High performance bypass control for mixed-compression inlets
Shock and restart control systems with bypass doors and pressure transducers for mixed compression inlets
Cole, G. L.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Modification of ultrasonic beamwidths by aperture control
Elliptical mask for transducer aperture to shape far field ultrasonic beam pattern
Boyd, F.↗
Welding skate with computerized torch angle and welding speed control.
Welding skate with computerized torch angle and speed control maintained without mechanical, electromechanical or photoelectric transducers
Wall, W. A.↗
Amplification of acoustic waves at microwave frequencies.
Acoustic wave amplifiers design and characteristics at microwave frequencies, discussing thin film transducers gain and piezoelectric semiconductors amplification factors
Quate, C. F.↗
High performance bypass control for mixed- compression inlets.
Bypass control for mixed compression inlets, discussing normal shock and restart control systems utilizing bypass doors and pressure transducers
Cole, G. L.↗
The challenge of nondestructive testing in outer space.
Efficient nondestructive evaluation of structures during in-space fabrication, discussing problems due to environment and lithium sulphate crystal transducer
Beal, J. B.↗
Determination of detonation wave velocities.
Detonation wave velocity measurement using piezoelectric coaxial transducer pins and solid state pulse amplifiers
Bowen, J. R.↗
New component developments for space technology.
Electronic component development for space technology, discussing memory transistor, transducers, molecular electronics, power components and integration
Dunlap, W. C.↗
Bootstrap unloader
Circuit can sample a number of transducers in sequence without drawing from them. This bootstrap unloader uses a differential amplifier with one input connected to a circuit which is the equivalent of the circuit to be unloaded, and the other input delivering the proper unloading currents.
Pfiffner, H. J.↗
Mossbauer vibration calibration systems evaluated
Mossbauer effect vibration calibrator measures the velocity of high frequency, low amplitude vibration at various velocity and frequency ranges. It contains a highly precise calibrations standard unit and a vibration measuring system and may be applied to ultrafine testing and calibrating prezoelectric shakers, and vibration transducers.
Hobbs, J. V.↗
Nondestructive testing of welds on thin-walled tubing
Special ultrasonic search unit, or transducer assembly, reliably inspects the quality of melt-through welds of fusion welded tubing couplers for hydraulic lines. This instrumentation can also be used to detect faulty braze bonds in thin-walled, small diameter joints and wall thickness of thin-walled metal tubing.
Hagemaier, D. J.↗
Nondestructive determination of cohesive strength of adhesive-bonded composites
Systematic plan determines vibration responses and modes of honeycomb composites, correlates vibrational responses of composite specimens varying in strength of cohesive bond, determines effects of thickness variation of the face sheet over the frequency range, optimizes the characteristics of the excitation transducer, and measures bond strength.
Thompson, D. O.↗
Gas Metal Arc /GMA/ weld torch proximity control
Adjustable transducer probe, which is attached to a welding torch and maintains a preset touch-to-work distance, accurately follows irregular surfaces, is less sensitive to heat and static interference, and has more positive response because of electro-mechanical control.
Hawkes, E. D.↗
Miniature backward-diode pressure sensor features stability and low power consumption
Backward-diode pressure transducer retains the advantages of a tunneling mechanism, requires no shunting resistor, operates at a low voltage level, and consumes little power.
Garfein, A.↗
Cb-1zr Pumped Sodium Loop
Cb-1Zr pumped sodium loop tests to evaluate loop components, EM pump, pressure transducers, and instrumentation techniques
Hoffman, E. E.↗
Analysis, design, and prototype development of squeeze-film bearings for AB-5 gyro Final report phase 2, design, fabrication and evaluation of prototypes
Squeeze-film bearing transducers with piezoceramic cylinders for AB-5 gyro - design, fabrication, and testing of cylindrical journal and annular bearing prototypes
Orcutt, F. K.↗
Research in life sciences instrumentation pertinent to studies in space biology Quarterly report, 1 Oct. - 31 Dec. 1968
Modifications in multichannel telemetry and transducers, for space biology instrumentation
Source record↗