Sickles "Diamond Weave" inductance coil in original box
date: label: date made
content: 1923
notes: label: Description (Brief)
content: Marked: "Manufactured by / The F. W. Sickles Company / 337 Worthington Street / Springfield, Mass." and "Diamond Weave coils / One set No. 18A / for Roberts Circuit". Patent date: 1 August 1923. Two sets of woven spiderweb coils affixed to a circular plastic core 2.5" diameter. In original box. A rotating shaft turns a movable coil .75" distant from stator coil. Seven electrical contact points are provided on the base. Large coil: 3.5" dia., small coil: 2.375" dia., shaft axis: 3.125".
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.323322.01
label: catalog number
content: 323322.01
label: accession number
content: 241556
objectType: label: Object Name
content: Inductance, Variable
label: Object Name
content: radio coil
label: Object Name
content: inductance
label: Other Terms
content: radio coil; Radio and Television
physicalDescription: label: Measurements
content: coil only: 4 1/2 in x 4 in x 2 in; 11.43 cm x 10.16 cm x 5.08 cm
label: Measurements
content: box: 4 3/4 in x 4 in x 4 3/4 in; 12.065 cm x 10.16 cm x 12.065 cm