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How Does An Atomic Clock Work?
Topic Started: Feb 6 2015, 11:06 PM (49 Views)
Webster
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Wasatch Storyteller & Resident Forum Curmudgeon
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(Digg) How Does An Atomic Clock Work?


Quote:
 
Even if this doesn't necessarily help you understand the guts of an atomic clock, it's still mesmerizing in that "how do people even think of this stuff?" way.



Thoughts?
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DrLeftover
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That thing has NOTHING on this:

Posted Image

Quote:
 
Modern digital watches can be beautifully engineered and designed items, but they will always lack the craftsmanship that their mechanical predecessors possess. This hand-wound masterpiece, declared "the most complicated watch in the world" by its maker, doesn't do anything a digital watch couldn't replicate but it does so with soul. It also costs $5 million which makes for some very expensive soul.

The Patek Philippe Calibre 89 is a timepiece fit for a queen. With more than thirty complications, it's the most complicated mechanical watch ever devised, and valued at about $6 million, it costs a king's ransom—that is, if you're even able to track one down. The Calibre 89 was built as a four-piece commemorative series of pocket watches—as in only four were ever made; white gold, yellow gold, rose gold, and platinum—honoring the Patek Philippe company's sesquicentennial anniversary in 1989.

Development of the Calibre 89 began nearly a decade earlier with the goal of making "the clock with the most complications in the world, containing all the traditional watchmaking techniques accumulated over one-and-a-half centuries," according to the Swiss Broadcasting Corp. The project took nine engineers five years of research and another four of construction to finish. And in the early 1980s there was no such thing as AutoCAD so this watch was, in every sense, completely hand-crafted.

Each timepiece is about the size of a hockey puck—3.5 inches wide, 1.5 inches thick—and weighs 2.5 pounds. That heft comes from the keyless three-barrel, double dial watch's 1,728 components including 24 hands, two dials, eight discs, a thermometer, and star chart. In all, the 18 carat case houses some 33 complications—features beyond telling the time in hours, minutes, and seconds. "It has pretty much all the complications that you can imagine for a mechanical watch," says Jean-Michael Piguet, deputy curator of the International Watchmaking Museum, told the SBC. Here's a partial list:

Sidereal time
Moon phase display
Winding crown position indicator
Century, decade, year, and month displays
Leap Year Indicator
Season
Day of the month
Day of the week
12-hour recorder
Hour of second timezone
Split second hand
Power reserve
Thermometer
Date of Easter
Time of sunrise and sunset
Equation of time
Star chart
Sun hand
Westminster chime on four gongs
"Grande and Petite Sonnerie" alarm
Going and striking train indicators
Three-way setting indicator
Tourbillon regulator

The company won't say how much it sank into creating them but each watch is valued at roughly $6 million and the set was originally sold to an unnamed royal family. In 2004, however, the white gold model sold at the Antiquorum auction house for $5 million. Not bad for a watch that still needs its clockwork hand-wound daily.


http://gizmodo.com/5994814/this-is-the-worlds-most-complicated-timepiece
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DrLeftover
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Except for maybe, THIS, except at over a ton and seven feet tall, it isn't portable.


Posted Image


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The clock stands 2.2 meters or just over 7 feet in height. It contains 1.2 tons of brass and 251 wheels on 155 pinions. It measures everything from seconds to the period it takes the firmament to make a single rotation - 25, 794 years. The clock is synchronized to UTC via a signal transmitter. An electromagnet in the clock's base advances and retards the pendulum as required to keep perfect time. The clock is powered by energy from solar panels on the Türler shop roof.

The clock contains five stations, described below:

.... (stuff)...

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The next station is the Tellurium. Here, the movements of the earth, moon and sun are shown in three dimensions, synchronous with reality. The three-dimensional nature of this dial can be better seen on the right-hand side of the last scan below.



MORE, including the other faces and dials of the clock:
http://people.timezone.com/mdisher/TurlerTextAndImages.html
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Webster
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*looks at both sets of watches in awe* Excuse me, Doc, while I go and pick up my jaw from the floor... :devil1:
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