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The first Atmos clock was designed by Jean-Léon Reutter, an engineer in Neuchâtel, Switzerland, in 1928. [5] [6] [7] This noncommercial prototype, which predated the Atmos name but is now known unofficially as Atmos 0, was driven by a mercury-in-glass expansion device. The mechanism operated on temperature changes alone.
In May 2013 the NIST-F1 cesium fountain clock reported a u B of 3.1 × 10 −16. However, that BIPM report and the other recent reports are based on an evaluation that dates to 2005. [ 4 ] It used a model developed by NIST [ 5 ] to evaluate Doppler frequency shifts, known as distributed cavity phase, some believe to be incorrect. [ 6 ]
NIST-F1, a cesium fountain atomic clock used since 1999, has a fractional inaccuracy (δf / f) of less than 5 × 10 −16. The planned performance of NIST-F2 is δ f / f < 1 × 10 −16 . [ 3 ] At this planned performance level the NIST-F2 clock will not lose a second in at least 300 million years.
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ATMOS 2000, a 155 mm/52 calibre self-propelled gun system; Atmos clock, a mechanical torsion pendulum clock manufactured by Jaeger-LeCoultre; Dolby Atmos, a surround sound technology; EMC Atmos, a cloud storage services platform; Ford FX-Atmos, a concept car built by the Ford Motor Company; Oric Atmos, a model of 6502-based home computer
Aug. 7—MIDLAND — To raise awareness about the importance of safe digging, Atmos Energy celebrates 811 Day annually on Aug. 11 as a reminder for everyone to help protect underground utility ...
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Regular maintenance of a clock can ensure its long-term preservation. Conservation experts advise clocks need to be serviced regularly. A clock is a complex mechanical contraption made of a variety of materials and with many small moving parts. [10] Even under perfect conditions lubricants deteriorate.