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ADT 400-4 Relay Sprinkler Supervisory Transmitter.

ADT 400-4 Relay Sprinkler Supervisory Transmitter.

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Description (Brief)
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.
Location
Currently not on view
Object Name
Box, Control
alarm transmitter
Physical Description
wood (overall material)
metal (overall material)
Measurements
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
ID Number
1984.0255.14
catalog number
1984.0255.14
accession number
1984.0255
Credit Line
from Thomas Neely, Jr.
See more items in
Work and Industry: Electricity
Data Source
National Museum of American History
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