Detectors
name: label: Collection Creator
content: Clark, George Howard, 1881-1956
setName: label: See more items in
content: George H. Clark Radioana Collection
unitdate: label: Date
content: 1878-1944
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
identifier: label: Identifier
content: NMAH.AC.0055, Series 50
objectType: label: Type
content: Archival materials
scopecontent: label: Scope and Contents note
content: Series 50 consists of material relating to detectors, especially where constructed as self-contained units. Included are coherers, tone wheels, tickers, magnetic detectors, vacuum tube detectors with control, complete; cat-whisker detectors; crystal detectors; electrolytic detectors; group tuners for use in the audio circuit, tone testers, detector-tester, "ticker" for testing detectors, etc. The materials contains patents, testimonies for G. W. Pickard in Pickard vs. Austin, and general data on detectors including histories; designs, specific and general; methods of manufacture, uses; tests; drawings; photographs; specifications; contracts; patents; litigation records; testimonies; inventors; names and addresses of companies manufacturing detectors; reports; articles; newspaper and magazine clippings; correspondence; notes; blueprints; charts; court proceeding; pamphlets; booklets; experiments; portions of journals; and petitions. This series does not include amplifiers, or individual vacuum tubes. See Series L for index to photographs in Bound Volumes.