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60493 LEO I Mercury Delay Line, in 'coffin'
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Description of Photograph Photograph of one of the five batteries of 16 delay lines as used on LEO I, in situ in its 'coffin'.
Published in Bird, Peter LEO - The First Business Computer (Wokingham: Hasler, 1994), plate 19.
This image appears in the interactive plan for our Virtual LEO I installation, p23.
Research comments: This photograph shows one of the five batteries of 16 delay lines in its 'coffin' - a thermally lagged enclosure. A box containing the electrical matching sections is also shown. The 'vault' or 'coffin' is about 6ft (1.8m) wide by 9ft (2.75m) long and 1.5ft (0.45m) deep under a false floor. Each tube is about 5ft 3inches long and made of ordinary steel with a bore of 1 inch and is filled with mercury weighing half a ton.
On March 22nd 1950 the first battery of long delay tubes was received from Coventry Gauge and Tool Company, according to the LEO Chronicle. (CM/LM) Provenance Date: c1952 Physical Description: 1 photographic print; black and white Archives Hub References: CMLEO/PB/PH/1/60493 PJB/3/2/34A Other References: DCMLEO20190510024 Comment on This Photograph This exhibit has a reference ID of CH60493. Please quote this reference ID in any communication with the Centre for Computing History. 
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