Cathode Ray Tube for Television

Description (Brief)
RCA demonstrated electronic television at the 1939 World’s Fair and other manufacturers quickly began to develop products. Allen B. Dumont Laboratories already produced one of the main components, cathode ray tubes or CRTs. Dumont made these tubes for oscilloscopes but understood they would also serve as picture tubes. This tube has a 3.5 inch face with a white phosphor. The clear envelope allows one to see the electron gun mechanism that produces the stream of cathode rays. Dumont provided tubes for its own sets and for other manufacturers like Globe Television and Phone Corp. of Boston. Globe made mechanical television sets in the early 1930s and presumably was moving into electronic television.
Object Name
cathode ray tube
television picture tube
date made
ca 1940
DuMont Company
Physical Description
glass (overall material)
metal (overall material)
plastic (overall material)
overall: 12 in x 3 1/2 in; 30.48 cm x 8.89 cm
ID Number
catalog number
accession number
American Enterprise
See more items in
Work and Industry: Electricity
American Enterprise
American Enterprise
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
from Fairchild Camera and Instrument Corporation, Dumont Laboratories Div., thru Edgar S. Hill

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