Heany sintered tungsten lamp
date: label: date made
content: ca. 1908
label: date made
content: ca 1908
name: label: maker
content: Heany Lamp Co.
label: maker
content: Heany, John Allen
notes: label: Description (Brief)
content: Heany sintered tungsten lamp, c1908. This tungsten lamp was at the heart of a Patent Office scandal that saw two men jailed and Heany’s patents disallowed. Reference: US Patent 872936, "Tungsten electric incandescent lamp," issued 3 December 1907 to John Allen Heany. See Arthur Bright "The Electric Lamp Industry," for the Heany patent fraud case. There are also contemporary articles in Electrical World.
label: Description (Brief)
content: Brass medium-screw base with skirt, insulator retainer, and porcelain insulator. Seven non-ductile tungsten filaments in series, with 7 upper and 6 lower supports, soldered connectors, offset leads, Siemens seal, cotton insulator. Tipped G-shape envelope. Note porcelain(?) rings attached to upper supports which act as saddles for the filaments. Mazda A type. Manufacturer’s label reads: “.........Volts. .........C.P. Heany Tungsten Lamp. York, PA. 1.2 Watts per US Candle Pat. Dec.25-06 & Dec.3-07 Other Patents Pending”. “H” molded on press, label in stem reads: “........CP. HEANY .......V”. A small [.25” dia.] round label possible with markings is on the envelope.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from International Business Machines, Inc., William J. Hammer Collection
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320661
label: catalog number
content: 320661
label: accession number
content: 241402
objectType: label: Object Name
content: Light Bulb
label: Object Name
content: incandescent lamp
label: Other Terms
content: Light Bulb; Lighting Devices; Edison; Cage; Metal
physicalDescription: label: Measurements
content: light bulb: 5 1/2 in x 3 in; 13.97 cm x 7.62 cm