An acoustic window intended for land transport vehicles is proposed. Its index of acoustic attenuation differs by no more than 5dB from an index increasing by 3dB per octave from 800 to 2000 Hz, and by 1 dB per octave above this range. The examples are doubled-glazed windows or laminated windows in which the intermediate layer has a high attenuation. It is effective with respect to aerodynamic noi...

A method for preventing the driving wheels of a motor vehicle with a mechanical gearbox from slipping consists of detecting the rate of rotation of the vehicle's engine, the speed of the vehicle, the angular velocities of the driving wheels and the gear ratio engaged, and obtaining corresponding signals indicative of the parameters detected. By means of these signals, the rate of rotation of the d...

A composite tube is described comprising an inner layer and outer layer (2, 4) consisting of fibre-reinforced cured thermosetting resin, the resins of the inner layer and outer layer being cured using different curing agents. For instance the expoxy resin in the outer layer (5) is cured using an aromatic amine as curing agent and the epoxy resin in the inner layer (2) is cured using an aliphatic a...

By means of a trigger signal transmitted from a transmission control 3 to an engine control 2 an adjustment of the engine torque is brought about, which results in a smooth gear change. The gear change is prepared by an exchange of data between the transmission control 3 and the engine control 2 preceding the trigger signal so that even in critical shift ranges, especially in those with a high ten...

A modified polyolefin resin obtained by melt-kneading a mixture consisting of 100 parts by weight of a mixture consisting of (A) 40-99% by weight of a polyolefin resin having a melt flow rate of 0.05-60 g/10 min and (B) 60-1% by weight of a solid rubber having a number-average molecular weight of 10,000-200,000, (C) 0.1-5 parts by weight of at least one compound selected from the group consist...

Alcohols are recovered from aqueous acid solution by permeation of the alcohol through an organic-acid modified polymer membrane. An improved process for the manufacture of alcohols by acid absorption of olefins is also disclosed, the improvement residing in the use of an organic-acid modified polymer membrane to selectively permeate alcohols from the concentrated aqueous strong acid solution ther...

The invention refers to a process of forming shaped articles from starch, which process comprises: (a) heating a composition comprising a pre-processed and essentially destructurized starch/water material, at a water content in the range of from 10 to 20 % by weight based on the weight of the composition to a temperature sufficient to essentially destructure the starch. (b) transferring the me...

The present invention relates to a two stage process for the incorporation of plastic and ethylene-propylene rubber into asphalt. In the first mixing stage, a rubber-rich masterbatch is prepared by mixing asphalt, plastic and the rubber. In the second stage of mixing, additional asphalt is mixed with the masterbatch. The first stage is completed in polymer mixing equipment while the second stage i...

A process for producing pre-expanded particles of a thermoplastic resin, wherein said particles are of a polyolefin obtained by polymerizing an olefin in the presence of a Ziegler-Natta catalyst, and contain not more than 1% by weight of particles of diameter up to 105 mu m and having a particle size distribution represented by: R(Dp) = 100exp[-(Dp/De)] where Dp is300 or more and represents a...

Two sets of strain gauges (9,10) are arranged in a blind hole (8) at a measurement point (3) in the axle (1) within the inner bearing ring (6) around which rollers (4,5) revolve. An overroll signal, indicating working, and an absolute measure of axle load are extracted separately and their quotient is calculated. The calculation provides a stable signal which can be easily identified. Photoelectri...

The desired engine torque is used for adjusting the throttle valve (18). For attaining an increase in engine torque during gear changing, which should be quicker than raising the charge results as follows: Already before the time (T AUF), the desired engine torque should be increased at a time (T VOR). This increases the charge and simultaneously the ignition angle is so adjusted, that a torque in...

The invention pertains to a process for producing heteroepitaxial diamond layers on Si substrates by means of chemical vapor deposition and common process gases, wherein (a) the Si surface is pretreated by creating a vacuum and heating the Si substrate to temperatures greater than 300 DEG C, preferably between 600 and 1100 DEG C; (b) a nucleation phase is carried out with a negative bias voltage...

The invention relates to an apparatus for the defined abrasive surface-treatment of bodies, in particular for bodies consisting of specimen materials, for material-analytical tests to be carried out subsequently, with the aim of producing ground surfaces, in particular angular (bevelled) ground surfaces, free from curvature. The object of the invention is to guarantee in a very simple manner that ...

There are described thermoplastic polypropylene pellets of improved processability containing a free radical source prodegradant which on remelting the pellets by extruding or the like, will react to further reduce the molecular weight as well as the molecular weight distribution of the polymer to a point where high capacity production of quality fibers and extruded products can be obtained. The f...

High strength, substantially linear, highly crystalline, high molecular weight-polyolefin shaped structure having a tenacity of greater than 15 g/den and an initial modulus of greater than 500 g/den by drawing never-processed polyolefin at a temperature of 60 DEG C. to 145 DEG C.; and processes for making never-processed polyolefin and such shaped structures.

An apparatus for the treatment of biological samples comprises: at least one column having an adsorbent layer made of adsorbent that fills a part of said column, and a reservoir forming the other part of said column; at least one vessel connected to said reservoir, said vessel being disposed so as to contain said samples to be supplied to said reservoir and/or media for treating said samples; a me...

The bottle (10) includes a sealing body (153) extending into its neck and mounted on a capsule (150) sitting over said neck. The capsule (150) is an integral part of a conical connecting piece enabling a connection of the Luer-lock type to be made. All these elements are protected by a cap (151). The sealing body (153) is designed in two parts, a head (154) and an annular gasket (155), which do no...

The device comprises a first sleeve (29) at the top of which there is mounted casing (30) of grippers (8) of containerws (1) and which is driven vertically by a cam (37) made on a cylindrical wall (38) concentric with the axis of the machine carousel. A second sleeve (32), crossed axially by the first sleeve (29), is linked to plunger (33) of a cylinder and plunger assembly (14) for liquid product...

Cationic oil in water type bituminous-aggregate slurries capable of being worked are disclosed. The slurries contain a densely graded aggregate, from about 8% to about 20% of an aqueous emulsion based on the weight of the aggregate, wherein the emulsion is comprised of from about 55% to about 65% of bitumen based on the weight of the emulsion, from about 0.5% to about 2%, based on the weight of th...

Coils using SMD technology are wound on ceramic or ferrite formers. Since the dimensions of the winding formers are very small, their production and also clamping them into an automatic winding machine are not without problems. If these formers are produced in a multiple blank, processing is more cost-effective. After separating the blank into strips, said strips can be wound simultaneously and no...