A spectrophotometer obtains transmitted, reflected, or radiated light from at least two measuring points on at least one object and a spectroscopic light disperser disperses the obtained light spectroscopically to measuring cells for electrically indicating the spectrum of the obtained light, whereby the spectrum may be analyzed for indicating optical properties of the object at the measuring poin...

A method of bonding a fluoroplastic material to a preselected surface of a metal substrate is disclosed. The method comprises: providing a flexible film, tape or sheet comprised of a fluoroplastic material which expands when heated; etching one side of the fluoroplastic film, tape or sheet; providing a flexible adhesive laminate having a surface layer comprised of a thermosetting adhesive film adh...

A high temperature, flame resistant polyimide foam material and methods of making open and closed cell, rigid and flexible foams from common precursors. An aromatic tetracarboxylic dianhydride is reacted with an amino and an alcohol or mixtue of alcohols to produce an N-substituted imido acid ester. The product is then reacted with an aromatic diamine. The resulting liquid is dried, ground to a co...

Styrenic polymer beads that are useful in forming foamed cups with improved strength and thermal properties are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto an emulsion of a comonomer solution of styrenic monomer and divinylbenzene, which emulsion also contains free-radical-producing catalysts, and the suspension with added monomers is heated to co...

Disclosed herein are a shaped article of vinylidene fluoride resin having an inherent viscosity of 0.85 to 1.4 dl/g, Huggins' constant of not more than 0.45, an average length of crystals in the direction of oriented molecular chains of the resin of longer than 200 ANGSTROM , a birefringence of not less than 30x10-3 and a Young's modulus of not less than 450 kg/mm2 and a process preparing the shap...

A packaging shrink film consisting essentially of a random copolymer of propylene and an alpha -olefin having 4 or more carbon atoms or a random copolymer of propylene, an alpha -olefin having 4 or more carbon atoms and ethylene, said random copolymer satisfying the following conditions: (1) the content of an alpha -olefin having 4 or more carbon atoms in the copolymer is 8 to 30 mole %, (2) th...

A measuring tool for producing geophysical measurements within a borehole comprises a crawler belt, at least a portion of which constitutes a support for a transducer. The crawler belt is continuously displaced within the bore hole by means of a suspension cable and guide pulley in cooperating relation with spiked shoes and retaining plates for maintaining at least the transducer-supporting portio...

Fibre-reinforced foam bodies, in particular those which have a high fibre content (15-30% by weight or more), are produced by dispersing fibres in a liquid, generally water, together with surfactants and gases or gas- evolving agents, fillers, etc., and, in addition, by adding substances which increase the viscosity of the liquid such that it is not less than 40 cP at least during the foaming stag...

Fibre-reinforced foam bodies, in particular those which have a high fibre content (15-30% by weight or more), are produced by dispersing fibres in a liquid, generally water, together with surfactants and gases or gas- evolving agents, fillers, etc., and, in addition, by adding substances which increase the viscosity of the liquid such that it is not less than 40 cP at least during the foaming stag...

METHOD OF FIRING PERFORATING GUN AND SIMULTANEOUSLY RECORDING DOWNHOLE PRESSURE A casing type jet perforating gun is located downhole in a cased borehole adjacent to a hydrocarbon containing formation. A gun firing head is connected to the uphole end of the casing gun. A capillary tubing is wound on a large reel, and the lower end of the tubing is connected to support an apparatus for actuating th...

A dirigible drilling head is provided with a hydraulic pulser in its rotating inner tube in the form of a spindle piston which can obstruct the flushing medium passage and is displaced by a hydraulic circuit including a hydraulic valve. The hydraulic valve is in turn actuated by a miniature electronic circuit so that a variety of input parameters from respective sensors can be delivered to the cir...

Low density foams are prepared from an admixture which comprises an unsaturated polyester resin, a free radical initiator which initiator is activated at temperatures from about 100 DEG to about 400 DEG F, and a compound selected from a t-alkylhydrazinium salt or a carbonylhydrazine. The low density foams have uniform cell structure without cracks or voids and the process is efficient.

Closed-cell crosslinked sponges of varying densities are prepared from an admixture of a vulcanizable elastomer, vulcanizing ingredients selected from sulfur or sulfur donor compounds together with metal oxides and/or sulfur vulcanization accelerators and a t-alkylhydrazinium salt and/or carbonylhydrazine. The crosslinked sponges have uniform cellular structures and are easily prepared with the de...

A fuel composition for spark-ignition engines consisting essentially of gasoline and a barium compound in an amount of 100 ppm or more in terms of barium metal and relative to the gasoline, said barium compound being selected from the group consisting of a barium sulfonate, a barium naphthenate, a barium alkylsalicylate and a barium alpha -alkylalkane monocarboxylate. Spark-ignition engines utili...

A process is provided for preparing cellulose pulp by delignification of lignocellulosic material, which comprises subjecting particulate lignocellulosic material in a pulping zone to the pulping action of a pulping liquor at a temperature at which pulping reactions leading to formation of cellulose pulp proceed, and substances having a molecular weight above about 3500, preferably above about 200...

Cesium is recovered from cesium alum, CsAl(SO4)2, by a two-reaction sequence in which the cesium alum is first dissolved in an aqueous hydroxide solution to form cesium alum hydroxide, CsAl(OH)3, and potassium sulfate, K2SO4. Part of the K2SO4 precipitates and is separated from the supernatant solution. In the second reaction, a watersoluble permanganate, such as potassium permanganate, KMnO4, is ...

A differential gear assembly comprises first and second shafts (11 and 12) carrying respective first and second driving bevel gears (18 and 19) for rotation therewith. A rotatable carrier (13) has mounted thereon two pairs of differently dimensional idler gears (14, 20 and 15, 21) rotatable with respective lay-shafts (16 and 17) about a fulcrum axis (F). The larger idler gears (14 and 15) engage t...

Medical devices for the sutureless repair of lacerated, severed, or grafted nerves comprising longitudinally-openable, porous, rough-surfaced tubes of a body-absorbable polymer are disclosed. The tubular devices of the invention are prepared by sintering or otherwise bonding together granules or fibers, or melt processing suitable polymers in the form of the desired device.

Organic esters of chlorine-containing or bromine-containing phosphorus acids and BIS-GMA, as well as organic esters of phosphorus acids having chlorine or bromine bonded directly to phosphorus, the organic radical of said esters containing at least one polymerizable functional group. Also described are dental liner, restorative, composite, and adhesive compositions containing such organic esters, ...

The invention is a flexible mask for use in charging a flowable material into selected cells of a honeycomb structure and is of particular utility in chraging a sealing material into the ends of selected cells of such a structure during fabrication of solid particulate filter bodies and other selectively plugged honeycomb structures. The mask has a central body with a set of openings extending the...