著者

上原 秀夫

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.151, pp.1-10, 1994-11-25 (Released:2017-11-09)

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Until now, the sundial has hardly been made especially in pursuit of accuracy and function. The typical sundial indicating the time at the angle of the shadow of edge lines has no structure to correct the atmospheric refraction. On the other hand, the sundial using a two-dimensional dial for reading at the center position of the shadow of a sphere provides a precise design so that not only the time difference by equation of time and longitude but also atmospheric refraction can be corrected. This"astronomical precise sundial"uses a two-dimensional dial, and it is a precise and highly functional sundial designed and manufactured in pursuit of the possiblity of the sundial from the viewpoint of astronomers. As the functions of this sundial, the local sidereal time can be directly read for the first time in the world, and the various information such as the sunrise and sunset times and the azimuth and altitude of the sun can be obtained.

著者

早川 和樹 藤枝 久

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.61, no.217, pp.43-48, 2017-12-10 (Released:2018-10-11)

参考文献数

5

著者

永坂 栄一

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.53, no.200, pp.84-99, 2009-06-10 (Released:2017-11-09)

参考文献数

4

著者

土屋 榮夫

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.145, pp.56-70, 1993-06-20 (Released:2017-11-09)

著者

田村 富士夫

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.53, pp.28-43, 1970-03-10 (Released:2017-11-09)

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An electronic wrist watch vith a tuning fork oscillating at h igh frequency, for example 1,000 Hz is studied. The quality factor Q of the tuning fork is measured and, distribution of energy losses is calculated. The amplitude of the tuning fork as a function of Q and the driving current is calculated and the results are compared with the experimental values. The force factor of the transducer is calculated. Then, the characteristics of magnetic circuit of the cup composed of 78 permalloy and alnico magnet is analized and the results are veryfied by experiments. Furthermore, the motion of the indexing wheel was observed using a high speed camera, and even at l,000 Hz, it was observed that the tuning fork advanced the index wheel exactly one tooth for each cycle of vibration.

著者

池西 正孝 猿渡 朋澄

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.131, pp.14-22, 1989-12-20 (Released:2017-11-09)

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A new quartz watch, "Step Melody", has been developed. The second hand of this clock swings to and fro with a melody produced in the watch. The melody is made during the period of musical notes, while the motor to make swing the second hand is driven during the period of rests. Thus, an epoch-making watch breaking out from convention only to tell time, which make people enjoy time swinging with melody has been developed. This paper describes the construction and the operation of this watch.

著者

小平 光治 後藤 光浩 池田 勝幸 小松 秀敏

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.99, pp.30-40, 1981-12-20 (Released:2017-11-09)

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The musical alarm clocks and watches appeared about three years ago. Recently, more than lO,OOO,OOO pcs digital watches with musical alarm function are produced annually all over the world. The reason of this prosperity is that musical alarm fits more for young people's sensitivity than beep sound alarm. For there market requirements, we have developed musical chips which play comfortable melodies automatically and can be driven by low voltage source. In the process of developing them, we examined from many viewpoints such as low power supply, low current consumption, dignity of sound and frequency limits. Then we have obtained an efficient linear amplifier and excellent melody generation system.

著者

松代 正三

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌

巻号頁・発行日

vol.9, pp.25-27, 1959

著者

近藤 豊 本田 克行 津端 佳介

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.160, pp.38-48, 1997

被引用文献数

5 2

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We developed the SEIKO PULSE GRAPH which is a pulse rate training tool for runners. In pulse rate training, the strength controlled by the pulse rate instead of the speed. The PULSE GRAPH helps the training by measuring pulse rate all the time. Organization of PULSE GRAPH and the new technology for measuring pulse rate are explained as follows: The blue sensor catches pulse waves in a high S/N ratio. Although pulse waves have motional noise caused by running, a twin FFT system separates the pulse signal from the motional noise. In the present paper the sensor part is described mainly.

著者

所 毅 平野 圭

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.51, no.196, pp.1-7, 2007

参考文献数

3

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In late years the mechanical watch which a foreign-made watch was able to include attracts attention. In addition, a life pattern of the present generation is shifting on 2nd on a weekly holiday. In a market, this influence is had, and needs to a mechanical watch of the long power reserve. Thus it was the long continuance corresponding to market needs and we developed high accuracy mechanical watch (Cal.9S67).

著者

石川 和樹

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.66, no.226, pp.38-48, 2022-06-15 (Released:2023-09-13)

参考文献数

6

著者

藤沢 照彦

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.66, no.226, pp.65-72, 2022-06-15 (Released:2023-09-13)

著者

シチズン時計株式会社

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.74, pp.88-90, 1975-08-10 (Released:2017-11-09)

著者

日本時計国際規格委員会

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.78, pp.76-80, 1976-09-15 (Released:2017-11-09)

著者

井上 裕一 小田切 博之 政木 広幸

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.127, pp.3-15, 1988-12-20 (Released:2017-11-09)

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A conventional temperature compensation IC system is required to provide an oscillating capacity change-over switch in order that a normal type pace measuring instrument can be used. The new temperature compensation IC system we developed here has realized an "all logical adjustment" without an oscillating capacity change-over switch by introducing a "new method of a pace expression". It has become easier to provide a watch with high accuracy by use of the "all logical adjustment".

著者

政木 広幸

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.53, no.200, pp.74-83, 2009-06-10 (Released:2017-11-09)

参考文献数

2

被引用文献数

1

著者

横澤 幸男 藤森 弘章

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.113, pp.15-28, 1985-06-20 (Released:2017-11-09)

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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.

著者

赤尾 祐司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.61, no.217, pp.1-12, 2017-12-10 (Released:2018-10-11)

参考文献数

9

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From May 2015, leather products come in contact with human skin may not be placed on the EU market by REACH regulation if they are shown to contain over 3 ppm of Hexavalent Chromium (Cr VI). For watch strap, a large amount of chromium is contained because of chromium tanning. Even if only Trivalent Chromium is contained when manufacturing the straps, it was already proved that Hexavalent Chromium is generated subsequently by oxidation. Therefore, Hexavalent Chromium (Cr VI) Elimination Agent was developed. This agent restores Hexavalent Chromium to Trivalent Chromium and prevent oxidation of Trivalent Chromium.

著者

生野 智久

出版者

一般社団法人 日本時計学会

雑誌

日本時計学会誌 (ISSN:00290416)

巻号頁・発行日

vol.48, pp.21-32, 1968-12-20 (Released:2017-11-09)

著者

池口 英司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.54, no.203, pp.22-29, 2010-12-10 (Released:2017-11-09)