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BNPS.co.uk (01202 558833)<br />
Pic: Christie's/BNPS<br />
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Edison's lightbulb moment...<br />
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Annotated design drawings by inventor Thomas Edison for the lightbulb have emerged for sale for £90,000.<br />
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They were made by the workaholic while he was on honeymoon with his second wife Mina Miller in Florida in 1886.<br />
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Edison was determined to refine the design of the first electric lamp which he introduced to the world seven years earlier.<br />
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In total, there are seven pages of pencil drawings revealing several electric lightbulb designs. Others show electric lamp circuits, a horseshoe electromagnet and a cylinder made up of individual tubes with connecting wires. The drawings, which carry Edison's initials 'TAE', are going under the hammer with auctioneers Christie's London.