John Roger Arnold

Secification of John Roger Arnold - Expansion Balance For Chronometers - No. 4531

Catalogue no: 1023
Dewey No: Subject(s): Patents
Author(s): John Roger Arnold
Total pages: 3 Illustrations: 1 Language(s): English Publication date: 1821
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper covers fragile
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Notes:
Relates to, "A New or Improved Expansion Balance for a Chronometer". Describes a bi-metallic balance which has two vertical arms, each with a weight that is moved either towards the centre of the balance or away from it when the temparature rises or falls. Reprint of 1857
Room location: Library Cabinet: Q Shelf: 4
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