PURPOSE:To enable a sufficient charging of a lead storage battery to be performed after the battery is left to stand after either discharging or resistance connection by forming a shallow and a deep electric-discharge condition in each positive plate. CONSTITUTION:Cold rolled plates made of an Sb-free alloy, after being punched into a grid-like form, are combined with positive and negative plates....

PHD.79.129 11.6.80 "Device for determining the density distribution in an object" In a device for determining the density distribution on a straight line by means of a narrow penetrating beam, the measuring accuracy for the centre of an object to be examined is increased in that the primary beam is not only displaced perpendicularly to its direction, but is also rotated around a point in this cent...

An acoustic method and apparatus for investigating an earth formation penetrated by a borehole are described. Acoustic transducers are mounted on a tool to accurately determine the distance between a segment of the tool and the wall of the borehole. The acoustic transducers are positioned in such manner that the stand-off distance between individual resistivity measuring electrodes in an array, wh...

The antiknock properties of fuel compositions are improved by adding thereto one or more compounds of the general formula wherein R is a hydrocarbon group, R1, and R2 are hydrogen or hydrocarbon groups and RI and RII are substituted or unsubstituted arylene groups.

Polyurethane foams which may be rendered flame resistant by the addition of flame retardants are produced by reaction between a carbohydrate, a polyisocyanate and water in the presence of a suitable surfactant and polyurethane forming catalyst.

The present invention relates to a method and apparatus for producing a liner of elastomeric material insitu in a pneumatic tire casing.

An organic, high-molecular weight polyester containing substantially chain members of the formula (OXOY) wherein X is at least one member selected from the group consisting of +TR having an inherent viscosity of at least 1.0 dl/g, preferably at least 1.2 dl/g measured at 30 DEG C. in a solution of 0.5 g of the polyester in 100 ml of a mixture of 60% by weight of phenol and 4...

TIRE BUILDING MACHINE DRUM A contractible tire building drum 10 having segmental cylindrical shoulder rings 25,26 with flanges 36 at the ends and a stretchable bladder 27 positioned over and between the shoulder rings 25,26. Each of the shoulder rings 25,26 has a primary set of segments 38 and a secondary set of segments 39 alternately spaced around the ring. The primary and secondary sets of segm...

A portable physical fitness piece of equipment embodying 2 foot stirrups, an anchor, center fist and a teflon covered flexible braided wire bonding anchor and fist. When placed below a bed rail, furniture leg, or between floor and door lower edge (not physically attached by bolts, screws, brackets or other means), designed for the specific purpose of providing means by which the feet of the user (...

Fire retardant, expanded styrene polymer shaped objects are prepared by: (a) mixing styrene monomer or a mixture thereof with at least one comonomer, an expanding agent and a fire retardant, organic halogen compound in a aqueous dispersion; (b) adding to (a) either before or during polymerization from about 0.0001 to 0.1 percent by weight esters soluble in the organic phase of (a), these esters of...

A method of reducing the density of a silicone foam is provided comprising mixing with a foamable silicone composition having a base polydiorganosiloxane, an effective amount of a resinous copolymer selected from the group consisting of resinous copolymers of R3SiO0.5 units and SiO2 units, and ratio of R3SiO0.5 units ranging from 0.25 to 0.8:1, and resinous copolymers formed from R3SiO0.5 units, R...

Improved stability is imparted to suspension and emulsion polymerized dry particulate vinylidene chloride resin by adding thereto a dispersion of an oil insoluble inorganic particulate stabilizing additive in a liquid plasticizer/stabilizer medium with sufficient mixing to ensure generally uniform distribution of the dispersion onto the resin particles. Optionally, a hindered phenol may be incorpo...

A dielectric film with improved dielectric strength, mechanical strength, high temperature utility, and moisture resistance is described comprising the reaction product of 1, 2, 3, 4 butane tetracarboxylic acid, a multifunctional amine of the formula: and at least one diamine, the multifunctional amine constituting at least 5% of the total amine equivalents of the reactants. The polyimide...

Molding compositions for the fabrication of shaped articles having enhanced mechanical properties are comprised of (i) a polymeric matrix, (ii) an inorganic reinforcing filler material therefor, and, advantageously, (iii) a polymer/filler coupling agent, said reinforcing filler material consisting essentially of intimate admixture of enstatite and silica advantageously prepared by calcination of a...

An automatic masking device for use in a printer, wherein a reproduction picture to be projected onto a photosensitive film sheet mounted on a holder is masked by a pair of masking plates which are separated at a certain distance away from the surface of the photosensitive film sheet, and are adapted to be movable over the surface of the film sheet so as to open and close the opening distance betw...

An automatic masking device including an aperture extension means for use in a printer, wherein a reproduction picture to be projected onto a photosensitive film sheet mounted on a holder is masked by masking plates which are arranged in front of the holder, and are adapted to be movable over the surface of the holder so as to open and close an aperture between the masking plates, and which are ad...

Molding compositions for the fabrication of shaped articles having enhanced mechanical properties are comprised of (i) a polymeric matrix, (ii) an inorganic reinforcing filler material therefor, and, advantageously, (iii) a polymer/filler coupling agent, said reinforcing filler material consisting essentially of intimate admixture of enstatite and silica advantageously prepared by calcination of a...