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54870 Letter from Ernest Lenaerts to John Simmons with paper on the Half-Adder, Apr 1948
| Home > LEO Computers > Lyons Electronic Office (LEO) Archive > CMLEO/DC - David Caminer Papers > Working Files > EDSAC > 54870 Letter from Ern ... Half-Adder, Apr 1948 |
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Transcript of a letter sent to John Simmons by Ernest Lenaerts, who was the engineer seconded from Lyons to the EDSAC project team at the Mathematical Laboratory in Cambridge (the plan discussed in the 'Electronics Machines' report of Nov 1947 - see CMLEO/DC/WF/EDS/1). He describes elements of his work at Cambridge and discussions with Maurice Wilkes. A draft by Lenaerts follows - of a technical description of The Half Adder, evidently a chapter (no 8) of a longer manual or other documentation, including a manuscript diagram of the Half Adder.
Research comments: the document identifies the need for "multichannel input and outputs" to create a commercial model of EDSAC, something that has not been addressed by Hartree and Wilkes at this point in time. Suggests that Creeds might be a manufacturer worth talking to on this front. Also refers to American company A.C. Nielsen who have the specification of an "electronic computor" that is "envisaged" by Raztheon (?Raytheon) Manufacturing Company. (LM)
Related material : Copies of further letters written by Ernest Lenaerts while on his secondment to Cambridge were collected by LEO historian Peter Bird, and have been catalogued as part of the LEO Computers Society archive - see CMLEO/EL/CW/1. Date : 7th April 1948 Physical Description : 2 items (7 pages), paper; typescript and manuscript diagram Provenance : Archive References : CMLEO/DC/WF/EDS/2 , DTC/8/16/26-32 , DCMLEO20171126026-032 This exhibit has a reference ID of CH54870. Please quote this reference ID in any communication with the Centre for Computing History. |
 
This document has been scanned and is available to view online.
Copyright Lyons File Size: 1.65 MB
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