Object Details
sova.nmah.ac.0055_ref1515
- 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