Journal of the Horological Institute of Japan

[title in Japanese]

Article type: Cover
1984 Volume 108 Pages Cover1-
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_Cover1

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[title in Japanese]

Article type: Cover
1984 Volume 108 Pages Cover2-
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_Cover2

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Wristwatch Equipped with Voice Recording System

Hiroshi YABE, Hajime MIYAZAKI, Hiroaki FUJIMORI

Article type: Article
1984 Volume 108 Pages 1-15
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_1

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We developed a wristwatch having an all-solid-state digital recording and regenerating function obtained by the latest semiconductor technique, and the products are now on the market. The all-solid-state recording and regenerating function is accomplished by using ADM process. Further, we developed a microphone-speaker which is capable to input and output the voice. 16K bit static RAM is utilized as a recording memory medium and the circuit block is constructed with two printed circuit boards so that LSI and other elements are packed in small and assembled easily. Thus, this construction prevents the assembling yield from lowering.

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Flexible Watch Coil Assembly System CAS-20

Satoshi KANESAKA

Article type: Article
1984 Volume 108 Pages 16-29
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_16

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This paper deals with a highly productive and flexible assembly of step motor coils for analogue quartz watches. There are many models in watch coils with diameter of 15to 23 micro-meters and with turns of 5,000 to 12,000. The Coil Assembly System is called CAS-20, whereby 200,000 parts are assembled pef month. There are two types of assembly machines. One is called CAS-20 K, which assembles a core plate, two coil frames, and a circuit plate, while the other is called CAS-20 M, which is composed of two winding units, a welder, an inspection unit, and so on. The system consists of one CAS-20 M and some (5 on average) CAS-20 M, where the number of CAS-20 M required depends on the specifications of the coil to be produced. The system has the fol1owing distinctive features:- 1. high productivity such that two operators. are enough to drive this sytem, 2. easiness for changing models, whthin a few minutes for each machine, and 3. unique and precise winding unit with air spindle, which rotates with the muximum speed of 5,000 r.p.m.

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Analogue Quartz Chronograph

Toshimasa IKEGAMI, Tatsuo MORIYA, Ken-ichi USHIKOSHI

Article type: Article
1984 Volume 108 Pages 30-41
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_30

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An anologue quartz timepiece, Cal. 7A28, the first Analogue Quartz Chronograph in the world, is reported here, which is operated by four independent driving motors. Cal. 7A28 is an Analogue Quartz Chronograph with the improved levels in time measuring efficiency, time accuracy, reliability, and maintenance, and also is an analogue quartz timepiece including complicated and multiple functions. In this paper, the operating performance, structure of the movement, and the electronic circuit are discussed in connection with the fine mechanism and the microelctronics. This paper may serve to promote analogue quartz timepieces equipped with multiple functions.

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Electronic Watch Containing MNOS Non-Volatile Memory

Itsunari HAYABUCHI

Article type: Article
1984 Volume 108 Pages 42-51
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_42

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There are several problems as listed below in packing the MNOS memory in the CMOS for watch use, which consists of an IC with low. breakdown voltage; 1) High voltage applied to the semiconducting non-volatile memory in writing or erasing state either breaks the peripheral IC's or causes an errorneous operation in nearby circuit. 2) If the service life of a watch be assumed 10 years, that of the semiconducting non_volatile memory packed in it is required more than 10 years. The most appropriate structure to fulfill this condition has not yet been investigated. 3) The most appropriate structure of the semiconducting non-volatile memory to match with the CMOS for watch use has not yet been clarified. We tried to improve the production of thin oxide, the decay rate in writing state, and the method of writing and erasing, in order to solve the above-mentioned problems. Thus, we have succeeded in the production of watches containing MNOS non-volatile memory.

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New Display Method for a Perpetual Calendar

Yoshiaki WATANABE, Nobuhiro KONDO, Masanori FUJITA

Article type: Article
1984 Volume 108 Pages 52-62
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_52

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We studied the displaying method for a perpetual calendar. As a result, two simple and intelligible methods have been contrived. In this paper, the displaying method, wiring of date display electrodes, and the driving method of liquid crystal calendar display are described.

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[title in Japanese]

[in Japanese]

Article type: Article
1984 Volume 108 Pages 63-65
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_63

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

Article type: Article
1984 Volume 108 Pages 66-70
Published: March 25, 1984
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.108.0_66

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