摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism capable of correcting automatically a permanent calendar in every 400 years. SOLUTION: This permanent calendar has the additional mechanism (4-13) assembled in a calendar mechanism, the additional mechanism has the last gear 13 one-rotated in 400 years, a stage of a cam 13' supported by the gear 13 is cooperated with a lever 9 rotated around the gear 6 as the center, the gear 6 supports a satellite 7 attached to a February cam 7', and the cam 13' 1/4-rotated in every 100-year has three low stages for retreating the lever 9 to bring the cam 7 pushed by a compound lever 2 into the same position consecutively three times for 2100, 2200 and 2300th years, as to the month with 28 days of February, and for moving thereafter the lever to a high stage to restore 29th of February in the 2400th year. COPYRIGHT: (C)2007,JPO&INPIT
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