パーペチュアルカレンダーウォッチの開発

概要

論文の詳細を見る
Many anologue quartz watches now most popular among watches, except some excellent quality watches, have a calendar function which requires the user to pull out the stem to the first position and correct the calendar at the end of the month. However, they have no perpetual calendar function in which the first day of the next month is automatically set at the end of the month. It is a great disadvantage to the user that the watch is not provided with a complete function free from manual correction of the date at the end of the month. To solve this disadvantage and to meet the needs of the market, we have developed a new type of analogue quartz watch with a perpetual calendar. In this paper, the system and the structure of the movement are described.
社団法人日本時計学会の論文
1990-06-20