General Instrument discount indicator
date: label: date made
content: ca 1898
name: label: maker
content: General Instrument Corporation
notes: label: Description (Brief)
content: Wright Patent, Patent dated May 25, 1897 (this may be US 583242, Wire Coupling and Binding Post, to John A. Wright). Called a discount indicator. Meter is housed in a steel case mounted on a mounting board. The front of the case is hinged at the bottom, giving access to the meter movement. On the front cover of the case is : "Wright Patent, G.I. Discount Indicator." There are two attachment lugs, one on each side of the meter movement which are supported by porcelain stand offs. Note in file: "heat in conduction around bulb heats air, moving indicating liquid." Prof. Rollins noted: "It worked on a very different principle in those days."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Tufts University, Departments of Electrical Engineering and Physics
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.336475
label: accession number
content: 270107
label: catalog number
content: 336475
label: collector/donor number
content: 67
objectType: label: Object Name
content: meter
label: Object Name
content: ammeter
label: Object Name
content: ampmeter
physicalDescription: label: Measurements
content: overall: 60 cm x 20 cm x 11 cm; 23 5/8 in x 7 7/8 in x 4 5/16 in