DEPARTMENT OF THE AIR FORCE WASHINGTON D C

27 MAR 1979

Authors: Edwin W. Rumrill Jr.; Frank D. Lewis Sr; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

The full text of this report is not available and therefore is not for sale. This information is provided for reference purposes only.

A pilot operated stepping valve where an electrical pulse motor drives a pilot valve spool which controls the flow of hydraulic fluid driving a main valve spool which actuates a hydraulic motor or actuator. The main valve spool follows the pilot spool and is hence sensitive to the pulses received by the pulse motor. (Author)

Simplified High Accuracy Guidance System.

27 MAR 1979

Authors: Robert L. Schultz; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A simplified guidance system for air-to-air missiles where the pilot adjusts his helmet sight to compensate for missile errors and this information is fed to a computer which computes correction data from error information, aircraft position information and missile position information, correction data is then sent via a radio link to the missile control system which changes the flight path accordingly. (Author)

Boundary Layer Scoop for the Enhancement of Coanda Effect Flow Deflection Over a Wing/Flap Surface.

27 MAR 1979

Authors: Charles A. Grotz; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A STOL aircraft having turbojet or torbofan engines mounted above and forward of the wing whereby the engine exhaust gases flow over and, by the Coanda effect, attach to the upper surfaces of the wing and a downwardly curved extendible flap to produce a downwardly turned exhaust flow having a large vertical component of thrust. Premature separation of the exhaust flow from the wing or flap due to reduced velocity ...

Parachute Inspection Arch.

27 MAR 1979

Authors: Francis P. Sinenci; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

An inspection aid for use in the visual inspection, repair and repacking of parachutes including a pair of large opposed spaced side frame members of light tubular material having a shape approaching that of a cardioid. The frame members are parallel to each other and joined by a series of spaced transverse cross members which serve to maintain the shape and rigidity of the arch. In use, the parachute canopy ...

Thinned Withdrawal Weighted Surface Acoustic Wave Interdigital Transducers.

27 MAR 1979

Authors: kenneth r. laker; thomas l. szabo; Andrew J. Slobodnik Jr; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This invention relates to surface acoustic wave withdrawal weighted interdigital transducers and in particular to an electrode thinning technique that achieves mass loading reductions in such devices. Surface acoustic wave (SAW) technology has become increasingly attractive for various signal processing applications, primarily because SAW devices can be fabricated to be compact, lightweight, and reliable using well established planar techniques. Many analog filter functions, not easily synthesized with classical techniques, can ...

Integrated Quantized Signal Smoothing Processor.

13 MAR 1979

Authors: Gordon S. Ley; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

An integrated quantized signal smoothing processor samples an analog signal, converts it to a digital number and averages n samples, the averages of n equal or nearly equal signals will be quantized with the quantization interval of an A/D converter. An improvement signal is added at the input of the A/D converter with the output quantization interval becoming q/n. For a given accuracy, the improvement permits a lower number of ...

Bubble Domain Structures and Method of Making.

13 MAR 1979

Authors: Irena Puchalska-Hibner ; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A magnetic bubble domain structure and method of making comprising a film of a nickel-iron alloy of 80 to 83.5% nickel content and substantially zero constant of magnetostriction formed by vapor deposition of the alloy onto a flat substrate at a substrate temperature in the range of room temperature to 200 degree C. at an angle of incidence of approximately 60 degree to a film thickness of 0.2 microm to ...

Readily Curable Fluorocarbon Ether Bibenzoxazole Polymers.

27 FEB 1979

Authors: Robert C. Evers; Tonson Abraham; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Thermooxidatively and hydrolytically stable perfluoroalkylene ether bibenzoxazole polymers containing hydrocarbon cure sites are synthesized by the polocondensation of a fluorocarbon bis(o-aminophenol) containing a hydrocarbon moiety and a perfluoroalkylene ether diimidate or dithioimidate ester. The polymers are readily curable to elastomers that are resistant to hydrolysis over a wide use-temperature range. Thus, the polymers are especially suitable for use in aerospace applications where extreme environments are encountered. In particular, the polymers ...

Impact Sound Stressing Holding Assembly.

20 FEB 1979

Authors: James F. Francis; W. Hearn; Ralph G. Dessauer; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A holding assembly for impact sound stressing semiconductor wafers and the like including a novel fixture for securing the wafer across a sound tube by clamping between Teflon rings. A cover membrane is also secured across the sound tube to create a closed space defined by the sound tube, cover membrane and semiconductor wafer. Tungsten spheres located in the closed space bounce between the wafer and the membrane when vibrations ...

Ramp Toe Stowage System.

20 FEB 1979

Authors: Donald E. Evans; Lewell M. Lively Jr; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

The invention relates to a structural system for capturing, supporting, and releasably securing a tail ramp toe of an aircraft, while the aircraft is either on the ground or in flight. The preferred embodiment of the ramp tow stowage system is adapted for use with a cargo aircraft having: a downwardly and outwardly opening tail ramp, with at least one ramp toe removably attached to it; and, an upwardly and ...

Gas Bearing Surface Coating.

20 FEB 1979

Authors: Vincent A. Orlando; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This invention relates to a method for increasing the life and reliability of beryllium gas bearings by applying a coating of chromium to one bearing surface and an anodized beryllium coating to its mating surface.

Fluoroalkyleneether Silicate Copolymers.

20 FEB 1979

Authors: Robert E. Cochoy; Alan A. Shaffer; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Fluoroalkyleneether silicate copolymers are synthesized by the polycondensation of a bis-dimethylcarbinol containing a fluoroalkyleneether segment and bis(dimethylamino) methylvinylsilane. The copolymers are useful in applications, e.g., as seals and sealants, involving use temperatures ranging from about -90 C to 600 deg. C. They are particularly useful when blended with a fluorocarbon elastomer, enhancing the strength and low temperature flexibility of the elastomer. (Author)

Multiband High Frequency Communication Antenna with Adjustable Slot Aperture.

20 FEB 1979

Authors: Carlyle J. Sletten; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent relates to a portable multiband H.F. antenna that has minimum ground area requirements and that is capable of transmitting electromagnetic wave radiation with horizontal polarization, azimuth plane omnidirectional patterns and a null in the vertical beam pattern is realized by means of an easily erectable tower type radiator. The tower structure has adjacent conductive leg members that define an elongated antenna slot aperture the total length of which ...

Associative Bubble Memory Apparatus.

20 FEB 1979

Authors: Rex A. Naden; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

An associative bubble memory apparatus utilizing a plurality of registers therein to provide a high total memory capacity and to provide data retrieval or correlation based upon content rather than the address of the data of interest.

Optical Scanning Digitizer.

16 FEB 1979

Authors: Brook S. Dew; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A system and device for scanning continuous line graphs and providing a digital output for storage and interpretation utilizing a hybrid electro-mechanical scanning array and a computer-processor to drive the scanner and convert and store the informational output from the scanner. (Author)

Digital Phase-Frequency Detector.

16 FEB 1979

Authors: T. H. Kimsey; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A digital phase-frequency detector which provides rapid frequency acquisition and phase control when used in phase-locked loop applications. In a locked condition the output of a pair of flip-flop circuits are high causing an EXOR gate to produce a detector output, when unlocked a phase difference will increase until the higher frequency exhibits two positive transitions before one positive transition of the lower frequency can propagate through the circuit, this ...

Retractable Nose Landing Gear.

08 FEB 1979

Authors: R. C. Churchill; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A retractable nose landing gear for a high performance aircraft including a structure which is pivoted into the fuselage of the aircraft and which positions the wheel mechanically relative to the landing gear structures to provide stowage of the wheel in a horizontal position directly behind the retracted landing gear structure thereby providing a minimum of storage space in the aircraft while maximizing space for an engine air duct above ...

Titanium and Titanium Alloys Ion Plated with Noble Metals and Their Alloys.

30 JAN 1979

Authors: Shiro Fujishiro; Daniel Eylon; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Components fabricated from titanium and titanium alloys are subjected to an ion plating with noble metals or their alloys. The structures so treated are highly resistant to oxidation at elevated temperatures and possess improved mechanical properties. (Author)

Method for State of Charge of Primary Battery.

30 JAN 1979

Authors: David H. Fritts; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

In a porous electrode primary battery a sensing grid is positioned in a cell on or near the surface of the porous cathode facing the separator and anode. The voltage measured between this sensing grid and the conventional cathode current collector grid is a function of the current distribution within the electrode which is continuously changing as the battery discharges, thus the measured voltage is indicative of the state of ...

Laser Gas Temperature Control and Spacial Equalizer.

26 JAN 1979

Authors: Robert D. Marcy; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A system for substantially eliminating undesirable temperature transients and spacial gradients in the laser gas flow through a laser cavity having a large system heat exchanger positioned upstream of the cavity which provides an exit gas temperature Ti approximately 5 degrees above the desired cavity inlet temperature wherein the large heat exchanger has a time dependent tolerance of + or - 5 degrees. A trimmer heat exchanger is positioned between ...

Method of Joining a Fine Wire Filament to a Connector.

23 JAN 1979

Authors: Seiji Kami; Warren A. Stefferson; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Fine diameter wires especially suited for high temperature filaments are physically and electrically held in simple cylindrical connectors by lining the inside of the connector with a closely wound wire coil, inserting the fine wire into the center of the coil, and lightly crimping the outer surface of the connector until the filament wire is electrically joined to the connector and firmly held therein without the filament being weakened or ...

Deformable Heat Transfer Fin.

23 JAN 1979

Authors: James A. Rew; Albert B. Simon; Thomas M. Fahey; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A mechanically deformable heat transfer fin is described for installation in a hollow cavity of a large complex elongated extrusion to improve heat transfer characteristics without brazing welding or glueing. Since the required design cannot be obtained with the transfer fins as an integral part of the extrusion using presently known techniques, a separate fin insert of slightly smaller dimensions than the hollow opening of the large extrusion is installed ...

Over-Pressure Protection Device.

23 JAN 1979

Authors: David L. Stoner; Charles F. Shield III; Ronald G. Julian; Ewald Koegel; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent discloses an over-pressure protection device utilized for limiting the fluid pressure applied to a vein which has been removed from the body and which is being tested prior to transplantation within the body. The over-pressure protection device has a port for accepting a fluid under pressure, a tapered fitting for connection of the device to the vein to be tested and a resilient membrane which regulates the pressure ...

Liquid Nitrogen Level Controller.

23 JAN 1979

Authors: Daniel Sears; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

The liquid nitrogen level in a flask is controlled by the degree of immersion of two sensing coils of copper wire in the liquid nitrogen activating a solid state switching circuit which controls a liquid nitrogen inlet flow valve. Manual override and sensor fault indication is provided. (Author)

Charge Sensing Electrode for a Primary Battery.

23 JAN 1979

Authors: David H. Fritts; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Pre-TR High Power/Intermediate Power Stage Apparatus.

16 JAN 1979

Authors: James F. McLaughlin; Theodore M. Nelson; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent describes a pre-TR high power/intermediate power stage apparatus for receiver protectors utilizing a single quartz vial filled with a halogen gas and having a predetermined configuration to provide the dual function of a high power pre-TR and the intermediate power stage. (Author)

RF Loop Intruder Detection System.

16 JAN 1979

Authors: Walter Rotman; J. Leon Poirier; Nicholas V. Karas; Peter R. Franchi; Ronald L. Fante; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

An RF intruder system utilizes two concentric loops of wire spaced apart for a predetermined magnitude, either of which can transmit and/or receive electromagnetic energy. This area within the loops are to be protected against intrusion. Without intrusion, the received signal is steady. Upon intrusion, there are signal changes which are instantly noted by signal detection and processing. (Author)

Stress Buffer/Amortisseur for a Permanent Magnet Rotor.

10 JAN 1979

Authors: William U. Borger; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

The invention disclosed herein relates to permanent magnet (PM) electrical machinery, and in particular that class of machines in which the rotor is fabricated with multiple rare earth metal permanent magnets, generally having limited tensile and compressive strength, enclosed within a laminated rotor containment structure. The essential feature of the improvement taught is an intermediate sleeve, in the form of a layer of nonmagnetic electrically conductive material between the stress ...

Grease Compositions.

02 JAN 1979

Authors: John B. Christian; Christ Tamborski; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent describes an antirust, anticorrosion grease composition comprising a major proportion of a perfluorinated polyalkylether base fluid, a minor proportion of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a fluorine-containing benzoxazole. (Author)

Radar Intrusion Detection System.

02 JAN 1979

Authors: Philipp Blacksmith; J. Leon Poirier; Frederick S. Holt; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A radar intrusion detection system for isolated resources uses only one bistatic radar in combination with multiple passive reflectors to define the zone to be protected. Any intruder crossing a boundary of the zone within which is located the isolated resources interrupts the radar beam and thus may sound an alarm. (Author)

Degasser and Liquid Seal Reservoir.

26 DEC 1978

Authors: John S. Debrotnic; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent discloses a unitized apparatus with no moving parts capable of degassing the liquid flowing through it, forming a liquid seal and reservoir between the pressurization system and flowing liquid, and operating in an aircraft type varying 'G' environment. Two cylindrical tanks are vertically disposed one within the other with a transfer tube forming the means of communication between their interiors. Liquid within the inner tank covers one end ...

Method and Apparatus for Use in the Extrusion of Billets.

26 DEC 1978

Authors: Vincent De Pierre; Ferdinand J. Gurney; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A method and apparatus for use in the extrusion of billets having a powder filled container with the nose cap having a shaped projection extending into the container and the tail cap having a concave portion substantially corresponding to the shape of the nose cap. A filler tube for the container is provided in the tail cap. (Author)

Low Infrared Emissivity Paints Comprising an Oxime Cured Silicone Binder.

26 DEC 1978

Authors: Henry Y. B. Mar; Paul B. Zimmer; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A low infrared emissivity paint composition for use in coating applications requiring nuclear flash protection. The paint comprises a mixture of a pigment material such as Ta2O5, BaTiO3, CdS, Sb2S3, CoTiO3 or CdSe and an oxime cured silicone binder material. (Author)

4,4 FEET Bis(3-Ethynylphenoxy)Diphenylsulfone.

26 DEC 1978

Authors: Fred E. Arnold; Gerard A. Loughran ; Anthony Wereta Jr; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

The new composition 4,4'-bis(3-ethynylphenoxy)diphenylsulfone is prepared by the nucleophilic displacement reaction of m-hydroxy-phenyl acetylene with various disubstituted diphenylsulfones. The composition is useful as a composite resin and also as a reactive plasticizer for polysulfone thermoplastic resins. A reactive plasticizer is a material that remains fluid and acts as a plasticizer during early stages of fabrication and then polymerizes to a rigid resin. (Author)

P-Terphenylene-Dicarboxylic Acids and Their Synthesis.

26 DEC 1978

Authors: Fred E. Arnold; James F. Wolfe; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

P-Terphenylene-dicarboxylic acids in which aromatic groups are attached to the middle phenyl group of the terphenylene moiety. The compounds are useful as monomers in the preparation of rod-like, para-ordered aromatic heterocyclic polymers. (Author)

Fabry-Perot Diplexer.

26 DEC 1978

Authors: Howard Schlossberg; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent discloses an improved Fabry-Perot diplexer for receiving a first and second signal of differing frequency from different directions and outputting these signals in parallel relationship with respect to one another and in the same direction. The diplexer is made up of four highly reflective elements having substantially no transmission and defining an optical path therebetween. Interposed within the optical path are a pair of beamsplitters. The total length ...

Single Dispersive Delay Line Compressive Receiver.

26 DEC 1978

Authors: Ervin K. Holland-Moritz; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

This patent describes a wideband compressive receiver using only one surface acoustic wave (SAW) device in a time-multiplexed fashion. A short pulse into the SAW device generates a 'downchirp' local oscillator sweep signal which, after appropriate band limiting, is mixed with the incoming signal of unknown frequency. The lower sideband is filtered out and applied to the same SAW device as an 'upchirp'. Timing of the resulting compressed pulse emanating ...

Flared Sonic End Nozzle Velocity Coupling Test Burner.

19 DEC 1978

Authors: Paul L. Micheli; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Describes a flared sonic end nozzle velocity coupling test burner having a body, the walls of which define a chamber. The chamber is closed at one end thereof and has a flared sonic nozzle at the other end. Tests are performed for determining velocity coupling response with a propellant driver located adjacent to the closed end of the chamber and the propellant sample being situated during a first test at ...

Method and System of Controlling a Jet Engine for Avoiding Engine Surge.

19 DEC 1978

Authors: Gary J. Harloff; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A jet engine is controlled by placing time variant total pressure probes at the entry plane and the discharge plane of a jet engine fan. The pressure values at the probes are converted into electrical signals, filtered and then fed to meters where the root-mean-square (RMS) values of the electrical signals are determined. The RMS values are fed to a computer which computes the ratio of the two RMS values ...

Method for Reducing the Electrical Charging of Orbiting Spacecraft.

19 DEC 1978

Authors: A. G. Rubin; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

A method for suppressing the electrical charges induced on the surface of earth orbiting satellite by applying to the exterior portion of the satellite a layer of alumina, quartz or polytetra fluoroethylene as a charge supressing material. (Author)

Double Plug Shuttle Valve.

05 DEC 1978

Authors: William A. Hart; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Describes a double plug shuttle valve having a pair of valve plugs slideably mounted within a hollow body. A tubular actuator operatively connected to the valve plugs permits fluid communication between a central chamber and two end chambers to allow either balanced or unbalanced operation by proper selection of the dimensions of the elements of the valve.

Catadioptric Objective.

05 DEC 1978

Authors: Wai-Min Liu; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Describes a catadioptric objective lens system that has a field of view of 10 deg, and that will provide: a large relative aperture of 1.28; optimum performance in the S-20 spectral range; and, maximum light throughout the region of apertures for exactly the 10 deg field of view.

Engine Chip Detector.

28 NOV 1978

Authors: Robert D. Sproul; Guillermo E. Todd; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Describes a transistorized engine chip detection system including a milliammeter to give a visual indication of chip buildup and a full light to operate at a critical preset level. Utilizing a voltage divider network, a decrease in resistance in the chip detector will cause an increase in current flow, and subsequent lighting of a warning light. A short circuit or large chip would turn light on and give full scale ...

Optimized Mode-Locked, Frequency Doubled Laser.

28 NOV 1978

Authors: James D. Barry; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

In a solid state, folded cavity, laser having a fundamental frequency and a second harmonic frequency, the efficiency of the laser is improved by placing a quarter wave plate, at the lower frequency, in the leg of the cavity containing the lasing element and positioning the quarter wave plate by angular rotation to compensate for any polarization discrimination to the laser rod gain. (Author)

Surface Acoustic Wave Rate Sensor and Position Indicator.

21 NOV 1978

Authors: James C. Sethares; harold m. frost; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Extremely sensitive velocity and position measurements are achieved with a surface acoustic wave (SAW) resonator device. A surface acoustic standing wave field is established on a movable SAW propagation surface by means of induced SAW pulses traveling on the propagation surface and their reflection from a SAW reflecting mechanism. Movement of the propagation surface causes periodic variations in the standing wave field amplitude. The frequency of the standing wave field ...

Converging Wave Unstable Resonator.

21 NOV 1978

Authors: Richard A. Chodzko; Stephen B. Mason; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

An unstable resonator is disclosed that couples power out of an annular gain region in a single transverse mode through the use of spherical mirrors. A four-element cavity comprising a confocal unstable resonator with a double-sided 45 output coupling mirror in conjunction with a flat feedback mirror is used. A flat, totally reflecting feedback mirror is placed on the normally plane wave output side of the confocal cavity, forming an ...

Porous Electrode Primary Battery Having State of Charge Sensing Electrode.

21 NOV 1978

Authors: David H. Fritts; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Diffraction Grating Coupled Optically Pumped Laser.

21 NOV 1978

Authors: Howard R. Schlossberg; Harold R. Fetterman; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

An optically pumped submillimeter laser system having a laser cavity is described, which contains therein a diffraction grating. The diffraction grating is used simultaneously as an efficient first order diffractor for coupling in the short wavelength pump radiation and as a zero order or highly reflecting plane mirror for the production of an output of (long wavelength) submillimeter wavelength. (Author)

Countermeasure for Loro Radar.

21 NOV 1978

Authors: Fred M. Simonaire; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Describes a countermeasure for LORO (lobe-on-receive-only) tracking radars comprising a transmitter and a receiver which controls the transmitter. The transmitter radiates pulses on the radar's frequency at a repetition rate that repeatedly sweeps over a range selected to include the unknown lobing frequency of the radar, the sweeps being alternately slow and fast. The receiver circuit receives the tracking radar signal and operates upon a fall in its intensity to ...

Interferogram Synthesization Method and Apparatus.

20 NOV 1978

Authors: Joseph M. Geary; DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Real time presentation and evaluation of any selected interferogram is realized by electronically simulating optical aberration patterns and displaying them on a cathode ray tube (CRT). The optical aberration patterns include PISTON; X and Y TILT; DEFOCUS; SPHERICAL; COMA; and ASTIGMATISM. The aberration patterns are generated electronically in response to the CRT beam sweep drive signal and are displayed as a function of CRT beam intensity. Any combination of aberration ...