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  • 1
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    Sterilization studies (1966)
    In:  CASI
    Details
    Publication Date: 2006-10-26
    Description: Polymer sterilization research
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Studies on the frictional behavior of magnetic recording tapes (1972)
    In:  CASI
    Details
    Publication Date: 2006-02-22
    Description: Methods were developed for measuring frictional forces acting on a magnetic tape in motion or at rest, as well as the extent of stick slip. The effects of factors such as temperature, humidity, kind of gaseous atmosphere, and tape speed on the frictional interaction between various tapes and heads were investigated. Results were instrumental in the selection of a tape for the Mariner Mars 1971 spacecraft. Studies are reported on the stick slip behavior of tapes and the performance of a metallic tape, compared with the usual plastic tapes.
    Keywords: COMMUNICATIONS
    Type: JPL Quarterly Tech. Rev., Vol. 2, No. 1.; p 100-106
    Format: text
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  • 3
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    Effects of thermal sterilization on tape recorder components (1966)
    In:  Other Sources
    Details
    Publication Date: 2011-08-11
    Description: Thermal sterilization effects on components used in construction of Mariner IV endless loop magnetic tape transport
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Instrument for measuring thin-film belt lengths (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Instrument consists of base, vernier height gauge, sliding block, and balance-beam assembly with tension weight. Pulley bracket is provided with three pulley mounting holes, 4 inches apart, to accommodate widely different belt lengths. Instrument is accurate to within 0.001 inch and is suitable for commercial production.
    Keywords: MECHANICS
    Type: NPO-13149
    Format: application/pdf
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  • 5
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    Magnetic tape recorder for long operating life in space. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Magnetic tape recorders have long been used on satellites and spacecraft for onboard storage of large quantities of data. As satellites enter into commercial service, long operating life at high reliability becomes important. Also, the presently planned long-duration space flights to the outer planets require long-life tape recorders. Past satellite tape recorders have achieved a less than satisfactory performance record and the operating life of other spacecraft tape recorders has been relatively short and unpredictable. Most failures have resulted from malfunctions of the mechanical tape transport. Recent advances in electric motors and static memories have allowed the development of a new tape recorder which uses a very simple tape transport with few possible failure modes. It consists only of two brushless dc motors, two tape guides, and the recording heads. Relatively low tape tension, wide torque capability, and precise speed control facilitate design for mechanical reliability to match that of tape-recorder electronics.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: IEEE PAPER 12,4
    Format: text
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  • 6
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    A study of the frictional and stick-slip behavior of magnetic recording tapes (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Methods were developed to determine the coefficient of friction and the extent of stick-slip of magnetic recording tapes. After a preliminary phase during which experimental procedures were established and screening of candidate tapes was carried out, the frictional and stick-slip behavior of four selected tapes, using four different kinds of magnetic heads, was studied at various temperatures, under dry and humid conditions, and in various gaseous atmospheres, such as argon, helium, nitrogen and air. The effects of tape speed and outgassing on the drag properties of the tapes were also studied. A rank was assigned to each tape and magnetic head as a result of these tests. This study helped in the selection of a magnetic tape in a flight project, and will be useful in the consideration of tapes and magnetic heads for future spacecraft applications.
    Keywords: COMMUNICATIONS
    Type: NASA-CR-125930 , JPL-TR-32-1548
    Format: application/pdf
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  • 7
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    Magnetic tape transport for high reliability in space (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Studies of tape recorder failure modes in spacecraft tape-recorder applications reveal that failures within the mechanical transport package far outnumber those of the associated electronics. It would, therefore, be desirable to simplify the transport mechanism and to separate the moving parts with a continuously fresh supply of a single inert lubricant medium. The suggestion is made to replace the ball bearings with hydrostatically pressurized fluid film bearings.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Management and design of long-life systems; Symposium; Apr 24, 1973 - Apr 26, 1973; Denver, CO
    Format: text
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