GB1414010A - Calendar timepiece - Google Patents

Abstract

1414010 Calendar watches CITIZEN WATCH CO Ltd 2 July 1973 [30 June 1972 14 July 1972] 31370/73 Heading G3T In a calendar watch having hands 3-5 and a dial 2 with windows 2b, c through which a calendar disc 6 and a month disc 7 are visible, the window 2b shows dates corresponding to a complete month and a crown 11 is provided for setting the month disc and for bringing the dates into line with the correct ones of day markings 2d on the dial. As shown a pinion 17 on stem 11c meshes with teeth 6b of the disc 6 or, if the crown is pulled out, with teeth 7c of the disc 7. The disc 6 is transparent to make visible a day and date indicating dial 9. This dial is advanced by one step per day by the timepiece movement 12 and carries a number of angularly and radially spaced indicating marks of which marks 9a and 9f are shown in Fig. 1. The month is indicated by a frame 8 which is fixed to the disc 6 and embraces at least one of numerals 7a on the disc 7, brackets being used to show the months of a leap year. At the end of the month, the crown 11 is used to turn the disc 6 to restore day to date correspondence, the frame 8 automatically moving to the next month. If the last day of the month is a Saturday, the dial 9 must also be adjusted. Other embodiments are described in which the correct month is shown in a fixed, narrow window (208)', Fig. 8 (not shown) or part of a window (108), Fig. 6 (not shown). The two positions of the calendar adjusting stem are then used to move the month and date discs together or to move one of the two alone.