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  • 1
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    Brushless dc motor has high efficiency, long life (1966)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Brushless dc motor operates as a commutator in a vacuum environment with high efficiency and long life. Because of its excellent response time, it can be used in the servomechanism field.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-181
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Brushless dc motor uses electron beam switching tube as commutator (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Electron beam switching tube eliminates physical contact between rotor and stator in brushless dc motor. The tube and associated circuitry control the output of a dc source to sequentially energize the motor stator windings.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-345
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Capacitive connectors for digital-data lines (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Proposed connector consisting of twin metal films separated by thin layers of insulating material transmits digital pulses capacitively. There is no direct contact between metal films; therefore, there is no ohmic contact drop and no wear when connections are changed. Since metal films are sealed in insulating material, there is no corrosion from exposure to atmosphere.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-12238 , NASA Tech Briefs (ISSN 0145-319X); 2; 2; P. 3
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    An electric motor with magnetic bearings: A concept (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Because same magnetic flux is used to control rotor as to drive it, size, weight, and power required are minimized. Constant total current keeps motor torque invarient, and absence of mechanical bearings eliminates wear and reduces frictional power loss.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: XGS-07805
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Rotary Transformer Seals Power In (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Rotary transformer originally developed for spacecraft transfers electrical power from stationary primary winding to rotating secondary without sliding contacts and very little leakage of electromagnetic radiation. Transformer has two stationary primary windings connected in parallel. Secondary, mounted on a shaft that extends out of housing, rotates between two windings of primary. Shaft of secondary is composed of electrically conducting inner and outer parts separated by an insulator. Electrical contact is made from secondary winding, through shaft, to external leads.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-12595 , NASA Tech Briefs (ISSN 0145-319X); 6; 1; P. 9
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Helical recorder (1969)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Tape recorder, using metallic tape, has a minimum of moving parts and no belts. It permits long-term bulk storage in extreme environments, and has less weight and bulk than present recording equipment.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: GSC-10614
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 7
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    Field-Sequential Color Converter (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Electronic conversion circuit enables display of signals from field-sequential color-television camera on color video camera. Designed for incorporation into color-television monitor on Space Shuttle, circuit weighs less, takes up less space, and consumes less power than previous conversion equipment. Incorporates state-of-art memory devices, also used in terrestrial stationary or portable closed-circuit television systems.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: MSC-21346 , NASA Tech Briefs (ISSN 0145-319X); 13; 7; P. 24
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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