Abstract: A battery equalizer for equalizing the voltage on series connected batteries synchronously switches the opposite ends of a tapped autotransformer in alternately reversing connection to the distally opposite terminals of the battery by alternately turning transistor switches on and off in alternate pairs while maintaining a center tap of the autotransformer connected to an intermediate terminal of the series batteries. Switching is accomplished by power field effect transistors and a voltage converter converts the upper battery voltage to a floating voltage so that the voltages of the two batteries can be differenced. The differenced voltage provides an error signal for driving a pulse width modulator which switches the transistors. Two protective power switching field effect transistors are interposed in the circuit and connected to prevent damage to the circuitry in the event of misconnection.

Abstract: An electronic tare system used in an electrical balance of the type which generates an electrical signal representing a mass being weighed for application to a digital read out or other display is capable of bipolar operation over a range much greater than that of the balance by generating and storing a digital value in response to the combined analog signals at an electrical summing junction coupled to receive both the electrical signal from the balance and an analog electrical signal generated from the stored digital value. An up-down counter coupled through a digital-to-analog converter to the summing junction counts in response to the output of a high gain amplifier coupled in a feedback loop to the output of the summing junction during the first portion of a tare mode of operation until the output of the digital-to-analog converter to the summing junction effectively equals and nulls the signal from the balance.

Abstract: Anion exchange resins containing borohydride counter ions display essentially the same chemical activity as solutions of sodium borohydride but have the added advantage that products treated therewith are not contaminated with sodium ions or borate ions. Thus, alcohols can now be freed of carbonyl components without thereby being contaminated with borate; metal ions, such as silver, can be reduced to the free element; metal ions of groups IV-A to VI-A can be converted to volatile metal hydrides; and transition metal ions can be converted to the boride. The anion exchange resin is prepared by treating a strong base anion exchanger with aqueous sodium borohydride or sodium cyanoborohydride. Regeneration of the borohydride form from the borate proceeds directly with aqueous sodium borohydride.

Abstract: A solid composition comprising a homogeneous mixture of a solid thermoplastic resin and from 1 to 80 weight % of at least one microbiocide which is insoluble in water, is readily dispersible or soluble in the resin at temperatures sufficiently high to permit plastic manipulation of the resin and the dispersion or solution of the microbiocide is sustained indefinitely upon cooling to ambient temperature while the diffusivity of the microbiocide in the resin under such conditions becomes vanishingly small, retains its microbiocidal activity in the resin and does not degrade or react with the resin in which it is dispersed. This compositon provides a convenient non-toxic dosage form of the microbiocide which is subsequently mixed with a second thermoplastic resin at a concentration of about 0.5 to 15 weight % to obtain a homogeneous resin composition containing an effective amount of the microbiocide.

Abstract: A microbiocidal solution for resin compositions including a glycyl phosphite or glycyl phosphonate and at least about 20 weight percent of a microbiologically active phenoxarsine. The composition can include additional solvents or dispersants or resin plasticizers.

Abstract: The invention provides aqueous solutions of (1) the reaction product of anhydrous trimethyl borate with titanium tetrachloride and (2) polyvinyl alcohol, preferably not exceeding about 0.5 weight percent of each. These solutions have a pH of about 1, but when ammonium hydroxide is added, the pH may be raised to about 10 without precipitation of titanium or gelation of the polyvinyl alcohol.When the pH of the above solutions is adjusted to between about 2 and about 10, the solutions are photosensitive. When these solutions are in a confined zone, sunlight or actinic radiation in the range between ultraviolet light and the lower wavelengths of the visible spectrum causes oxygen from the air above the solutions to be consumed until it is all gone. Then, reduction of the colorless dissolved Ti(IV) compound to the dark blue Ti(III) state occurs without precipitation of the Ti(III) product or reoxidation to Ti(IV). The blue Ti(III) solution is quickly reoxidized by reexposure to air.

Abstract: A process for bleaching wood pulp with sodium hydrosulfite in the presence of at least 2 weight percent of hexamethylenetetramine based upon the weight of sodium hydrosulfite.

Abstract: An aqueous composition for bleaching wood pulp containing sodium hydrosulfite, and at least 2 weight percent hexamethylenetetramine based upon the weight of sodium hydrosulfite, wherein the solution has a pH between about 4 and about 11. The hexamethylenetetramine prevents hydrogen sulfide formation during bleaching of the wood pulp.

Abstract: A new graphite intercalated antimony pentafluoride wherein the antimony pentafluoride is present up to 75% by weight. This compound is obtained as a black, free-flowing powder which is substantially resistant to hydrolysis under conditions which normally hydrolyze antimony pentafluoride. The graphite intercalated antimony pentafluoride is particularly useful for exchange reactions in the preparation of organic fluorides.

Abstract: This invention relates to stabilized aqueous solutions of sodium borohydride containing soluble zinc in the form of sodium zincate. They may contain from about 35 to about 46.9 percent sodium hydroxide and from about 9.35 to about 12.9 percent sodium borohydride and 0.5 to 3 percent zinc which is preferentially added as zinc oxide and reacted with the sodium hydroxide present in the solution to form sodium zincate. These solutions may be used to react with sodium bisulfite to form solutions of sodium hydrosulfite in excellent yield. Such hydrosulfite solutions do not form trace amounts of hydrogen sulfide and do not darken or corrode copper based paper machine wires in contrast to hydrosulfite solutions which contain no soluble zinc.

Abstract: .Iadd.Microbicidal properties are imparted to vinyl resins by the incorporation therein of a selected phenoxarsine compound dissolved in a solvent which may be one of a selected group of phenols and monocarboxylic acids. .Iaddend.