Dietzgen 967A Beam Compass

Object Details

Ecobra

Description: This steel instrument is plated with chromium and stored in a leatherette pocketbook case lined with purple velvet. The inside of the flap is marked: DIETZGEN. The back of the case is marked: GERMANY. The beam compass consists of a solid tubular beam, 13" long and 3/16" in diameter; a second solid tubular beam, 6" long and 3/16" in diameter; a coupling for joining the beams with a thumbscrew; a needle point with a micrometer adjustment; a second needle point; a pencil point; a pen point; and a cylindrical case holding one extra lead and two additional needles. The handles on the points are cylindrical with a honeycomb pattern. The thumbscrew on the needle point with micrometer is marked: DIETZGEN GERMANY.; The Eugene Dietzgen Co., a Chicago manufacturer and retailer of mathematical instruments, advertised the model 967A "Champion" brand beam compass and case in the late 1930s for $8.50. Dietzgen may have purchased instruments in the Champion line from Bayerische Reisszeugfabrik, a company in Nuremberg, Germany, that was owned by Joseph Dietzgen and made ECOBRA brand slide rules. See 1984.1071.04.; References: Catalog of Eugene Dietzgen Co., 15th ed. (Chicago, 1938), 141; Dietzgen Essential Drawing Instruments and Materials, cat. no. 38A (Chicago, [1939]), 11.
Location: Currently not on view

ca 1938

Physical Description: chromium (overall material); leather (overall material); velvet (overall material); steel (overall material)
Measurements: overall: 34.7 cm x 6.1 cm x 2 cm; 13 21/32 in x 2 13/32 in x 25/32 in

See more items in: Medicine and Science: Mathematics; Science & Mathematics; Dividers and Compasses

National Museum of American History

GUID (Link to Original Record): https://n2t.net/ark:/65665/ng49ca746a7-3f60-704b-e053-15f76fa0b4fa