Atkinson, Robert D'E. Formerly, Department of Astronomy, Indiana University, Bloomington, Indiana.
Duncombe, Raynor L. Formerly, Department of Aerospace Engineering, University of Texas, Austin, Texas.
Last reviewed:January 2020
Show previous versions
- Basic movement
- Power supply
- Temperature compensation
- Shortt clock
- Tuning-fork mechanism
- Related Primary Literature
- Additional Reading
A mechanical device for indicating the passage of time. Most clocks contain a means for producing a regularly recurring action, such as the swing of a pendulum, the oscillation of a spiral spring and balance wheel, the vibration of a tuning fork, the oscillation of a piezoelectric crystal, or the comparison of a high-frequency signal with the radiation from the hyperfine structure of the ground state of atoms. This article describes the refinements of mechanical clocks. See also: Atomic clock; Quartz clock; Watch
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information