Talk:National Engineering Laboratory

I've written this short article from my own knowledge of NEL from the mid-1970s. If anyone can fill it out, go ahead. Also, NAFEMS could do with a separate article but I don't know enough of the history to write it. I'll put in a stub though.RDT2 10:50, 12 August 2006 (UTC)

Info on "Leslie and Russell code" of National Engineering Laboratory used in position encoders?

Researching codes used for position encoders (like linear or rotary encoders) for a Wikipedia article (like Gray code), in a 1972 book I stumbled upon a code apparently called "Leslie and Russel code", presumably used or originating at National Engineering Laboratory, UK:

Wightman, Eric Jeffrey (1972). "Chapter 6. Displacement measurement". Instrumentation in Process Control. Butterworth & Co. p. 123. ISBN 0-408-70293-1.

The book states:

"Other forms of code are also well known. Among these are the Royal Radar Establishment code; The Excess Three decimal code; Gillham code which is recommended by ICAO for automatic height transmission for air traffic control purposes; the Petherick code, and the Leslie and Russell code of the National Engineering Laboratory. Each has its particular merits and they are offered as options by various encoder manufacturers. A discussion of their respective merits is outside the scope of this book."

Unfortunately, I could not find any further info on this code, which, perhaps, was more commonly known under another name. Also, I was not able to identify the two persons named Leslie and Russell. If anyone has any further info on this code, or other hints helping to find better info, please reply/ping me. Thanks. --Matthiaspaul (talk) 21:10, 16 January 2018 (UTC)

Meanwhile I could find another source for this code:

Leslie, William "Bill" H. P.; Russell, A. (1964). A cyclic progressive decimal code for simple translation to decimal and analogue outputs (Report). East Kilbride, Glasgow, UK: National Engineering Laboratory. NEL Report 129. (17 pages)

Can someone provide additional background on this?

Does someone know the full names of the authors?

--Matthiaspaul (talk) 19:58, 16 May 2020 (UTC)

Some more publications, which appear to be related but need further investigation:

• Leslie, William "Bill" H. P. (1974). "The work on NC at NEL". In Koenigsberger, Franz; Tobias, Stephen Albert (eds.). Proceedings of the Fourteenth International Machine Tool Design and Research Conference, 12–14 September 1973. The Macmillan Press Ltd. pp. 215–224 [215, 217]. ISBN 978-1-34901921-2. LCCN 73-16545. SBN 333-14913-0. ISBN 1-34901921-6. {{cite book}}: Check |editor-link1= value (help)
• Russell, A. (1963). Binary-code conversion using nor logic units. East Kilbride, Glasgow, UK: National Engineering Laboratory. (9 pages)
• Russell, A. (1966). An absolute digital measuring system using optical grating and shaft encoder. East Kilbride, Glasgow, UK: National Engineering Laboratory. (24 pages)
• Russell, A. (1968). Technical aspects of the NEL absolute grating measuring system. East Kilbride, Glasgow, UK: National Engineering Laboratory. (46 pages)
• Whitwell, Arthur L. (1967). "Decimal data-handling equipment". US3594561A.

Related keywords:

• Whitwell Developments Ltd.: linear and angular measurement and control systems ("Teletrak")
• Moore Reed (Industrial) Ltd.: rotary coded disc encoders in military (the "Auto-scale")
• https://www.sciencedirect.com/science/article/pii/0010448587901527?via%3Dihub

--Matthiaspaul (talk) 09:31, 21 May 2020 (UTC)

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