Abstract: A night vision aid such as night vision goggles (13) is made compatable with a local full color display (17) by blocking local display light from being received by the night vision aid (13). A circular polarizer (23) of one left/right sense is positioned so as to filter the local display. A circular polarizer (25) of an opposite sense is placed before a light input of the night vision aid (13), thereby preventing the polarized light from the display (17) from entering the night vision aid (13). Advantageously, the circular polarizer (23) on the display has minimal effect on linear polarizers which may be used with eyeglasses.

Abstract: A wide agricultural implement includes a pair of pivotally interconnected frame sections which allow the implement to better follow the contour of the ground. Each frame section is supported by vertically adjustable wheels and a master/slave hydraulic system is employed to adjust the wheels.

Abstract: The threshed material passing through the foraminous cage and concave of the processor section of the combine falls by gravity to a distribution auger in a trough at the bottom of the processor housing. The threshed material passes through a slot in the trough to a pair of accelerator rolls which throw the threshed material downwardly to the cleaning section of the combine. In order to help the distribution auger to distribute the threshed material to the slot whereby the threshed material is spread along the trough and discharges at a relatively even flow rate along the length of the slot, one or two movable trough extensions are added to reduce the width of the slot along a portion of its length.

Abstract: A seed singulator for an agricultural planter uses a housing with a seed cavity to which seed and compressed air is delivered and a disc with seed pockets which, in rotating, pick up seed kernels from the seed cavity and drop them at equally spaced intervals. A wear ring prevents the rotating disc from wearing the singulator housing and a resilient air cutoff pad has radial extensions which extend between sealing surfaces on the housing and the wear ring whereby seeds are prevented from wedging between the air cutoff pad and the side walls of the groove in which the pad is installed. The trailing edge of the air cutoff pad has coplanar segments in angular relation to one another which serve to accurately space the seed when using a seed disc with multiple annular rows of seed pockets.

Abstract: An apparatus and method for casting metal strip includes a moving chill body that has a quench surface. A nozzle mechanism deposits a stream of molten metal on a quenching region of the quench surface to form the strip. The nozzle mechanism has an exit portion with a nozzle orifice. A depletion mechanism supplies a reducing gas to a depletion region located adjacent to and upstream from the quenching region. The reducing gas reacts exothermically to lower the density to provide a low density reducing atmosphere within the depletion and substantially prevent formation of gas pockets in the strip.

Abstract: A high pressure vortex fuel injector comprising a hollow housing or body including a plurality of passages at least one of which is adapted to receive fuel through an inlet. The injector also includes a passage for guiding the piston into seating relationship with the valve seat to control the flow of fuel through the metering orifice and a solenoid assembly for moving the piston relative to the valve seat. The injector further includes a swirl or vortex chamber, to angularly accelerate the fuel, formed in cooperation with the first surface of the valve seat. The injector additionally includes passages for permitting fuel to circulate about an electric coil thereof, thereby cooling same during instances when the metering orifice is closed. The injector further includes passages within the swirl chamber for assisting in the rapid formation of a conical spray pattern upon the opening of the metering orifice.

Abstract: A keyless entry system has means for defining an interrogation zone. A marker responsive within the interrogation zone to generate a coded signal cooperates remotely with means for disengaging a locking mechanism upon verification of the coded signal when received.

Abstract: Crude phenol, containing AMS by-product, and MBF impurity, is distilled in the presence of water to separate MBF impurity.

Abstract: A probe polynucleotide binds to a target nucleotide sequence in the nucleic acid of a biological sample, and then is enzymatically extended in the 3'-direction with a mixture of nucleoside triphosphates including at least one nucleoside triphosphate that has been detectably labeled. After separating extended hybrid from unreacted nucleoside triphosphates, detectably-modified nucleotides which have been incorporated are determined. In some forms, the 3'-terminal nucleotide of the probe polynucleotide is selected to form a matched pair with some sample strands, but a mismatched pair with other sample strands. In such cases, if the primer dependent enzyme used for extension is one lacking 3'-exonuclease activity, then only those hybrids forming such a matched pair will be extended and subsequently determined.

Abstract: A cable wiper assembly for airborne sonar includes a housing suspended from a hoist used to rapidly raise and lower a sonar transducer at the end of a cable. The wiper assembly is interposed ahead of the cable-directing sheaves forming part of the hoist to strip away the sea water which adheres to the cable as it is pulled from the ocean. The cable wiper housing includes a series of internal grooves each of which contains and secures one wiper stage. Each stage includes a washer-like wiper of elastomeric material whose internal diameter is just slightly smaller than the cable diameter carried in a shallow cup-shaped holder having an internal port significantly larger than the cable diameter and secured by means of an upper washer-member overlying the wiper whose internal diameter is slightly larger than the diameter of the cable.

Abstract: A pair of plastic skid plates are secured to the underside of skid pads at opposite lateral ends of a floating cutterbar and are connected at their forward ends to the dividers, at laterally opposite ends of a combine header, by elastic connectors.

Abstract: A fuel nozzle for injecting atomized fuel inot an air stream at an adjustable angle with respect to its longitudinal axis is described incorporating a support flange, a fuel supply tube, a nozzle tip body at the end of the fuel supply tube and a sheath between the support flange and the nozzle tip body for directing air to the nozzle tip body. A second sheath enclosing the first sheath is provided wherein each has a slot opening which may be positioned with respect to the support flange for admitting air into and where the size of the opening may be controlled by rotating the outer sheath with respect to the inner sheath to provide an adjustable overlap of the slot openings. The invention overcomes the problem of injecting fuel into the combustor of a jet engine at an angle which may be adjustable over a predetermined range to enhance combustion of the fuel.

Abstract: A positive photoresist metal ion aqueous developer is provided that gives a high contrast to the photoresist.The developer disclosed comprises a formulation of aqueous alkali-base such as potassium hydroxide and a carboxylated surfactant. The incorporation of the carboxylated surfactant provides the unexpected increase in the contrast of the photoresist. The addition of the carboxylated surfactant increases the gamma from a typical photoresist gamma (.gamma.) of 3 or less to a gamma greater than 5.The high contrast photoresist provides linewidth control and affords improved process latitude in photoresist imaging. The linewidth control is particularly critical in cases where fine lines are to be defined in the resist that covers steps of topography on the coated substrate. The higher the contrast, the less affected the resist by the topography, provided the exposure is adequate to expose the resist.

Abstract: A backing plate assembly for a drum brake includes a first part adapted for attachment to a vehicle frame and a second part releasably coupled to the first part. The second part is made of a material that effects substantial noise reduction in the assembly and the second part is tightly frictionally coupled to the first part. The second part sees no braking torque and is coupled to a reinforced portion of the first part.

Abstract: A method and system, including a valve (32) for controlling the amount of fluid purged from a cylinder (12) of a two-cycle engine prior to the combustion of an air-fuel mixture within the cylinder especially during low demand periods of engine operation. The system including a throttle (26) disposed upstream of an inlet port (14) and controlled to be maintained in an open condition during such intervals. The valve (32), which is adapted to communicate with a scavenge port (30) includes a piston (80) that is movable relative to an aperature (76) in response to a pressure differential created in part by the operation of a cooperating electromagnetic valve (54), such that when the piston is moved to uncover the aperture a predeterminable amount of fluid within the cylinder can be purged therefrom as the cylinder piston is moved through its compression cycle.

Abstract: A linear hydraulic motor includes a piston rod of conventional steel carrying a fragible piston head movable in a cylinder, the head being designed to break away in the event the cylinder wall is punctured and deformed such that a portion of the cylinder wall becomes an obstacle in the path of the piston. Two or more such motors are frequently connected redundantly to one control surface such that if one motor is damaged, the other can continue to perform its function. The piston head is of a brittle metallic matrix material and includes a conventional seal groove formed on its cylindrical surface.

Abstract: A high pressure vortex fuel injector comprising a hollow housing or body including a plurality of passages at least one of which is adapted to receive fuel through an inlet. The injector also includes a passage for guiding the piston into seating relationship with the valve seat to control the flow of fuel through the metering orifice and a solonoid assembly for moving the piston relative to the valve seat. The injector further includes a swirl or vortex chamber, to angularly accelerate the fuel, formed in cooperation with the first surface of the valve seat. The injector additionally includes passages for permitting fuel to circulate about an electric coil thereof, thereby cooling same during instances when the metering orifice is closed. The injector further includes passages within the swirl chamber for assisting in the rapid formation of a conical spray pattern upon the opening of the metering orifice.

Abstract: A wide farm implement is provided with a swingable tongue which permits endwise to and from fields. A pair of transport wheels are provided for supporting the implement for endwise transport and the support wheels, on which the implement is supported during a field working operation, are raised so as not to interfere with endwise transport. In order to prevent the automatic lowering of a row marker when the support wheels are thus raised relative to the frame, a blocking valve is provided in the row marker hydraulic circuit which moves to its closed position when the tongue is moved from its field working position thereby preventing lowering of the row marker.

Abstract: An RNA signal strand is displaced from a probe strand by a target nucleotide sequence. Without separation, a digestion enzyme selective for displaced RNA, e.g., a polynucleotide phosphorylase, digests the displaced RNA to nucleoside phosphates including ADP. The digestion products are detected, e.g. by phosphorylating the ADP to ATP and detecting the ATP by bioluminescence.

Abstract: A magnetic theft detection system marker is adapted to generate magnetic fields at frequencies that (1) are harmonically related to an incident magnetic field applied within an interrogation zone and (2) have selected tones that provide the marker with signal identity. The marker is an elongated, ductile strip of amorphous ferromagnetic material having a value of magnetostriction near zero that retains its signal identity under stress.