In the making of a lead storage battery, it is proposed to store all the sulphuric acid necessary to establish the final acid density of a working electrolyte as lead sulphate in the active mass of the plates and then to pour a water gel-forming mixture into the cell compartments.

The invention relates to a waste container, in particular made from stainless steel, whose wall consists of two half-shells (13a, 13b) which are connected at the top by a circumferential rail (19) and, in the first embodiment, are held together at the bottom by one or preferably two reinforcing hoops (17), the reinforcing hoop(s) serving as a securing means for a removable collecting pan (15) whic...

A decanter centrifuge used for liquid-solids separation of a feed solution containing suspended solids by means of a centrifugal force. The decanter centrifuge is characterized by at least one dip weir fixed to the external periphery of the wall of a straight shell of a screw conveyor on the solid discharge port-side away from a slurry feeding port, while there is a distance between the external p...

The invention relates to a method of preventing the formation of lead dust during the manufacture and assembly of electrode plates of lead-acid batteries. It is proposed that the plates should be impregnated, preferably with a sodium hydrogencarbonate solution, prior to drying. This achieves not only an immobilisation of lead dust on the surface of the plates but also a marked improvement of certa...

A plasma arc torch for minimizing delay in exchanging gases within the torch. The torch includes a metallic electrode, a conductive nozzle spaced apart from the electrode, and a gas plenum between the electrode and nozzle. Two gas passageways are provided for communicating non-oxidizing and oxidizing gases into the plenum. A plenum inlet check valve is associated with each gas passageway and is lo...

PCT No. PCT/NL91/00095 Sec. 371 Date Feb. 16, 1993 Sec. 102(e) Date Feb. 16, 1993 PCT Filed Jun. 11, 1991 PCT Pub. No. WO91/19572 PCT Pub. Date Dec. 26, 1991.A flotation cyclone for flotation of small particles of less than 30 mu m, comprising a cylinder (1) with an upper section, having a porous wall (4) and an extension (6) having a solid wall, said upper section being provided with a tangentia...

A connection component (10) suitable for use with an enteral fluid delivery set wherein the connection component (10) consists of a threaded cap having a projecting spike (32) thereon to penetrate and deform a foil diaphragm on the fluid container and further including an air passageway (30) having a flexible member (38) therein to allow filtered air to flow into the fluid container while preventi...

Polyurethane can be reclaimed from solvent-containing or solvent-free polyurethane wastage by adjusting the amount of solvent, preferably with methyl ethyl ketone; adding an emulsifier, preferably, acylpolyethyleneglycolester; then adding about twelve times the wastage weight of water; mixing, preferably for about one hour at room temperature to form an emulsion; and then expelling the solvent as ...

A central station (Z) is connected to at least one primary alarm line (MPL) which is formed by a serial signal bus (SB) to which various elements (EL1 to ELn) and, at the termination of a respective surveillance area (UEB1, UEB2), a block lock element (BS1, BS2) are connected. All connected elements are capable of monitoring and emitting alarm signals almost simultaneously, the signal (UES) used f...

A process for the fast upgrading of a PET resin comprises the extrusion of a low molecular weight PET with a dianhydride of an aromatic tetracarboxylic acid. The molten product is pelletized and fed to a solid state polycondensation reactor.

Use of polyfluoroalkanes of the formula CX3-CY2-R (I> in which X radicals on the same C atom stand for hydrogen and/or fluorine, Y radicals on the same C atom stand for hydrogen, fluorine and/or CF3 and R stands for CH2F, CHF2, CH3, CF3, CF2-CH3, CF2CH2F, CH2-CH3, CH2-CH2-CH3 or -CH(CH3)-CH3 and a molecule of the formula (I) contains at least two fluorine atoms, as propellant gases. o

Vulcanising mould for tyres having a mould body part which has a mould surface bearing profiled ridges. At least some of the mould profiled ridges (4) consist partly of a material having a low thermal conductivity coefficient.

A test strip analysing system consisting of test strips and an associated evaluation device. The evaluation device has a positioning device (5) for exactly positioning a test strip (1). A fixing element which locks into a recess (8) of the test strip (1) is used for this purpose. Improved handling properties with as little as possible structural expenditure and good positioning accuracy ...

METHOD OF PRODUCING WEAR RESISTANT ARTICLES HAVING SUPER HARD COAT AND ARTICLES MADE THEREFROM Articles such as cutting tools are coated with an intermediate layer, on the surface of a shaped core, of at least one chromium-carbon compound having a ratio of chromium to carbon within a specific range, followed by deposition of a diamond layer on the intermediate layer. The intermediate layer signifi...

Solutions such as for example groundwater, drinking water, extracting solutions and effluents contaminated with metals, radioactive species and organics, singly or in combination, are treated by first removing undesirable oxidizing agents from the contaminated solution. Then the contaminated solution is separately treated with aqueous solutions of ferrous sulfate and hydroxide, which precipitate s...

PCT No. PCT/FR91/01052 Sec. 371 Date Jun. 22, 1993 Sec. 102(e) Date Jun. 22, 1993 PCT Filed Dec. 20, 1991 PCT Pub. No. WO92/12285 PCT Pub. Date Jul. 23, 1992.A method of treating an aramid monofilament by plasma in such a manner that the monofilament has a wettability by water satisfying the relationship WSSL>/=120, WSL being the reversible solid-liquid adhesion work expressed in mJ/m2. By way of ...

The device for collecting measurement samples, intended in particular for ground-water or soil-air investigations, can be used together with cylinder/piston arrangements (15.1), which interact with change-over valves (24.1, 24.2), to direct samples simultaneously from a plurality of different measuring regions (M1, M2) via pressure lines (26) to a sample evaluating point (28). The cylinders are co...

PCT No. PCT/SE92/00201 Sec. 371 Date Sep. 24, 1993 Sec. 102(e) Date Sep. 24, 1993 PCT Filed Mar. 31, 1992 PCT Pub. No. WO92/17714 PCT Pub. Date Oct. 15, 1992.An electromechanical brake unit in a housing (1) is provided with a drive sleeve (8) subjected to a torque of a prestressed coil spring (6), a locking spring (16) between the drive sleeve and the housing for permitting rotation of the former ...

A process for extruding a smooth and uniform film or sheet of an ordered poly(ether ketone ketone) having a thickness of about 2.5 to 250 micrometers, wherein the molten extrudate is quenched on a drum maintained at a temperature of about 100-170 DEG C.

An electromagnetically releasable spring pressure brake has a stationary coil-bearing housing (1) with a ring-shaped magnet coil (2) and a friction lining rotor (5) that cooperates with a non-revolving, but axially movable armature core disk (4) in order to press the friction lining against a shaft housing or end shield when no current is flowing through the magnet coil, the coil-bearing housing (...