Some knowledge of perpetual calendar watch

The Gregorian calendar that we use today is a dating method that originates in Western societies. According to the Gregorian calendar, a year has 365 days. The months January, March, May, July, August, October and December shall be the main months with 31 days respectively; the months April, June, September and November are the second months with each 30-day period; February in turn years has 29 days and February in flat years has 28 days.

What is a clock with an eternal calendar?

The calendar of a typical mechanical clock is designed for a cycle of 31 days. Therefore, the date must be manually postponed by one day each small month with only thirty days. A clock with an eternal calendar automatically recognizes the main month (31 days), the second month (30 days) and the February month (28 days) in one year and automatically jumps to the first. next month. A clock with an eternal calendar, which takes place automatically on the 29th in turn years, which take place every four years.Cancelled on February, is defined as the "great eternal calendar", a clock that in years of change does not the 29. Shows February and has to be adjusted once every four years is called "small eternal calendar". A mechanical clock with an eternal calendar must not be reproduced for at least a hundred years if it is running correctly.

The history of the clock with eternal calendar

In the 1762 year, English watchmaker Thomas Mudge created the first pocket watch with an eternal calendar in the history of mankind.

In the 1864's, Patek Philippe developed the first pocket watch with an eternal calendar.

In the 1884's, Vacheron Constantin produced the first pocket watch with the brand's eternal calendar.

1889, Patek Philippe patented the technology of the eternal calendar, the last important technology that influenced the clock industry during the lifetime of Adrian Philippe, one of the founders of Patek Philippe (he invented 1844 the keyless elevator).

In the 1925s, the first clock with an eternal calendar was introduced in history. It was also the first clock with an eternal calendar by Patek Philippe (No 97975). Since then, the Eternal Calendar has been the most important complication in Patek Philippe's clocks.

1941 was launched by Patek Philippe, 1526, the first watch in series with an eternal calendar.

1955's Audemars Piguet launched its first serial watch with an eternal calendar.

1984: The first ultra-flat watch produced in series with an eternal calendar by Vacheron Constantin.

1985, the Patek Philippe 3940 influenced the design of the modern clock with an eternal calendar with its famous machine work Caliber 324SQ. The Patek Philippe 3940 was one of the longest running clocks with an eternal calendar in history until 2006 was replaced by the 5140. The third generation of the Stern family, owned by a Patek Philippe. Philippe Stern's favorite clock complication was the eternal calendar, and the clock he wore the longest was the 3940 which he wore for more than thirty years and which was an "indispensable part of the life of Mr. Philippe Stern".

1985, the Da Vinci Perpetual Calendar (with chronograph function) was launched, the first watch in series with eternal calendar and the first watch with eternal calendar in history that has an annual display. At the same time, the Da Vinci Perpetual Calendar, due to its relatively "affordable" price, became for some time the most sold clock with an eternal calendar.

After the 2000's, the eternal calendar as well as the tour car was developed by many brands, and only a few of the top brands were able to produce it.

A clock with an eternal calendar can be divided into two parts, one of which is responsible for the general time measurement of hours, minutes and seconds, while the other operates via a system of miniature satellite wheels, which the complexity of the calendar in terms of small and large months, switching years, etc.calculation.For lovers of watches with eternal calendar, the last day of February is the most expected day of the year. In the case of a switch year, the clock is considered at midnight and the 28. February jumps to the 29th, before he gets to the 29th. at midnight on the 1st. March jumps, an exciting event for lovers of watches with eternal calendar.

The mechanics of a clock with an eternal calendar

In a clock with an eternal calendar there is a four-year-old wheel with 48 teeth and a monthly disc with 48 divisions on the top that rotates clockwise, a turn in four years for each tooth that is rotated. On the left is the universal tilt switch. The current position is March 3rd. flat year, immediately after February, which is 28 days away from the analysis of the depth of the notches, the next is 30 days in April;next year is a year of change, as February of this year is 29 days away from the analysis of the depth of the notches.

The effect of the calendar knob is controlled by the position of the four-year-old wheel in relation to the effect of the eternal knot;the diagram shows a condition in which the calendar knob is controlled in such a way that it gradually passes through one tooth per day;Considering the previous month, it must have been controlled so that at the end of the month it passes through three teeth (29, 30, 31) at once.

In order to analyze the functioning of the lunar wheel, you have to know that it has 31 teeth that rotate by one tooth per day, i.e. one rotation per month;only one of these teeth is longer, and only this longer tooth can come into contact with the teeth of the four-year-old wheel, so that the four-year-old wheel rotates around one tooth per month.

The depth of the position between the four-year-old wheel and the universal crank lever determines the extent of the change in the movement of the calendar crank at the end of the month. Is it one tooth a day, two teeth a day?Or is it three or four teeth a day?And so the "eternal calendar" completes its complex task.

The interesting thing about the clock with eternal calendar

The magic of mechanics has made it possible to see this amazing function of time measurement. For watch lovers and especially for lovers of eternal calendars, the last day in February is a holiday- they see as the date for February directly from 28th. February 1st. March jumps(in the case of a normal calendar clock, the calendar must be set manually for each month, including for February, and also for the smaller 30-day months, as the date The Shift Year is a big holiday every four years!---- look at the date on 28th and 29, which is only in February in a Shift Year, and then look late in the Naand jumps straight to March 1st!

Eternal calendars are complex and mechanically demanding. Most clocks with an eternal calendar cannot be easily set after stopping. Most people who own a clock with an eternal calendar have a timer and let it pick up the clock if it is not worn, thereby ensuring that the clock is running correctly with an eternal calendar and time does not have to be set. Mechanical clocks are, of course, prone to errors, and occasionally the clock needs to be reset and corrected. In this way your clock with eternal calendar really runs "forever". Whenever you wear them, your watch will show you the time, date, day of the week, month, moon and other time information.

Those who prefer a clock with an eternal calendar should also distinguish between a "full calendar", an "annual calendar" and an eternal calendar, because although the time information shown on the dial is almost identical, they are very different from an eternal calendar, especially a clock with a full calendar. The complete calendar only indicates the date, the weekday and the month, but it does not automatically distinguish between large and small months, February and trading years, so that it must be manually adjusted at least five times a year (February, April, June, September and November), during the annual calendar does not come as close to the eternal calendar as the automatic detection of February and switch years should be, so that it has to be adjusted manually once a year (February). The eternal calendar will not be adjusted manually for a century.

But now you don't have to bother with your perpetual calendar watch. Choose a watch winder for your perpetual calendar watch, and you don't have to worry that the perpetual calendar watch will stop.