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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
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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
John Gavey's ring transformer, used between Lavernock and Flat Holm, made by John Gavey, Wales, 1892. Mounted on polished wooden board
William Henry Preece (1834-1913) became Engineer-in-Chief of the Post Office in 1892. At the time he was unconvinced of the theories of Heinrich Hertz as a basis for wireless communication but considered that electromagnetic induction could be used for wireless telegraphy over short distances. John Gavey, his assistant, made this ring transformer for trials held in Wales, between Lavernock Point and the island of Flat Holm, just outside Cardiff, in 1892. The system worked but was impractical for widescale application.
Details
- Category:
- Telecommunications
- Object Number:
- 2004-171
- Materials:
- copper (alloy), wood (unidentified) and leather
- Measurements:
-
overall: 100 mm x 330 mm x 405 mm, 13.4kg
- type:
- transformer
- credit:
- Donated by BT Heritage and Archives
