Telegraph Mirror Galvanometer - Elliott Brothers, circa 1900 Reg. No: ST 008425
- Mirror galvanometer used for receiving telegraph signals transmitted through submarine cables.
Such signals were too weak and distorted to drive conventional telegraph receiving equipment. The mirror galvanometer was very sensitive. It indicated the arrival of signal current by rotating a small mirror which deflected a beam of light across a screen for interpretation by the operator.
Made by Elliott Brothers of London, about 1900.
- Circular wooden base with central wooden column supporting horizontal brass cylinder with ebonite (?) end plates. Vertical brass rod above cylinder, supporting curved magnet. Brass and steel components. Four brass terminals on wooden base.
- Acquisition Information:
- Donation from Victoria: Public Works Department (PWD), 1916
|Dimensions:||494 mm (Height), 228 mm (Width), 228 mm (Length), 228 mm (Diameter)|
|Tagged with:||electric apparatus instruments, electrical equipment, galvanometers, telegraphy|
|Themes this item is part of:||Australia and the global telegraph network 1854-1902, The Australian telegraph network 1854-1877, Telegraphy Collection, Information & Communication Collection, Science & Measurement Collection|
|Tertiary Classification:||testing equipment|
|Inscriptions:||Label on wooden base:
One end plate of horizontal cylinder engraved:
|Maker:||Elliott Bros, London, England, Great Britain, 1895-1915|