4.4 Dietzgen, USA
Chicago-based Dietzgen, founded in 1885, made slide rules from component parts bought from other organizations (original equipment manufacturers, OEMs), often from Faber-Castell, and sold their final products in the American market. Still in business today, Dietzgen ceased making slide rules in about 1972, but was creating fine instruments in competition with K&E and Post/Hemmi at the time.
Total number of Dietzgen slide rules in the collection: 13.
||1904||L||wd||10||no||Multiplex rule, Br-B’’ scale; E (K) scale on lower edge; chiseled metal cursor; no serial no.; Mack adjustment; 1898,1904 patents; Equiv. labeling on back mostly missing|
||1905||682A||L||wd||10||yes||Multiplex rule, Br-B’’ scale; E (K) scale on lower edge; chiseled metal cursor; Mack adjustment; 1904 patent; owner Oscar Sorensen, Sacred Heart, Minn., Canby Minn., Box 82|
|1761-AL||1910-1912||8709A||L||wd||8||yes||Multiplex rule, Br-B’’ scale; owner Charles A. Kroft, 5-30-27, Chassis Engineering, Studebaker Corp., So. Bend, Indiana|
|1759||1914-1915||L||wd||10||no||R scale (reciprocal B); E (K) scale on bottom edge, etched metal cursor|
||1940||L||wd||10||yes||Mannheim; cursor in fragile condition; case is for 1745 LM (magnifier)|
||1952||542899||L||wd||10||yes||Maniphase Multiplex Decimal Trig Type Log Log; worn case; rule in good shape; 87 stamped on end of stock; owned by Reitz|
||1952||548230||L||wd||10||yes + box||Maniphase Multiplex Decimal Trig Type Log Log; rule in very good condition|
|1739-L||1954||L||pl||10||no||Decimal Trig Log Log; no case, but good condition; made in Germany; clear-scale|
||1963||36353||L||pl||10||yes||Microglide Decimal Trig Log Log; decimal trig type log log; nice condition; conversion table|
||1965||L||pl||10||yes||National; Made in U.S.A.; torn case; conversion table|
|N1725||1967||77961||L||wd||10||yes||Microglide Vector Type Log Log; leather case; owner George Locke|
|1776||1972||L||pl||5||yes + box||Redirule Pocket Duplex; box, instructions, leather case|