papers & manuals
"The honor of first establishing the manufacture of calculating machines as an industry goes to Charles Xavier Thomas of Colmar (France), or Thomas de Colmar, as he is more commonly known. Like Hahn, Thomas used the stepped cylinder invented by Leibniz as his digital-value actuator."
"The Piano Arithmometer was built for the
1855 Exhibition in Paris. From there it probably passed on to
his son, Thomas de Bojano, and then to the Comte de Ronseray, the
grandson of de Colmar. The latter loaned it to the 1920 exhibition
of calculating devices put on in Paris by La Societe d'Encouragement
pour L'Industrie Nationale. It was published in their Bulletin.
Your local library may have a copy of a book titled "A Computer Perspective", by the office Charles & Ray Eames, Harvard University Press, 1973. The book is about an exhibit shown in the IBM Exhibit Center in NYC. It moved, I think, to the Field Museum in Chicago, where it was shown for a long time, and now is in the possession of the FDM in Germany.
first Thomas de Colmar patent was No. 1420, 18 novembre 1820
(French). This was the belt driven machine. The Smithsonian
has an example of it.
Copies of these patents can be obtained through the Patent Express, probably on the Internet. They are a British outfit, and very good."
|Last Updated on 10 July, 2004||For suggestions please mail the editors|
Footnotes & References
|1||For a transcription of the British patent No. 13504 issued to Thomas de Colmar, visit Andries de Man's web site.|
|2||Stephen Johnston's article "Making the Arithmometer Count" in the March 1997 issue of the BULLETIN OF THE SCIENTIFIC INSTRUMENT SOCIETY. A lot of excellent information, thoroughly researched."|
|3|| George C. Chase, "History
of Mechanical Computing Machinery." Annals of the History of Computing,
Vol. 2, No. 3, July 198
Photo Source:The Popular-Science Museum in The Hague, Netherlands
lower two photos are courtesy of:Robert Otnes, PhD
|4||JOHNSTON, Stephen, ‘Making the arithmometer count’, Bulletin of the Scientific Instrument Society 52 (March 1997), 12-21. Detailed study on the calculating machines of Charles Xavier Thomas de Colmar (1785-1870). A similar paper, now with splendid colour photographs, is his ‘Le spectacle du calcul’ (with English summary) in La Revue. Musée des arts et métiers 23 (June 1998), 23-32.|