Image:Early Chronometer Balance Wheels.png
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| Description |
English: Drawings of temperature-compensated marine chronometer balance wheels. These were designed during the 1st half of the 19th century by British chronometer makers attempting to improve on the standard Earnshaw balance, and win prizes at the British Admiralty Chronometer Trials. These are all attempts at solving the 'middle temperature problem'. An Earnshaw balance, when adjusted to keep time at high and low temperatures, gains as much as 4 seconds/day at middle temperatures from nonlinearity. The one on the right actually uses a tube of mercury for compensation. From Glasgow, David (1885), Watch and Clock Making, Cassell Co., p.247-256
Français : Chronomètres de marine à température compensée.
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| Source |
Downloaded from David Glasgow (1885), Watch and Clock Making, Cassell & Co., New York, p.247-256 on Google Books |
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| Date |
1885 |
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| Author |
David Glasgow |
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| Permission (Reusing this image) |
Public Domain - author died more than 70 years ago.
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[edit] Licensing
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This image (or other media file) is in the public domain because its copyright has expired. This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.
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| Date/Time | Dimensions | User | Comment | |
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| current | 06:21, 1 July 2007 | 1,169×229 (25 KB) | Chetvorno | ({{Information |Description=Experimental temperature-compensated marine chronometer balance wheels. These were designed during the 1st half of the 19th century by British chronometer makers attempting to improve on the standard Earnshaw balance, and win pr) |
