Electrad model A-1 "Royalty" variable resistance
date: label: date made
content: ca 1926
name: label: maker
content: Electrad Co.
notes: label: Description (Brief)
content: Marked: "Electrad Inc. / A-1/10 TO 7 Megs. / Pat. 7/27/26"; on box: "Electrad / Royalty / Variable High / Resistance / 175 Varick St. / New York, N.Y. / U.S. Patent 1593658". Commercial wire wound potentiometer in original box. Plastic knob. Instruction leaflet in box. Bottom edge sweep contact.
label: Location
content: Currently not on view
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.321647
label: patent number
content: 1593658
label: catalog number
content: 321647
label: accession number
content: 241556
objectType: label: Object Name
content: resistance
physicalDescription: label: Measurements
content: unit: 1 3/4 in x 2 1/2 in x 1 5/8 in; 4.445 cm x 6.35 cm x 4.1275 cm
label: Measurements
content: box: 2 1/2 in x 2 1/2 in x 2 1/2 in; 6.35 cm x 6.35 cm x 6.35 cm