Abstract: An electrochemical system including a chlorine positive electrode, such as zinc-chlorine cell, is disclosed which complexes chlorine by utilizing (1) a selected organic compound, such as, for example, n-butyl carbamate, which includes a --NH.sub.n R.sub.2-n functionality wherein R is an appropriate organic moiety, and n is an integer, either 1 or 2, and an electron-withdrawing substituent alpha to the nitrogen and (2) a buffer to provide a liquid oil, which yields chlorine when required in discharge of the cell.

Abstract: Activation of thermoplastics, such as polyphenylene sulfide, polysulfone, and polyether sulfone thermoplastics by subjection thereof to bromine is disclosed. The activation process is carried out at relatively low temperatures, such as below 200.degree. F. and illustratively, may be carried out at room temperatures. The bromine, in the illustrated embodiment, is provided in an aqueous solution with or without acids or halide salts. The halide salts, when utilized, provide control of the activity of the bromine. The process advantageously adapted for activating the thermoplastic material where it is intended that it serve as a substrate for use in accepting copper plating, as in printed circuit board manufacture.

Abstract: The disclosure depicts a novel gas switch comprising a membrane having at least one passageway separating a first gas containing region from a second gas containing region. The gas switch also comprises a liquid having a low vapor pressure contained at least within the passageway of the membrane. The liquid is contained in the passageway when a pressure difference between the first and second regions is less than a first predetermined value, thereby preventing a gas exchange between the first and second regions. When the pressure difference across the membrane exceeds a second predetermined value the liquid substantially flows out of the passageway, thereby opening the passageway for a gas exchange between the first and second regions; and when the pressure difference across the membrane is reestablished at a value less than the first predetermined value, the fluid flows back into the passageway thereby closing the passageway and ending the gas exchange between the first and second region.

Abstract: An automatic zero balance circuit for nulling the initial offset signal received from a test transducer. A quadrature oscillator powers a carrier transducer with the phase reference signal. A summing circuit receives the return signal from the transducer and sums it with two other signals. The resultant summation signal is divided into two components, the phase reference component and the quadrature reference component which are fed back into the summing circuit as the two other signals. The component values nullify the return signal thereby cancelling the initial offset signal.

Abstract: A method and an apparatus is disclosed for electrically damping the rotation motion of a stepper motor. The voltage of the non-energized side of the motor windings is monitored and compared with the energized side. Once the voltage on the non-energized side reaches a predetermined value greater than the voltage on the energized side, the non-energized voltage is shunted to the energized voltage.

Abstract: A readily etchable printed circuit board is provided which comprises a resinous substrate having bonded to at least one surface thereof a composite metal structure. This metal structure includes a layer of copper foil having opposed first and second surfaces and a thin layer of nickel having opposed first and second surfaces with one of the surfaces of the copper foil being bonded to one of the surfaces of the nickel layer and the opposite opposed surface of the nickel layer being bonded to the resinous substrate with the nickel layer containing an effective amount of sulfur to render the copper foil and the nickel barrier layer mutually etchable, i.e., etchable by the same etchant. The preferred amount of sulfur ranges from about 0.05 to about 10.0 weight percent.

Abstract: A system for priming liquid ink writing instruments such as ink jet writers and capillary ink pens is disclosed. A source of ink is pressurized to force ink through the ink jet or other pen so that a small droplet is formed at the jet or pen outlet. As the drop forms at the jet or pen, it is eventually drawn away into an adjacent orifice, due to capillary action. An integrated priming pump serves both to pressurize the ink source to form the ink droplet and to apply a vacuum to the orifice to remove the ink drawn away by capillary action. A pressure release valve ensures that the ink jet or pen is not overpressurized during priming. In ink jet applications, the drop removal orifice is formed as a portion of the droplet charging ring.

Abstract: A process is provided for producing a composite structure suitable for use in connection with the manufacture of printed circuits which includes a carrier layer of aluminum and a covering layer of copper which structure is characterized by the fact that the copper layer is tenaciously bonded to the carrier layer but readily separable therefrom by mechanical means without destroying the integrity of the copper layer which process comprises the steps of (a) providing a layer of aluminum foil, (b) cleaning at least one major surface of the aluminum foil to remove surface contaminants therefrom, (c) positioning the aluminum foil in a suitable electrolyte and passing electric current therethrough in such a manner that the foil is rendered cathodic to activate the surface of the foil, (d) positioning the activated foil in a suitable electrolyte and passing electrical current therethrough in such a manner that the foil is rendered anodic and a layer of aluminum oxide is formed on the surface thereof, and (e) electro

Abstract: An improved ink jet writing device is disclosed which comprises a specially configured glass capillary liner having a smoothly flaring, integral inlet nozzle in one embodiment and a converging-diverging inlet nozzle in another embodiment, both embodiments having a smoothly converging outlet nozzle. Both exhibit improved frequency response at reduced voltage compared to other jets having glass liners. A jet having an angled or bent tip also is disclosed.

Abstract: A novel process of preparing ketoxime carbamate.

Abstract: Carbamate derivatives of ketoximes are useful in combating pests such as insects, mites, and nematodes.

Abstract: The present invention relates to an improvement in a process for polymerization of polyvinyl chloride, particularly in a suspension polymerization process which provides for removal of residual vinyl chloride monomer, such as by employing a step in which the PVC suspension resin slurry is passed through a column in which it is subjected to a combination of stream and pressure/vacuum conditions. In the improved process of the present invention, the PVC suspension resin slurry feed to the stripping column is first passed through the cold feed side of a spiral hat exchanger, and the PVC suspension slurry outflow from the stripping column is passed through the hot feed side of the heat exchanger, whereby the feed stream to the stripping column acts as a cooling medium for the outlet stream from the stripping column, and the outlet stream from the stripping column serves as a preheating medium for the feed stream.

Abstract: Carbamate derivatives of ketoximes are useful in combatting pests such as insects, mites, and nematodes.

Abstract: Carbamate derivatives of ketoximes are useful in combatting pests such as insects, mites, and nematodes.

Abstract: Carbamate derivatives of ketoximes are useful in combatting pests such as insects, mites, and nematodes.

Abstract: Carbamate derivatives of ketoximes are useful in combatting pests such as insects, mites, and nematodes.

Abstract: Ruthenium is stripped from a catalyst or electrode substrate by immersion in a fluoboric acid solution, converted to ruthenium oxide, and the ruthenium oxide is then converted to the alpha ruthenium trichloride for use in the preparation of fresh catalyst and/or electrodes.

Abstract: Carbamate derivatives of ketoximes are useful in combatting pests such as insects, mites, and nematodes.

Abstract: The present invention relates to a novel catalyst system for chlorination of hydrocarbons either by oxyhydrochlorination, and/or oxychlorination. The catalyst system comprises copper chloride impregnated onto an alumina support with a metal chloride selected from the group consisting of potassium chloride, lithium chloride, cesium chloride, magnesium chloride, calcium chloride or barium chloride, said alumina support having a sodium oxide content of from 0.2 to about 2.0% by weight and a silica content no more than 4%.

Abstract: Carbamate derivatives of ketoximes are useful in combatting pests such as insects, mites, and nematodes.