Methods and apparatus for providing ultra-stable frequency stand

Details Methods and apparatus for providing ultra-stable frequency stand Methods and apparatus for providing ultra-stable frequency stand

1977-05-23

1980-12-30

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310311, 310318, 368159, H01L 4100

Patent

active

042426111

ABSTRACT:
Improved clocks and frequency standards are provided through the use of single crystals having a mass of the order of kilograms maintained at temperatures of the orders of few degrees Kelvin which are caused to vibrate freely at low modes of resonant vibration. The frequency stability of such vibrations is ultra-stable over long periods of time and provide frequency standards and clocks having stability orders of magnitude greater than clocks and standards based upon quartz crystal oscillators and equal or better than standards and clocks based upon atomic beams (cesium, rubidium and hydrogen masers).

REFERENCES:
patent: 1823329 (1931-09-01), Marrison
patent: 2176653 (1939-10-01), Bokovoy
patent: 2925502 (1960-02-01), Franx
patent: 3258617 (1966-06-01), Hart
patent: 3353400 (1967-11-01), Schafft
Quartz Oscillators and Their Applications, by P. Vigoureux, 1939, Chapters VII, VIII and X. (pp. 73-95, 100-113).

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