variable inductance
date: label: date made
content: ca 1920
notes: label: Description (Brief)
content: A wooden mandrel wrapped with a 22-turn brass(?) coil, 2 mounting connectors. Coils are numbered 1 through 21 on the mandrel. A sliding rod is on top with a spring clip contact on one end and a brass mounting post next to the knob. A fixed contact is set below the rod. No obvious maker's information.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from William Dubilier?
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN81660U18
objectType: label: Object Name
content: Inductance, Variable
label: Object Name
content: variable inductance
label: Other Terms
content: Inductance, Variable; Components
physicalDescription: label: Measurements
content: overall (closed): 5 in x 2 3/4 in x 11 in; 12.7 cm x 6.985 cm x 27.94 cm