Darling, Brown and Sharpe Triangular Scale for Draughtsmen
date: label: date made
content: 1880–1892
name: label: maker
content: Darling, Brown & Sharpe
notes: label: Description
content: This nickel-plated steel instrument is crimped in the middle so that the scales along both edges are angled, giving the object the appearance of a triangle and bringing the scale closer to the draftsman's work. Both edges have scales dividing one inch into 48 parts and scales divided to one inch and numbered by ones from 0 to 11. One edge is marked: D.B.&S. PROV. R.I. Pt. Aug. 3. 80.
label: Description
content: Darling, Brown & Sharpe of Providence, R.I., marketed this rule to draftsmen and architects for making scale drawings in which 1" = 1'. For more information on the history of this rule, see 1977.0460.06, which is the same instrument with a scale of 3" = 1'. For another drafting tool designed by Samuel Darling, see 1990.0317.02. This example was owned by the renowned American designer of steam engines, Erasmus Darwin Leavitt Jr. (1836–1916), and donated by his granddaughter, Margaret van D. Rice.
label: Location
content: Currently not on view
place: label: place made
content: United States: Rhode Island, Providence
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 Margaret van D. Rice
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1977.0460.07
label: accession number
content: 1977.0460
label: catalog number
content: 336078
objectType: label: Object Name
content: scale rule
label: Object Name
content: rule, triangular
physicalDescription: label: Physical Description
content: steel (overall material)
label: Physical Description
content: nickel (overall material)
label: Measurements
content: overall: 1.2 cm x 31.2 cm x 2.3 cm; 15/32 in x 12 9/32 in x 29/32 in