ADT 400-4 Relay Sprinkler Supervisory Transmitter.
notes: label: Description (Brief)
content: ADT 400-4 Relay Sprinkler Supervisory Transmitter. Four relay coils and 4 clock drives in wood case with hinged cover; holes with wires protruding in hollow of base. Western Union and ADT (American District Telegraph) markings on label.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Thomas Neely, Jr.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1984.0255.14
label: catalog number
content: 1984.0255.14
label: accession number
content: 1984.0255
objectType: label: Object Name
content: Box, Control
label: Object Name
content: alarm transmitter
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 14 1/2 in x 20 1/2 in x 6 1/2 in; 36.83 cm x 52.07 cm x 16.51 cm