Western Union Relays, Part I
name: label: Collection Creator
content: United Telegraph Workers.
label: Collection Creator
content: Western Union Telegraph Company
setName: label: See more items in
content: Western Union Telegraph Company Records
label: See more items in
content: Western Union Telegraph Company Records / Series 26: Audiovisual Materials / 26.1: Employee Training Films / Western Union Relays
physdesc: label: Extent
content: 1 Motion picture film (reversal, 255 feet)
unitdate: label: Date
content: circa 1931
container: label: Container
content: Reel OF 205.11
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Moving Images
label: Type
content: Motion picture films
scopecontent: label: Scope and Contents
content: Western Union relays, "their principle construction, characteristics, maintenance, and application." Depicts three types of relays in use at the time: two types of polar relay, and single current relay. Schematic of how relays are set up.