Abstract: An aeronautical drogue having a canopy and support members connecting the canopy to a connector provides for essentially constant drag at variable speeds by aerodynamic pressure modulation through controllably venting the canopy by constructing the canopy of a plurality of separate elastic bands positioned side by side the elastic bands being connected at spaced intervals by flexible connections.

Abstract: An operating room instrument table assembly is formed of a plurality of modular table units each having a base frame with castor wheel supports, a table top support frame and a removable table top for positioning instruments, the removable table top being sterilizable as a unit with the instruments. The modular table tops may include receptacles and may be positioned above a drawer. A vertical wall for hanging instruments and a fluorescent light may also be included.

Abstract: The cylinder liner of an internal combustion engine includes a wet-type upper portion and a dry-type lower portion. The interior wall of the cylinder and the corresponding lower portion of the liner are machined to have an interference fit under operating conditions. The liner is firmly supported by this interference fit engagement of the liner with the cylinder bore over approximately two-thirds the length of the liner. The cylinder wall is machined to provide a shoulder substantially at the junction of the upper and lower portions of the liner and a corresponding shoulder is formed at this point on the liner. These shoulders are forced into firm sealing engagement by the torque applied to the cylinder head screws during asssembly of the cylinder head on the engine block. The vertical dimension of the shoulder on the cylinder liner is formed to be a minimum of 1/8 of the vertical dimension of upper portion of the liner.

Abstract: Pumpable, edible fillings are produced from vegetable shortening having a Wiley melt point from 90.degree. F. to 120.degree. F. and a solid fat index from 1% to 6% at 92.degree. F. and at 100.degree. F., a solids extender, and solid flavoring materials by a method which carefully controls the crystal structure of the vegetable shortening and the particle size of the solid flavoring material.

Abstract: A dental cleaner in the nature of a toothpick has an elongated stable support which is covered with fine plastic flock particles of a small diameter in order to effectively clean small gaps between the teeth, between bridge anchors and in the sulcus region and to function as a type of "micro-bottle cleaner" for the spaces where plaque needs to be cleaned from the teeth.

Abstract: Disclosed is an overvoltage suppressing circuit for a semiconductor device connected between the poles of a DC power source and adapted to effect a switching operation. The circuit comprises: a serial circuit connected in parallel with a semiconductor device and including an overvoltage suppressing capacitor, an oscillation suppressing diode, and an impedance regulator connected in series each other, the impedance regulator being operable to change into a state of high impedance for suppressing a reverse current flowing into the oscillation suppressing diode when the oscillation suppressing diode is turned off; and a discharging device connected between a DC power source and the overvoltage suppressing capacitor for discharging to the DC power source a charge accumulated in the overvoltage suppressing capacitor when the oscillation suppressing diode is off.

Abstract: An improved nitric acid only nitration process wherein the improvement comprises adding an effective amount of a nitration promoting acid anhydride to the reaction mixture to enhance the rate of nitration.

Abstract: An improved apparatus and method for providing uniform fin-type back seals with flexible packaging material for use in conjunction with form-fill-and-seal machines is disclosed which utilizes a moveable tucker plate disposed between the mated edges of the flexible packaging material and the body of the packaging material. When sealing, the tucker plate moves against the body of the packaging material and prevents lateral movement of such material during the sealing operation. The tucker plate is joined to a sealing platen in a manner which maintains a fixed distance between the tucker plate and the sealing platen until a threshold sealing pressure is exceeded.

Abstract: Tetrahydrofuran is recovered by a two stage distillation procedure from a crude hydrogenation product resulting from vapor phase hydrogenation of diethyl maleate and containing water, ethanol and a minor amount of n-butanol, and possibly also dissolved hydrogen, in addition to butane-1,4-diol, gamma-butyrolactone and "heavies" such as diethyl ethoxysuccinate. In the first distillation stage, conveniently operated substantially at atmospheric pressure, ethanol, water, and tetrahydrofuran are recovered as overhead product, are condensed to separate the condensible components from a hydrogen stream which can be vented, and then redistilled in the presence of a molar excess of a hydroxylic solvent containing at least two hydroxyl groups, such as butane-1,4-diol, in a second distillation zone.

Abstract: Pumpable, edible fillings are produced from vegetable shortening having a Wiley melt point from 90.degree. F. to 120.degree. F. and a solid fat index from 1% to 6% at 92.degree. F. and at 100.degree. F., a solids extender, and solid flavoring materials by a method which carefully controls the crystal structure of the vegetable shortening and the particle size of the solid flavoring material.

Abstract: A digital signal processor comprises a bus structure including a program bus, data bus and data input/output bus, a program memory, a program controller, an internal data memory made up of a plurality of 2-port memories for storing block data, an arithmetic operator, a DMA controller for implementing block data input/output between the internal data memory and an external data memory in parallel to an internal operation by the arithmetic operator, an address generator for generating addresses for the internal operation and DMA transfer concurrently and in parallel to the internal operation, and parallel data input/output ports for implementing parallel data communication with an external device independently of input/output operations and in asynchronous fashion. The processor executes an intricate adaptive process algorism such as image signal processing at high speed and at high throughput.

Abstract: A coal fired power plant includes a coal gasification zone where coal is gasified in the presence of an oxidant-lean atmosphere under partial coal gasifying conditions to produce a carbonaceous char and a crude gas stream, an acid separating zone where sulfur-containing compounds are separated from the crude gas stream to produce a combustible gas stream, and a converting zone where the sulfur-containing compounds are converted to elemental sulfur. The combustible gas stream and the carbonaceous char are fed into a boiler which drives a generator to produce electricity; portions of the carbonaceous char product and the combustible gas stream are diverted into a gypsum desulfurization zone. SO.sub.2 -containing flue gas from the boiler is fed into a flue gas desulfurization zone. There, the SO.sub.2 -containing flue gas is contacted with lime and limestone to produce gypsum.

Abstract: Disclosed is a process for continuous preparation of aromatic diazonium fluoride salts wherein diazotizable aromatic primary amines are continuously diazotized in a reactor containing a plurality of sequential reaction zones, wherein a portion of the diazotization agent is continuously injected into each of the reaction zones.

Abstract: A process for producing 2-halofluorobenzene from 2,4-dihalofluorobenzenes comprises treating an aqueous slurry of 2,4-dihalofluorobenzene with hydrogen at an elevated temperature in the presence of a transition metal supported on a carbon catalyst. The process produces a mixture including fluorobenzene and 2-halofluorobenzene. The 2-halofluorobenzene can be separated from the mixture by conventional means such as distillation. Optionally, the fluorobenzene also can be recovered.