Specification of Charles McDowall - Timekeepers - N0. 13,587

Catalogue no: 1051
Dewey No: Subject(s): Patents
Author(s): Charles McDowall
Total pages: 4 Illustrations: 1 fold out Language(s): English Publication date: 1851
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Blue paper cover fragile and torn
Related titles: Related library records:
Relates to; "Certain Improvements in the Construction of Timekeepers". The patent describes a new form of "dead" escapement for pendulum clocks which "will impart an impulse to the pendulum or balance while in the middle of its vibration chiefly by a direct instead of oblique action". Reprint of 1857 Malcolm Gardner, Horological Bookseller sticker on cover and first page
Room location: Library Cabinet: Q Shelf: 4
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