Eisemann variocoupler
date: label: date made
content: 1923
name: label: maker
content: Eisemann Magneto Corp.
notes: label: Description (Brief)
content: Eisemann variocoupler in original box, includes instruction sheet and mounting hardware. Large coil is 4.5" diameter, small coil is 3.5" dia. Marked: "Eisemann Variocoupler / DWG. No. C-18526 / Mar. 2, 1923"; on box: "Patent Appld For / Eisemann Magneto Corporation / Brooklyn, NY / Detroit, Mich / Chicago, Ill". A variable inductance designed to be used in conjunction with a variable capacitor and grid leak in the input section of a radio detector. The primary winding is in the rotor, the secondary winding is in the stator. Eight switch taps vary the inductance of the primary, with coupling to secondary adjustable by means of the control knob.
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.321410
label: catalog number
content: 321410
label: accession number
content: 241556
objectType: label: Object Name
content: variocoupler
label: Object Name
content: variable inductance
physicalDescription: label: Measurements
content: unit: 6 in x 4 1/2 in x 4 in; 15.24 cm x 11.43 cm x 10.16 cm