Abstract: An improved microwave radar antenna including a plurality of linear waveguides arranged in a two dimensional array with each linear waveguide having a mounting flange along the bottom narrow edge of the waveguide for attachment to the ground plane of the antenna by the conductive epoxy. Also disclosed is a method of manufacturing an improved microwave antenna where flanged linear waveguides are milled to provide for radiator slots and then are affixed to a attentive ground plane along the flanged edge of the waveguide by a conductive epoxy.

Abstract: An improved fly by wire or fly by light system which provides for a smooth manual override of the autopilot function by allowing the pilot to modify the autopilot command to the control surfaces by physically manipulating the yoke to a position different than that commanded by the autopilot.

Abstract: An improved air traffic control (ATC) system which utilizes traffic alert and collision avoidance systems (TCAS) as a component together with a flight control computer of an aircraft autopilot, a data radio and an interactive touch screen display device to produce a system for allowing easy trailing of another aircraft on trans-oceanic flights and to reduce landing delays at busy airports under IFR conditions.

Abstract: A high integrity data communication system for use with critical aviation information on a single transmission line which also utilizes code generators at the transmitter and receiver ends together with means for comparing the outputs of the code generators thereby authenticating the information at the receiver end.

Abstract: A primary flight display having a vertically oriented linear scale format altimeter therein which includes a non-numbered coarse tape-like image area, for displaying markings relating to altitude and a fine scale tape-like image area juxtaposed with said coarse tape-like image area said fine scale image area for displaying numerals in vertical translational movement and a central current altimeter reading with at least part of the reading disposed about said coarse scale image area.

Abstract: A method and apparatus for drawing high quality lines on color matrix displays wherein a line segment is created by activating a series of linear elements substantially centered about the predetermined line segment position and providing for various intensities for each element, the notion of a pixel group is completely discarded and each individual display element is individually addressed and individually assigned an intensity depending upon the predetermined line segment to be displayed and the orientation of that line segment wherein the method comprises generating element intensity, position and line slope information for a given line segment; inverting and registering the element intensity information; centering an array of elements around the element position information; determining the color of elements in the array of elements; determining the proper intensity for each element in the array of elements in order to produce the predetermined position of the line; and providing the proper intensity for

Abstract: A rail vehicle positioning system having a plurality of inputs used to generate a position report including a GPS receiver, a wheel tachometer, O.S. circuits, transponders, and manual inputs from locomotive engineers.

Abstract: A method and apparatus for performing ultrasound rectal examinations, by providing an ultrasound transducer which is slipped over the physician's finger tip and then inserted into the patient's rectum, together with an apparatus for guiding medical instruments into the area to be imaged.

Abstract: A digital data system which includes a passive coupler from a transmission line and a clock recovery device and a sample pulse generator coupled with the clock recovery device to generate sample pulses in relation to the recovered clock signal and a comparator device for comparing the sample pulse signal with the signal received from the passive coupler.

Abstract: A system and method for monitoring and reporting out-of-route mileage for long haul trucks which includes transmitting route data from a dispatcher to a distant truck where comparisons aboard the truck are made of its current position with predetermined acceptable positions and exception reports are generated and transmitted back to the dispatcher from the truck if the current position is not included in the set of predetermined acceptable positions.

Abstract: A disposable needle guide for ultrasound transducers having a means for coupling with a transducer and a multi-slotted, removable insert for receiving and guiding needles of various gauges.

Abstract: A weather radar system having improved display characteristics for rotation and translation of weather data where the rotations and translations are accomplished by converting data in a dedicated polar coordinate memory to display memories. The translation and rotation of the data between data updates is accomplished by referring to the data stored in the dedicated polar coordinate memory and thereby generating new rotated or translated data without requiring a manipulation plate of the data in the display memories.

Abstract: The range of a weather radar systems (60) is automatically extended by incrementally increasing the pulse width (17) from transmitter (12) in response to detecion of excessive path attenuation determined by a comparator (32) comparing the level of actual attenuated return pulses (19) from a range correction accumulator (34) with a path attenuation compensation level selected by a computer (26). The bandwidth of the receiver (14), the value in an initial sensitivity time control value circuit (54), the value in a path attenuation compensation correction value circuit (62) and the path attenuation correction alert threshold are also selectively varied automatically in accordance with the incremental changes in the width of transmitted pulses (17).

Abstract: An autopilot with long term yaw coordination capabilities which utilizes lateral acceleration to generate a rudder force command which is combined with the sensed rudder force to create an error signal which is combined with a rudder servo velocity signal and then integrated to create a virtual rudder position feedback signal for combination with the rudder position commands, generated from yaw rate information.

Abstract: A high power solid state semiconductor fiber optic ring laser which includes an optical amplifier diode having its waveguide region oriented at an angle between Brewster's angle and 0.degree. with respect to the normal to the diode cleavage planes together with antireflection coatings disposed on the diode cleavage planes. The optical amplifier diode being optically coupled with the ends of an optical fiber.

Abstract: A wide viewing angle avionics liquid crystal display is disclosed which utilizes a planar holographic optical element collimator disposed between the liquid crystal panel and the back light source. Also disclosed a method and apparatus for manufacturing a planar holographic optical element collimator.

Abstract: A holographic optic element collimator and method in apparatus for its manufacturer is disclosed where the holographic optic element collimator consists of a holographic recording medium with an interference pattern recorded thereon from an incident collimated reference beam and an off access coherent object beam which has a variable angle of incidence with respect to the holographic recording medium.

Abstract: Digitial audio data transmission technique which utilizes time division multiplexed messages, for transmitting information from point A to point B, while having intermediate points therebetween for augmenting the information without completely demodulating and remodulating the entire signal at each intermediate point. The technique comprises generating a clock signal having a plurality of pulses therein which are separated by a plurality of expansion regions. The expansion regions are utilized for containing the data information and the presence or absence of a pulse in the expansion region represents the message. Initially, the clock information and a message information is transmitted from point A along with a portion of the transmission containing clock information only and no message information.

Abstract: A method in circuit for controlling the temperature of IMPATT diodes during pulsed operations: first, by providing a switch of the RF energy produced by the IMPATT for switching the IMPATT output from an antenna to an internal load, the switch being a pin diode switch; secondly, switching the output of a pair of IMPATT diodes from an antenna to an internal load by providing a selective phase shifter for shifting the phase of the injection signal to one of the IMPATT diodes and further providing a hybrid coupler at the output ends of the IMPATT diodes and disposed between the antenna and the internal load; thirdly, providing a pair of injection signal sources which operate on different frequencies and alternately switching the separate injection sources with the input end of an RF producing IMPATT diode; and fourthly, providing a positive biased pre-heat current pulse to the RF producing IMPATT.

Abstract: A liquid crystal display having enhanced viewing brightness and brightness uniformity which utilizes a plurality of reflective dots disposed on the lamp side of a diffuser which is positioned between a back lamp and the viewing surface so that light emitted from the back lamp is reflected off of the reflective dots back to a reflector assembly positioned behind the back lamp and is then reflected back toward the light diffuser in a direction toward the viewing surface.