Siemens Bros & Co London 15049 Galvanometer Antique Telegraph Instrument Rare
£200.00
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Siemens Bros & Co London 15049 Galavanometer Antique Telegraph Electric Current Testing Instrument Rare.
High-quality solid hardwood construction with brass fittings.
Measures 9.2cm x 9.2cm x 5.7cm.
Very good condition.
Telegraph Galvanometers:
A galvanometer is an instrument for measuring electric current. An electric current is passed through coils, and the resultant magnetic field deflects a magnetised needle. The amount of deflection of the needle is therefore proportional to the size of the electric current passing through the galvanometer coils.
Galvanometers found a variety of uses within telegraphy for testing telegraph circuits. However, they were also used to indicate the direction and magnitude of the current produced by the telegraph signals being sent or received.
Siemens Bros & Co London 15049 Galvanometer Antique Telegraph Instrument Rare
£200.00