Journal of the Horological Institute of Japan
Online ISSN : 2432-1915
Print ISSN : 0029-0416
ISSN-L : 0029-0416
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Volume 113
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1985 Volume 113 Pages Cover1-
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_Cover1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    1985 Volume 113 Pages Cover2-
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_Cover2
    JOURNAL FREE ACCESS
    Download PDF (83K)
  • An Accuracy of the Airy's Formula
    Yasuo JIMBO, YIN YUE Fan
    Article type: Article
    1985 Volume 113 Pages 1-7
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_1
    JOURNAL FREE ACCESS
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    An accuracy of the Airy's formula is examined. The Airy's formula gives a period of a pendulum excited by an impulsive force. Results obtained are as follows: When an impulsive force works upon a pendulum before it reaches the neutral point, the Airy's formula gives a little less value of the period than the exact one, and when the impulsive force works after the pendulum has passed the neutral point, it gives a little excessive value of the period. The deviation becomes greater when the damping of the pendulum becomes greater and when the working point of the impulsive force becomes distant from the neutral point of the pendulum.
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  • Vision System for Watch Assembly Line
    Tetsumi KAWAMOTO
    Article type: Article
    1985 Volume 113 Pages 8-14
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_8
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    A watch assembly line using vision system to assemble face, hands, case, and back has been accomplished. The features of this system are as fol1ows: (1) Exchange of assembly parts is very easy by using display of menu, so that this system can be used for assembly of various parts. (2) Not so high speed is required in the processing time of this system because of the parallel running of robot and vision system, so that this system is not expensive.
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  • Terminal Watch "RC-1000"
    Yukio YOKOZAWA, Hiroaki FUJIMORI
    Article type: Article
    1985 Volume 113 Pages 15-28
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_15
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    A Wrist watch "WRIST TERMINAL RC-1000" has been developed and put on the market. This one not only can receive data directly from information processing instruments (personal computers) but also memorise and readout the data at any time. As the RS-232C interface and RAM of 2K bytes are installed in the wrist watch, such functions as memory, schedule alarm, and world time are also fulfilled.
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  • Hue and Spectral Reflectance of TiN Films Prepared by Dry Process
    Yoshitaka ENOMOTO
    Article type: Article
    1985 Volume 113 Pages 29-36
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_29
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    Titanium Nitride and Titanium carbonitride films deposited by the hollow cathode discharge (HCD) process using N_2, C_2H_2 and H_2 gases as reactants are examined. The color characteristics and the spectral reflectance of TiN films are investigated by using the Hunter Lab system and multiple regression analysis. It is found that a hue close to that of electro-plated gold can be obtained with an appropriate composition, although lightness of the film surface decreases as the reactant gas throughput increases.
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  • Analogue Quartz Watch with Built-in Alarm and Chronograph System
    Yasuo KAMIYAMA, Yukio ITO, Takeo MUTO
    Article type: Article
    1985 Volume 113 Pages 37-52
    Published: June 20, 1985
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.113.0_37
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    We have developed an analogue quartz watch provided with built-in alarm, chronograph, and timer as well as conventional functions of analogue quartz watches. Three independent motors are built in this watch. Hour and minute hands driven by the first motor indicate normal and alarm-set times. Second hand at the center of the watch, and chronograph hour and minute hands are driven by the second motor, and they indicate normal second time, and chronograph second, minute and hour times, respectively. Small second hand driven by the third motor indicates chronograph 2/100 second and timer up to 49 minutes. In this paper, descriptions are made mainly on the structure of the movement and on the system constructed on the basis of fine mechanism combined with micro-electronics.
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