A fluid pressure operated disc brake having one brake disc affixed to the housing of a brake cylinder unit and the other disc affixed to a service brake piston of the brake cylinder unit, which further includes an auxiliary brake piston between the service brake piston and cylinder head, thereby forming on opposite sides thereof a service brake actuating chamber and an auxiliary brake actuating ch...

Aromatic polymaide film, having an excellent thermal resistance and a high dielectric breakdown strength, which comprises an aromatic polyamide containing repeating units of the formula [ H - Ar1 - CO ] or [ NH - Ar1 -NHCO - Ar2 - CO ] and cross linked with a cross-linking compound having at least one radical selected from R<1> - C(R<2>) = C - CH2(R<1>)-, R1 - C(R<2>) = CR<1>-, R<1> - C(R<2>)...

Published without abstract.

An optical communication system for drill hole logging comprises an armoured cable 58a containing one or more optical glass fibres 23a and 28 inside a tubular moisture barrier, a neodymium laser 21a capable of radiating infrared light into at least one of the glass fibres, a modulator 31 in a downhole cable-head connector shell 10a for modulating light and returning it to the surface, and a semico...

The method comprises a phase for the addition of a setting agent and of water and of natural products from the site where the installation is built, which products are made up of pure clay or of a mixture of products whose main constituent is clay. A mixer is made up of a tank having a concrete base slab (2) from which projects a central block (4) also made of concrete and supporting a cylindrical...

This invention relates to an improved process for the production of a particulate foamable polyvinyl aromatic resin of the type wherein a vinyl aromatic monomer is polymerized in an aqueous suspension system to produce beads of thermoplastic polyvinyl aromatic resin, separating the beads and incorporating a volatile liquid blowing agent in the separated beads at a temperature above the resin softe...

The invention relates to an apparatus for the entrenching of pipes in underwater beds, of the type in which a framework, provided with excavating means, is positioned across the pipe to be entrenched and dragged along the pipe so as to excavate two parallel trenches adjacent to both sides of the pipe, the pipe being entrenched due to the collapsing (either spontaneous or caused by disgregating mea...

A submarine vehicle for collecting and raising materials resting on the sea bed at great depths, of the type comprising a load-bearing structure, collecting elements for the materials, storage silos for storing the materials collected and/or the ballast material, transfer means between said collecting elements and said silos, and main propellers for advancing the vehicle on the sea bed, said vehic...

1. Method for the production of phenolic resin bonded nonwovens, especially as shaped parts, to which a powdered novolak, with hexamethylenetetramine added, is brought into the fibermaterial first, then the web is formed from this and the web is finally subjected to heat treatment, especially in a moulding press, characterized that before heat treatment a substance, splitting off ammonia by heat, ...

Cleaning device for the internal peripheral surfaces of pipelines or hollow cylindrical vessels, including instrument carriers having at least one working head being fixable in a working position and being movable along defined feed paths through the interior of the pipelines or vessels which are invisible from the outside, and instruments mounted on the at least one working head, the instruments ...

An improvement in a fluid flow valve is disclosed. The valve comprises a combination of flexible tubing joined to a tubular member having a membrane closing off the passageway in the tubular member. A pointed spike having at least three radially projecting ribs extending longitudinally is located within the tubing adjacent the membrane and is movable by external manipulation of the tubing whereby ...

A filled-resin dental composite. The filler is a mixture of hydrophobic silica particles about 0.01 to 0.04 micron in diameter and glass particles about 2 to 30 microns in diameter. Preferably, the glass is x-ray opaque. An improved method for restoring carious lesions in a living tooth is presented, using the composite.

PURPOSE:To relax the stress of sealing resin, and to prevent an effect on a semicondutor element by mounting resin for buffer only to the side surface of the element. CONSTITUTION:A circuit surface 5 is used as an upper surface, the resin 4 for buffer is attached to the whole side surface among the surface exposed of the element 1, and the thickness of the resin in the B direction is thinned and t...

PURPOSE:To permit formation of a flow rate measuring section for purifying liquid and the body of a device into one body, by segmenting a treated liquid well for the purifying water from an overflow weir into two compartments, and providing an overflow weir for measuring flow rate and a measuring device for flow rate in the treated liquid well on the down stream. CONSTITUTION:The treated water wel...

An earthmoving machine primarily for land drainage and irrigation purposes has a pivotally mounted boom (8) carrying an arm (12) pivoted at one end to one end of the boom and having a bucket (14) or the like attached at its other end. At the end of the arm which is pivoted on the boom a quadrant (20) is formed around which passes a pendant cable (18) attached to a counterweight (22) which is slida...

(2R,6R)-1-Chloro-2,6,10-trimethyl-undecane I, (R)-(+)- beta -chloro-isobutyric acid II, (S)-(+)-1-bromo-3-chloro-2-methylpropane IV and (2R)-(+)-1-chloro-2,6-dimethyl-heptane V are novel optically active units for the synthesis of the side chain of (R,R,R)- alpha -tocopherol. In the process according to the invention, the optically active C14-chloride I is obtained in 6 simple reaction steps start...

The invention relates to a method and an arrangement for testing the function of integrated circuits, particularly of microcomputer chips, in which method a defined signal sequence at least partially contained in a program memory is applied to the inputs of the integrated circuits (5) to be tested (device under test) and in which the response signals, which can be picked up at the outputs of the d...

Device for hydraulic dredgers for levelling, digging and ripping and for guiding loads or tools, such as drills, pile-driving or pulling tools on a rectilinear constrained path, by means of two arms of equal length which can be moved past one another out of one extended position, via the folded position, into the opposite extended position (Fig. 1). A long constrained path with a constant cutting ...

A detergent composition consisting essentially of a water soluble mixture of higher alkyl glyceryl ether nonionic surfactants having the structural formula where R is a C8-C16 alkyl radical, and n has a value of 1, 2 and 3, with an n distribution of 12-49% n=1 ethers, 24-61% n=2 ethers and 6-59% n=3 ethers.