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Description: | L.C.E. 97 (old departmental catalogue number in aluminium paint). 130 (Kelvin bequest number in red cellire). Rheostat Resistance 51.15 Ohms To carry 1.8 Amperes 1/6/76 MANU Unsigned. circa 1850 DES after WHEATSTONE,Charles,Sir. circa 1834 King's College, London, England. This rheostat, invented by Wheatstone to vary electrical potential, is in the form of two parallel rollers connected mechanically by meshed cogs at the end of each roller. One roller is sheathed in wood as an insulator the other is sheathed in conducting copper. A length of silver wire is wound round the two rollers such that when all the wire is transferred to the copper roller it fills the entire length of the groove cut in its surface. When the handle is turned, the wire is transferred from one roller to the other. | License: | http://www.hmag.gla.ac.uk/spirit/rights/ | Publisher: | Hunterian Museum and Art Gallery, University of Glasgow | Rights holder: | Hunterian Museum and Art Gallery, University of Glasgow | Subjects: | SCIENTIFIC COLLECTION : | Source: | Hunterian Museum | Creator: | Hunterian Museum and Art Gallery, University of Glasgow | Identifier: | http://www.huntsearch.gla.ac.uk/cgi-bin/... | Language: | en-GB | Go to resource |
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