Abstract: Curable fluoroelastomer compositions comprising a fluoroelastomer, a curative for the fluoroelastomer, and a molecular sieve additive exhibit a reduced tendency to sponge during the curing process.

Abstract: Perfluoroelastomer compositions comprising perfluoroelastomers having copolymerized units of tetrafluoroethylene, a perfluoro(vinyl ether), and a nitrile-containing cure site monomer are cured with compounds that are capable of generating ammonia at temperatures of 40° C.-330° C. to produce cured compositions having excellent thermal stability. The ammonia-generating compounds also act as cure accelerators in perfluoroelastomer compositions that incorporate other curing agents.

Abstract: Curable perfluoroelastomer compositions are disclosed that comprise ammonia and uncured perfluorinated elastomers having copolymerized units of nitrile-containing cure site monomers. Such compositions are curable at low temperatures. In addition, curable perfluoroelastomer compositions are disclosed wherein ammonia functions as a cure rate accelerator in the presence of other curing agents.

Abstract: Perfluoroelastomer compositions of improved processability are provided which have reduced levels of ionized or ionizable polymer endgroups.

Abstract: Polycyclic phthalazines, in particular 2-substituted maduraphthalazines (10,12,15,16-tetrahydroxy-8-methoxy-11-methyl-1,9,14-trioxo-1,2,6,7,9,14-h exahydronaphthaceno-1,2-g-phthalazines), of formula I and their use against gram-positive bacterial strains, particularly against multi-resistant staphylococci (MRSA) and against glycopeptide-resistant, for example vancomycin-resistant, enterococci. The polycyclic phthalazines are thus suitable for preparing anti-bacterially effective pharmaceutical compositions. In formula I, R.sup.1 is carboxyalkyl or carboxyaryl, and R.sup.2 and R.sup.3 represent H or acyl (for example CO-alkyl or COO-alkyl), with R.sup.1 being different from optionally substituted carboxyphenyl when R.sup.3 represents C.sub.1-8 alkanoyl. The invention also relates to salts, amides and esters of compounds of formula I.

Abstract: Perfluoroelastomer compositions are provided which have excellent high temperature properties. The perfluoroelastomer component of the compositions are copolymers having a plurality of carbonyl-containing functional groups and copolymerized monomer units comprising a perfluoroolefin, a perfluoro(vinyl) ether and a nitrile-containing cure site monomer. The curative component is other than an organotin compound and includes peroxides, ammonium salts, aromatic amino compounds, bisamidrazones, and bisamidoximes.

Abstract: A screening device (3) for screening exterior light (2) which illuminates a room (1), is controlled such that in the room on the one hand, user comfort with regard to freedom from dazzling and room temperature is optimal and, on the other hand, energy consumption for artificial lighting within the room or for heating and cooling the room is minimized.

Abstract: Perfluoroelastomer compositions of improved processability are provided which have reduced levels of ionized or ionizable polymer endgroups.

Abstract: Curable perfluoroelastomer compositions are prepared in the presence of an initiator system comprising a mixture of a persulfate salt and a reducing agent wherein the amount of reducing agent present is no more than 20 mole percent of the total initiator system. The perfluoroelastomer is isolated and decarboxylated, thereby providing a product having excellent processability.

Abstract: Perfluoroelastomer compositions of improved processability are provided which have reduced levels of ionized or ionizable polymer endgroups.

Abstract: Curable perfluoroelastomer compositions are prepared in the presence of an initiator system comprising a mixture of a persulfate salt and a reducing agent wherein the amount of reducing agent present is no more than 20 mole percent of the total initiator system. The perfluoroelastomer is isolated and decarboxylated, thereby providing a product having excellent processability.

Abstract: In a system for the control of several appliances (1-5), in particular light fittings distributed in several rooms (A, B, C), from a central command generator (10, 11), and with a method for setting this system into operation, one of the appliances (5) is selected and monitored for the issue of an externally detectable identification signal. All appliances (1-5) already have, before installation of the system, an original address (U4, U2, U1, U5, U3) and are installed without regard to these original addresses. After the installation, the original addresses (U4, U2, U1, U5, U3) are chosen one after the other, and the associated appliances (1-5) instructed to identify themselves. When the selected appliance (5) identifies itself, there is transmitted thereto a preset operational address (B5). This method is then repeated with other selected appliances (1-5), until all appliances have operational addresses (B1-B5).

Abstract: Perfluoroelastomer compositions of improved processability are provided which have reduced levels of ionized or ionizable polymer endgroups.

Abstract: Curable perfluoroelastomer compositions are provided which comprises a perfluoroelastomer, a curative, and an organic or inorganic ammonium salt which decomposes between 120.degree.-225.degree. C.

Abstract: In accordance with the invention the circuitry arrangement comprises a central unit (5) and a plurality of peripheral units, such as control apparatuses for lamps, connected with the central unit via a data bus. These peripheral units are each connected with the data bus (1) via a coupling unit (3), each coupling unit (3) having a receiving branch for the transfer of information from the central unit (5) to the peripheral unit, and a transmission branch for the transfer of information from the peripheral unit to the central unit (5). Here, the central unit (5) sends out information in the form of a modulated a.c or pulse voltage onto the data bus. The transmission branch applies information to the data bus (1) in that the output resistance of the transmission branch is varied. Because the receiving branch in the coupling unit (3) is continuously active and the transmission branch is inactive in the case of non-sending operation, at most a very small return current is consumed in the coupling unit (3).

Abstract: A control system for a plurality of appliances in distributed arrangement, in particular lighting fittings, having a command generator (1), a receiver (10) associated with each appliance (40), a control line (2) which connects the command generator (1) to each receiver (10), and a first memory (20, 23) in each receiver (10) in which an operational address (A2) for the associated appliance (40) can be stored. A control part (30, 50) is provided in each receiver (10) by means of which the appliance (40) associated therewith (30, 50) can be controlled by the command generator (1) if it (30, 50) has first been activated by selection of the operational address (A2) of the appliance (40) associated therewith. The control system for appliances that are to be in distributed arrangement is intended to make a particularly simple initiation of operations possible.

Abstract: A method and circuit arrangement for adapting the light intensity of the summation light (E.sub.i) of a room lit by internal light (E.sub.k) and external light (E'.sub.i) to the external light (E.sub.a), which varies with the time of day, in which the light intensity of the internal light is controlled in dependence on one or more control parameters according to a given function and the function can be varied according to individual preference, are to be arranged so as to provide means of making finer adjustments to the light intensity in a room. This is achieved by determining the function by a plurality of independently settable function values (11), each function value (11) being variable independently of other function values (11).

Abstract: In the embodiment disclosed in the specification an evaporation cooling system for an internal combustion engine heat exchanger avoids valves or the like by providing a liquid-vapor separator in the vapor line between the engine and the main condenser and a bypass line for liquid coolant which bypasses the main condenser leading to a condensate line having a pump. When the temperature of the engine is high enough for coolant to vaporize, the vapor passes through the vapor line and the separator to the main condenser. A heat exchanger for a vehicle heater is disposed in the condensate line so that it always receives all of the coolant in circulation.

Abstract: The invention contemplates a so-called switching probe head in which the movable element of the probe has a tensed at-rest position on support structure which determines its zero position and from which it is displaced upon work contact.To increase the accuracy by which the zero position of the probe element (2, 4) is reproduced, the probe element is suspended, without friction, from a housing part (1) of the probe head, via at least three filaments (5a, b, c), wires or flexible strips. For torsionally rigid centering of the probe element, friction-free wire or strip arrangements are also usable; and torsional-rigid alternatives include use of a bellows (3) or of balls having rolling contact with opposing walls of centering grooves.

Abstract: The invention contemplates an improved work-contacting probe for use in a measuring machine wherein the relationship between contacted locations on a workpiece are reduced to coordinate digital data. The various described probe embodiments feature means whereby positional errors due to probe flexure upon work contact are substantially reduced, as compared to pre-existing structures.