The Patent Journal

E.S.Eiffe's Patents of 1848, followed by an interesting letter of Charles Frodsham also Eiffe's reply

Catalogue no: 1470
Dewey No: Subject(s): Courtenay Ilbert Archive
Author(s): J.S.Eiffe, Charles Frodsham
Total pages: 6 Illustrations: 2 Language(s): English Publication date: 1848
Editor: Publisher: The Patent Journal
Dimensions: 220mm x 130mm Condition: Pages yellowing, some tears and staining
Related titles: Related library records:

pp. 498-500 and 611-614 extracted from the Patent Journal and roughly bound between paper covers.  Title written in ink on front cover, not in Ilbert's hand.

Details of patent:  James Sweetman Eiffe, Esq., of 48 Lombard-street, City, for certain improvements in the manufacture of astronomical and other clocks, chronometers and watches.  Patent dated December 7th, 1847. Enrolled March 31st, 1848.

Patent concerns the arms of the balance constructed out of the radial line.

Room location: Library Extension Cabinet: F Shelf: 5
Search terms: Chronometers, Temperature Compensation
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