摘要:
A device (10) for moving patients who are confined to bed comprises a travelling undercarriage which can be locked in place by means of a locking brake (84), a stretcher support (16) which can be adjusted vertically and laterally relative to the undercarriage (16) and a locking gear (90) for the stretcher support (16). In order to obtain a stabilizing system securing the arrangement against tilting, which is easy to operate, it is proposed to provide a solid block (14) carrying the said vertically adjustable stretcher support (16) which block is carried itself by at least one guide element (34, 36) extending transversely in the said undercarriage (12) in such a manner that it can be displaced in transverse direction between two lateral end positions, with the locking gear comprising stop means which is arranged at the block (14), which can be controlled from the said stretcher support (16) and engaged in recesses provided on the guide element (34, 36) for blocking the relative movement between the block (14) and the undercarriage (12).
摘要:
A process for the electrical insulation of wire by enamelling, using aqueous dispersions which are applied thereto by means of applicator rollers. The thickness of the dispersion coating on the wire can be varied by merely suitably selecting the circumferential speed of the applicator rollers.
摘要:
A process for the electrical insulation of metallic conductors by coating wires with aqueous dispersions of coating materials, comprising the following steps which are carried out in a single cycle: introducing the starting dispersion into a storage zone A; continuously withdrawing part of the dispersion from the storage zone and feeding said part to a dispersing zone, where it is homogenized and comminuted; if necessary, cooling the dispersion to below 40.degree. C in a cooling zone; feeding the dispersion to a fractionating zone D, where it is separated into a coarse fraction and a fine fraction; and finally, passing the fine fraction through coating zones E, through which wires are drawn so as to receive a coating.
摘要:
Process for the manufacture of polyester imides. Melamine, an at least tribasic carboxylic acid, a polyhydric alcohol and, optionally, an aromatic dicarboxylic acid are condensed at elevated temperature. The polyester imides are suitable, in the form of solutions, aqueous dispersions or melts, for use as baking enamels for metallic conductors.
摘要:
A polyamide-imide precondensate which is solid at room temperature, but is fusible and soluble in polar solvents. It is manufactured by first condensing 1 mole of diamine with 2 moles of tricarboxylic acid anhydride in a diol as the solvent, to give a diimide-dicarboxylic acid, then esterifying the diimide-dicarboxylic acid with the diol and finally effecting the polycondensation by adding 1 mole of diamine per mole of diester. The precondensate may be used, as a melt, as a solution in organic solvents or as an aqueous dispersion, for coating electrical conductors.
摘要:
Aqueous polyester imide dispersions are prepared by allowing molten polyester imide to solidify and then comminuting it in the dry state to a particle size of 100 .mu.m or less, whereupon the particles are milled in water to a particle size of less than 5 .mu.um. The dispersions may be used for the manufacture of heat-resistant bonds and impregnations and for electrical insulation of metallic conductors. m.
摘要:
322,091. Jung, H. Nov. 27, 1928. Block filters; filtering- media. - A number of tubular filter elements 2 are suspended in rows from a partition wall 9 within a closed receptacle 1, the wall 9 having transverse channels 15, each receiving filtered. liquid from a row of elements 2, and also apertures 10, which allow of the upward passage of some of the liquid under treatment. The liquid is supplied to the receptacle through pipes 54,. 3 , 3, is distributed by apertures 6 in a plate 7, flows lengthwise past the filter elements, part filtering into the elements and the rest passing through the apertures 10 and being returned to the storage vessel through a pipe 12. The channels 15 discharge the filtrate into a common collecting pipe 17. An air supply pipe 18 connected to the pipe 17, has branches 18 , 18 to the pipes 12, 3 . The pipe 3 has branches 56, 58, 60 which serve respectively for the return of unfiltered liquid to the storage tank preparatory to a cleaning operation, for the supply of lixiviating liquid and for the supply of wash water. With the connections as described it is possible after a period of filtration, to expel all liquid from the receptacle 1 by supplying compressed air through the pipe 12, to lixiviate the cakes formed around the elements, to discharge the cakes by means of compressed air supplied to the elements through the channels 15 and to wash the filter elements by water, supplied to the receptacle from the pipe 60 and agitated by air supplied through the pipe 3', and, if desired, from within the elements. The bottom 5 of the receptacle, which is opened for the discharge of the cakes, is pivoted on a counterweighted lever 39, and clamped against the lower edge of the cylindrical wall by means of a bayonet joint device with wedges 48, which are moved by hydraulic pistons 49, Fig. 4. The pipe 3 which makes joint with the lower end of the pipe 3 moves with the bottom 5. The filter elements are built up of rings 25, Figs. 6 to 8, of ceramic or stone-like material, such as quartz, infusorial earth or silicon carbide which may be reinforced by material capable of bearing high stresses. Such reinforcement may comprise rings coated with glass, enamel, or other binding flux or formed wholly of the flux material. Annular discs 26, Fig. 8, of celluloid or vulcanite, or of the materials sold under the registered Trade Marks " Bakelite " and " Pertinax," may be attached to the surfaces of the rings 25, or these surfaces may be coated with enamel or by spraying with atomized metal. Each element has an inner carrier tube 21, fixed in the partition wall 9 by means of a collar 22 and screw cap 20, and having perforations 14, 30, within the channel 15 and the lower end, where the hollow body formed by the rings 25 is continued by a cylinder 29 of metal, vulcanite or other strong material.. The rings 25 are spaced from the tube 21 by longitudinal members 33, Fig. 7, of rubber or like material. Electric rings of rubber, klingerite or the like may be interposed between the rings 25 or between groups of the rings.