Atomichron

Atomichron

The Atomichron was the worlds first commercial atomic clock, built by the National Company, Inc of Malden, Massachusetts. It was also the first self-contained portable atomic clock and was a caesium standard clock. More than 50 clocks with the trademarked Atomichron name were produced.cite journal|last = Forman|first = P|date = July 1985|title = Atomichron®: The atomic clock from concept to commercial product|journal = Proceedings of the IEEE|volume = 73|issue = 7|pages = 1181- 1204|issn = 0018-9219|url = http://www.ieee-uffc.org/freqcontrol/atomichron/automichron.htm] cite web|title=The Global Positioning System|url=http://www.beyonddiscovery.org/content/view.pdf.asp?a=458|accessdate=2008-04-23] cite news|title=Science Update|work=The Dallas Morning News|date=1989-10-02] cite book|title=The Global Positioning System: The Path From Research to Human Benefit|publisher=National Academy of Sciences|date=1996|pages=7|url=http://books.nap.edu/openbook.php?record_id=9479&page=7]

References

External links

* [http://www.qsl.net/jms/bio_rem/bhnc.html A Brief History of the National Company, Inc]


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