Journal of the Horological Institute of Japan
Online ISSN : 2432-1915
Print ISSN : 0029-0416
ISSN-L : 0029-0416
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Volume 135
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1990 Volume 135 Pages Cover1-
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_Cover1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    1990 Volume 135 Pages Cover2-
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_Cover2
    JOURNAL FREE ACCESS
    Download PDF (23K)
  • A Study of Sound Using Equal-Level Contour Display System
    Mitsuyuki NAKAYAMA
    Article type: Article
    1990 Volume 135 Pages 1-10
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_1
    JOURNAL FREE ACCESS
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    The equal-level contour of acoustic signal can characterize its individuality better than the three dimensional graph. This method has wide application and lower cost than the sound spectrograph. Time dependence of frequency spectrum about noise, sound of falls, and so on can be clarified by the investigation of the equal-level contour.
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  • Vibration Characteristics of Printer Head Mechanism
    Masayuki KUSUDA, Yasup YOSHIMURA
    Article type: Article
    1990 Volume 135 Pages 11-22
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_11
    JOURNAL FREE ACCESS
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    With rapid development of computer facilities, the peripheral equipments, printer, disc drive, display and so on are unavoidable to be used under severe circumstances such as temperature changes, electrical noises, and mechanical shocks. In particular cases where airplanes and automobiles are equipped with these equipments, influence of mechanical vibration and noise on the performances are inevitable. One of typical output equipments supposed to be used in severe environments is a printer. The vibrations are thought to consist mainly of external vibrations and internal ones caused by driving the motor and gears. By these vibrations, disordered figures or letters and shaded color are apt to be printed out in their circumstances. This paper aims to obtain a clue for optimum design of its anti-vibration structure by analyzing the vibration characteristics of printer head mechanism, with modal analyses, finite element method (FEM), and motion excitation tests. Basesd on the results obtained, some measures are proposed to keep high quality of printing.
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  • G Type Quartz Crystal Resonator with Supporting portions in Length Direction
    Hirofumi KAWASHIMA, Masaru MATSUYAMA
    Article type: Article
    1990 Volume 135 Pages 23-36
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_23
    JOURNAL FREE ACCESS
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    This paper describes frequency temperature behavior and electrical characteristics of a new shape G type quartz crystal resonator, formed by an etching method. A well known GT cut quartz crystal resonator is a G type quartz crystal resonator. However, as the GT cut resonator has the largest frequency constant, the resonator's size necessarily becomes large when resonant frequency becomes lower than 1 MHz. In order to realize miniaturization, a study has, therefore, been performed with a view to clarifying theoretically and experimentally the existence of a new cut angle whereat frequency constant gets smaller and a zero temperature coefficient is given for a new shape G type resonator. The present newly cut G type quartz crystal resonator is found to be a further miniaturized resonator of about 1 MHz with a zero temperature coefficient, small series resistance R_1, and a high quality factor.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    Article type: Article
    1990 Volume 135 Pages 37-77
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_37
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1990 Volume 135 Pages 78-79
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_78
    JOURNAL FREE ACCESS
    Download PDF (347K)
  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1990 Volume 135 Pages 80-81
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_80
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Article type: Appendix
    1990 Volume 135 Pages 83-
    Published: December 15, 1990
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.135.0_83_1
    JOURNAL FREE ACCESS
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