Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", 1843-1897
- Made:
- 1843-1897 in Clerkenwell
- maker:
- Hunt and Roskell
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Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Moving magnet galvanometer with dial inscribed "Greenwich Mean Time", made by Hunt and Roskell Limited, Clerkenwell, London, England, 1843-1897. The face of the instrument reads: 'This needle is deflected precisely at each hour, Hunt & Roskell Ltd, jewellers and watchmakers'.
The principle way time was distributed in Britain in the nineteenth century was by telegraph, and some of the large clock and watchmakers displayed a galvanometer in their windows to provide a time service for passers-by. These timepieces could be set accurately with a simple indicator worked by time signals telegraphed from Greenwich.
Details
- Category:
- Time Measurement
- Object Number:
- 1985-76
- Materials:
- copper (alloy), glass, metal (unknown), paint and wood (unidentified)
- Measurements:
-
overall: 115 mm x 115 mm x 75 mm,
- type:
- galvanometer
- taxonomy:
-
- furnishing and equipment
- measuring device - instrument
