Abstract: An improvement in a method of producing an ORI control additive which is the reaction product of a polybutenyl succinic anhydride and a polyoxyalkylene diamine, wherein the improvement comprises reacting solvent free the anhydride and diamine at an increased temperature and monitoring the absorbancy of the reaction product to determine the degree of reaction completion.

Abstract: In an overbased sulfonate process calcium hydroxide is formed in situ. The entire water charge and 30 to 50% of the calcium oxide is added. The temperature exotherm is observed. When the temperature ceases to rise, the remaining calcium hydroxide is added with temperature adjustment and carbonation is begun.

Abstract: A process for economically producing tabular acicular gypsum crystals in a continuously stirred reactor is disclosed. The process involves establishing a steady state atmospheric pressure reaction zone of about 20% to about 25% by weight solids of gypsum crystals in water at a temperature of about 50.degree. C. to about 60.degree. C. with continuous mild agitation. Calcium sulfate hemihydrate is fed to the reaction zone at a rate to maintain a low level of supersaturation, and a suspension of gypsum crystals in water containing crystals of a mean particle length at least greater than 45 microns is withdrawn.

Abstract: A process for producing an overbased oil soluble calcium sulfonate having a TBN of 325, said process comprising:(a) diluting a neutral calcium sulfonate with a hydrocarbon solvent and a lower alkanol;(b) adding to the diluted calcium sulfonate solution, CaO, Ca(OH).sub.2 and H.sub.2 O in molar ratios of CaO:Ca(OH).sub.2 of about 90:10 to about 20:80 and of H.sub.2 O:CaO of about 0.15:1 to about 0.30:1;(c) heating the sulfonate mixture to a temperature ranging from about 100.degree. F. to about 170.degree. F. under a pressure ranging from about 0 to about 50 psig;(d) passing CO.sub.2 into the heated sulfonate mixture for a period of about 50 to about 200 minutes;(e) adding a diluent oil to the CO.sub.2 treated sulfonate mixture;(f) separating the solids from the liquid of the sulfonate mixture; and(g) stripping the hydrocarbon solvent from the resulting over-based oil soluble sulfonate product having TBN of 325.

Abstract: A nonlinear resonant switch for power conversion devices and a converter using the switch are described. The switch optimizes converter efficiency by switching only when current is zero and by limiting the peak current to a value near that provided by conventional PWM converters. A nonlinear reactor having a winding in series with the switch and a tank circuit is biased to saturation at low currents but is driven into an unsaturated condition by high currents so that a resultant high series inductance mitigates further current increase. Several converter topologies incorporating this improvement are shown.

Abstract: A tabular variety of acicular gypsum crystal filler is prepared by hydrating calcium sulfate dihydrate particles in a seeded continuously stirred reactor at a low level of super-saturation to obtain crystals having an aspect ratio of about 100:10:1 and average length in the longest dimension of about 100-450 micrometers. For the manufacture of paper, the obtained tabular crystal slurry may be directly added to the paper pulp before web formation to obtain a filled paper having high filler retention.

Abstract: A dc to three phase ac switched mode converter is described wherein a six switch bridge is provided to interconnect the dc source to a three-phase load. A plurality of dc sources are described, each of which employs an inductor/capacitor combination for energy storage, which stored energy is subsequently applied to the output load. The stored energy is delivered by connecting the capacitor across two legs of the three-phase load, while assuring that the third leg is invariably short-circuited back upon itself. As a result, three of the six switches in the bridge are closed at any instant to prevent any current interruption in the load.

Abstract: Storage stable oxidant-amylase pre-mix or additive formulations, when added to wheat floor, dough or bakery mixes, produce improved bakery products having fine grain and good cell structure and volume.

Abstract: Four square tooling plates each have an outer surface on which a plurality of workpieces are attached. The inner face of each tooling plate is precisely attached to a respective vertical surface of a rectangular block by means of a dowel extending into geometrically centered holes in the vertical face of the block and the tooling plate. Precise rotational alignment of the tooling plate with the block is achieved by a peg extending from the vertical face of the block into a timing hole in the tooling plate spaced from the center hole thereof. The block, with workpiece-loaded tooling plates thereon, is lowered onto a rotary table so that a geometric axis of the block is perfectly aligned with the rotational axis of the rotary table. Rotational alignment of the block with the rotary table is achieved by mating of keys extending from the bottom of a base plate of the block into keyways in the surface of the rotary table.

Abstract: A disk drive for one or more spinning disks has a voice coil motor, driving the transducer carriage and controlled by two feedback loops, respectively, for hold and seek modes and enabled by a microcomputer which is additionally inserted into the seek mode feedback loop. The microcomputer receives step pulses from a controller host as well as detent pulses through a path of that seek loop; the pulses serve as interrupts and the microcomputer selects digital speed signals on the basis of step and detect pulse counts. An a/d converter inserts that signal as command into the seek loop.

Abstract: The disc file system being improved includes a motor driven transducer carriage for positioning the transducer in selected cylinder positions. A command unit issues step pulses and the carriage provides detent pulses respectively representing the number of tracks (cylinders) to be and being crossed when the carriage is caused to move and moves from one cylinder position to another one. These pulses are processed so that overlap is avoided in that following the trailing edge of each step or detent pulse, a process pulse, is produced either with or without delay depending on the need to avoid conflict. The process pulses to be produced are up an down counted for tracking actual carriage movement, and the total count is zero when the carriage has arrived at the desired position.

Abstract: A plow assembly for cutting a slit in the ground and simultaneously laying a cable in the slit as the propelling vehicle moves over the ground. The plow assembly has a shaker case containing a pair of counter-rotating eccentric weights for providing a vibratory action to the plow, additional weight means are located rearwardly of the plow and plow frame so as to reduce the amplitude of vibration at the rear end of the assembly, and the assembly also has elastomeric isolation mounts for the shaker case on the plow frame so that the resulting action of all the components is such that the plow blade pivots about a pivot point located rearwardly of the assembly and in a particularly efficient arcuate cutting movement.