Abstract: Alternating layers of N+ GaAs (80 .ANG.) and N+ Ga.sub.1-x Al.sub.x As (300 .ANG.), all heavily doped with a uniform flux of Sn, and biased by 2V, provide a multiple quantum-well heterojunction structure for infrared detection with cutoff wavelength established by the choice of the value x which defines the depth of the wells. Fine tuning of the cutoff wavelength may be achieved by varying the bias voltage. By biasing the individual quantum-well layers progressively through a voltage divider, an avalanche mechanism may be achieved in the detector for signal amplification. The detectors may be fabricated in large two-dimensional arrays.

Abstract: This invention is a method and an apparatus for surgical irrigation, aspiration and illumination comprising a cooperative irrigation, aspiration and illumination system wherein the three functions are cooperatively performed at the actual surgical area during surgery. A single hand-held instrument capable of simultaneously and cooperatively providing light, irrigation and aspiration in a single and simultaneous act is utilized in a preferred method of practicing this invention. The light flows around the aspiration tip, which in turn carries the irrigation member. The amount of irrigation and aspiration is controlled by a one-hand operation of the surgeon or other operating room attendant.

Abstract: A door lock system is described of the type wherein the solenoid that includes a plunger retractable from a latch hole, can be manually slid away from the latch hole. The solenoid coil is mounted on a slideable bracket by leaf springs with bent ends, that permit the coil to pivot when the plunger is forced against a side of the latch hole.

Abstract: A positive feed drill having a spindle drive gear train and a spindle feed gear train coupled to the drive gear train by side teeth on coupling gears mounted on the same shaft is provided with actuatable means for uncoupling the feed coupling gear from the drive coupling gear, and locking it when the spindle has been fed a predetermined extent, thereby retracting the spindle, and for unlocking the feed gear train, once the spindle is retracted, without recoupling it to the drive gear train, thereby holding the feed gear train in an idle mode until the automatic means is manually reset.

Abstract: An integrated laser structure for paired stripe semiconductor lasers is provided with separate current control of each stripe laser. With optical coupling between the lasers, one of the lasers is operated below threshold and serves the longitudinal mode selection and tunability of the other laser, thereby to obtain a single longitudinal mode operation. Without coupling, the paired-laser structure operates as a source of two independent wavelengths.

Abstract: A communication controller for facilitating bidirectional digital data transfers between a host processor and various types of networks. The controller architecture is characterized by multiple independent data transfer buses coupled to a central multiple port random access memory. The architecture avoids microprocessor bus contention in favor of RAM contention and thus enhances aggregate system throughput. Moreover, the buses are capable of performing operations concurrently to thereby further enhance system throughput.

Abstract: A hologram is recorded on a recording medium with polarized, monochromatic and incoherent light by passing the light from image points through an anisotropic medium and a polarization analyzer. A difference in phase retardation occurs for each of orthogonally polarized ordinary and extraordinary light waves which set up a transfer function of diffraction pattern at the film for recordation. The image can be reconstructed with monochromatic light passed back through the recording system, or with coherent light by illuminating the film directly to form the image on the opposite side at a position in space corresponding to the original point of the image recorded.

Abstract: A method is described for testing equipment to determine whether it will continue to function when in the presence of a sodium fire, which is of much less cost than prior testing methods. The method includes spraying sodium monoxide on the equipment while it lies within an enclosure. The sodium monoxide is a fine powder, and the moisture within the chamber is maintained at a high level which is much above 20%. The moisture turns the sodium monoxide to sodium hydroxide, or lye, which is the most damaging component of a sodium fire.

Abstract: A vehicle suspension is described for a vehicle whose frame is supported through leaf springs lying on the axles, which avoids reverse bending of the springs while also providing a smoother ride. The system includes an air sleeve having an upper end mounted on the vehicle frame and a lower end bearing against the top of the leaf spring at a location between the axle and the front of the spring. The distance between the axle and the air sleeve is about 38% of the total distance between the axle and the front of the spring where it is connected to the frame, this spacing having been found to provide maximum shock absorption and smoothness of ride.

Abstract: A high conductivity, n-doped semiconductor film is produced from zinc, or Zn and Cd, and group VI elements selected from Se, S and Te in a reactive magnetron sputtering system having a chamber with one or two targets, a substrate holder, means for heating the substrate holder, and an electric field for ionizing gases in the chamber. Zinc or a compound of Zn and Cd is placed in the position of one of the two targets and doping material in the position of the other of the two targets. Zn and Cd may be placed in separate targets while a dopant is placed in the third target. Another possibility is to place an alloy of Zn and dopant, or Zn, Cd and dopant in one target, thus using only one target. A flow of the inert gas is ionized and directed toward said targets, while a flow of a reactant gas consisting of hydrides of the group VI elements is directed toward a substrate on the holder. The targets are biased to attract negatively ionized inert gas.

Abstract: A sawhorse having a tool tray with a storage space for holding tools and four legs that are attached to the tool tray. The handle of the tool tray is the working surface of the sawhorse and the legs raise the handle to the desired height above the floor. The four legs are removable from the tray to facilitate transportation of the sawhorse. A wide flat surface is provided on the top of the handle that allows the balancing and clamping of a work piece horizontally on the sawhorse. The ends of the handle are flush with the outer surfaces of the legs. The legs are bolted to the outside of the tool tray vertical to the ground allowing the placement and clamping of a work piece to the sawhorse ends vertical to the ground.

Abstract: A backing for quickly and inexpensively affixing a title label to a comb binding without special equipment to yield a neat professional looking product. The backing is preferably comprised of a transparent U-shape strip secured to the comb binding and a U-shape label strip adapted to be retained between the backing strip and comb binding spine.

Abstract: Color picture resolution is improved in a color television display system by threshold detecting the luminance signal, and, in response to the threshold detected luminance signal, switching the color signals off when the luminance signal is below a predetermined threshold level. Nonlinear amplifiers which couple the color signals to the display system are provided with gain that decreases as signal amplitude increases to restore color signal pulses to a form commensurate with the luminance signal fast rise and fall times.

Abstract: A method and apparatus are disclosed for increasing vertical resolution of television and eliminating vertical aliasing by modulating vertical deflection of the camera a significant number of cycles per line, and modulating the vertical deflection of the display unit in phase with the modulation of the camera while displaying the video signal transmitted. The display unit is provided with its own modulating oscillator operating at the same stable frequency as the modulating frequency of the camera, and phase synchronized by information transmitted by the camera. In the case of NTSC color television, the vertical deflection modulating oscillator of the camera is the color modulating oscillator, and the vertical deflection modulating oscillator of the receiver is the oscillator used for color demodulation phase synchronized by color bursts gated during blanking periods of each frame.

Abstract: An improved orthodontic appliance of the type generally referred to as headgear, for applying a force to a tooth to move the tooth bodily and/or rotationally, and for pushing outward the cheek to encourage spontaneous jaw growth. The appliance comprises an outer bow intended to be retained adjacent the user's face by a neck strap and an inner bow attached to the outer bow intended to fit within the user's mouth proximate to his cheeks. The inner bow includes left and right activating arms, which arms include shoulder portions to push the cheeks outwardly, and which arms also include noncircular engagement means adapted to fit snugly within tubes fixed to a left and a right rear tooth. The activating arms are formable and sufficiently resilient that they can be selectively deformed to apply a force to the teeth to achieve the desired movement.

Abstract: A game table having a base with four corner holes, to form the corners of a rectangle. The base also has two side holes, in the center of each side of the rectangle. There are four corner pocket pieces with a pair of ends. Each corner piece has an opening which can be positioned above and aligned with one of the center holes. There are also two side pocket pieces with a pair of ends. Each side pocket piece has an opening which can be positioned above and aligned with one of the side holes. In addition, there are two end rails and the ends of each rail engage the ends of two corner pocket pieces. There are also four side rails and the ends of each side rail engage the end of a corner pocket piece and the end of a side pocket piece. There are two end bumpers, each being attached to two corner pocket pieces and an end rail. Four side bumpers are provided, and each is attached to a corner pocket piece, a side pocket piece, and a side rail.

Abstract: A portable screen of fabric is held upright by a plurality of hollow poles clamped to the fabric by C clamps, preferably one the length of the pole. A stake is telescoped within each hollow pole, and held in an extended position (to adjust the height of the screen) by the friction of a resilient sleeve near the top of the stake, and additionally by a C clamp around the stake adjusted up against the pole. Straps are provided to secure the screen in a rolled up condition, and to carry the rolled up screen.

Abstract: A membrane pack is constructed, which includes a highly porous carrier sandwiched between a pair of membrane structures that must be kept continuously wet, the pack having a hole and being sealed around the hole to prevent the passage of polluting liquid lying in the hole, into the porous carrier of the pack. The membrane pack is constructed by impregnating the carrier with a flowable polymer which can solidify, to leave a thin layer of the polymer on either surface of the carrier, and by then welding the polymer layers to membranes at either face of the carrier. Ultrasonic welding of the membrane structures to the carrier is performed while the membrane structures are wet, the ultrasonic welding dissipating moisture lying at the interface between the carrier and membrane structures to permit even hydrophilic polymers to be utilized.

Abstract: An apparatus for automatically processing film discs including a transport system for moving the discs through successive processing stations and a friction drive system for spinning the discs at each station for agitation and/or drying. The transport system utilizes a unique carrier spindle having a nipple on one end thereof upon which a group of film discs is removably mounted. The transport system successively transports a loaded carrier spindle from one processing station to the next. At some stations the carrier spindle is positioned so that the film discs carried thereby enter a liquid tank thereat and at other stations the spindle is positioned to facilitate disc drying. The friction drive system includes a drive belt which frictionally contacts the carrier spindle at each station for spin agitation and/or drying.