EL PROCEDIMIENTO DESCRITO PREPARA COMPUESTOS DE FORMULA: DONDE Y REPRESENTA HIDROGENO O HALOGENO O UN RADICAL -OALC O -S(O)N-ALC, DONDE ALC ES ALQUILO DE 1-6 ATOMOS DE CARBONO Y N ES 0, 1 O 2, Z REPRESENTA OXIGENO O AZUFRE, Y R REPRESENTA ALQUILO, ARILO O UN GRUPO HETEROCICLICO, SOMETIENDO UN ACIDO DE FORMULA DONDE Y, R Y Z SON COMO ANTES, O UN DERIVADO FUNCIONAL DEL MISMO, A LA ACCION DEL ALCOHOL...

PROCEDIMIENTO DE PREPARACION DE ESTERES DE ACIDOS CARBOXILICOS INSATURADOS. LA INVENCION SE RELACIONA CON UN PROCEDIMIENTO DE PREPARACION DE ESTERES DE ACIDOS CARBOXILICOS INSATURADOS DE FORMULA GENERAL (I), DOTADOS DE UNA ESTEREOCONFIGURACION LE,4E (EN CUYA FORMULA X REPRESENTA HIDROGENO, ALCOXI C1-4 O HIDROXILO Y R REPRESENTA ALQUILO C1-4), QUE COMPRENDE LA REACCION DE UNA SAL DE FORMULA GENERAL...

1527167 Data storage TELEFONAKTIEBOLAGET LM ERICSSON 24 Sept 1976 [29 Sept 1975] 39859/76 Heading G4A The clocking of data through a series of registers is checked by monitoring the propagation of a marker bit through a chain of bistables, one bistable for each register, the absence of one or more clock signals preventing the marker bit from propagating through the chain. The bistables may be spar...

A down-hole signal transmitter for a mud pulse telemetry system comprises a flow constrictor defining a throttle orifice for the mud flow, a throttling member displaceable to vary the throughflow cross-section of the throttle orifice, and a pump for displacing the throttling member against the mud flow in order to modulate the mud flow. The displacement of the throttling member is controlled by a ...

The invention relates to alkali metal silicate binder compositions, particularly for use in the production of foundry moulds and cores. The binders of the invention are in aqueous solution and are obtained by mixing: (i) an alkali metal silicate, (ii) a substantially water soluble carbohydrate selected from glycans; glycan oligosaccharides; glycanitols; glycanitol derivatives of oligosaccharides; ...

A process for preparing pulverulent ethylene homopolymers or copolymers with a grain size of less than 200 mu m which comprises contacting coarse-particled ethylene homopolymers or copolymers in the form of a suspension with an aliphatic ketone containing 3 to 10 carbon atoms, heating the same with a mixture of said ketone up to a temperature above the softening point of the polymer and thereafte...

The object of this device is to simplify and reduce the cost of the original assembly and/or the optional mounting of a controlling or limiting device associated with a differential mechanism whose output elements are connected to coaxial wheel shafts. This result is obtained by providing interengaging splines (16, 26) provided on two of the input and output elements of the differential, these spl...

Pressure-dependent anisotropic behavior is provided by a size selective separation membrane system comprising at least two successive porous layers. The first layer comprises a soft, elastic, effectively porous material, and the second layer comprises a substantially rigid porous material. When positive pressure presses the first layer against the second layer, the second layer serves as a rigid s...

LUMINARIA, PRINCIPALMENTE HALOGENA Y DE MUY BAJA TENSION, QUE COMPRENDE UN SOPORTE DE VOLUMEN REDUCIDO AL MINIMO Y QUE ESTA FORMADA POR CONJUNTOS DE FIJACION ESTACIONARIOS U ORIENTABLES Y POR PIEZAS DE CABLEADO ELECTRICO, ESTANDO LA LUMINARIA PROVISTA ADEMAS DE UN ELEMENTO (1) QUE SOPORTA, AL MENOS, DOS PLACAS (2 Y 3) AMPLIAMENTE SOBRESALIENTES CON RESPECTO AL SOPORTE E INTERCAMBIABLES CON O SIN E...

In a double-walled tank for low-temperature liquids, such as a liquid gas, an inner tank forms a primary safety casing while an outer tank, enclosing the inner tank, forms a secondary safety casing. The inner tank includes a base and an upwardly extending side wall with at least the base being formed of metal. Preferably, the outer tank is formed of reinforced concrete. A thermal insulation layer ...

PURPOSE:To protect an insulation layer against influence of the tank interior's expansion and contraction owing to reception and sendout of the liquid to be stored by providing a ring-shaped space for maintenance between the new-erected tank exterior and the tank interior which functions as a primary barrier. CONSTITUTION:All parts of an oild double construction low-temperature tank made in metal ...

A mat made of polyvinyl acetate, fillers and additives which can be matched to the shape of a backing plate to be insulated and can be adhesively bonded thereto has both good airborne sound-insulating properties and good structure-borne sound-reducing properties if the mat (2) contains at least 50% by weight of inorganic, preferably pulverulent inorganic fillers, a density of at least 2000 kgm<-3>...

A method and a particle cooler for controlling the cooling effect in a circulating fluidized bed reactor. The method comprises regulating heat output from the particle cooler by varying the particle level in the cooler. The particle cooler is mounted in a fluidized bed reactor having a particle flow restrictor with fluidizing means between the flow restrictor and reaction chamber and provides the ...

A one-piece or unitary synthetic plastics pallet, in particular suitable for crates, comprising an upper deck (2) and a lower deck (3) connected thereto by means of spacers (4). The upper deck is substantially closed and the spacers consist of tubular members that are open at the side of the lower deck and which are positioned between lower deck and upper deck at such an interspace that from any o...

PURPOSE:To operate a composite system with high efficiency by forming a batch processing program into an information block via a batch interface program and realizing an access to a data base from both calling and called sides. CONSTITUTION:A batch program 3b turns a processing request given from a batch program 2a into an information block to which an on-line system 1 can refer. This information ...

PERFECCIONAMIENTOS INTRODUCIDOS EN LOS PROCESOS DE FABRICACION DE ARTICULOS CONFORMADOS A BASE DE CEMENTO REFORZADO CON FIBRAS. ESTOS PROCESOS COMPRENDEN LA PREPARACION DE UNA SUSPENSION ACUOSA DE FIBRAS REFORZANTES, FIBRAS DE RETENCION LIGANTE INORGANICO, ADITIVOS INORGANICOS PARA MEJORAR LA FILTRACION, FLOCULANTES O DISPERSANTES, SEGUIDA DEL CONFORMADO EN HUMERO DE LOS ARTICULOS Y EL CURADO DE L...

The present invention relates to a digital interactive communication system accessible to a plurality of subscribers who can select by means of their touch-tone telephones any of a plurality of pre-recorded video presentations representative of products and services for sale. In this system, the subscriber requests are received by a voice network interface which is coupled to a local area network....