A communication system capable of continuously exchanging digital information in a well logging installation between apparatus arranged on the earth's surface and apparatus arranged in an earth borehole, interconnected by a cable. Both the surface apparatus and the downhole apparatus include a controller and a modem for sending digital command messages downhole and digital data messages uphole. Th...

The active substance of the positive electrode of an accumulator cell consists of crystalline and polycrystalline lead superoxide in which the lead has its maximum valency of 4. The polycrystalline lead superoxide is an aggregation of individual crystalline substances which are in different growth and development phases. The active substance is located, as an adhering and permanent coating layer, ...

PURPOSE:To obtain a low cost storage battery by putting a unit battery, of which a lid is thermally welded to an inner battery jar in which a group of electrode plates is inserted, into an outer battery jar composed of corrugated cardboards and modifying materials and structure of the battery jars. CONSTITUTION:A group of electrode plates 6 is integrated together with an acid resistant resin-made ...

PURPOSE:To maintain the fastening force for a long time and to improve the service life of a lead storage battery, by furnishing rib plates opposing to a battery jar at both sides of an electrode group, and fastening both the electrode group and the rib plates in almost a circular form by heat-weldable bands. CONSTITUTION:At both sides of an electrode group which consists of positive electrode pla...

PURPOSE:To maintain the fastening force for a long time and to improve the service life of a lead storage battery, by furnishing rib plates opposing to a battery jar at both sides of an electrode group, and fastening both the electrode group and the rib plates in about a circular form with heat-weldable bands with a specific breaking strength. CONSTITUTION:At both sides of an electrode group consi...

PROCEDIMIENTO PARA SINTETIZARLEVAS PARA FIIJARLAS A UN ARBOL DE LEVAS POR CONTRACCION. COMPRENDE: A) PRENSAR UNA MEZLCA DE POLVO DE HIERRO EXENTA DE NIQUEL Y COBRE CON 0,3% EN PESO DE CARBONO Y CON UN 5% EN PESO DE MOLIBDENO; B) COMPRIMIR LA MEZCLA PRENSADA HASTA UN PESO ESPECIFICO DE 7,2 G/CM3; C) SINTERIZAR LA MEZCLA COMPRENDIDA A UNA TEMPERATURA POR ENCIMA DEL PUNTO EUTECTICO DEL HIERRO Y DEL C...

A size composition is described which is capable of increasing the adherence, and particularly the adherence to rubber, of multifilament yarns having a base of polyester, a base of polymers of high modulus of elasticity, or a base of thermostable polymers, wherein said size composition contains tris(epoxypropoxy 2,3)3-propionyl 1,3,5-hexahydro-s-triazine as preadhering agent, preferably present in...

An apparatus optically reproduces FM electric signals from the recording medium recorded with said electric signals in the form of a change in refraction index. The apparatus is so constructed that a pair of laser beams are incident on the recording medium at substantially the same point with an angle defined between the laser beams; a diffracted light obtained by causing each of said beams to be ...

An antifriction bearing has an inner race with a radially outward extending flange, an outer race, and rolling elements between the inner and outer races. The surface of the outer race toward the flange has a sealing lip, and an annular flexible resilient sealing element engages the lip and extends into sliding contact with the flange. The sealing element is held in place by a cylindrical casing r...

Electronically adjustable position-sensitive radiation detector, focus-error detection system comprising such a radiation detector, and optical read and/or write apparatus comprising such a focus-error detection sytem. A position-sensitive radiation detector (1), which on a plane surface comprises at least two adjacent reverse-biased radiation-sensitive diodes. comprises a bias circuit (20) for es...

Apparatus for use in exercising the abdominal muscles, which improves the physiological effectiveness of the familiar sit-up exercise, is disclosed. The apparatus is comprised of a specially shaped basin which cradles the pelvis while at the same time the lumber spine is supported by a longitudinal support portion. The angulation between the pelvic basin and the lumber support portion is arched co...

PURPOSE:To form dust protective film excellent in protection for contamination and capable of being painted with organic paint or ink, by coating the surface of silicon elastomer with the composition consisting mainly of specifically designed poly(metha)acrylate and volatile organic silicon compound. CONSTITUTION:Polymer A is the solution polymer of (metha)acrylate shown by formula I (R<1> is alky...

PURPOSE:To prevent erroneous operation by a method wherein a conductive material of earth potential is provided on a wiring substrate, and the electrostatic capacity between the conductive wire of a photo-receiving element and a receiver IC and the conductive wire of the receiver IC and an output terminal is reduced. CONSTITUTION:A first wiring substrate 21, and a second multilayer substrate of a ...

The present invention relates to a process for molding a foamed article comprising mixing a polyphenylene sulfide resin with about 0.1 to 10% of an oligomeric sulfone carbonate as a foaming agent and with 0.1 to 2% of a basic catalyst at a temperature of about 150 DEG to 180 DEG C. and then heating the resulting mixture at a temperature of 280 DEG -350 DEG C. to affect a reaction mixture and int...

Disclosed is a primer coating for cycloolefin polymer articles comprising an alkyd resin, a urea-formaldehyde resin, at least one 2-4 carbon alkanol, a nonleafing aluminum pigment and an acid catalyst. A cellulose ester and a solvent for the cellulose ester may also be included. The primer coating prevents migration of antioxidant from the cycloolefin polymer into a subsequently applied topcoat.

This invention is directed to a synthetic rubber-containing skim stock and a product containing the skim stock having improved adhesion between a brassed or zinc coated metal member and contiguous rubber skim stock. The invention lies in the discovery that improved rubber-to-metal adhesion, and adhesion retention, can be obtained by adding to a synthetic rubber-containing skim stock composition ap...

There is disclosed a novel two-cycle engine oil composition comprising a terpene type compound incorporated in a substance selected from the group consisting of a mineral oil, a synthetic oil, a polyolefin and a mixture thereof, the content of the terpene type compound being in the range of 2 to 70% by weight based on the total amount of the composition. The two-cycle engine oil can reduce th...