Vemco D-171 Pocket Architect's Scale

This six-inch metal rule has a white coating. One side has scales dividing the inch into 40 parts, numbered in both directions by twos from 0 to 40, and into 10 parts, numbered in both directions by ones from 0 to 6. This side is marked: VEMCO PASADENA, CALIF. D-171. The other side has scales dividing the inch into 50 parts, numbered in both directions by twos from 0 to 30, and into 30 parts, numbered in both directions by twos from 0 to 18. A tan suede sleeve has a round white sticker marked: 8-63 (/) $2.45 (/) Four-Bevel.
Francis E. Vaughan and Floyd Eubanks founded V & E Manufacturing, or Vemco Corporation, in Pasadena, Calif., in 1939 to make high-quality drafting instruments. Eubanks patented eight drafting machines and drawing instruments in the early 1940s.
Reference: Vemco Drafting Products Corporation,
Currently not on view
Object Name
scale rule
date made
ca 1963
Vemco Corporation
Physical Description
suede (overall material)
metal (overall material)
overall: .3 cm x 28.3 cm x 3.8 cm; 1/8 in x 11 5/32 in x 1 1/2 in
place made
United States: California, Pasadena
ID Number
accession number
catalog number
Scale Rules
Science & Mathematics
Drafting, Engineering
See more items in
Medicine and Science: Mathematics
Scale Rules
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of George A. Norton
Additional Media

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