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61855 LEO I Storage Unit (1950)

Description of Photograph

Digital copy of a photograph of a LEO I storage unit attached to a short delay line.

Caption:  'A storage unit for recycling pulses with 1 word delay line. [ms] 20/6/50'

This image appears in the interactive plan for our Virtual LEO I installation, p64.


Research comments: The short delay lines acted as buffers. Each storage unit had 25 thermionic valves. In total LEO had almost 6,000 valves with another 300-400 in the auxiliary equipment. Most of the valves were common types found in televisions and radios at the time, but others were more specialised. Often Lyons purchased ex war department valve stocks. (LM) 

Digital copy made by John Daines, LEO Computers Society, of a photograph in the LEO Computers Collection (formerly part of the National Archive of Historic Computing) at the University of Manchester Library: NAHC/LEO/B1-18

Date: 20th June 1950

Physical Description: 1 digital image (jpeg); black & white; 1 digital image (jpeg); black & white

Archives Hub References: CMLEO/LS/PH/1/61855

Other References: DCMLEO20210214017
Related Topics:

Comment on This Photograph

This exhibit has a reference ID of CH61855. Please quote this reference ID in any communication with the Centre for Computing History.

Photograph of 61855  LEO I Storage Unit  (1950)

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