Thordarson wireless spark transformer
date: label: date made
content: ca 1910
name: label: maker
content: Thordarson Electric Manufacturing Company
notes: label: Description (Brief)
content: Thordarson 1/4 kilovolt-amp wireless spark transformer. Steel frame with horizontal primary coil. Secondary coil mounted above and perpendicular to the primary. Input current via two connectors on the frame, output current via connectors on top. Nameplate reads: "Wireless Transformer / Type P No. 9153 / K.V.A. 1/4 Cycle 60 / Volts: Pri: 110 Sec: 8000 / Thordarson Electric Mfg. Co. / Chicago, Illinois". Stamped on coil housing: "Thordarson / Electric / Mfg. Co. / Pat Ma[r]ch 3, 1908 / Other Patents / Pending". Transformer for early amateur radio transmitter. Reference: Similar to type R in F. D. Pitts Co., catalog no. 22, page 73.
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.320860
label: catalog number
content: 320860
label: accession number
content: 241556
objectType: label: Object Name
content: Transformer, Wireless
label: Object Name
content: transformer
label: Other Terms
content: Transformer, Wireless; Radio
physicalDescription: label: Measurements
content: overall: 8 1/8 in x 5 1/8 in x 4 in; 20.6375 cm x 13.0175 cm x 10.16 cm