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Description: | GEO 20 pt 1, p.3 No 19.1 (written in white ink, removed). TUNGAR BULB CAT 217283 G.E. CO. U.S.A. CJ (stampend on the brass end cap with the G.E. trade mark) MANU The General Electric Company of America circa 1930 United States of America This is a mercury vapour lamp used as a rectifier for a 'Victor' portable X-ray machine. This type of hot cathode rectifier was invented circa 1914 but was not commercially available until after 1924. This was due to the lack of a suitable alloy for lead in wires which could carry the necessary loads. It converted A.C. transformed supplies to D.C. The cathode is suplied via an Edison 47.5 x 35 screw cap | 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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