carbon brushes
date: label: date made
content: ca 1930
name: label: maker
content: Automatic Electric Company
notes: label: Description (Brief)
content: A set of small motor brushes sent to Curator Carl W. Mittman in the 1920s or early 30s. Each brush consists of a carbon end piece set in a copper spring, with a brass collar on the opposite end. There are ten brushes, four with flat ends and six with beveled ends. They appear to be unused. A steel spring is included although it is not clear if that is an accessory or unrelated to the brushes. The brushes vary slightly in length. No extant markings on the brushes. Postal label on the box is addressed to Carl W. Mittman, Dept. Mineral & Mechanical Technology, Smithsonian; two 1 cent and two 2 cent stamps. From Automatic Electric Company / Bourse Building / Philadelphia, Pennsylvania.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN81639U07
objectType: label: Object Name
content: Brushes, Carbon
label: Object Name
content: generator components
label: Other Terms
content: Brushes, Carbon; Components; Motors and Generators
physicalDescription: label: Measurements
content: brushes: 2 in x 1/4 in; 5.08 cm x .635 cm
label: Measurements
content: spring: 1 in x 5/8 in x 1/4 in; 2.54 cm x 1.5875 cm x .635 cm
label: Measurements
content: box: 1 1/4 in x 3 3/4 in x 2 3/4 in; 3.175 cm x 9.525 cm x 6.985 cm