Epurateur centrifuge pour flux gazeux et procédé appliqué dans cet épurateur Une veine gazeuse périphérique d'un flux gazeux chargé est concentrée en particules dans un tronçon de décantation (38) d'une chambre de centrifugation (2). Elle est ensuite arrêtée dans sa progression longitudinale dans un tronçon de séparation (40) dans lequel sa pression est rendue suffisamment élevée, par entraînement...

Compositions containing nonfibrous calcium sulfate in hemi-hydrate or anhydrous form and fibrous additives, including paper fibers preferably derived from waste newspaper, capable of being formed into an unfaced building material having superior mechanical properties and/or fire resistance.

07-27(631)A SYNTHESIS OF NOJIRIMYCIN DERIVATIVES Nojirimycin .delta.-lactam and deoxynojirimycin are each synthesized from 5,6-anhydro-3-O-benzyl-1,2-O-isopropylidene-L-idofuranose as a divergent intermediate by a method which comprises formation of the piperidine ring by connection of nitrogen between C-1 and C-5 with inversion of configuration at C-5 to form nojirimycin .delta.-lactam or between...

Apparatus and method are disclosed for fusion joining first and second axially abutted thermo-plastic piping system component connection ends that are in axial and circumferential alignment. The joining apparatus includes apparatus for enabling the heating of a melt region in the proximity of the interface of the first and second piping system component connection ends at least to the material sof...

A method of producing a composite comprising a self-supporting polycrystalline material obtained by oxidation reaction of a molten parent metal (2) with a vapor-phase oxidant comprising infiltrating a filler (3) exhibiting inter-particle pore volume with a parent metal (2) under conditions which control the respective rates of said metal infiltration and said oxidation reaction.

A support apparatus for tubes in a U-bend portion (44) of a tube bundle (38). The support apparatus includes a U-tube ring (72) positioned around the tubes in the U-bend portion (44) and having first and second tube separation elements extending therefrom through first (80) and second (82) lanes between the tubes, respectively. The first tube separation elements are preferably characterized by fla...

2066182 9105812 PCTABS00005 Imide-containing polymers of styrene-type monomers are prepared by a process comprising solution polymerizing under free radical polymerization conditions a polymerizable monomer composition comprising at least one vinylaromatic monomer and at least one maleamic monocarboxylic acid monomer.

A steel cap for steel sets in mining support structures is made of a hollow sectional profile having a certain length. A tip is arranged as an insert at one end of the sectional profile. A fork is arranged as an insert at the other end of the sectional profile. Each insert is formed as a plug-in connection. The plug-in connection is provided with a hold free of play in a correct position. For this...

Device for controlling the throughput of virtual circuits taking an asynchronous time-division multiplexing transmission path, in which the incoming cells of an input asynchronous time-division multiplexing path (mtr), comprising a header containing a destination datum which can be processed like a virtual circuit identity, are routed towards a cell memory (MT) comprising a plurality of virtual ci...

The incoming cells of a input asynchronous time-division multiplex channel (mtr) are counted by a counter (FFB) assigned to each virtual circuit which is incremented on each incoming cell of the virtual circuit and decremented periodically. Clock signals define consecutively numbered cell times (ntc). Queue and chaining table (FAVE, FCVN) define a cell time queue (FAF, FAL, FAV) specific to each o...

Alkyl ethers of polygalactomannans wherein the alkyl groups contain 1 to 4 carbon atoms are further modified with long chain aliphatic epoxides wherein the long chains contain 8 to about 28 carbon atoms. The resulting derivatized polygalactomannans are particularly useful as thickening agents for aqueous systems.

A simplified actuation system for positioning the divergent flaps of a vectorable two-dimensional exhaust nozzle is disclosed. The system includes lever arms having cam surfaces pivotably attached to diverent flap crank shafts. An actuator is pinned to the nozzle sidewall and operably connected to a slider bar which has two cam followers at either end which are fixed with respect to each other and...

A bale opener includes a housing moved along a travelling path, and an opening roll which is mounted in the housing for removing fiber tufts from faces of fiber bales arranged in a series along the travelling path and which has a longitudinal axis lying in a plane oriented perpendicularly to the travelling path. There is further provided a suction device that generates a suction stream within the ...

The operating speed of a processing machine is reduced when temporarily reduced quality of the stock being processed occurs: for example when changing from one roll of wrapping material to another in a packaging machine. For this purpose the start of a processing phase (t1 to t5) of reduced reliability is determined, the operating speed is reduced from this instant to a value (nB*) which, during t...

A method of producing smooth zinc coatings on aluminium substrates comprises forming a zinc or zinc alloy deposit on the substrate and then employing a nitric acid bath containing a source of Group VIII metal ions, eg ferric ions as a zinc remover. Optionally the step of forming the zinc or zinc alloy deposit on the substrate is repeated. The zinc deposit is preferably formed by electroless deposi...

In a process for producing carbon fibres from coal tar pitch, the coal tar pitch is filtered before being spun and the pitch filtrate is distilled in a thin-film evaporator in order to increase its softening point over 260 DEG C. A pure and homogeneous hard pitch is thus obtained, without the re-formation of infusable, chinolin-insoluble components. The most difficult and cost intensive step of t...

2067141 9105604 PCTABS00005 Structural aggregate pigment products with intrinsically built-in functional properties comprising particulate matter treated with complex functional microgels.

2067376 9105745 PCTABS00005 Process for manufacturing of structural aggregate pigment products with intrinsically built-in functional properties, from aqueous dispersions of particulate matter treated with in-situ formed complex functional microgels with rapid formation kinetics.

2042608 9106155 PCTABS00105 Le signal à spectre étalé (S1) est converti en signal binaire quantifié (S2) à un élément binaire, et ce signal binaire est appliqué à plusieurs circuits de détection (10) en parallèle, chacun de ces circuits de détection étant destiné à détecter une position de code distincte. Chaque circuit de détection (10) reçoit simultanément une version décalée d'un code de référe...

A time notarization apparatus and method is disclosed which uses a secure, microprocessor based hardware platform which performs public key cryptographic operations to obtain trusted time stamping with a minimum of intervention by third parties. The hardware platform is encapsulated in a secure fashion so that the device's timestamping mechanism may not be readily tampered with or altered. The har...