Horology: time measuring systems or devices – With calendar indicator
Patent
1995-12-19
1998-08-11
Miska, Vit W.
Horology: time measuring systems or devices
With calendar indicator
36470508, G04B 1924, G06F 1502
Patent
active
057937168
ABSTRACT:
Conversion of Gregorian calendar dates to dates of a 360-day-year calendar (i.e., a calendar having twelve months of 30 days each), and 360-day-year calendar dates to Gregorian calendar dates, are performed using a single three-column 367-entry conversion table. A search table unit searches the conversion table from the bottom upwards, i.e., a table search index is initialized to a value of 367, and decremented by unity each time a comparison is made and a match is not found. A first field in each row of the conversion table contains Gregorian leap year calendar days-of-the-year, a second field in each row contains Gregorian non-leap year calendar days-of-the-year, and a third field in each row contains 360-day-year calendar days-of-the-year. A graph of Gregorian days-of-the-year versus 360-day-year days-of-the-year has both vertical and horizontal sections. If a conversion from a Gregorian date stored in a month/day character register to a 360-day-year date is to be made, the field to be searched is dependent on the value of a flag is a leap year flag register. If a conversion from a 360-day-year date stored in a 360-day-year character register to a Gregorian date is to be made, after a match between the 360-day-year date and an entry in the third field is found the value of the flag in the leap year flag register determines which field the conversion day-of-the-year is taken from.
REFERENCES:
patent: 4274146 (1981-06-01), Yanagawa
patent: 4573127 (1986-02-01), Korff
patent: 4852030 (1989-07-01), Munday
patent: 5023851 (1991-06-01), Murray et al.
patent: 5568451 (1996-10-01), Fukutani
Miska Vit W.
Platinum Technology, Inc.
LandOfFree
Date conversions with a 360-day-year calendar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Date conversions with a 360-day-year calendar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Date conversions with a 360-day-year calendar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-396675