Dietzgen 736B Bow Compass with Pencil Point

Description
This steel and German silver instrument has a needle point on one leg and a holder for a pencil lead on the other. The handle has vertical ridges above a single line of raised metal dots. The width of the compass is adjusted with a pin through the legs and a wheel around the pin between the legs. Additional thumbscrews allow adjusting of the needle and pencil points. The instrument appears to be a Federal Bow Pencil, model number 736B, advertised in 1926 by the Eugene Dietzgen Company of Chicago.
Reference: Catalog of Eugene Dietzgen Co., 12th ed. (Chicago, 1926), 60, 74.
Location
Currently not on view
date made
ca 1926
maker
Eugene Dietzgen Company
place made
United States: Illinois, Chicago
Physical Description
lead (overall material)
german silver (overall material)
steel (overall material)
Measurements
overall: 9.3 cm x 2 cm x 1.5 cm; 3 21/32 in x 25/32 in x 19/32 in
ID Number
1981.0933.21
accession number
1981.0933
catalog number
1981.0933.21
Credit Line
Gift of William J. Ellenberger
subject
Mathematics
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Dividers and Compasses
Data Source
National Museum of American History, Kenneth E. Behring Center

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