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Detectors

National Museum of American History

Object Details

sova.nmah.ac.0055_ref1515
GUID
https://n2t.net/ark:/65665/ep81b86dd11-a494-4828-8a3c-96ec58eb4a89
Collection Creator
Clark, George Howard, 1881-1956
See more items in
George H. Clark Radioana Collection
Date
1878-1944
Archival Repository
Archives Center, National Museum of American History
Identifier
NMAH.AC.0055, Series 50
Type
Archival materials
Collection Citation
George H. Clark Radioana Collection, Archives Center, National Museum of American History, Smithsonian Institution
Collection Rights
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.
Scope and Contents note
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.
Collection Restrictions
Collection is open for research but a portion of the collection remains unprocessed and is stored off-site and special arrangements must be made to work with it. Contact the Archives Center for information at [email protected] or 202-633-3270. Gloves must be worn when handling unprotected photographs, negatives, and slides.
NMAH.AC.0055_ref1515
Large EAD
https://n2t.net/ark:/65665/ep81b86dd11-a494-4828-8a3c-96ec58eb4a89
NMAH.AC.0055
ACAH
Record ID
ebl-1562720312231-1562720312460-5

  • George H. Clark Radioana Collection


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