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escapement: References & Edit History
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Assorted References
- automata
- piano action
- timekeeping devices
Article Contributors
Primary Contributors
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Jonathan D. Betts
Curator of Horology, Royal Observatory Greenwich, National Maritime Museum.
Other Encyclopedia Britannica Contributors
Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Invalidated site: US Patent number 5140565. | Jun 02, 2015 | ||
| Article revised and updated. | Feb 02, 2007 | ||
| Article added to new online database. | Jul 20, 1998 |
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