We are developing Ferroelectric Liquid Crystal Displays (FLCDs). FLCDs have unique feature which is called memory property. We could realize the ultra low power consumption by using this feature. We can drive the FLCDs by using less than 5 volt. It is advantage in order to get the lower power consumption. We could get low power consumption system for watches by FLCDs. It may be less than 1/100 compared with STN dot type in the case of FLCDs dot type.

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The new type of micro peltier device has been developed. Its technology is applied from the manufacturing method of a micro thermoelectric generator that was developed for the thermo generating wristwatch. So this peltier device has very small shape, and moreover it has high density and high integration. For example, Qcmax of 3mm square device is 2.0W and this amount is about twice as large as conventional 4mm square one. In this paper, we describe the manufacturing methods, characteristics and specifications of the micro peltie devices.

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A thin ultrasonic motor for driving date dials of calendar in watches has been developed. The thickness of the motor is one-fourth of conventional motors for watches, and its output torque is 100 times larger. This new motor was installed in the new product called "KINETIC perpetual calendar Cal. 7D". This product has the following characteristics. a) Automatic correction of year-month and 2figure big-date indication calendar at the end of every month. b) High speed calendar drive by high torque ultrasonic motor.

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When we try to measure the run out accuracy of a tool machine spindle, we generally use both a sophisticated polished sphere as a roundness master and a condenser type probe, then we make the machine spindle rotate and we measure the master sphere surface run out attached to the spindle. This data contain not only spindle run out error but also sphere profile error. We apply multi step point method for the purpose of separation of run out error and sphere profile error. Co-axiallity; Run out center of the spindle and the center of a master sphere should be coincident almost perfectly, otherwise complete and accurate separation by the multi step method will not be applicable. We applied a newly developed two dimensional adjusting instrument on which the upper mentioned master sphere is located. This instrument consists of 4 smaller diameter columns and 1 bigger one. Bigger cylinder is elastically bent first by 4 bolts screws, then four columns deforms, too. Two reductions of bolts displacement has been done by these columns. Now it is possible to adjust the sphere center within a few or less than 1μm. We make sure the spindle run out is 1.3〜1.2μm and the sphere profile is 3.8〜3.9μm respectively within 0.1μm repeatability.

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Longitudinal collisions of elastic circular rods are treated analytically and experimentally. Analytical solutions are obtained in the form of the Fourier series. When there are certain relations between the length and characteristic impedance of two rods, the wave form of the impact force is composed of n steps of rectangles. In this paper, kinetic influences of these principal parameters of the longitudinal elastic collision phenomenon of a rod were clarified theoretically and experimentally. And the information acquired from the conventional solution was arranged by the ratio (ρCA ratio) of characteristic impedance especially about a coefficient of restitution and an energy distribution.

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This paper presents indoor positioning system based on path loss of Bluetooth wireless transmission. Algorithms for organizing ad-hoc network and multi-hop data transmission have been developed in order to cover wider area than transmission range of the Bluetooth. The system will automatically select some fixed stations that are close to the mobile station and organize a measurement area to guarantee the best position accuracy. Moving obstacles are detected and compensated for by comparing the path losses with the pre-calibrated path losses between the fixed stations. Field tests intended for job analysis at shipyard have shown that the overall accuracy of the system was 1.6[m].

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筆者は約10年間,スイスWOSTEPと提携する時計学校で時計理論の講義を続けてきた.その中で一番奇異に感じることはスイスの指導する時計教育の中に,等時性理論のカリキュラムがほとんど含まれていないことである.反面,自分たちの教えるカリキュラムは等時性に重点を置く結果になった.学生たちはその辺に大変興味を持っている.それは時計の調整をしようとすればそれらが重要になるからであろう.なぜこのような違いが発生しているのか,この辺を考察してみた.

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This is a short history of Japanese watch industry after the second world war. In Japan, clock industry started in 1860s, and watch industry began in 1890s. Watch and clock industry developed rapidly, but in 1941 the second world war broke out, so that these industries were stopped for the munition production. Since the war, from 1945, these revived, then high quality and big quantity were required. I try to report of watch industry development, on products research and production technology.

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