Clock Runs
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 Kassel™ Hand carved Cuckoo Clock  US $49.00
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 Leroy French Carriage Clock US $316.99
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 VINTAGE LATE 50S EARLY 60S SESSIONS CEREMAC ELECTRIC CLOCK US $24.99
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 Antique Big Ben Alarm Clock 1911 US $105.39
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 VINTAGE BEAUTIFUL WARMINK BURL WALNUT WOOD CARRIAGE CLOCK WUBA US $123.50
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 FANCY VICTORIAN TEAR DROP MANTLE CLOCK W ORIG GLASS US $99.99
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 Sessions Antique Mantel Clock Solid Black Wood Case 4 Pillar MINT MUST SEE US $80.00
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 Hello Kitty Cute Cubic LCD Desktop Alarm Clock Thermometer Flash Glow White S8IT US $8.70
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 Old Vintage Seth Thomas Alarm Clock Runs Looks Nice US $7.60
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 Mastercrafters Model T Car Elecric Wall Clock US $10.00
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 Sears Roebuck Craftsman Black Saw Blade Quartz Wall Clock US $3.00
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 vintage maritime ships SOLID BRASS GIMBALS SHIPS CLOCK US $24.99
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 Santa Barbara Ceramic Design Copyright 1989 Humming Bird Flowers For Wall Shelf US $3.13
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 ANTIQUE SET THOMAS MANTAL CLOCK RUNS CHIMES GREAT NR US $46.00
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 1907 SETH THOMAS CRYSTAL REGULATOR RUNS GREAT US $127.50
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 STRANGE DIFFERENT BRONZE ART DECO DESK CLOCK CHEMO COMPANY ADVERTISING Doctor US $24.99
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 LOT OF 4 BATTERY OPERATED WALL AND SHELF MINI CLOCKS US $3.99
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 1981 Hermle Black Forest Grand Mother Clock US $550.00
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 NICE 26 1 4 X 15 LIGHT UP TWIN TOWERS WALL CLOCK ELECTRIC WORKS GOOD US $19.99
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 Art Deco KIENZLE Large ALARM CLOCK chrome BAUHAUS vintage MACHINE AGE 1930s US $56.00
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 OLD RARE ANTIQUE VINTAGE CUCKOO COOCOO CLOCK LUX WATERBURY CT NATURE SCENE NR US $26.95
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 RARE AND BEAUTIFUL INGRAHAM OAK HANGING KITCHEN CLOCK US $151.38
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 ANTIQUE WESTCLOX ALARM CLOCK DECO CASE WORKS US $23.00
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 VTG BAKELITE PLASTIC TELECHRON ELECTRIC CLOCK RUNS GREAT US $20.00
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 German Cuckoo CLOCK with Weather Station MINT US $59.99
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 ANTIQUE LARGE BRONZE LANTERN CLOCK BELL US $80.00
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 French Art Deco Wall Clock by JAZ Station Style Vintage Antique Machine Age 30 US $46.00
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 Vintage International School Office Wall Clock Round Metal Slave Clock 1939 US $31.00
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 Art Deco 8 DAYS KIENZLE Mantel CLOCK Bauhaus 1910 OAK Vintage Antique US $24.39
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 Small antique French clock movement 88mm 345 US $112.51
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 Beautiful Large Hunter Cuckoo Clock W Dancers Music 2 Tunes US $222.50
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 Vintage Sessions Frederickburg Pottery Tulip Clock US $34.99
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 PAIR VINTAGE JEFFERSON GOLDEN HOUR MYSTERY CLOCKS NOT RUNNING US $19.95
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 steeple clock as is 4 parts US $48.00
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 Antique Ansonia Felt Plush Covered Wall Clock Circa 1886 8 Day Still Working US $275.00
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 Antique FMauthe Spring Driven Wall Clock approx1895 US $272.00
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 Vintage ELGIN 400 Day Anniversary German Mantel Clock US $49.99
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 United Clock Co Statue of Liberty Clock US $50.00
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 Toleware Clock US $20.00
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 NEW Dynasty Polished Brass Case Quartz Seth Thomas Table Clock TGO 1197 US $24.99
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 ANTIQUE GOLD STATUE BOUDOIR CLOCK MANTEL LOOKS AND RUNS GREAT US $11.50
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 ANTIQUE MINNEAPOLIS HEAT REGULATOR THERMOSTAT WITH TIMER CLOCK MODEL TP 1918 PAT US $69.00
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 HAMBURG AMERICAN LARGE GERMAN ANTIQUE WALL CLOCK ALL ORIGINAL LOOKS RUNS GREAT US $198.49
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 Vintage Clock Parts Chelsea Clock Movement US $100.00
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 Plato Ticket flip flop Clock EVER READY US $380.00
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 German Magneto Mechanical TORSION Clock ALBION US $110.00
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 Badische UhrenFabrik CB Torsion clock 400 day clock anniversary clock RARE US $490.00
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 Plato Ticket flip flop Clock RARE US $380.00
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 Antique Rare Vintage Sallander Clock Beautiful Dutch Design FREE SHIPPING US $170.25
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 German Musical Mantle Clock with disk US $132.50
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 Vintage 8 day clock Patent 1918 Minneapolis Mod 77 Brass runs no wind key US $49.95
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 Antique General Electric Retro Desk Novelty Shelf Clock Mahogany Cabinet Runs US $55.99
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 Vintage Black Metal Wall Clock with Gold Leaves and Vines Sessions Made in USA US $9.99
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 1970s Jaeger LeCoultre ATMOS Clock Square Face ORIGINAL BOX Manual NICE US $595.00
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 Lead Cyrstal Quartz Mantel Clock Very Very Pretty LQQK US $4.99
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 Hamilton westminster chime Mantel Clock US $50.00
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 Michael C Fina WOODEN FIFTH AVENUE DESK CLOCK Quartz Movement US $4.95
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 VNTG SETH THOMAS ELECTRIC ALARM CLOCK DESK OR MANTEL WOOD 1964 MODEL E202 000 US $14.95
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 Johnny Popper John Deere Alarm Clock US $19.99
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 VINTAGE GENERAL ELECTRIC MANTEL CLOCK STRIKE RUNS EXCELLENT CONDITION US $68.00
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 OLD REGULA 1 DAY NO25 CUCKOO CLOCK MOVEMENT W BIRD US $6.99
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 antique mantle clock US $45.00
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 Seth Thomas Mantle Clock with Chime US $153.00
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 VINTAGE EVNER CLOCK WATCH CORP GERMANY BRASSTONE TRAVEL ALARM CLOCK DIAMONDS US $9.99
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 Vintage 1930s Art Deco French Jaz Alarm Clock US $69.00
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 Jerome Co Two Tone Mantle Clock US $245.00
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 Noahs Ark Ceramic Clock US $25.00
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 Vintage Brass French Style Pendulum 8 Day Carriage Clock Bell Strike Gears Runs US $149.00
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 Vintage Germany Brass Overocean Alarm Shelf Clock 35 Runs LOOK RARE NR German US $11.01
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 VINTAGE CLOCK 1952 56 GENERAL ELECTRIC TELECHRON ORIGINALITY WALL CLOCK US $55.00
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 Vintage Brass 8 Day Carriage Clock Strikes Bell w Pendulum Runs 4 Jewels Germany US $99.00
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 Antique Boardman Wells Wooden Works Clock with Signed Splat US $200.69
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 VINTAGE WINCHESTER MANTLE CLOCK WOODEN BATTERY OPERATED US $9.99
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 NESTLE KIT KAT CHOCOLATE CANDY BAR ADVERTISING BATTERY RUN WALL CLOCK US $9.99
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 Mini Grandfather Battery Wall Clock US $15.99
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 Chrysler Blue Neon Style Lighted Wall Clock Chrome Trim Ring New US $48.99
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 Dodge Ram Red Neon Style Lighted Wall Clock Chrome Trim Ring New US $48.99
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 Phinney Walker Travel Alarm Clock US $15.00
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 Antique Oak Short Drop Ingram Octagon Wall Clock with Calendar Dial US $199.99
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 Bulova Tempus Fugit Mantel Clock Westminster Chimes US $129.50
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Using Atomic Clocks for Time Synchronisation
The atomic clock is unrivalled in its chronological accuracy. No other method of maintaining time comes close to the precision of an atomic clock. These ultra-precise devices can keep time for thousands of years without losing a second in drift – in comparison to electronic clocks, perhaps the next most accurate devices, which can drift up to a second a day.
Atomic clocks are not practical devices to have around though. They use advanced technologies such as super-coolant liquids, lasers and vacuums – they also require a team of skilled technicians to keep the clocks running.
Atomic clocks are deployed in some technologies. The Global Positioning System (GPS) relies on atomic clocks that operate onboard the unmanned orbiting satellites. These are crucial for working out accurate distances. Because of the speed of light that the signals travel, a one second inaccuracy in any GPS atomic clock would lead to positing information being out by thousands of kilometres – but the actual accuracy of GPS is within a few metres.
While these wholly accurate and precise instruments for measuring time are unparalleled and the expensive of running such devices is unobtainable to most people, synchronising your technology to an atomic clock, in actual fact, is relatively simple.
The atomic clocks onboard the GPS satellites are easily utilised to synchronise many technologies to. The signals that are used to provide positioning information can also be used as a source of atomic clock time.
The simplest way to receive these signals is to use a GPS NTP server (Network Time Protocol). These NTP servers use the atomic clock time signal from the GPS satellites as a reference time, the protocol NTP is then used to distribute this time around a network, checking each device with the GPS time and adjusting to ensure accuracy.
Entire computer networks can be synchronised to the GPS atomic clock time by using just one NTP GPS server, ensuring that all devices are within milliseconds of the same time.
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 an NTP server or other NTP time server solutions.
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