Darling & Bailey Drafting Rule
date: label: date made
content: 1852–1853
name: label: maker
content: Darling, Samuel
notes: label: Description
content: Four scales of inches are on this two-sided, 12-inch steel rule used for engineering drawing. On one side, nine inches of one scale are divided to 1/10", one inch is divided to 1/20", one inch is divided to 1/50", and one inch is divided to 1/100". Ten inches of the other scale are divided to 1/16", one inch is divided to 1/32", and one inch is divided to 1/64". The ruler is marked: D. & B. (/) BANGOR Me. (/) U.S. Stnd. It is also engraved: W.A.L.
label: Description
content: On the other side, ten inches of one scale are divided to 1/12", one inch is divided to 1/24", and one inch is divided to 1/48". Eleven inches of the other scale are divided to 1/14", and one inch is divided to 1/28". The ruler is engraved: W.A.L.
label: Description
content: A farmer and sawmill owner turned toolmaker, Samuel Darling (1815–1896) apparently first made machine tools in 1846. He built a dividing engine and partnered with Edward H. Bailey in Bangor, Me., in 1852. The next year, Darling received his first patent and bought out Bailey, and by 1854 he was in partnership with Michael Schwartz of Bangor. That business lasted until Darling moved his craftsmen and equipment to Brown & Sharpe's Providence, R.I., workshop in 1866. Thus, this object was made between 1852 and 1853. For a drafting tool invented by Darling, see 1977.0460.01 and 1990.0317.02.
label: Description
content: An unidentified relative of Erasmus Darwin Leavitt Jr. (1836–1916), the renowned American mechanical engineer and designer of steam engines, owned this rule. (None of Leavitt's children had names that began with "W," and his father's name was also Erasmus.)
label: Description
content: References: Samuel Darling, "Apparatus for Grinding and Shaping Metals" (U.S. Patent 9,976 issued August 30, 1853); Davistown Museum, "Registry of Maine Toolmaker Listings," http://www.davistownmuseum.org/TDMtoolMakers.html; Henry Dexter Sharpe, <i>A Measure of Perfection: The History of Brown & Sharpe </i> (North Kingston, R.I.: Brown & Sharpe, 1949), http://www.roseantiquetools.com/id44.html.
label: Location
content: Currently not on view
place: label: place made
content: United States: Maine, Bangor
topic: label: Subject
content: Mathematics
label: Subject
content: Drafting, Engineering
label: Subject
content: Rule, Measuring
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
label: See more items in
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: 1977.0460.05
label: accession number
content: 1977.0460
label: catalog number
content: 336076
objectType: label: Object Name
content: scale rule
label: Object Name
content: rule
physicalDescription: label: Physical Description
content: steel (overall material)
label: Measurements
content: overall: .2 cm x 30.5 cm x 3.2 cm; 3/32 in x 12 in x 1 1/4 in