Clock Working
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 Vintage Westclox Dialite Alarm Clock Model 22090 22540  US $2.50
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 1960s JAEGER LECOULTRE Swiss DESK CLOCK 8 day w DATE 362 mid century modern US $282.00
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 ANTIQUE SESSIONS PARLOR KITCHEN CLOCK MOVEMENT ALARM HANDS GONG TO RESTORE US $71.77
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 Seth Thomas travel alarm clock photo frame doors works fine US $9.00
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 VINTAGE SESSIONS BANJO ELECTRIC WALL CLOCK WITH EAGLE NH COVERED BRIDGE PHOTO US $6.99
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 Lot of 4 travel alarm clocks all workFlorn Westclox Elgin Seth Thomas US $20.00
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 Vintage Art Deco Musical Alarm clock by Essex Watch Co works US $35.00
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 AD MOUGIN DEUX MEDAILLES 3pc FRENCH PORCELAIN ROMEO JULIET CLOCK GARNITURE set US $1,205.00
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 VINTAGE GE PLASTIC ELECTRIC ALARM CLOCK TOOTSIE ROLL FEET US $9.50
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 Antique Big Ben Alarm Clock 1911 US $105.39
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 Harley Davidson Wall Clock With Cycle Sounds Each Hour US $9.99
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 Howard Miller US $1,300.00
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 Ansonia wall clock movment w westminster chime working US $20.00
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 German Owl Clock novelty Clock works marked Unghuns US $50.00
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 Vintage Metal Horse United Self Starting Clock w Wood Base US $42.00
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 glass Ball mechanical Pocket watch clock US $.99
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 ANTIQUE INGRAHAM ADRIAN BLACK ORNATE MANTEL SHELF CLOCK RUNNING 8 DAY OLD US $61.00
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 Junghans Dome Clock 8 1 2 Glass Dome US $29.99
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 LUX CLOCK MFG CO MINIATURE SCOTTIE DOG SCOTTIE PENDULETTE CLOCK WATERBURY CONN US $79.99
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 Vintage Original Concord Watch Co 15 Jewels 3 adjustment Swiss 8 day clock US $6.32
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 1980s honda goldwing display Novelty clock motorbike motorcycle not perfect ad US $3.00
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 Vintage Westclox Big Ben Alarm Clock Illuminated Glow in Dark Hands Green Face US $9.99
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 WOODEN BULOVA QUARTZ WALL CLOCK WITH HERBS BERRIES DRIED FLOWERS PINE CONES US $9.99
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 1840 OGEE ANTIQUE WALL CLOCK ROME ITALY SCENE HAND PAINTED WORKING WRITTEN NOTE US $190.99
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 VINTAGE BRONZE TONE METAL DECORATIVE MANTEL SHELF QUARTZ CLOCK INDIA US $19.99
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 Sessions Antique Mantel Clock Solid Black Wood Case 4 Pillar MINT MUST SEE US $80.00
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 Vintage 60s BLESSING travel alarm clock Red white bell works Triberg Germany US $12.00
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 Vintage 60s BLESSING travel alarm clock BLUE white bell works Triberg Germany US $10.00
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 SEIKO QUARTZ ART DECO CLOCK WORKS EXCELLENT US $13.00
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 SNAP ON CLOCK PRETTY GIRL SEXY FREE SHIPPING US $40.00
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 Master Crafters Clock Lighted Sun Electric US $19.99
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 POWERPUFF GIRLS ALARM CLOCK PINK SMALL New in package US $4.99
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 brass work Ship Rudder Clock US $68.00
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 China Vintage Bronze Mechanical Pocket Watch Clock US $.99
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 New work brass pipa clock US $78.00
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 Old Vintage Seth Thomas Alarm Clock Runs Looks Nice US $7.60
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 Vintage Black Forest Cuckoo Clock West Germany for parts needs parts US $20.50
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 VINTAGE ARTCO WIND WALL CLOCK 50S US $9.99
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 Excellent Tiffany Co Portfolio Brass Quartz Desk Clock Works Battery Powered US $34.89
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 Works great copper cloisonne mechanical carriage Clock US $49.99
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 Seth Thomas Regulator School House Clock Key Wind Clock 8 Day Clock Works US $19.99
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 Linden Black Forest Musical Alarm Clock Great condition US $14.63
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 Vintage Simplex School Clock 507 049 US $8.99
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 Bugs Bunny Talking Alarm Clock W Box WORKS Hear Recording Eh Whats Up Doc 162 US $121.99
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 GOOD ANTIQUE PENDULUM FOR CLOCK US $9.99
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 Vintage Europa with 7 Jewels Music Alarm Travel clock US $15.00
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 precious moments two angels table top caraige clock brass tone Seth Thomas US $9.99
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 Vintage landshire mantel shelf clock NR always US $2.99
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 1 VINTAGE PHINNEY WALKER TRAVEL WIND UP ALAM CLOCK GERMANY US $9.95
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 Vintage Wooden STEEPLE CLOCK ENDURA Made in FRANCE Shelf Mantel Mantle US $14.99
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 50s 60s Wall Clock w Blue Yellow Flowers Tin Face Working US $35.00
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 VINTAGE RETRO CERAMIC OWL WALL CLOCK US $19.00
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 Vtg PANASONIC Sure Time DIGITAL CLOCK RADIO Wavy Simulated Wood Grain RC 76 US $12.88
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 VINTAGE R CARR DESK CLOCK HALLMARKED STERLING SILVER BORDER US $28.00
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 Vintage Art Deco Jefferson Golden Hour Mystery Clock Electric Parts or Repair US $31.99
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 Seth Thomas US NAVY Mark I Deck Clock WWII 1941 WORKING WITH KEY US $250.00
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 50s 60s Westclox Wall Desk Table Clock w Flip Date Blue Black Silver US $24.99
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 OLD WATERBURY MANTLE SHELF CLOCK PENDULUM BOB PARTS US $11.00
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 VINTAGE EAMES ERA RETRO STARBURST ATOMIC WALL CLOCK IRON 25 HOLLYWOOD REGENCY US $49.99
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 Vintage Bulova Desk Clock Very Cool Model B 2171 Made in Japan US $9.99
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 Franklin Mint Royal Geographical Society World Globe Clock working US $595.00
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 Ridgeway Triple Chime Wall Clock Model 701 Key Wound with Franz Hermle 341 023 US $389.99
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 19th Century Black Forest Cuckoo Clock Great Carving Parts or Restore NR US $52.99
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 LOT OF 8 VINTAGE ALARM CLOCKS LK NR US $9.99
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 1 ELGIN QUARTZ BATTERY OPERATED ANNIVERSARY CLOCK WITH GLASS DOME US $10.95
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 Ridgeway Mantle Clock Cherry Wood Key Wind With Chime US $150.00
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 Vintage Mantel clock Bear US $98.00
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 VINTAGE TRAVEL ALARM CLOCK PHINNEY WALKER GERMANY GLOW IN DARK NUMERALS WORKS US $6.00
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 Vintage General Electric Peter Max Electric Alarm Clock US $42.00
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 Vintage General Electric Telechron Electric Alarm Clock US $19.99
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 Chime Clock movements battery FOR PARTS Japan US $7.99
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 VINTAGE BRASS HORSE SHELF MANTEL CLOCK UNITED CORP US $59.00
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 VINTAGE BRONZE HORSE SHELF MANTEL CLOCK SESSIONS US $79.00
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 Working brass enclosed 1964 Silver coin clock US $75.00
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 Blessing Travel Alarm Clock Folding Windup US $40.00
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 Seth Thomas antique marble desk clock WORKS electric beautiful condition US $10.00
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 Antique Waterbury Pendulum Clock US $249.00
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 Vintage 1970s Sunbeam Alarm Clock black and white Bedroom clock US $2.25
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 Vintage Howard Miller Oak Wood Frame Strike CLOCK Excellent US $99.99
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 LOT OF 4 BATTERY OPERATED WALL AND SHELF MINI CLOCKS US $3.99
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The Way an Atomic Clock Works
Atomic clocks are the most accurate chronometers we have. They are millions of times more accurate than digital clocks and can keep time for hundreds of millions of years without losing as much as a second. Their use has revolutionised the way we live and work and they have enabled technologies such as satellite navigation systems and global online commerce.
But how do they work? Strangely enough, atomic clocks work in the same way as ordinary mechanical clocks. But rather than have a coiled spring and mass or pendulum they use the oscillations of atoms. Atomic clocks are not radioactive as they do not rely on atomic decay instead they rely on the tiny vibrations at certain energy levels (oscillations) between the nucleus of an atom and the surrounding electrons.
When the atom receives microwave energy at exactly the right frequency, it changes energy state, this state is constant an unchanging and the oscillations can be measured just like the ticks of a mechanical clock. However, while mechanical clocks tick every second, atomic clocks ‘tick’ several billion times a second. In the case of caesium atoms, most commonly used in atomic clocks, they tick 9,192,631,770 per second – which is now the official definition of a second.
Atomic clocks now govern the entire global community as a universal timescale UTC (Coordinated Universal Time) based on atomic clock time has been developed to ensure synchronization. UTC atomic clock signals can be received by network time servers, often referred to as NTP Servers, that can synchronize computer networks to within a few milliseconds of UTC.
About the Author
Richard N Williams is a technical author and specialist in atomic clocks, telecommunications, NTP and network time synchronisation helping to develop dedicated NTP clocks. Please visit us for more information about a Galleon ntp time server or other ntp server solutions.
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