Specification of Thomas Wright & Alexander Bain - Application of Electric Currents to railway Signalling, Telegraphs, &c. - No. 9204

Catalogue no: 1047
Dewey No: Subject(s): Patents
Author(s): Alexander Bain, Thomas Wright
Total pages: 10 Illustrations: 4 fold out Language(s): English Publication date: 1841
Editor: Publisher: The Great Seal Patent Office
Dimensions: 290mm x 200mm Condition: Only front cover remains detached and very frayed and fragile
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Notes:
Relates to; "Improvements in applying Electricity to Control Railway Engines and Carriages, to Mark Time, to give Signals and Print Intelligence at Distant Places". Although most of the 9 innovations listed in this patent are not concerned with horology, the 3rd in the list is, "the application of the deflection of the electric conductor to the movement of timepieces". It describes an early form of slave dial as follows; "A current is sent through the wire every minute which causes the coil to deflect and thus on its return draws the ratchetforward a tooth and thus moves the hand
Room location: Library Cabinet: Q Shelf: 4
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