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Brass
WWVB Clock
Dial: 6-1/8". Base: 8-5/8". Depth: 1-7/8". |
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Radio
Control Clocks Nothing is measured more precisely than time! Since the beginning of time, man has been fascinated with the measurement of time and has devised more accurate machines to trap and measure time. Today, time is precisely controlled in the United States by the most accurate clock in North America, the atomic clock of the US National Institute of Standards and Technology, Time and Frequency Division in Boulder, Colorado. |
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A Team of atomic
physicists continually measures every second of every day to an
accuracy of ten billionths of a second per day. These physicists
have created an international standard, measuring a second as 9,192,631,770
vibrations of a cesium 133 atom in a vacuum. This atomic clock regulates
the WWVB radio transmitter located in Fort Collins, Colorado, where
the exact time signal is continuously broadcast throughout the United
States at 60 kHz to take advantage of stable longwave radio paths
found in that frequency range. Radio waves at these low frequencies
use the earth and the ionosphere as a wave-guide and follow the
curvature of the earth for long distances. |
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| The built-in antenna system will receive the WWVB signal anywhere in North America where long-wave reception is undisturbed. A microprocessor activates the receiver and process the time signal from Fort Collins overnight. Even adjustment for daylight savings time, and leap second are automatic. | |||||||||||||||||
| Brass WWVB Clock This traditional looking clock is housed in a brilliant polished brass case, lacquered to keep its shine for many years to come. To set up your Weems & Plath radio control clock insert a AA battery, select your time zone with the clearly marked knob, and then hang it on the wall, the clock will then set itself to the exact time. Each instrument is provided with complete instructions, mounting hardware, lifetime warranty, and a fresh battery. Wt. 19.4 oz. 552000 Brass WWVB Clock...........Sale Price$110.00 |
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