Radiosonde
notes: label: Description
content: An inscription on one end of this cardboard box reads in part “DIAMOND-HINMAN / Ray Sonde / MFGD. By Julien P. Friez & Sons / DIVISION OF BENDIX AVIATION CORPORATION / BALTIMORE, MARYLAND / U.S. PATENTS 2,027,367 1,507,016 AND 1,507,017 / OTHER U.S. AND FOREIGN / PATENTS APPLIED FOR.”
label: Description
content: In 1936, the U.S. Navy asked the National Bureau of Standards to develop a radiosonde for the Navy to use. The NBS gave the project to Harry Diamond (1900-1948), who had previously worked on radio navigation and invented a blind landing system for airplanes. In 1937, Diamond, along with Francis Dunmore and Wilbur Hinmann, Jr., created a radiosonde that employed audio-frequency subcarrier modulation with the help of a resistance-capacity relaxation oscillator. This radiosonde could measure temperature and humidity at higher altitudes than conventional radiosondes at the time due to the use of electric sensors.
label: Description
content: Ref: Lee DeForest, “Wireless Telegraph and Telephone System,” U.S. Patent 1,507,016 (Sept. 2, 1924), assigned to the Radio Telegraph and Telephone Co.
label: Description
content: Lee DeForest, “Wireless Telegraph and Telephone System,” U.S. Patent 1,507,017 (Sept. 2, 1924), assigned to the Radio Telegraph and Telephone Co.
label: Description
content: William R. Blair, “System of Determining Meteorological Conditions by Radio,” U.S. Patent 2,027,367 (Jan. 14, 1936).
label: Description
content: Harry Diamond, W. S. Hinman, Jr., F. W. Dunmore, and E. G. Lapham, “An Improved Radio-Sonde and Its Performance,” Bulletin of the American Meteorological Society 21 (1940): 325-326.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.322322
label: catalog number
content: 322322
label: accession number
content: 247582
objectType: label: Object Name
content: Radiosonde
physicalDescription: label: Measurements
content: overall: 8 1/8 in x 4 3/8 in x 9 1/2 in; 20.6375 cm x 11.1125 cm x 24.13 cm