A method and apparatus for reducing a metal compound particularly iron oxide, by means of a reducing agent comprising CO or H2 or a mixture of these two gases, of which the average temperature is between 850 DEG C. and 1000 DEG C. and which has been obtained at this temperature by means of a plasma arc heater. The CO and H2 mixture is preferably obtained by heating a mixture comprising a selecti...

A soft, perf-embossed, absorbent composite structure is provided which comprises an absorbing layer of a fibrous web containing at least about 200 percent by weight of superabsorbent and a wicking layer. The composite structure has a Taber stiffness value less than about 30.

A conductor has opposite end portions forming a number of successive radially stratified helical windings terminating in an outermost winding having one end portion extending outwardly. The windings have opposed end faces. A spiral winding extends from an innermost helical winding and is arranged against one of the end faces in successive radially stratified loops so as to terminate in an outerm...

An improvement in the dry vacuum cleaning of soft and hard surfaces in which vacuum only is applied to such surface, is characterised in that dry soil flowing away from such surface under the influence of vacuum is sprayed with liquid and deposited in a wetted condition in a liquid and soil-collecting vessel. Also proposed is apparatus for cleaning hard and soft surfaces by simultaneous appli...

Occlusive epicutaneous testing strip and method for demonstrating whether or not an individual suffers from contact allergy to a test substance. The test strip has at least one patch on which the test substance is incorporated in a vehicle formulated as a film which adheres to the patch and contains at least one film-forming polymer capable of absorbing moisture which when the strip is being used ...

Occlusive epicutaneous testing strip and method for demonstrating whether or not an individual suffers from contact allergy to a test substance. The test strip has at least one patch on which the test substance is incorporated in a vehicle formulated as a film which adheres to the patch and contains at least one film-forming polymer capable of absorbing moisture which when the strip is being used ...

Atactic polypropylene is produced by slurry-polymerizing propylene with the aid of a Ziegler-Natta catalyst system wherein the carrier is a chlorinated organic magnesium compound. The catalyst system is prepared in that the above-obtained solid component is refluxed with hot TiCl4 solution, and the product thus obtained is fed together with trialkylaluminium under slurry conditions into propylene ...

A light-sensitive compsn. contains (a) 1,2-naphthoquinone-2diazide- sulphonate esters of a polyhydric phenol contg. keto gps. of formula (I), and (b) a polymeric binder which is insoluble in water but soluble or swellable in aq. alkaline solution. In the formula, D is a 1,2-naphthoquinone-2-diazide-5(or -4)-sulphonyl gp., the R gps. are H, halogen, C1-4 alkyl or DO, n is 2-18, and the maximum of ...

Control rod for a nuclear reactor having absorber vanes (24), in which an absorber material for neutrons is arranged along the predominant part of the length of the vanes, and which together form a right-angled cross, the control rod being able to be pushed in from underneath between four fuel cartridges (10) and being arranged between a carrier plate (29) and a core grid (25) arranged above the s...

Control rod for a nuclear reactor having absorber vanes (24), in which an absorber material for neutrons is arranged along the predominant part of the length of the vanes, and which together form a right-angled cross, the control rod being able to be pushed in from underneath between four fuel cartridges (10) and being arranged between a carrier plate (29) and a core grid (25) arranged above the s...

Gaseous components are scrubbed from gaseous mixtures with a physical solvent; the latter, after absorption of the scrubbed-out gaseous components, is regenerated by expansion and stripping, wherein the gaseous fraction being released is discharged and the regenerated solvent is recycled into the scrubbing step. To reduce the content of solvent vapors in the gases to be exhausted into the atmosphe...

Polyacrylonitrile articles, such as filaments, tapes and films, having high tensile strength and modulus, and prepared by adding to a solution of polyacrilonitrile with a molecular weight above 3x105, preferably above 5x105, a minor amount of a bivalent metal compound, converting the solution into a solvent containing article, cooling this article to form a gel article, removing from this gel the ...

Connection equipment for medium voltage containing bus bars 10 with circular circumferences, which are single-phase, enclosed in a tubular casing 20 of insulation material with air insulation between the bus bar and the casing. The bus bar 10 is centred by insulated supports 23, with a creep distance which is larger than the airspace between the bus bar and the surrounding insulation and is placed...

The I.C. engine is used to drive hydraulically operated work tools, partic. on lorries. An inlet and outlet (14,14a) are provided for the tool hydraulic oil together with a return spring (38) for bringing back the piston (30) to an end position. To avoid an on-off effect, and ensure a satisfactory work process, components are incorporated (36,37,40-42) to regulate the movement speed of the piston ...

The temp. control system incorporates at least one convector (20), the battery of which, for cold, energy-carrying medium, pref. water, is coupled to a circuit (10,12,14,16,18) for such medium. The circuit also incorporates a refrigerator (22) and a recovery battery (8) in the ventilation system input air duct (2). - A changeover control (26) is installed in the conduits (10,18) of the circuit whi...

The base board (1) of the stretcher has sufficient rigidity to enable it to be carried with a person lying on it. The all-round, non-pliable strapping (3) has less thickness than the board. The top side of the board (4) carries a collapsed but raisable back support (20).

Stacker for stacking or unstacking crates 11. The stacker comprises a conveyor 10, lifting members 12 for gripping the crates 11 and raising them by a lifting height at least somewhat greater than that which corresponds to the height of the crates, and control members 13,14,15,16 for controlling the lifting members 12 so that these grip either a crate 11 on the conveyor 10 or the following crate 1...