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Galvanometer - Thomson Type, circa 1900 Object Reg. No: ST 022124

Thomson (Lord Kelvin) type galvanometer on wooden base. Used at Melbourne Observatory. Probably dates from around 1900. No manufacturer's markings.

A galvanometer measures electrical currents.

The mirror galvanometer was developed by Lord Kelvin (Sir William Thomson) while working on improving electric telegraphic apparatus and was patented in the 1858. It was used for measuring electric currents when high accuracy was required or when measuring high resistance.
Two coil system with air damping. Curved zeroing magnet on slider, with fine screwthread control. 3 terminals. Levelling screws on base. Brass metalwork.
Acquisition Information:
Transfer from Melbourne Observatory, 1945
Discipline: Technology
Dimensions: 37 cm (Height), 16 cm (Width), 16 cm (Length)

More information

Tagged with: electric apparatus instruments, electrical equipment, galvanometers
Themes this item is part of: Melbourne Observatory Collection, Science & Measurement Collection, Positional Astronomy at Melbourne Observatory, Weights & Measures at Melbourne Observatory, Melbourne Observatory & Standard Time in Victoria, Astrographic Catalogue, Transits of Venus, 1874 & 1882, Buildings at Melbourne Observatory, Star Observations & Personal Equation, Meteorology at Melbourne Observatory, 1863-1908, Melbourne Observatory, 1863-1944, Geodetic Survey of Victoria, 1858-1872
Primary Classification: PHYSICAL SCIENCES
Secondary Classification: Electromagnetism
Tertiary Classification: measuring equipment
Inventor: Sir William Thomson, England, Great Britain, circa 1858
User: Melbourne Observatory, South Yarra, Victoria, Australia

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