Allen Bradley "Bradleyohm" adjustable resistor
date: label: date made
content: ca 1925
name: label: maker
content: Allen Bradley Co.
notes: label: Description (Brief)
content: Marked: "Bradleyohm 10 / The Perfect Resistor / Range 10000 to 100000 ohms / Allen Bradley Co. / Milwaukee, Wisconsin." On box: "Pat'd 3-4-13 / Other Patents Pending." Variable resistance between 10 and 100 thousand ohms in original box. Used as a volume control in amplifiers and as a neutralizing or coupling resistance. Reference: Instruction leaflet in box. Pettingell-Andrews Catalog No. 7, 1925-26, page 68.
label: Location
content: Currently not on view
place: label: place made
content: United States: Wisconsin, Milwaukee
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.321523
label: accession number
content: 241556
label: catalog number
content: 321523
objectType: label: Object Name
content: variable resistance
physicalDescription: label: Measurements
content: overall: 2 1/8 in x 2 3/4 in x 1 7/8 in; 5.3975 cm x 6.985 cm x 4.7625 cm