Development of Multi-Function Analogue Quartz Watch Part II

Abstract

The Cal. 5T・7T series are the multi-functional analogue quartz timepieces which movement can be widely applied for chronograph, alarm, timer, worldtime display, and so on. This can be realized by the development of the CPU-IC, the bi-rotational stepping motor, and the compact and widely useful mechanism. Not only the movement size but also the operational easiness, legibility, and repairability are greatly improved as compared with the conventional multi-function watches. This paper describes the electronic circuit system and the bi-rotational stepping motor of the Cal. 5T・7T series.