Abstract: There is provided a method of parking a hard disk drive head, which can minimize an impact during head parking using an alternating current (AC). This method includes the steps of: determining whether no command is input during a predetermined time in a wake-up mode, or whether a power-off command is input; and moving the head to a parking area by driving an actuator to which the head is attached using an initially-set alternating current, if no command was input during the predetermined time or a power-off command was input. Accordingly, damage to the head and head suspension, caused by the collision of the head with a latch magnet because of an excess acceleration of the actuator during parking, can be prevented.

Abstract: An electrophotographic processor containing an image forming apparatus such as a laser printer, a copying machine, and a facsimile machine, is capable of regulating the thickness of toner layer formed on a developing roller so as to be a mono-layer. The electrophotographic image forming apparatus includes: a photosensitive drum rotating at a constant speed; a charging roller for charging a surface of the photosensitive drum; a developing roller for forming a toner image on a electrostatic latent image of the photosensitive drum by transferring toner from the developing roller to the drum; a supplying roller for supplying toner agitated by an agitator; and a doctor blade for regulating the toner layer on a developing roller device so as to be a uniform thickness. The doctor blade contacts the surface of the developing roller at a specific edge thereof, and is affixed to a bracket for supporting the doctor blade at an upper portion thereof, the bracket being affixed to a frame of a developing unit.

Abstract: A computer case is disclosed that allows a user to open and close the case without the use of special tools or screws. Instead, a user simply slides two sliders on the cover of the case towards each other and simply lifts up the front portion of the cover to gain access to the interior of the case. The slider is monolithically integrated to a latch. The latch contains two spaced-apart arms about a recess. One of the arms of the latch is arcuate so as to guide a portion of the base and a portion of a cover that are slightly separated into the recess so that both portions are mated snugly preventing inadvertent opening of the case. This snug mating can be accomplished by simply sliding a pair of slider in the proper directions. To disengage the cover from the base, the sliders are slid in the opposite directions releasing a portions of the base from contact with a portions of the cover. When the case is released, the front of the cover can be lifted up.

Abstract: A floating torch burning polydimethylsiloxane to provide a decoy over the termediate infrared spectrum of a ship.

Abstract: A controlled environment process for making diode arrays by depositing the sublimate of a semiconductor material through an aperture of a mask placed nearby a substrate and then subjecting part of the sublimate to ion implantation. The aperture causes diffraction of the sublimate vapor stream, while the proximity of the edges of the aperature to the substrate causes the central plateau of the deposited thin-film to have a rounded rim leading to sides that taper smoothly in thickness to the substrate. Ion implantation to a controlled depth creates an isolated planar junction. Surface layers of a gold electrode running onto the substrate from different surface areas of the thin-film provide for off-mesa bonding of electrical leads.

Abstract: A variable temperature method for the preparation of single and multiple taxial layers of single-phase (e.g., face-centered cubic), ternary lead chalcogenide alloys (e.g., lead cadmium sulfide [Pb.sub.1-w Cd.sub.w ].sub.a [S].sub.1-a wherein w varies between zero and fifteen hundredths, inclusive, and a=0.500.+-.0.003), deposited upon substrates of barium fluoride, BaF.sub.2, maintained in near thermodynamic equilibrium with concurrently sublimated lead alloy and chalcogenide sources. During preparation, the temperature of the substrate is varied, thereby providing an epilayer with graded composition and predetermined electrical and optical properties along the direction of growth. This growth technique can be used to produce infrared lenses, narrowband detectors, and double heterojunction lasers.

Abstract: A process and a small, sensitive, low noise, high gain, power amplifier used in the process, for exploiting the anisotropic magnetoresistance effect in a ferromagnetic thin-film. The magnetization of the thin-film is biased to lie along the hard axis. The amplifier is configured so that a sensing current in the thin-film flows at an angle of forty-five degrees to the nominal direction of magnetization, and the current to be amplified produces a magnetic field parallel to the easy axis of the thin-film.

Abstract: Device for causing projectiles to detonate at the optimum point along their ndividual trajectories when fired at nearly any type of target. Detonation at this point will result in the greatest damage to the intended target.

Abstract: A magnetic crosstie memory using a plurality of Permalloy thin-film strips of uniform thicknesses having parallel denticulated margins etched to align with the oblong axis of the strip. Each pair of opposite denticles defines a distinct memory cell. Magnetization relaxes upon removal of a magnetic field applied normal to the oblong axis of the thin-film with each component assuming that orientation requiring the least rotation for parallel alignment with the least distant edge. Two domains are thus formed with a domain wall suitable for storage and propagation of binary information centered between the margins and extending the length of the strip. Crossties form at the necks of the serrations and Bloch lines are positioned in potential wells between the necks. Binary information, represented by the crosstie and Bloch lines in various conventions is propagated along the domain wall from cell to cell by particular sequences of magnetic pulses.

Abstract: A thin-film single-crystal infrared detector exhibiting an increased freqcy of response. A closed transverse junction, formed by diffusing a central electrode of an impurity rich metal into a lead-salt film epitaxially grown on an insulating substrate, provides an effective optical area in excess of the junction surface. An ohmic contact is spaced apart from the central electrode. Junction capacitance, a limitation upon the electrical response, is diminished by the detector geometry while detectivity is enhanced. In an alternative embodiment the detector may be segmented to provide directional detection.

Abstract: A variable temperature method for the preparation of single and multiple taxial layers of single-phase (e.g., face-centered cubic), ternary lead chalcogenide alloys (e.g., lead cadmium sulfide, [Pb.sub.1-w Cd.sub.w ].sub.a [S].sub.1-a wherein w varies between zero and fifteen hundredths, inclusive, and a=0.500.+-.0.003), deposited upon substrates of barium fluoride, BaF.sub.2, maintained in near thermodynamic equilibrium with concurrently sublimated lead alloy and chalcogenide sources. During preparation, the temperature of the substrate is varied, thereby providing an epilayer with graded composition and predetermined electrical and optical properties along the direction of growth. This growth technique can be used to produce infrared lenses, narrowband detectors, and double heterojunction lasers.

Abstract: An amorphous film (44) of a photoresponsive semi-conducting material such germanium-telluride deposited upon a thick silicon dioxide layer (40) formed on a silicon chip substrate (38). The silicon chip (38) underlying the central region of the amorphous film (44) is etched through to the silicon dioxide layer (40) to define a trough (48) thermally isolating the central region of the silicon dioxide layer (40).

Abstract: An apparatus for igniting a squib attached to the base of an ordnance round hrough a two part inductive type of device having one part that is attached to the base of the ordnance round and axially insertable into a second part which is mounted at the bottom of a launching tube. The two parts are inductively coupled via an air gap.

Abstract: A symmetric narrow-wide electrical conductor for propagating binary information represented by Bloch line - crosstie pairs along a serriform crosstie thin magnetic film strip. Another conductor is made with alternate segments disposed upon opposite surfaces of the crosstie strip.

Abstract: A magnetoresistance detector linearly stretching single bits of binary inmation such as those represented by Bloch line - crosstie pairs, along the major dimension of a thin magnetic film strip such as a serriform crosstie memory. The detector circuit is overlaid upon the thin magnetic film strip. In a selected area, less pronounced serrations in the adjacent margins, in conjunction with a magnetic field created by current through the detector circuit enable Bloch lines entering the area to travel farther. A series of oriented open segments in the overlain section of the detector circuit, arranged in symmetric correspondence with serrations in the adjacent margins, enhances the difference between logical zero and one signals in the detector circuit.

Abstract: A conformal antenna having a microstrip patch centered below a slot in a undplane and covered by a dielectric window and coupled to a stripline feed.

Abstract: A passive opto-electric rangefinder with remotely controllable index mirr independently rotatable about normal axes, each axis perpendicular to the line-of-sight.

Abstract: A distributed feedback optical device using a single crystal boule prepared with periodic spatial striations of ternary Pb.sub.1-x Sn.sub.x Te and Yb impurity atoms forming a layered array of planar p-n junctions normal to the axis of light emission. Crystal surfaces parallel to the axis are coated with a reflective, electrical insulator. Free scattering losses are minimized by applying a magnetic field along the longitudinal axis.

Abstract: Improved magnetostrictive materials are combined in a novel arrangement to provide a transducer of the electromechanical type particularly suited for the precise control of fluid flow. An embodiment according to this invention comprises a valve assembly having a discharge ported, cylindrical housing of a material exhibiting positive magnetostriction, a plunger of a material exhibiting negative magnetostriction disposed within the housing, the plunger provided with a tapered nose initially in close fitment within the discharge port to restrain the flow of fluids, and means to create a magnetic field around the assembly. As the materials are exposed to the magnetic field the housing expands relative to the contracting plunger, causing the plunger to separate from close, seated fitment within the discharge port, thereby allowing flow through the port. One of the materials may be selected from a non-magnetostrictive material.

Abstract: A thin-film single-crystal infrared detector exhibiting an increased frequency of response. A closed transverse junction, formed by diffusing a central electrode of an impurity rich metal into a lead-salt film epitaxially grown on an insulating substrate, provides an effective optical area in excess of the junction surface. An ohmic contact is spaced apart from the central electrode. Junction capacitance, a limitation upon the electrical response, is diminished by the detector geometry while detectivity is enhanced. In an alternative embodiment the detector may be segmented to provide directional detection.