Specification of John Gottlieb Ulrich - Chronometers - No. 7350

Catalogue no: 1032
Dewey No: Subject(s): Patents
Author(s): John Gottlieb Ulrich
Total pages: 10 Illustrations: 6 fold out Language(s): English Publication date: 1837
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Paper covers and illustrations torn
Related titles: Related library records:
Relates to "Certain Improvements in Chronometers". The patent describes six improvements as follows; An improved escapement designed to prevent stoppage from sudden shocks. A compensation device for the balance, another for the pedulum of an astronomical timekeeper, and the use of non magnetised material. A mechanism for stopping the hands of a watch without stopping the mechanism. A new method of locking and unlocking the striking parts of those chronometers that sound the time. A mechanism for releasing the striking parts of an alarm. A method of preventing the oxidisation of the springs of a chronometer A reprint of 1857
Room location: Library Cabinet: Q Shelf: 4
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