti addensanti sotto forma di dispersioni di sali solidi di metalli alcalini o di alcanolammine di polimeri o copolimeri dell'acido acrilico in acidi grassi alifatici, un procedimento per la loro preparazione e dei metodi per il loro uso come agenti addensanti nell'industria chimica, farmaceutica, cosmetica, cartaria, tessile.; Compositions containing thick...

High viscosity cellulose ether products are produced by grinding in a high speed air swept impact mill, a substantially dry, high molecular weight cellulose ether having a viscosity greater than 100 Pa.s (100,000 cps) at 20 DEG C. These products have several times the intrinsic viscosity of a product of substantially equivalent particle size obtained by ball mill or hammer mill grinding.

An improved process for removing dissolved metals from waste water using a recycle high density sludge is described. Specifically, the process comprises the steps of: (1) treating waste water containing dissolved metals with a recycle stream containing alkaline surface active recycle particles to precipitate the dissolved metals on the surface of the recycle particles; (2) treating a portion of th...

Dynamometric measuring assembly for a drill pipe, formed by a measuring device comprising, firmly attached to the rotating pipe, sensors and a first electronic circuit for conditioning the signals supplied by these sensors, a radiotransmitter mounted in a fixed manner on the rotating pipe and an acquisition unit. According to the invention, the measuring assembly furthermore comprises a radio rece...

Method for making carbon composite components (1), having an edge (2) and a central part (3), comprising at least one layer (4) of carbon/carbon composite and at least one layer (5) of recompressed expanded graphite, characterised in that, with the aim of obtaining an impervious carbon composite component (1) with a central part (3) having a high degree of deformation and/or with an edge (2) permi...

A pipe assembly for use in production or drilling systems comprises a plurality of pipe members connected together in end-to-end relationship and a plurality of tubular conductor members electrically connected together in end-to-end relationship. The members have co-operating tapered or stepped portions, and/or screw-threaded portions whereby the pipe members support the conductor members in inter...

The present invention relates to a method for forming the LCP composite having LCP fibers dispersed in the matrix resin even if the LCP content may be smaller than the lower limit of the fiber formable range. The method is characterized in that a resin composite reinforced by the LCP fiber in a mixture ratio beyond the fiber formable range or the preferred fiber formable range by means of an extru...

The centrifugal drum, for the sepn. of a fluid mixture, has radially outwards recesses (9) at the inner dia. of the control disc (6). The total length of the crossing edge forming the effective contour of the recesses (9), at the radial outer ends, is significantly smaller than the effective circumference forming the crossing edge of the control disc (6) at the inner dia..The width of the recesses...

The add-on control device has a housing (16) open on one side which is attached to the housing block (10) of a hydraulic unit. In the housing (16) of the control device there is an electronic circuit, especially a final power stage, on a conductive film (26). The conductive film (26) is designed and constructed in such a way that direct contact with the connecting pins (22) of the magnetic valves ...

Bead-form, expandable styrene polymers containing a) from 5 to 100% by weight, based on a) and b), of a styrene- alpha -methylstyrene copolymer b) from 0 to 95% by weight, based on a) and b), of polystyrene and/or of a styrene copolymer other than a) where the alpha -methylstyrene content is between 0.003 and 1.2% by weight based on the sum of a) and b), c) from 1 to 10% by weight, based on a) ...

Thermoplastic synthetic resin moulding compositions based on mixtures of ethylene-vinyl alcohol copolymers and thermoplastic synthetic resins as a mixture component are used to produce oriented films and packaging materials, for example shrink bags.