A rotary bit for oil and gas well drilling has cutting elements set in a hard facing material which in turn is supported by a sintered steel section between the hard facing and the steel base of the bit.

A laminated panel composed of a plastic sheet and a glass sheet bonded to each other through an adhesive layer having a thickness of not more than about 200 microns and composed of a thermoplastic resin having a softening point of less than about 100 DEG C., containing substantially no plasticizer and being plastic at room temperature, said plastic sheet being composed of a resin having a higher ...

PURPOSE:To prevent a work from interruption by steering an unattended moving body so as to be by-passed or backed after once being stopped and then by- passed by output signals from plural obstacle sensors arranged on the front of the moving body. CONSTITUTION:Four photosensors S1-S4 and contact type obstacle sensors 5a-5d are arranged on the front of the unattended moving body. Outputs from the s...

Flexible, resilient, polyurethane foam having improved flame retardancy and intumescent properties is prepared from a reaction mixture comprising a polyether polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a flame retardant, and hydrated alumina. Alternatively, the mixture also comprises a low-viscosity linear polyester. The hydrated alumina is predispersed in a mixtu...

A double row tapered roller bearing that is unitized for handling purposes is suited for installation over the drive flange of a front wheel drive automobile. The bearing includes a double cup, a pair of cones, tapered rollers arranged in two rows between the cup and cones, cages along each row of rollers, and seals at the ends of the cup. The seals have cases which are pressed into the ends of th...

A fluidizable bed combustion chamber comprises an intermediate partition (2,7) which divides the chamber into an upper combustion space (1a) and a lower plenum (1b) and which is provided with means (4,4a,8) for injecting fuel into the upper combustion space in which, during use of the combustion chamber, a bed of fluidized material (6) is created. The intermediate partition is composed of a plural...

In a calcining furnace usable particularly for regenerating sands used in casting boxes and cores, a bed of refractory particles is fluidized by means of a combustible gas which is fed into the bed together with air, so as to enable the combustible gas to burn. The base wall on which the bed of refractory particles is supported has a plurality of holes for the air supply. Each hole for the air sup...

A method for producing a prepreg roving, which comprises impregnating a composition comprising an unsaturated polyester, an unsaturated monomer and a polyisocynate compound in a filamentary reinforcing material, and then heating the impregnated reinforcing material to react the unsaturated polyester with the polyisocyanate compound; and a method for producing a fiber-reinforced plastic article, wh...

New rigid polyvinyl chloride foam having a density of less than 200 kg/m<3> and having a uniform, fine-celled cell-structure consisting of a rigid vinyl chloride homopolymer containing per 100 parts by weight of polyvinyl chloride 0.1-15 parts by weight of a homo- or copolymer of an alkyl methacrylate having an alkylgroup of 1-10 carbon atoms having a viscosity of the solution eta 0.1 of between ...

A silicone elastomeric emulsion having improved shelf life is produced by a method which mixes the ingredients of the emulsion with the exception of a filler other than colloidal silica, then ages the mixture for at least two weeks at room temperature then adds the filler other than colloidal silica. The improved emulsion yields a film upon drying that has better physical properties. The emulsion ...

The present invention relates to a process for the gelation (i.e. thickening) of salt water which includes the steps of forming a solvent system of an organic liquid or oil and a polar cosolvent, the polar cosolvent being less than about 15 weight percent of the solvent system, a viscosity of the solvent system being less than about 100 cps; dissolving a nonionic surfactant and water insoluble, ne...

An electronic cash register includes a mode selection circuit for selectively placing the electronic cash register in a training mode. A memory of the electronic cash register includes an accumulation section for accumulating the transaction data registered in a normal registration mode, and a training mode memory section for storing the transaction data registered in the training mode. In the tra...

A mixture which can be converted to a heat-resistant foamed plastic and which contains a solid blowing agent, a thermoplastic prepolymer of a polyimide of an unsaturated acid, an azomethine and a polyamine. On warming, the mixture gives a foamed plastic of high heat resistance and good resistance to chemicals.

PHO 79/508 In an apparatus with an electric motor, for example a dry-shaving apparatus, citrus press or the like, which comprises two housing shells,of which one shell serves as a mount for the motor, which is positioned on at least one support on this housing shell, there is provided at least one resilient hook which projects from this housing shell in order to secure the motor to the shell, whic...

PHN. 9785 13 In a method of manufacturing an electric discharge device having a pattern of electrodes impressed in a glass plate, starting material for the manufacture of the pattern of electrodes is a metal foil which has a relief pattern. The relief pattern comprises thick portions which are connected together by thin portions of the foil and in which the thick portions constitute the desired pa...

A method and apparatus for vacuum deposition and annealing wherein specimens 18 and 20 of coating material within a vacuum chamber 2 are evaporated by a laser beam 24, while the substrate 16 is scanned by another laser beam 36 to cause localized heating of the substrate and deposited coating materials to an energy slightly below the bonding energy of the coating materials to promote annealing of t...

This modular light-diffusing or reflecting plastic panel, notably for photography, motion-picture and television, comprises a cut panel (1), of semi-rigid material having formed therein by pressing a series of grooves (2, 3, 4), oriented to permit the folding of the panel (1) in different planes in order to impart a three-dimensional configuration thereto with multiple faces; folding tabs and tong...

A solvent-free preform of a 3-hydroxybutyric acid polymer is subjected to a compression step to reduce its thickness by at least 5% and the compressed preform is then drawn uni- or bi- axially to induce orientation.

An electric shaver with a trimmer is disclosed in which a single flexible seal is used to protect the motor and electric parts from water and other material entering through the perforated comb or the trimmer.