Surface temperature sensors

1292740 Resistance thermometer VYZKUMNY USTAV ORGANICKYCH SYNTEZ 2 Oct 1970 [3 Oct 1969 8 Sept 1970] 46890/70 Heading H1K A resistance thermometer comprises a wire mounted between a base plate and a cover plate of non-fibrous material, the components being bonded together. Either or both of the plates may be of laminated silicon glass, mica, glass foil, ceramic or are organic material or of a metal such as platinum insulated with a layer of ceramic. The wire may be of platinum, nickel, tungsten or alloys thereof. The plates may be held together by soldering, and may be perforated. One of the plates may be of magnetic material to enable the device to be attached to a surface. In the embodiments the wire is arranged in a meandering pattern (Figs. 1 and 2, not shown); a plurality of such patterns are arranged side by side between a pair of plates (Fig. 3, not shown); two wires extended a constant distance apart in a meandering pattern (Fig. 4, not shown); two meandering resistor wires are arranged one either side of a single base-plate and are provided with separate cover plates (Figs. 5 and 6, not shown); two units, each comprising a resistor and a heating element arranged on either side of a base-plate and provided with two cover plates, are arranged to form a thermal feedback system (Fig. 7, not shown) and the two resistor-heater structures of the previous embodiment are placed on either side of an insulating layer and enclosed in a thermally insulating enclosure (Fig. 8, not shown).

Apparatus for electrochemical analysis of gases

1277320 Electro-chemical analysis VYZKUMNY USTAV ORGANICKYCH SYNTEX 7 July 1970 [7 July 1969] 32814/70 Heading G1N The invention relates to an electro-chemical cell for the analysis of gases which are absorbed in a film of electrolyte on the indicator electrode. In one arrangement the reference electrode is in a reservoir from which electrolyte flows or drips onto the indicator electrode Fig.1 (not shown). In an alternative arrangement Figs.2, 3 (not shown) both electrodes are mounted in a holder through which electrolyte flows to escape at the bottom over the projecting active part of the indicator electrode.

Diaminostilbene-2,2'-disulphonic acids

X = Halogen, OH, CH3O, C2H5O, or aryloxy which is opt. substd. with CH3, halogen, sulpho or carboxy or X may be NH2, mono- or di- 1-5C alkyl; mono- or bis-(hydroxyethyl) amino; (thio) morpholine- 1,1-dioxy; aryl or arylalkyl-amino (aryl = phenyl or naphthyl opt. substd. with halogen, CH3, sulpho or carboxy and the alkyl has 1 - 5C) or N-hydroxyethyltauric gp. The compounds are optical brighteners.

2-nitro-metaxylene-4,6-disulphonic acid and the salts thereof and the method for the preparation

1443903 2 - Nitro - meta - xylene - 4,6- disulphonic acid VYZKUMNY USTAV ORGANICKYCH SYNTEX 20 Nov 1974 39562/74 Heading C2C The invention comprises 2-nitro-meta-xylene- 4,6-disulphonic acid and salts thereof, of general Formula (I) in which X and Y are the same or different and each represents hydrogen or a metal ion from the 1st and 2nd groups of the Mendeleev Periodic System, iron, aluminium or ammonium. They may be prepared by nitrating a compound of Formula (II) When at least one of X and Y is hydrogen the compound may be converted to the required salt. The nitration may be carried out in an organic solvent or in a medium containing sulphuric acid. The starting material may be prepared by sulphonating m-xylene-4-sulphonic acid or a salt thereof.

Electrochemical measuring method and device for its realization

1,271,283. Electro-chemical analysis. VYZKUMNY USTAV ORGANICKYCH SYNTEZ. July 24, 1969 [July 26, 1968], No.37198/69. Heading G1N. In electro-chemical analysis the electrodes are arranged in the path of a free jet of sample liquid, whereby they respond rapidly to changes in the sample and are less subject to formation of scale. Modifications: - cleaning and rinsing fluid may be introduced through pipes (12), (14) Fig. 2 (not shown); the indicator electrode may extend through the sample jet nozzle; the electrodes may be enclosed in a housing with inter-changeable bases one of which holds a calibration cup Fig. 3 (not shown); separate nozzles (21) may be provided for the supply of cleaning fluid Fig. 4 (not shown); the level of liquid retained in the cell may be controlled by a syphon Fig.5 (not shown); rotary mechanical cleaning brushes may be mounted on the indicator electrode and turbine driven by the sample jet. A system for determining the pH of soda lyes is mentioned with reference to Fig.6 (not shown).

Verfahren zur Herstellung von Phthalocy aninen

Verfahren zur herstellung von phthalocyaninen

Verfahren zur herstellung von phthalocyaninen

Verfahren zur Herstellung von isomeren Sulfonaten aromatischer Carbonsäuren

Verfahren zur herstellung von stickstoffderivaten cyclischer carbonsaeuren

Verfahren zur herstellung von aromatischen carbonsaeuren durch oxidation von aromatischen kohlenwasserstoffen

Reaktive Azofarbstoffe und Verfahren zu ihrer Herstellung

Verfahren und Vorrichtung zur Reinigung einer Quecksilbertropfelektrode

Verfahren zur herstellung von 4-aminoindan-7-sulfonsaeure und/oder 5-aminoindan-6-sulfonsaeure

Verfahren zur Herstellung von SuIfonaten cyclischer Carbonsäuren

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Verfahren zur herstellung von stickstoffderivaten aromatischer carbonsaeuren

Verfahren und vorrichtung zur amperometrischen konzentrationsbestimmung von arendiazoniumsalzen

Dispositif permettant d'amener par dispersion jusqu'à finesse colloïdale des suspensions de particules solides

Mit stirnseitenprofilen versehene ruehrscheibe

Mit Stirnseitenprofilen versehene Rührscheibe