Pair of Keuffel & Esser 1375P-20 Chain Scales with Drafting Machine Mounts
date: label: date made
content: ca 1950
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: These beveled boxwood rules are faced with white celluloid on the sloping edges. On both rules, one edge is divided to 1/32" and numbered by ones twice. The 18-3/4" rule is numbered from 0 to 36 and from 0 to 18, and the 12-3/4" rule is numbered from 0 to 24 and from 0 to 12. The other edge is divided to 1/32" and numbered by ones. The longer rule is numbered from 0 to 72, and the shorter rule is numbered from 0 to 48. As marks on the rules indicate, the first scale is "half size" and "full size," for making drawings at proportions of 1/2" and 1" to the foot. The other scale is "quarter size," for making drawings at proportions of 1/4" to the foot.
label: Description
content: The rules are marked: PARAGON 1375P-20 K+E KEUFFEL & ESSER CO. Both ends of both rules have irregularly-shaped aluminum mounts that may be screwed to a drafting machine. A green cardboard box for the shorter rule is marked at one end: K+E PARAGON (/) DRAFT. MACH. SCALE (/) 1375P-20 12 IN. (/) MADE IN U.S.A. TRADE MARKS ®.
label: Description
content: Keuffel & Esser was selling drafting machine scales in various configurations by 1936. The firm introduced model 1375P-20 sometime between 1943 and 1954. According to the donor, the instrument was used by her husband, the electrical engineer Robert H. Wieler (1923–1993).
label: Description
content: References: <i>Catalogue and Price List of Keuffel & Esser Co.</i>, 38th ed. (New York, 1936), 206–207; <i>Catalogue and Price List of Keuffel & Esser Co.</i>, 42nd ed. (New York, 1954), 176.
label: Location
content: Currently not on view
place: label: place made
content: United States: New Jersey, Hoboken
topic: label: Subject
content: Mathematics
label: Subject
content: Drafting, Engineering
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Science & Mathematics
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content: Scale Rules
creditLine: label: Credit Line
content: Gift of Norma P. Wieler
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1998.0032.14
label: catalog number
content: 1998.0032.14
label: accession number
content: 1998.0032
objectType: label: Object Name
content: scale rules, group of
label: Object Name
content: scale rules
label: Object Name
content: scale rules, group of
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: boxwood (overall material)
label: Physical Description
content: aluminum (overall material)
label: Physical Description
content: cardboard (overall material)
label: Measurements
content: overall: .8 cm x 47.7 cm x 4.5 cm; 5/16 in x 18 25/32 in x 1 25/32 in