John Peter Isaie Poncy

Specification of John Peter Isaie Poncy - Clocks and Chronometers - No. 8602

Catalogue no: 1039
Dewey No: Subject(s): Patents
Author(s): John Peter Isaie Poncy
Total pages: 6 Illustrations: 1 fold out Language(s): English Publication date: 1840
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile
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Notes:
Relates to; Improvements in Clocks and Chronometers". The patent involves, "the mode of constucting chronometers and clocks, in order to their going for a longer period without being wound up, and in such a manner that two mainsprings are used in combination with what I call a constant power or regulator, whereby the power of the two springs is transmitted to the escapement by means of such constant power or regulator." Reprint of 1856 Malcolm Gardner, Horological Bookseller sticker on cover and first page
Room location: Library Cabinet: Q Shelf: 4
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