The Horological Institute of Japan (HIJ) is founded in 1948. No.1 of the Journal of HIJ is published in 1957. Mr.T.Aoki is the 1st.president of HIJ from 1948 through 1965. Mr.G.Nishimura is the 2nd.president of HIJ from 1965 through 1983. Mr.Y.Jimbo is the 3rd.president of HIJ from 1983 through 1995.
The new type of ultrasonic linear motor is reported in this paper. The motor is composed of two CFRP (Carbon Fiber Reinforced Plastic) blocks and a thin plate of PZT ceramic working as piezo electric driver. In the state of ultrasonic resonance, surface of the motor block vibrates obliquely because of the anisotropic elasticity of the CFRP material. The vibrating motor slides and moves on the base by the reaction from the base and has the tractive force. In the beginning of this paper, vibration modes of the motor are analyzed theoretically and experimentally. Then, experimental results with regard to the moving speed and the tractive force of the motor are described. The features of the CFRP motor are the simplicity of the structure and the easiness of the fabrication.
The wrist remote controller"CMD-10"is the first watch in the world which emits infrared rays to control TV and VCR sets. It contains almost all of the major brand's codes that are pre-programmed in the CPU. Once the brand number of TV or VCR is set, users can control TV functions such as channel up/down, volume up/down, and VCR functions from a distance by simply pushing buttons on the watch. This paper describes the details of IR remote signals, circuit configuration in the CPU, and the major components of the watch.
The effctive method to reduce the cost of cutting parts is to prosess them by HEADER processing (cold forging). By linking the HEADER machining punch with die, it is able to control the processed part's eccentricity up to 0.010mm. So this method is possible to be a match for conventional cutting work in working accuracy. Thus the HEADER processing for WATCH cutting parts has been realized.
A radio controlled clock that receives Japanese standard time codes on long-wave frequency has been developed in order to verify practical usefulness on technical side. Experimental results of this clock indicates that it can be used in the whole Japanese country. However, it does not mean the immediate commercialization, because the time codes on long-wave frequency has not been authorized formally in Japan. This paper reports experimental results to recognize the situation of LF radio controlled clocks, and a study of the next generation clocks accompanied with related technology such as a hand position detection mechanism.