Specification of George Philcox - Chronometers and other Timekeepers - No. 11,177

Catalogue no: 1046
Dewey No: Subject(s): Patents
Author(s): George Philcox
Total pages: 3 Illustrations: 1 fold out Language(s): English Publication date: 1846
Editor: Publisher: The Great Seal Patenet Office
Dimensions: 290mm x 200mm Condition: Blue paper cover missing
Related titles: Related library records:
Relates to; "Improvements in the Construction of Chronometers and other Timekeepers". Patent describes the use of two balance springs, either helical or spiral, on a single balance wheel, so arranged that when one balance spring is fully opened, the other is fully closed, "by which means I am enabled to neutralize the error of a chronometer spring when acted upon by variations of temparature".
Room location: Library Cabinet: Q Shelf: 4
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