A broken end of yarn E and an end of thread D are caused to move simultaneously opposite to one another and, after the ends of yarn and thread are brought close together, they are caused to deviate from the path of their initial movement and to run at a distance from one another in such a manner that during the untwisting of the end of yarn it engages the end of thread to form a knot. The piecing ...

Novel x-ray contrast agents, i.e., N,N'-bis(2, 3-dihydroxypropyl)-5-N-(2-hydroxyethyl)glycolamido-2,4,6 triiodoisophthalamide.

A method of producing a heat-shrinkable elastomer comprising the steps of: (a) without the application of external heat, extending an elastomer comprising a copolymer of alternating polyamide and polyether repeat block polymer segments to an extension beyond that at which permanent deformation occurs thereby to orient said elastomer uniaxially, and (b) subsequently releasing the tension on said el...

A centrifuge rotor is provided with a plurality of cavities having a non-circular cross-section for receiving mating multi-angle adapters, which may be inserted in the cavities with selected rotational alignment about the cavity axes, to determine a plurality of select angle receiving chambers in the rotor for sample containers.

A safety ski binding having a jaw for holding a boot on a ski and permitting lateral release of the boot, an elastic system for biasing the jaw longitudinally forward against lateral pivoting, and a mechanism for compensating for the additional bias against lateral pivoting arising from friction between the boot and the ski during a forward fall. The compensation means includes a sensor which prod...

The foil welding device for welding thermoplastic foil bags in its upright position enables the hanging of the bags onto the suction nozzle whereat the bag can be filled with food and thereafter air can be sucked therefrom and it can be welded, while in lying position the device is provided for welding bags from which air need not be sucked.

There is disclosed a new and improved frequency modulation system and method for providing a frequency modulated signal which varies in frequency from a center frequency in response to the amplitude of an analog modulating signal. The system and method utilizes a frequency shift synthesizer to provide the frequency modulated signal and digital techniques for quantizing the amplitude modulating sig...

Apparatus for detecting the presence of a specific substance in a gas stream comprises a sensing chamber (10) receiving a test paper (16) which is subject to colouration when contacted by a specific substance in a gas in the chamber (10), means (24,26,28,30,32, 34) generating a light beam and directing it toward the test paper (16) in the chamber (10), a light beam sensing device (42) responsive t...

A pneumatic tire whose inner wall is provided beneath the crown with a lining which extends at least from one shoulder to the other of the tread and comprises a layer of a sealing mixture capable of flowing into a puncture hole, the layer being covered radially inward by a vulcanized elastomeric partition, is improved due to the fact that the layer of sealing mixture has a base of at least one ela...

The sole support (13) of the front safety jaw has a pedal (16) engaging under the front region of the ski-boot sole (17) and is provided with lateral guide jaws (14). The guide jaws (14), which stand parallel to each other, rest laterally on the ski-boot sole (17) and serve as dogs. They prevent the pedal (16) from being able to twist within the resilient region under the ski-boot sole (17). The s...

Relatively long metal microfilaments made from film forming metal material are described. The microfilaments can be used to make superior high strength structural materials and/or can be used as reinforcing materials in plastic and rubber compositions. The microfilaments are made by forming a liquid film of molten film forming metal material across a coaxial blowing nozzle 5, applying a blowing ga...

The present invention relates to novel mixtures based on fatty diamines used for the preparation of surface active agents intended for the preparation of emulsions of hydrocarbon binders, wherein the fatty diamines of said mixtures have the formula: in which R is a saturated or non-saturated alkyl radical having from 8 to 22 carbon atoms, and 2

A continuous process for producing a self-supporting glucan film, comprises casting an aqueous glucan solution on the surface of a corona-treated endless heat-resistant plastic belt, drying the glucan solution thereon while heating, and releasing the resultant self-supporting glucan film therefrom. Suitable glucans are those which substantially consist of repeating maltotriose units, such as pullu...

A polyimide and a process for its preparation wherein the polyimide is prepared from reaction of an organic tetracarboxylic acid or derivative thereof with a mixture of an aromatic diamine and an amine-terminated butadiene-nitrile copolymer. The polyimides of the invention are particularly useful in the preparation of flexible foams.

In a pressure transducer of the piezoelectric type, a resonator (10) is made up of a pellet (16) mounted inside an element designed to be subjected to the action of a pressure on its exterior face (18). The pellet (16) and the element (12) are cut in the same quartz block, using a cut which provides two vibration modes. The forces resulting from the external pressure are transmitted to the edge of...

Data are transmitted through a column of drilling mud in a drill string that is being used in drilling a borehole in an underground formation. The data are in the form of pressure waves (such as pressure pulses) and are generated by means of a downhole mud motor that is driven by the drilling mud. The pressure waves are generated by varying the load on the mud motor according to a predetermined pa...

A process for producing a binder (cement) to be used in slurry, mortar, or concrete having a low water-to-cement ratio. As raw-material for the binder is used at least 50% by weight of a hydraulic material, such as slag, technical pozzolanas and/or natural pozzolanas. The hydraulic material is ground to a specific surface of at least 400 m2/kg. To the raw-material is added 0.1 to 5% by weight of a...

A biaxially oriented polyester film is provided, which has a plurality of depressions and a plurality of protrusions on at least one surface thereof, in a configuration such that at least one protrusion exists within each depression or at least protrusion exists in the area where two or more depressions are contiguous to each other depressions having an area fraction of from 1x10-3 to 6x10-1. The ...

A fluidized bed reactor and operating process is disclosed, the reactor including distributor plate means to provide distribution of fluid passing upwardly into a fluidized bed; a mixing chamber positioned below the distributor plate means; fluid entry means, preferably at the base of the reactor, for the passage of fluid into the reactor; flow deflector means associated with the entry means for p...