Electricity and Modern Physics, Division of, NMAH, SI
Telefunken Wireless Telegraph Company
American Telephone and Telegraph Company
Bell Telephone Laboratories
11.3 cu. ft.: document boxes, 50 volumes
Mixed archival materials
Espenschied was born in St. Louis and graduated from Pratt Institute in electrical engineering, 1909; on staff of the Telefunken Wireless Telegraph Company, 1909-10; worked for American Telephone and Telegraph Company in various capacities, 1910-34; directed high-frequency transmission development for Bell Telephone Laboratories, 1934-37. Chief interests seem to have been wide-band and carrier waves and wide band systems for communications.
Miscellaneous information on the history of telephonic and wireless communication; considerable personal correspondence about men and events in the field, especially disputed claims of inventions, development, and the like.
Lloyd Espenschied Papers, Archives Center, National Museum of American History