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  • INSTRUMENTATION AND PHOTOGRAPHY  (91)
  • MACHINE ELEMENTS AND PROCESSES  (49)
  • 1970-1974  (140)
  • 1965-1969
  • 1950-1954
  • 1945-1949
  • 1935-1939
  • 1973  (140)
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Keywords
Years
  • 1970-1974  (140)
  • 1965-1969
  • 1950-1954
  • 1945-1949
  • 1935-1939
Year
  • 1
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    Noncontacting devices to indicate deflection and vibration of turbopump internal rotating parts (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The research is reported which was conducted to develop devices for measuring vibrations and deflections of parts, such as impellers, shafts, turbine wheels, and inducers in operating turbopumps. Three devices were developed to the breadboard stage: ultrasonic Doppler transducer, flash X-rays, and light-pipe reflectance. It was found that the X-ray technique is applicable to the shaft assembly and the turbine seal of the J-2 pump, and the light-pipe-reflectance device appears to be ideal for cryogenic pump sections.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-124208
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    PAET, an entry probe experiment in the earth's atmosphere. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Description of the instrumentation of a probe designed for atmospheric studies on other planets and designated PAET. The probe was launched on June 20, 1971, near Bermuda in a trial experiment for measurements of the structure and composition of the terrestrial atmosphere. The instrumentation included accelerometers, pressure and temperature sensors, a mass spectrometer, and a radiometer. The measurements, carried out during the descent of the probe from an altitude of 90 km into the sea, were a success.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Icarus; 18; Apr. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    The color bar phase meter: A simple and economical method for calibrating crystal oscillators (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Comparison of crystal oscillators to the rubidium stabilized color burst is made easy and inexpensive by use of the color bar phase meter. Required equipment consists of an unmodified color TV receiver, a color bar synthesizer and a stop watch (a wrist watch or clock with sweep second hand may be used with reduced precision). Measurement precision of 1 x 10 to the minus 10th power can be realized in measurement times of less than two minutes. If the color bar synthesizer were commercially available, user cost should be less than $200.00, exclusive of the TV receiver. Parts cost for the color bar synthesizer which translates the crystal oscillator frequency to 3.579MHz and modulates the received RF signal before it is fed to the receiver antenna terminals is about $25.00. A more sophisticated automated version, with precision of 1 x 10 to the minus 11th power would cost about twice as much.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. Goddard Space Flight Center Proc. of the 5th Ann. NASA and DOD Precise Time and Time Interval Planning Meeting; p 503-504
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Spectrophotometric results from the Copernicus satellite. I - Instrumentation and performance. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The Princeton telescope-spectrometer on the OAO spacecraft Copernicus scans stellar spectra with a resolution of about 0.05 A between 950 and 1450 A, and twice this in first order between 1650 and 3000 A. The pointing during several minutes is steady within .02 sec, and the measured photometric precision in the shorter wavelength range is limited only by the statistics of photon counts, with 14-sec counts of about 1000 on an unreddened B1 star, m(v) = 5.0, at 1100 A. In the 1650-3000 A wavelength range, phototube noise resulting from cosmic rays makes observations difficult on stars fainter than m(v) = 3.0.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Astrophysical Journal; 181; May 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Design, fabrication and testing of a 5-Hz acoustic exciter system (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A 5-Hz acoustic excitation system was designed, fabricated and checked out for use in the modulation of a stagnant gas volume contained in an absorption cell. A detailed system description of the test equipment, both mechanical and electronic, and an operating procedure are included. Conclusions are also presented.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-124269 , T1046F
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Some observations of the relationship between film thickness and load in high Hertz pressure sliding elastohydrodynamic contacts. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: ASME PAPER 73-LUB-D
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Thermal design and testing of the Apollo 17 lunar traverse gravimeter. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 73-771 , Thermophysics Conference; Jul 16, 1973 - Jul 18, 1973; Palm Springs, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Performance of high speed ball bearings with lead and lead alloy plated retainers in liquid hydrogen at 1.2 million DN (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Ball bearings with lead- and lead-alloy-coated retainers were operated in liquid hydrogen at 30,000 rpm under a thrust load of 400 lb. Bearing lives were compared using different: (1) lead- and lead-alloy coatings, (2) coating thicknesses, (3) substrate materials, (4) retainer locating surfaces, and (5) plating techniques. Longer bearing run times were achieved using retainers with a lead-tin-copper alloy coating electroplated onto a leaded-bronze material and an aluminum-bronze alloy. Thirty percent of the bearings tested achieved the desired objective of 10 hours. All of the lead-alloy coated retainers exceeded this objective. A coating thickness of at least 0.0014 in. was used for all bearings exceeding the 10-hour goal.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TM-X-68268 , E-7573 , Joint Lubrication Conf; Oct 16, 1973 - Oct 18, 1973; Atlanta GA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Texturing in metals as a result of sliding (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Sliding friction experiments were conducted with copper, nickel, iron, and cobalt sliding on themselves in air and argon. The resulting wear surfaces were examined with X-ray analysis to determine if surface texturing had occurred as a result of sliding. Results of the investigation indicate that, for the face-centered-cubic metals copper and nickel, a (111) texture develops with the (111) planes tilted 10 deg in the direction of sliding. The body-centered-cubic metal iron exhibited a (110) texture with the (100) direction oriented in the direction of sliding. It also exhibited a 10 deg tilt in the direction of sliding. The environment influenced the results in that the degree of texture observed in argon was less than that seen in air for iron. No texturing was observed for the close-packed-hexagonal metal cobalt. Recrystallization was observed with copper as a result of sliding.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TN-D-7136 , E-7160
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    The Hat Creek millimeter-wave interferometer. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A fixed-baseline millimeter-wave interferometer, operating initially at 13.5 mm, has been put into operation at the Hat Creek Observatory as the first step in the development of a two-element aperture synthesis telescope. The first system consists of a 3-m antenna and a 6-m antenna spaced 265 m apart. Large receiver bandwidths may be used at high frequencies, and this system employs an intermediate frequency bandwidth of about 400 MHz. The instrument has been used to derive accurate absolute positions of interstellar water vapor sources, to study Mercury, Venus, and Mars, and to make crude maps of a few complex continuum sources. The synthesis telescope, the next stage, has two 6-m antennas which can be located at various stations on a T-shaped track. The east-west leg is 300 m and the north-south leg is 200 m, permitting full synthesis for sources on the equator and at declinations as low as -30 deg as well as at high declinations.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE; vol. 61
    Format: text
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