Electric master clock,  1900.
Titel Electric master clock, 1900.
Caption This invention patented in 1900 by Fischer of Zurich, Switzerland, enables time indications to be transmitted from a central master clock to distant indicating or ‘slave’ dials. The electrical circuit remains closed throughout, and every minute the armature of a simple dynamo, driven by the clock weight, is sharply rotated, sending a pulse of current to its subsidiary dials. Successive rotations are in alternate directions and so are the pulses of current. The system has been used to a considerable extent, both in the United Kingdom, under the trade name ‘Magneta’, and throughout Europe., 6997474
Aufnahmedatum 01.01.2009
Bildnachweis Science & Society / FOTOFINDER.COM
Bildname 10239973
Bildgröße 2532px x 3504px, 21,40 cm x 29,70 cm (300 dpi)
Model Release Kein Model Release vorhanden
Property Release Nicht spezifiziert

Land Switzerland
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Fotofinder.com Bildnummer 6997474 / BBC91326C81291FA