FIELD: chronology, namely, mechanical devices and methods for determining dates, months and years of moon Moslem calendar, possible use, in particular, in chronological and clock mechanisms for determining dates, months and years of Moslem Hijri calendar connected to moon cycle, which shift constantly compared to Gregorian calendar which is connected to sun cycle, also may be used during manufacture of watches or pocket watches or clock devices with Moslem Hijri calendar or other devices with moon-based time cycle.
SUBSTANCE: in accordance to the invention, in Moslem calendar the scale of dates comprises serially positioned digits or marks of dates of even moon month from 1 to 29 and digits or marks of dates of odd moon month from 1 to 30. The scale of dates may be made in form of a circle with two sectors, one of which contains digits and marks of dates of even moon month from 1 to 29, distributed evenly along a circle, and another one of which contains digits and marks of dates of odd moon month from 1 to 30, distributed evenly along a circle. The scale of dates may be made immovably, and device for showing a date on scale of dates may be made in form of rotating arrow pointer, with possible pointing at appropriate date on scale of dates from 1 to 29 on sector of dates of even moon month or pointing at appropriate date on scale of dates from 1 to 30 on sector of scale of dates of odd moon month. The scale of dates may be positioned on rotary disk, and device for showing a date on scale of dates may be made in form of a window in clock index plate with possible showing of corresponding date from 1 to 29 on date sector of even moon month of the scale of dates in the window, or showing of corresponding date from 1 to 30 on date sector of odd moon month of the scale of dates in the window.
EFFECT: increased precision, increased reliability in use, possible installation into practically any analog clock.
3 cl, 7 dwg
