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£40.00
WW1, Edison and Swan “Q and I” Detector Dated 1916 - VIN1068E
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WW1, Edison and Swan “Q and I” detector dated 1916. This Quantity and Intensity (Q I) was used for telegraph, telephone and other electrical fault finding and testing during WW1.
Edison and Swan United Electric Light Co. Ltd, the company that formed as a result of the 1883 merger of Thomas A. Edison's company and Joseph Swan's company. Joseph Swan of England , invented the light bulb at the same time Edison did. They sued each other, but settled and co-founded Edison and Swan
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